Penn DB DataBase

INVENTORY OF SNO DAUGHTERBOARDS AT PENN - Printed           1/26/98            
LAST UPDATED: 7/24/97       DATE IN                
        CRATE TST                
DB# G,B,U LOC CODE * = PASS comments fix Observed status in DB test station First repair Retest Second repair Retest Final status
1 U B     old board   digital signals missing on SNOD chips; no Reset/sam on Ch.0,6 inverted sample Ch4   no repair yet; appears as SNOD trouble      
2 U B     old board. "2" is written on front              
2 U B     old board. "2" is written on back              
3 U B     old board              
4 U B     old board              
5 U B     old board              
7 U B     old board              
1A U B   tested on 12/10/97 old board/ VRES at +5 on Ch 0,low; No signal on Ch.0 low, erratic on Ch 1-all, Digital signal on SnoD erratic; VRES pulse also erratic Change SnoD on U9 SNOD on U9 not changed, but appears to be fine; Ch0low no signasl and does not balance change SNOINT on U11 card works well     passed
1D U B     old board              
2D G M     old board              
3C G M     old board   card seems to work well placed in no prob. detected box card works well     passed
4D G M     old board              
5D U B     old board              
6D G M     old board              
D1       1/2/98 old   No problems observed placed in no prob. detected box card works well     passed
D2       12/10/97 Difficult to balance channels 2,3,6,7 had to pull up 2,3 w/ +V supply and pull down 6,7 w/ -V No problems detected     CARD WORKS WELL     PASSED
D3       12/15/97 channels 0-3 had to be pulled up w. additional +V to go beyond balance; ch0 high dips below balance level at beginning of integration No typical bipolar problems detected; placed in questionable pile Card works well. none       passed
D4       1/2/98 card works well Placed in No prob. Det. Box            
D5       1/2/98 card works well Placed in No prob. Det. Box     need to pull Ch 1high w/ -V supply to balance     passed
D005 G M                    
D006 G B                    
D009 B B T/VBAL   TR20 CH0 missing, VBAL11 cannot be adjusted TR:fixed. Tombstoned resistor no problems detected placed in no prob. Det. Box card works well     passed
D00C G M                    
D00E G B                    
D00F G B                    
D010 G B                    
D012 G B                    
D013 G M                    
D014 G M                    
D015 G M                    
D018             Card seems OK. Reported problems not observed. Any of theses problems should have been detected in the teststation. Good card        
D019 G M                  
D01A G M                    
D01C B B CMOS   all OUT(1 or 4?) outputs drift to above +4.5V [ only out 1 when not being driven by CMOS   Works with VTHRESH adjustment Attach resistor between In2A and C133 to pull signal down        
D020 G M                    
D022 G M                    
D023 G M                    
D025             C159 cannot balance For some reason SNOD was replaced Problem not fixed. Must replace SNOINT Card works well   time
D026 G B   1/7/98 none   no problems detected placed in no prob. Det box card works well     passed
D027             No bipolar problems   card works well     passed
D028 G B                    
D02C       1/7/98   from fixed pile ->no previous record No problems observed placed in no prob. detected box card works well     passed
D031 G M         Ch 0 reversed signal, cannot balance Replace SNOINT U11        
D039 G M INT   VBAL16 out of range in range on MB.            
D03A G B     QU Mark II test stand only              
D03E G B                    
D03D         See old sheet   Reversed signal on C155 Replace U 11 All signals/voltages good; C1&C179 drain .07Amps (ref .15), C176 1.59Amps(ref. 1.29)     passed
D040 G M                    
D042 R B CMOS   No GTVALID from CMOS3 DISC ok -> replace CMOS U4. Did *not* solve problem. VTHRESH cannot seem to be compromised on U10/U12; at favorable Vthresh CH4 SNOD outputs are dead. Bad input signals on IN1A&IN3A Check frontal components. Replace SNOD on U10 Problem not fixed. No input signals on C004 Replace connector    
D048 G B                    
D04A G M INT   VBAL 1, VBAL3 out of range in range on MB            
D04C G B                    
D04E G M                    
D04F G M INT   VBAL1, VBAL5, VBAL12 out of range in range on MB            
D050       1/8/98 found in "CMOS/OTHER" pile   No bipolar problems placed back in 'CMOS/Other' pile        
D051 B M TR   no TR20 on U6, bad ESUM bias TR20 no fix needed -- looked ok at Penn, ESUM still bad            
D054 G M                    
D055 G B                    
D056 U B     No problems detected Placed in No prob. Det. Box     card works well     passed
D057       1/8/98 Found in 'CMOS/Other' pile   No bipolar problems detected placed back in 'CMOS/Other' pile        
D059 G M                    
D05A G B                    
D05C G B                    
D05D G B                    
D05E G M                    
D061 G M                    
D063 G B                    
D065 G M   * 1/7/98 none   no problems detected placed in no prob. Det. Box card works well     passed
D069 G M                    
D06C G B   1/8/98 no problems detected 1/8/98              
D070 G M                    
D072       1/9/98 found in 'CMOS/Other' pile   no bipolar problems detected placed back in 'CMOS/Other' pile        
D073 G B                    
D074 G U INT   VBAL8 out of range in range on MB; can't find - not at Penn            
D075 G B                    
D078 G M                    
D079 G B     none   no problems detected placed in no prob. Det. Box card works well     passed
D07B G M INT   VBAL14 & 16 out of range in range on MB            
D07C G B                    
D07D G M                    
D07F U B     none   card works well placed in no prob. detected box card works well     passed
D082 G B                    
D083 G B                    
D086 G B                    
D088 G B                    
D08A R B INT   ch5 INT out is garbage Mitch says, replace SNOINT (U12); can't find - not at Penn   Replace SNOINT Card works well      
D08D G M                    
D092 B B DISC * abnormal discriminator on Ch 2. [Double counts on pedestal in regime above noise regime. See notebook, 7/3/97] SnoInt Balances on Ch2 High/Low conclude bad SnoD , Replace SnoD U9, solder pins C155 straight signal C154 v-shaped signal, no reset and no sample either, no InA and InB signals on SNOD input dissapeares across C103 Change C103 Card works well      
D095 B M C/D   no RESET CH5, CMOS shift reg errors ch4 DISC: damage to pin, hiZ or Pulldown to GND broken No bipolar problems          
D096 G M                    
D097 G M                    
D099 B B INT   bad integrator on Ch 2, VBAL annot be adjusted on Ch 7   Extreme, erratic oscillation in Ch 0-3; arbitrary check of Ch0 shows it doesn't balance w/ lifted Cpin Change SNOINT on U11; capacitor on C131 needs to be replaced Looks like a bad SNOINT chip on U12 Replace SNOINT on U 12 card works well passed
D09A B B C/D * bad CMOS on Ch 0? GTVALID is abnormally short (~80ns). New problem: jittter in back edge of RES, SAMP, CH0-3 CMOS fixed: mis-stuffed ISETM R (5K instead of 47K) Integration time is too short on Ch1. CMOS problem not fixed. Replace SNOD card works well      
D09B G B                    
D09D G B     QU Mark II test stand only   No problems observed   card works well     passed
D0A0 G B                    
D0A2 G B                    
D0A3 G M INT   VBAL12 out of range in range on MB            
D0A6 G B                    
D0A7 G M                    
D0A9 R B DISC   ch0 Highgain low, unbalanceable. [See scope plot in logbook, 5/7/97] Mitch says, replace SNOD (U9). Replacement did not fix: see logboox, 7/8/97 SNOINT on CH0high does not balance with lifted Cpin replace SNOINT on U11 card works well     passed
D0AB G B                    
D0AC B U GTV   GTVAL 0 on Ch 7, cannot be adjusted - steps are too large? GTV base time 519 ns (expect 460-480) All signals look O.K., need to check GTV   No bipolar problems     No bipolar prob.'s; CMOS pile
D0AF B B INT   bad INT Ch 4   U12 ch4 SNOINT no signal. Replace U12. 1/7/98   card works well     passed
D0B0 G B                    
D0B2 B B C/I   bad integrators on Ch 6 & 7, GT[22] Ch 6 off scale(steps too large) [see logbook, 6/30/97] CMOS: cannot reproduce. INT: VRES off, funny INT out shapes. Replace SNOD U10. After replace: Vres stil bad ch6-7 (5.5 - 6.0 V) All SNOD outputs look good Ch4low not integrating replace SNOINT on U12 card works well     passed
D0B3             No problems observed   card works well     passed
D0B5 G B                    
D0B6 G B                    
D0B8 G M                    
D0B9       1/8/98 Found in CMOS/Other pile; no bipolar problems detected; no atypical current drain from C1-C176 placed in no prob. Det. Box with warning label for possible CMOS trouble            
D0BA G B                    
D0BB G B                    
D0BC G B                    
D0BD B U VBAL   VBAL14 out of range can't find - not at Penn            
D0BE G M                    
D0BF R B D/I   abnormal discriminator on Ch 4; bad integrators on Ch 0,1,2 & 3 INT :CAP at -2.1V . Replace INT U11. VRES ok. (is DISC Q vs Vth prob?) No Reset/Sample on Ch4; 1 set of outputs dead on SNOD replace SNOD on U10 card works well     passed
D0C4 G B                    
D0C5 G M                    
D0C7 G M                    
D0CE G B                    
D0D0 R B CMOS   replace CMOS Ch 2 replace U3; can't find - not at Penn No bipolar problems detected placed back into 'CMOS/Other' pile        
D0D1 G B                    
D0D2 G M                    
D0D5 G M                    
D0D6 G M                  
D0D7             Integration time too short on Ch2. Replace SNOD on U9 C148 bad balance Change SNOINT U12 card works well passed
D0D8 G M   1/8/98     no problems detected placed in no prob. Det box 2nd test looks OK. All D&INT chips running hot, but signals look good. 1/9/98.      
D0DA G B                    
D0DC B B OTHER   data bus problems -- some data bits never driven to GND confirmed. Need to do extensive visual? No problems detected ->in Questionable pile awaiting visual check. No irregularities observed during visual check.          
D0DE G M                    
D0E1 G B                    
D0E2 B B TR   no TR100 Ch 4              
D0E5 G B                    
D0E7 G M                    
D0E9 G B                    
D0EA B B DISC   abnormal discriminator on Ch 3 [narrow noise band in unexpected region. Disc does not respond to Q unless Q >> normal, wrong sign of Q vs Vth slope. See notebook, 7/3/97]   V-shaped signal on C152,straight line on C153, signal does not pass C102 replace C102 card works well      
D0EB G B                    
D0EC G M INT   VBAL1 out of range in range on MB            
D0ED B B INT   bad INT Ch 7 - no Q(L ok) [ DISC problem, not INT -- ped ok but no RES, SAMP on Q inj. See notebook, 7/3/97]   C145 signal=straight line, C144 V-shaped, no signal across C098 change C098 Card works well      
D0EE R B VBAL   VBAL 7 cannot be adjusted ch 2 low gain unbalanced. Can be adjusted. Replace SNOI (U11); can't find - not at Penn No Bipolar problems detected placed back into 'CMOS/Other' pile        
D0EF B B INT   bad INT Ch 0,7 - no Q CH7 : cannot reproduce. Ch0: bad, no Q injected (peds ok.) replace INT U11. Ch0 fixed, ch7 widee pedestals -- may be software glitch. Re-examine. Bad integrator on Ch0,7 Change SNOINT Ch0 fixed Ch7 wide pedestals None All chanells balance well  
D0F0 G B   1/8/98 none   no problems detected placed in no prob. Det. Box        
D0F1             Ch1 RESET too long Change SNOD on U9 Ch 1 Reset still too long; corresponding digital signals on SnoD too long   Ch1 Reset is fine passed
D0F2 G M                    
D0F9 G M                    
D0FB R B C/I   bad CMOS Ch 7, VBAL 7 stuck CMOS: replace U8. I: CH2 low gain unbalanceable. Ch2low does not balance w/ Cpin lifted replace SNOINT on U11 card works well     passed
D0FF G M   1/8/98 none   no problems detected placed in no prob. Det. Box card works well     passed
D100 G B                    
D102 B B INT   CH0, CH2 INT output is garbage.   1 set of SNOD outputs on U9 dead(no reset/sam CH1); possibly bad INT also(bad signal on CH0 low,CH3high replace SNOD on U9 wrong SNOD was replaced Ch0 doesn't balance with lifted Cpin replace SNOINT on U11 No signal coming in to C002. Replace connector  
D106 B B CMOS   about 30 digital failures on CMOS [ random failures on random channels.very strange.] conflict of info.: passed Mark III rev. 11            
D107 G M                    
D112 B B INT   ch2 INT output is garbage. [VRES ~7.0V. See notebook 5/7/97]   same observation as in "comments" section replace SNOINT on U11 card works well     passed
D113 G B                    
D114 G B                    
D115 G M   1/8/98 none   no problems detected placed in no prob. Det. Box card works well     passed
D118 G B                    
D11A G B                    
D11B G M                    
D11F G B                    
D122 G B                    
D125 B B TR   no TR100 from CH0              
D128             C145 Inverted signal Change SNOINT on U12 No problems detected     passed
D129 G B                    
D12A G M                    
D12B G M                    
D12C B B DISC   missing PED Ch 5 [ runt pulses on reset, sample --- some fraction. Do not see at Penn -- need to exactly replicate QU voltages. See notebook, 7/3/97] none All channels look good and balance, sample/reset pulses also good, no problems detected   Ch 4 reset/sample slightly longer than other signals; otherwise card works well     passed with note
D1C9             Appears to be bad SNOD on U9 erratic outputs Change SNOD on U 9      
D1CC       1/8/98 Found in 'CMOS/Other' pile   No Bipolar problems detected placed back into 'CMOS/Other' pile        
D12E               Replace SNOINT on U12 card works well     passed
D12F G B                    
D130 G M                    
D131 B B TR   Bad ESUM bias              
D136 B B INT   bad integrator on ch. 0,1,6,7 - looks like SAMPLE never switches on   Multiple channels not working Bonepile over all ranges of Vthresh 1 channel works while other doesn't, cannot get good signal on all channels at 1 Vthresh value bone pile Same; appears as if both SNOD chips need to be replaced  
D138 G B                    
D13C       1/9/98 Found in 'CMOS/Other' pile   No Bipolar problems detected placed back into 'CMOS/Other' pile        
D13F R B INT   bad INT Ch 4-7 VRES ~-2V ch4-7. Check VBE -- wrong. Replace INT U12. After: VRES ok, pedestals still high, ch 6 sittill unbalanceable, int out funny shape (RC-like) C146 balances at -2.7V, D13F Snoint good. Try replacing SNOD Change SNOINT Problem not fixed, Change Snod Card works well time
D144 B B VBAL   VBAL 13 cannot be adjusted [low gain, ch 5?] can balance this channel. cannot reproduce at Penn -- need more details.            
D14A       1/9/98 Found in 'CMOS/Other' pile   No Bipolar problems detected placed back into 'CMOS/Other' pile        
D153 B B INT   bad integrator on ch. 2   All channels on SNOINT look bad; arbitrary check shows CH2high won't balance with lifted Cpin replace SNOINT on U11 card works well     passed
D154 G B     Pulse on Reset/Sample (Rs1/S1) a bit wide Placed in "Questionable" status pile   Change SNOD on U10 Card works well     passed
D156         no comment   C150 signal drops too low Change C150 Card works well     passed
D157 B B VBAL   bad INT Ch 3 HI VBAL2 stuck   Ch3 high too small doesn't balance w/ Cpin lifted Change SNOINT on U11 1/7/98 card works well     passed
D162         No comments   C176 draws 1.5A instead of 1.29A at -3V          
D16E B B VBAL   VBAL13 cannot be adjusted   U12 ch4 low signal cannot balance. Replace U12. 1/7/97 replace SNOINT U12 card works well     passed
D175 B B INT   abnormal integrator on ch. 7   No Bipolar problems detected          
D18B R B VBAL   VBAL14 stuck ch 5 low cannot balance. Replace SNOUI 12. After fix, still bad: VRES 5.45V Card works well         passed
D199 G M                    
D19E B B VBAL   VBAL2 stuck, bad INT Ch?   U12 SNOINT ch 7 has small overshoot on return. Questionable whether OK? There is a problem with balancing Ch7 Change SNOINT on U12        
D19F B B DISC   abnormal discriminator on ch. 1 and SNOD problem on Ch1     SNOD changed Cannot balance C147 Change SNOINT Card works well  
D1B7 B B INT   bad integrator on ch. 6 (VBAL 15)   All channnels banlance well, voltages are ok. None slight fluctuations in timing on Ch 6 integration-> Questionable   Cannot detect the fluctuations passed
D1B8 B B G/I   bad integrator on ch. 4-6, VBAL 11, 13, 14 can't be adjusted; GTVAL0 ch. 0 out of range   rising edge of all low signals on U12 reach slightly below baseline then slowly curve up to it; Ch6 high has dent in signal at bottom of fall All voltages O.K. replace SNOINT on U12 card works well     passed
D1C0       12/23/97 Power fail   OK - working board          
D1C1 B B OTHER 1/7/98 high current draw on +4, -3.3, +8 & +5V   Check frontal components. Looks like Vreset not getting to U11. 1/7/98. No RESET or SAMPLE but inputs are OK Replace SNOD on U 9        
D1C4       12/15/97 As observed from Queens:Power Fail;still to be tested REPLACE U8 Too high voltage over C159. Two different scope pictures for the same channel on the SNOD   Card works well     passed
D1C7 B B OTHER   high current draw on +4V   bad reset,no sample on Ch0; Ch0 ~100ns longer than others; bad digital signals on SNOD 1signal dead Replace SNOD on U9 same problem Bone pile    
D1C8 B B OTHER   high current draw on +5V   no problems detected placed in no prob. Det. Box card works well     passed
DICC             Integration time too long on several channels          
D1D3             Really bad integrator on U12. Signal looks like a wave function. Reset Sample OK Change Snoint on U12 Card works well      
D1DC B B OTHER   ch. 0-3 do not fire correctly   No problems were observed. 1/7/98   card works well     passed
D1E1 B Q CMOS   GTVAL0 Ch 3 stuck can balance this channel. cannot reproduce at Penn -- need more details.            
D1E6 B     Cannot balance VBAL2 high,bad Int, Ch.7 All channels work/balance/pass it Cannot balance C156 Change SNOINT Card works well      
D1E8 B B INT   bad integrator on ch. 0   Too high voltage over C159. Two different scope pictures for the same channel on the SNOD Change SNOD Still the same problem Change SNOINT Card works fine D1E8 SNOD is good
D41c       * had to switch MB positions     SnoInt on U11 gets hot and begins to burn when tester is on must Re-asess to find problem, for now snoInt on U11 must be replaced Card works well      
D1F8 G M                    
D206 B B CMOS   U8 shorted btw p28, p29              
D209 B B TR   no TR100 all Ch              
D20C B B DISC   abnormal discriminator on ch. 4   No problems detected. We adjusted Vthreshold lower to make board work 1/7/98   Card works well; Vthresh. Just needs to be adjusted to ~.5V     passed
D20E       12/5/97 Voltage supply makes noise when plugged into tester and resistors testboard begin heating up. Placed in "Bone" pile C177 draws 2A and jumps down to +3V from +7.5. C178 jumps down to +2 from +3 and draws .79A. When plugged into tester C176 sitting at -.8V and noisy supply. SNOD on U 9 is extreemly hot. Replace SNOD on U9 card works well     passed
D211 B B VBAL   VBAL 7 stuck   U10 SNOD ch 7 too high. Replace u10. 1/7/98   card works well     passed
D21D B B C/D   no RESET/SAMPLE U10, U2 dead   no Reset/Samples all outputs of SNOD on U10 are dead replace SNOD on U10 Same problem; VTHRESH adjustment has no effect. VSI pin on SNOD U10 sitting at +1.5V vs. -1.8V and cannot be adjusted->could not find component problem Bone pile    
D220         Bad integrator on Ch 5   Cannot balance C154 Change SNOINT Card works well; used +V supply to pull up ch5 low     passed
D224         Bad integrator on Ch1   Bad signals on C156 and C157 balances seem to stick to the lower voltage Change SNOINT Problem not fixed Change SNOD CH1 has no Reset/SAM; 1 set of SNOD outputs appear dead even after repair->bone pile passed; all signals,channels work fine when VLI and VTHRESH are adjusted accordingly
D226         Bad integrator on Ch2 (0,1,8?,3 don't look too good either   No InB signal on SNOD, no signal coming in to C002, J 2 connector broken Change J 2        
D231 B B INT   bad integrator on ch. 7              
D233 B B INT   bad integrator on ch. 0   Bad connection on inductor Resolder Works well after repair      
D237 G M                    
D239 G M                    
D24B G M                    
D24C G B         No problems were observed   card works well     passed
D252 B B INT   bad integrator on ch. 7   No problems were observed None card works well     passed
D255 B B C/I   bad integrator on ch. 2, OUT 1/2 above 4 V              
D26A G M                    
D26C G M                    
D271 G M                    
D272 G M                    
D275 G M                    
D27D G B                    
D280 G M                    
D282       * Bad integrator on Ch5   Cannot balance C149 Change SNOINT Card works well      
D287         Power fail at Queens Replace SNOD chip - U10 2nd ch output too long, ~500 nsec   No bipolar problems detected; C1&C179 sit at 3.3 vs. 4v->questionable   low impwdance across C067 & C209. U8 gets too hot passed
D28B G B         Signal on ch0 too high.Balances well. Change SNOD Card works well      
D28D B B G/I   bad integrator on ch. 2, GTVAL0 ch. 0              
D298 G B                    
D29F U B   12/10/97 No problems detected placed on No prob. Det. Box            
D2A2         Bad integrator on Ch2   Bad signal on C154, cannot balance Change SNOINT Problem not fixed Change SNOD Card works well  
D2A6         No SAMPLE N on U6&U7 3.5Mohm to? CMOS problem No bipolar problems          
D2AB       12/8/97 VRESET/SAM on board are are 1.5v,should be ~1.0v; NO VRESET on any channels on u12 Change SnoD on U10     Card works well      
D2AE         Bad integrator on Ch7, low impedance C144   low impedance and integration time too short on C151 and C150 Replace SNOD Integration time still too short Problem similar to the one on D3B4, the new SNOD must be bad Change SNOD Card works well passed
D2B2 B B OTHER   abnormally high gain on ch. 5 low gain              
D2B5 B B I/O   bad integrator on ch. 7, 28 kOhms across C144     Resolder pin Card works well     passed
D2B7 B B DISC   no RESET P/N, SAMPLE P/N for ch. 5 - all 2kOhms              
D2BA G M                    
D2C2 B B INT   bad integrator on ch. 5   Replace U12 SNOINT. Ch5 does not balance. 1/7/98 card works well       passed
D2CA       12/23/97 Power fail   Ch.2 no signal, also too hot Replace SNOD chip - U10 card works well; C1&C179 draw .07Amps at 4V, seems to be an acceptable reference vs. .15Amps     passed
D2CC B B DISC   card basically works but SAMPLE on ch. 7 looks abnormal   Balances well and signal looks normal None     All is well, but amp. of Ch7 sample a bit small. 30mV instead of 40mV->replace SNOD on U10 Ch7 sample still a bit small->questionable
D2CD         No Reset/Sample on Ch4   Input signals OK Change SNOD on U9 Wrong SNOD replaced Change SNOD Card works well passed
D2CE         Reset on Ch3 2Mohm to GND   No RESET on Ch2 and RESET on Ch 3 never ends Change SNOD on U9 Card works well     passed
D2D4 B B C/O       No response to balance on Ch4 Replace SNOINT Ch6 still bad, shorting the SNOD pins does not result in the right voltage Change SNOD Card works well  
D2D6 G M                    
D2DC G B                    
D2DE B B INT   VBAL7 can't be adjusted - erratic & extreme     U9 and U11 replaced Card passed      
D2E5 G M                    
D2F9 B B I/T   bad integrator on ch. 6; no TR100 from ch. 0 & 3 broken trace between resistors & C2 (or R2?)   runt sample pulses on 1 CH of SNOD (runt samp. On CH6) replace SNOD on U10 card works well     passed
D2FA G B                    
D2FF B B INT   bad integrator on ch. 7   Low impedance across capacitor Change SNOD Impedances OK but cannot balance C144 Change SNOINT Card works fine  
D303         bad integrator on ch. 0   No problems observed   Ch 5 Res/Sam slightly longer than others, but looks O.K.     passed
D308 G B                    
D30B G M                    
D30C G B                    
D30C             No RESET and SAMPLE signal on Ch4. All inputs are fine. Change SNOD on U9 Card works well     passed
D30E B B I/O   bad integrator on ch. 1, 53 kOhms across C157   Ch1 OK, impedances are OK, Bad signal on C150 RC-like. SNOINT balances well Change SNOD Card works well     time
D311 G B         No problems were observed   Res/sam. On Ch 2,5 a little shorter Questionable No notes from Queens about the card passed
D314 B B I/O   bad integrator on ch. 1, no DAV(?) on ch. 6   Cannot change the slope of the signal on C157 Change SNOINT Card works well      
D316     12/5/97 Bad input signals on U11(in1a, in2a) U12 (in4a) Checking Frontal Components Input signals are fixed; bad reset/sam. On Ch 4 amp. >80mV vs. ~40mV; same behaviour on SNOD outputs Change SNOD on U10 card works well     passed
D319 B B G/I * bad integrator on ch. 6, GTVAL0 ch. 3   C147 cannot balance when C pin is down. Balances well when it is up. Possible SNOD problem Change SNOD Card works well      
D324 B B G/I   bad int. on ch. 1, GTVAL0 on ch. 0 can't be adjusted, GTVAL on ch. 7 can't be adjusted   No bipolar problems detected          
D329 G B                    
D32B B B CMOS   OUT1=OUT2 for all Q on ch. 1   Bad signal on Ch1high; impedance across C156 is 3.5MOhm vs. (ref.) 3.0MOhm Change SNOD on U9/solder pins on U11 same problem. No current goes through L8 Replace L8 card works well passed
D32F B B DISC   no RESET/SAMPLE on ch 0-3   All input signals are ok, but no reset or sample signal on U11,balances seem OK Change SNOD problem not fixed; appears as if wrong SNOD was replaced, SNOD U9 has bad outputs Change SNOD U9/solder pins on U11 card works well passed
D330 B B G/I   bad integrators ch. 2&3, GTVAL0 ch. 6   Bad SNOINT on Ch2 &3low; cannot balance Change SNOINT on U11 card works well     passed
D334 G M                    
D337       12/22/97 Power fail at Queens   OK - working board. All SNOINT & SNOD chips get very hot.          
D33A G M                    
D33C         Bad integrator on Ch0   C159 signal straight line, C158 V-shaped,all input signals are OK. Change SNOD card works well     passed
D342     DISC   Bad integrator on Ch3   SnoInt balances->bad SnoD Change SNOD on U9/ solder pins on U11 card works well     passed
D346 G M                    
D348 B B INT   bad integrator on ch. 1   Cannot balance U11 Change SNOINT Card works well      
D352 G M                    
D357 B B DISC   intermittent RESETP on ch. 5     No repair No intermittent RESETP. found on Ch 5, but rising slope on Ch 6 high is not steep enough->possible SNOD problem Change SNOD on U 10 card works well passed
D358 B B D/I   no RESET/SAMPLE on ch. 2, bad integrator on ch. 6   U9 SNOD chip has 2 bad channels; ch2 bad shape, ch3 not working at all. Replace u9. 1/7/98   card works well, but very slight arc in baseline after rising edge. SNOINT balances well Replace SNOD on U10   passed
D35D B B INT   bad integrator on ch. 3              
D35E G M                    
D366             No problems observed   Card works well     passed
D376 B B OTHER * had to switch mb positions double peaks for large Q on ch. 5   Cannot balance Ch0,4,7 only when C pins are up Change both SNODs Card works well      
D37B B B INT   bad integrator on ch. 2   Low impedance over C154 Change SNOD Card works well      
D37C G M                    
D382 B B INT   bad integrator on ch. 5; Could not balance SNOINT Replace SnoInt on U12/ solder pins on U10     card works well     passed
D383 B B INT   bad integrator on ch. 4              
D386 G B     No problems detected   No problems detected Works; Is in no prob. Det. Box card works well     passed
D38F G M                    
D397         Gain of CH 1 is way off   High gain is more low than high Change Capacitor Does not help, must be the D chip Change SNOD Same problem; Bad input signal for Ch 1 high check frontal components. After checking the frontal components the conclusion is that the SNOINT is bad. Did have a similar problem earlier. Change SNOINT on U 11
D39C B B INT * bad integrator on ch. 6   C146 voltage too high, cannot balance Change SNOINT Card works well      
D39D G M                    
D39E       12/23/97 Power fail ok - passed test. Working board. SNOD&INT chips running hot.            
D3B1         SNOD U10 bad.     Change SNOD All is O.K.; signal a bit long on Ch.1 Questionable Integration time fine passed
D3B4       *     Short integration time Replace SNOD Problem not fixed, Replaced wrong SNOD Replace SNOD Card works fine  
D3B8 G B                    
D3C1 G B                    
D3C7         Bad integrator on Ch4 &6   C 150=RC -shaped curve. C146 signal goes in the wrong direction. Certain SNOD and possible SNOINT problem. Replace SNOD on U10 first C150 fixed but C146 still bad Replace SNOINT on U 12 C150&C146 are fine;new problem->No reset/Sam Ch1 half digital signals dead on U9->replace U9 passed
D3CF         Bad integrator on Ch 6   Cannot balance, slope stuck in the positive direction Change SNOINT on U 12 Card works well      
D3DA         Bad integrator on Ch4   Cannot balance C150 Change SNOINT on U 12 Card works well      
D3DB       12/22/97 Power fail at Queens OK - working board OK - working board.          
D3DF             Shape of signal indicates bad Integrator. Slope does not change. Change SNOINT on U 11 Card works well     passed
D3D4       12/23/97 Power fail OK - working board            
D3E5         Bad integrator on Ch5   C154 cannot balance Sam due to a bad disciminator.C balances and the shape of the curve indicates a bad SNOD. C149 balances at 6.7V Change SNOD on U 9. Attach resistor between C149 input and GND. still cannot balance Ch5low after lifting pins->SNOINT problem replace SNOINT onU12 card works well;only need to pull up Ch2high input with +V supply to balance ->attach resistor from VRESET->cannot pull up to balance replace SNOINT on U11  
D3EB             Doubble peaks on RESET/SAMPLE on U10 Replace SNOD on U10 Card works well      
D3EF         Bad integrator on Ch0&1   RC-like signal on C159 and C156 Replace SNOD on U9 Cannot balance ch0,1 Replace SNOINT on U11 Card works well passed
D3F8         Ch 2 bipolar is dead   SNOD on U 9 is not firing on Ch2. Inputs OK. Replace SNOD on U9 Card passed      
D3F7     CMOS   Bad discriminator on Ch 4 This board was fixed twice; It is fairly certain that the type of problem that it has is CMOS related; see NOTE Discriminator is O.K. VTHRESH needed to be brought to 5V for Channels 4-7; No bipolar problems detected         Bipolar=good/CMOS
D3FD       1/2/98 NONE   CARD WORKS WELL PLACED IN NO PROB. DET. BOX Card works well     passed
D3FE       12/8/1997 All tests look good Placed in No prob. Det. Box     Amplitude of Reset/Sam Pulses is ~35mV vs. ~40mV      
U1 U B     old board              
U2 U B     old board              
U3 U B     old board              
U4 U B     old board              
U5 U B     old board/seems to work fine Placed in No prob. Det. Box            
D402             Almost no Sample on U10 and Reset is a short spike. Inputs Ok Change SNOD        
D403         No comments   C159 signal straight line, C158 V-shaped,all input signals are OK. Replace SNOD on U 9 The new SNOD fires somewhat randomly.Must be replaced Change SNOD on U 9 Card works well passed
D40B         Bad integrator On Ch7   C145 cannot balance Replace SNOINT on U 12 Card works well     passed
D410         Ch0 bipolar very dead   No RESET or SAMPLE on Ch0. Inputs are OK Change SNOD card works well     passed
D41C       * Bad signal on Ch1, same signal on either side of C120 Apparent Bone Pile candidate Voltage drops to 0 V across C120 Change C120 Same problem after repair, Cannot balance C156 Change SNOINT ON U11 C156 balances well cannot balance C147 Change SNOINT on U12
D41F         Ch 4 firing randomly   SNOD on U10 is not firing at all. Seems to be dead. Inputs OK Change SNOD on U10 Same problem after repair; Reset/sam. On Ch4 erratic, erratic signals observed on CMOS chip most likely not a bipolar problem; placed in "other/CMOS" pile same behaviour; Ch4 with Reset/Sample erratic appears as VTHRESH problem but acts same over entire range Bone Pile
D41D         Power fail at Queens   Works OK. SNOINT & D chips hot. -3 V drawing 10% more current.          
D422         Bad Integrator on Ch0-3   Signal shapes indicate bad SNOINT.Chip also gets too hot Change SNOINT on U11 card works well     passed
D432         Bad integrator on Ch0   Signal on C158 sinks too low. Change C158 card works well     passed
D43B             Ch 6:No SAMPLE, RESET=short spike. Inputs OK. Change SNOD on U 10 Card works well      
D4AB             Itegration time 100ns shorter on U11 than on U10. Change SNOD on U 9 Card works well      
D4C6             Impedance between SNOD pins and GND too high. No sample or reset signal Replace SNOD on U9        
D4B1       12/23/97 Power fail   no signals from U10; also too hot to touch replace SNOD chip - U10 old problem fixed; large spike signal on CH0 low, cannot balance Replace SNOINT on U11 card works well passed
D4DC         Bad integrator on Ch4-7   Cannot balance C146 Change SNOINT Card works fine      
D4BD         Bad SNOD on ch4-7   The previous statement is true indeed. No sample or reset on Ch6 and shorter int times on 4,5and 7. Input to SNOD ok Change SNOD CH 6 is erratic; erratic reset/sample also erratic digital signals on SNOD (U10) placed in Bone pile Card works well; only needed Vthresh. Adjustment passed
D4E5         Returned from Queens   SNOD fires randomly on Ch6. C157 signal stuck, no signal on C pin. RESET/SAMPLE look fine. Replace SNOD on U10 and Snoint on U 11        
D44E       12/5/97 No problems detected, placed in box       Card works well     passed
D4EB         SampleN/SampleP reversed on Ch 0,3,4   Old board 30-96          
D4FD       12/5/97     Possible SnoD problem ; could not balance VBAL5 high Replace SnoInt on U12 SNOD not working Replace SNOD Card works well  
D451         Bad integrator on Ch3   Signal v-shaped on Ch3 Change SNOD on U9 C158 voltage too low C153 still the same problem Change SNOINT on U9 Card works well  
D459             Cannot balance C156, voltage too low. Also a possible bad discriminator but change SNOINT first and ee what happenes Change SNOINT Card works well      
D45B         Returned from Queens   C157 balances at 4.2 V Attach resistor Card works well      
D460             Bad signal on Ch5,cannot balance Ch5, bad short voltage on SNOD corresponding pins Change SNOINT Ch5 still bad. C149 no signal, C148 v-shaped signal Change SNOD on U10 card works well passed
D478         No SAMPLE or RESET from Ch0   Integration time too short Change SNOD on U9 Card works well      
D481         C149 voltage too low   C149 cannot balance, C148 balances at -2.8V Change SNOINT Problem not fixed.Input signals OK. SNOINT=good Change SNOD Card works well  
D498         Bad integrator on Ch5   RC-like signal on CH5 Change SNOD Card works fine      
D2DC         Bad integrator on Ch4-7   Funny signal shape on C146. GTVALID too short          
D50E       * Bad integrator on Ch5   Snoint balances well. RC-shaped signal on Ch5 Change SNOD        
D4C8             Funny signal on C158. Looks like a high frequency wave. Balances OK, funny shape disappeares when SNOD pins are up. Change SNOD Problem not fixed. Must be a SNOINT problem Change Snoint still has a funny signal on Ch0 high; base-line appears to oscillate at high frequency, otherwise signal balances.; Reset V on ch0 high is +3.199 while all others are consistently +3.26; possible component problem (capacitor looks dislodged)->replace capacitor on C158 same problem persists->bone pile
D4F5         VBAL5 cannot be adjusted   Ch 5 balances fine but not Ch0 (C159) Change SNOINT Card works well      
D4FB       12/8/97 All signals balance; Res/Sam good Placed in No prob. Det. Box works well   Ch6 difficult to balance; jumps up and down-> questionable Replace SNOINT   passed
D512         Returned from Queens   C156 cannot balance. Replace SNOINT on U11, resolder pins        
D517     Int 12/5/97 *     Could not balance SNOInt for several pins on U11 even with lifted pins Replace SnoInt on U11 Card works well      
D50F       12/8/97 SnoInt chip on U11 heats up when tester is on; different VRESET for each channel/strange signals     Placed in "Bone Pile" for now   Change SNOINT Problem on the other SNOINT. Unable to balance U12. Replace it  
D51A             Sample signal reversed and too short. Very small RESET signal Replace SNOD on U 10 Card works well     passed
D3E2       12/8/97 Short 7.5 to gnd = 1.5 ohms and -3 to gnd = 4.4 ohms   power supply makes noise when tester plugged in , C177 draws 1.11A at +7.5V, C178 draws .3A at +3V-> SNOINT on U12 too hot to touch; C176 at -2V replace SNOINT on U12 Card works well     passed
D508         old board              
D4E8       * No problems detected Placed in No prob. Det. Box     Card works well     passed
D524             C145=straight line, C144=V-shaped. Inputs OK.Change SNOD on U10 Change SNOD Card works well      
D526         Ch7 RESET oscillating.   Ch 5 SAMPLE oscillating Change SNOD on U10 Card works well     passed
D533             Cannot balance C154 Change SNOINT Card works well      
D54A         no records   Snod on U10 never fires. Two channels on U 11 balance at a high voltage Replace SNOD on U10 and SNOINT on U 11        
D54F         No comments   Ch0 (C159) Cpin is at 1 volt and cannot be changed. Replace SNOINT on U11        
D54D         No comments   Cannot balance C 159 Replace SNOINT on U 11        
D53C             C149 straight line. C148 V-shaped. Inputs OK. Change SNOD on U 10 Card works well      
D557         No comment   No problems detected          
D55C         No comments   None of the channels on U12 work. SAMPLE/RESET are OK. No reaction to balancing.Must be SNOINT Replace SNOINT on U 12        
D1F2         Power fail +5 37OHMS TO GROUND u3 IS HOT WHEN POWERED UP cmos REPLACE CHIP +5 FILTER CAP NEEDS TO BE REPLACED   cars works well     passed
D43E         +7.5VOLTS 6.2OHMS TO GND U10 HOT WHEN POWERED UP SNOD REPLACE U10 still gets somewhat hot; but all channels balance and work fine         passed
D4D9       12/18/97 POWER FAIL AT QUEENS U10 (HOT) HAS BAD OUTPUTS. &+3V IS +2.75V AT C178. REPLACE SNOD.   Replace SNOD U10 card works well     passed
D22D       12/19/97 POWER FAIL AT QUEENS BOARD WORKS OK; U9-SNOD-CH1&3 SMALL STEP            
D263       12/19/97 POWER FAIL AT QUEENS BAD U9-SNOD,CH.0. VOLTAGES AT C1 &C179 WERE @3.2,NOT 4.0V. REPLACE D-CHIP.   Replace SNOD U9 ALL SIGNALS ARE FINE, BUT C1&C179 ARE STILL @~3.2 VS. ~4v; ->QUESTIONABLE   U3 too hot (15 degrees F) passed
D3CA       12/19/97 POWER FAIL AT QUEENS OK- WORKING BOARD            
D20F       12/19/97 POWER FAIL AT QUEENS OK- WORKING BOARD            
D260       12/19/97 POWER FAIL AT QUEENS OK- WORKING BOARD            
D379       12/22/97 POWER FAIL AT QUEENS Replace U8 CMOS chip. Gets extremely HOT w/4V across C1 or C179.   Replace U8 CMOS chip card works well     passed
D3CB       12/22/97 POWER FAIL AT QUEENS OK- WORKING BOARD            
D409       12/22/97 POWER FAIL AT QUEENS Replace U3-CMOS chip. Gets extremely HOT w/4V across C1.   Replace U3 CMOS chip card works well     passed
D4FA       12/22/97 POWER FAIL AT QUEENS OK- WORKING BOARD            
D3C8       12/22/97 POWER FAIL AT QUEENS OK- WORKING BOARD     card works well; but C1&C179 draw .07Amps vs. (ref.).15Amps at 4V      
D2DD       12/22/97 POWER FAIL AT QUEENS OK- WORKING BOARD            
D1C2       12/23/97 POWER FAIL AT QUEENS Replace SNOINT - U11 U11 too hot to touch; -3V at 2 Amps, too much (ref. 1.29 Amps)   card works well;but C1&C179 draw .07Amps vs. (ref.).15Amps at 4v     passed
D3F4       12/23/97 POWER FAIL AT QUEENS Replace SNOINT - U11 ch.2 gives too big signal and bad shape.   card works well     passed
D03B         Found in 'CMOS/Other' pile   no signal Ch0low; cannot balance w/ lifted Cpin replace SNOINT on U11 Card works well     passed
D037       12/23/97   replace SNOD chip - U10 ch.2 does not give neg. signal out.   SAMB2 on SNOD U10 seems dead ; impedance between SAMB2 and GND is 1.4KOhms vs. (ref.) 1.87KOhms Checking frontal components Inputs OK Replace SNOD on U 10  
D03F       1/9/98 Found in 'CMOS/Other' pile   Ch0low has dip in baseline after rising edge; VRESET is ~2.1V vs. (ref.)2.4V on capacitor, all impedances seem O.K., balances O.K.->possible SNOINT replace SNOINT on U11 card works well     passed
D06B         RC-shape signal on channels 2low, 5low (slow integration); SnoInts balanced after lifted pins ->SNOD problem Replace SNOD chips on both U9 & U10 and solder pins on SnoInt chips Bad input signal on IN3B onU12. Still bad signal on CH2low, Ch5 fixed In bone pile for now        
D081       12/29/97 CH 0-high shows slow integration and amplitude of 30mV vs. 1.6-2.0V; SNOINT balances w/ lifted pin Replace SNOD on U9/ solder pins on U11 same problem remains-> SNOINT problem replace SNOINT on U11 Bad input signal IN4A; check frontal components, seems to have a broken trace leading to C120 Fixed broken trace Signal a lot better but not perfect.  
D002       12/29/97 Bad Integrator on Ch5-low; cannot balance; SNOD chip balances Replace SnoInt on U12/ solder pins on U10     card works well     passed
D000       12/29/97 Bad Integrator on Ch 4-low; Neither SnoInt nor SNOD balance Placed in Bone pile Ch 4low SNOINT doesn't balance with lifted Cpin replace SNOINT on U12 card works well     passed
D004       12/29/97 No problems detected Placed in No prob. Det. Box     card works well     passed
D007       1/9/98 Found in 'CMOS/Other' pile   no bipolar problems detected placed back into 'CMOS/Other' pile        
D06E       1/5/98 Card works well Placed in No prob. Det. Box     card works well     passed
D06F       12/29/97 Bad Integrator on Ch 1-low(positive spike); SnoInt doesn't balance Replace SnoInt on U11     card works well     passed
D00D       12/29/97 No problems detected Placed in No prob. Det. Box     card works well     passed

Last Updated on 1/26/98
By Mitch Newcomer