TE20-00155 REV A: MEMORY POWER SUPPLY TEST PROCEDURE
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TABLE OF CONTENTS 

PARA. TITLE 

1.0 SCOPE

2.0 REFERENCE DOCUMENTS

3.0 EQUIPMENT REQUIRED 

4.0 PRECAUTIONARY INSTRUCTIONS 
4.1 Test Cable

5.0 PRELIMINARY CHECK
5.1 Visual Check 
5.2 Resistance Check 

6.0 MEMORY POWER SUPPLY PCB TEST
6.1 Initial Test Set-Up (Figures 1,2 and 3)
6.2 Power up Sequencing 
6.3 Output Adjustments
6.4 Output Ripple 
6.5 Regulation 
6.6 Current Limiting 
6.7 Overvoltage
6.8 Voltage Variation
6.9 Battery Test 

7.0 ACCEPTANCE PROCEDURE 

8.0 REJECTION PROCEDURE 


1.0 SCOPE

This document provides the necessary instructions for testing the Memory
Power Supply Assembly (P/N 903034). 



2.0 REFERENCE DOCUMENTS 

1. Product Specification - Model 200 Memory Power Supply (500127) 
2. Functional Test specification - Model 200 Memory Power Supply (500141)
3. Theory of Operation - Memory Power Supply (504000) 
4. Schematic - PCB Memory Power Supply (903035) 
5. Inspection and Test Stamp Procedure (QA21-00081) 
6. Basic Four Workmanship Standards Manual (BFC 5050) 


3.0 EQUIPMENT REQUIRED

1. Basic Four Automatic Power Supply Tester (Model A) 
2. Dynamic Load Module - 5 AMP Model (2) 
3. Dynamic Load Module - 1 AMP Model 
4. Model 903034/903038 Personality Module for APST 
5. Silver Memory Power Supply Interconnect Test Cable 
6. External Digital Multimeter (DMM) - Fluke 8000A or equivalent 
7. Oscilloscope 


4.0 PRECAUTIONARY INSTRUCTIONS 

1. TEST CABLE 
A Memory Power Supply Interconnect Test Cable has been supplied with
the Automatic Power Supply Tester (APST). Failure to use this cable
may damage the tester or cause erroneous teat results. Proper pin
orientation must always be maintained (i.e. - Pin 1 to Pin 1 .


5.0 PRELIMINARY CHECK

1. VISUAL CHECK 
Visually check the Memory Power Supply PCB for such physical defects
as demaged or missing components, loose or missing hardware, solder
splashes, wrong components or components installed backwards, etc.
Ensure that all polarized caps are installed correctly. 
2. RESISTANCE CHECK 
With the external DMM set to the 2K OHM range, verify the following
readings: 

J1-B to J1-16 greater than 1000 ohms 
JI-B to J1-H greater than 1500 ohms 
J1-B to J1-L greater than 600 ohms 
J1-B to J1-D greater than 20 ohms 
J1-B to J1-A greater than 600 ohms 
J1-B to J1-R greater than 700 ohms 
J1-A to J1-D greater than 600 ohms 
J1-A to J1-R greater than 1200 ohms 
J1-D to J1-R greater than 700 ohms 


6.0 MEMORY POWER SUPPLY PCB TEST

6.1. INITIAL TEST SET-UP 
On the Automatic Power Supply Tester (APST), set up the following
conditions: 

A. MAIN POWER SWITCH to OFF position. 
B. VARIAC KNOB set to O.
C. APST connected to 115 VAC/60 HZ source.
D. DMM set to ON, DC and 20. 
E. MONITOR SWITCH set to A position. 
F. TR/ON/OFF SWITCH set to ON position.
G. MODEL 903034/903038 PERSONALITY MODULE installed with the
BATT SOURCE/LOAD SWITCH set to LOAD position and all other
switches set to OFF. 
H. DYNAMIC LOAD MODULES set up as follows: 

1. CUR/RES SWITCH set to RES position. 
2. HIGH/LOW SWITCH set to HIGH position 
3. TR/OFF/ON SWITCH set to OFF position. 
4. Adjust H-FINE and H-COARSE to FULL CCW position. 
5. Adjust L-FINE and L-COARSE to FULL CCW position. 
6. INTERNAL SWITCH inside the module set to FORWARD 
position. 

I. Install one 5 AMP DYNAMIC LOAD MODULE in LOAD POSITION 3. 
J. Install the other 5 AMP DYNAMIC LOAD MODULE in LOAD 
POSITION 4. 
K. Install the 1 AMP DYNAMIC LOAD MODULE in LOAD POSITION 5. 
L. Install the Memory Power Supply Interconnect Test Cable 
between the APST and the memory power supply PCB, observing 
proper pin orientation on the connectors. 
M. On the PCB adjust all pots fully CCW. 

6.2 POWER UP SEQUENCING 

1. Set the MAIN POWER SWITCH on the APST to the ON position.
2. Set the PWR ON/OFF SWITCH on the PERSONALITY MODULE to ON.
3. Set the +20V SWITCH on the PERSONALITY MODULE to ON. 
4. Verify the following: 

A. FAN is operating inside APST. 
B. DMM on APST indicates +5.0 VDC +/- 1.0 V for MONITOR 
SWITCH POSITION A. 
C. DMM on APST indicates +12.0 VDC +/- 1.0 V for MONITOR 
SWITCH POSITION B. 
D. DMM on APST indicates -5.0 VDC +/- 1.0 V for MONITOR SWITCH
POSITION C.
E. DMM on APST indicates + 13.6. VDC +/- 2.0 V for MONITOR
SWITCH POSITION D. 

6.3 OUTPUT ADJUSTMENTS 

1. +5VDC ADJUSTMENTS: 

A. Set MONITOR SWITCH on APST to POSITION A. 
B. On LOAD NO. 3 set TR/OFF/ON SWITCH to ON position.
C. On LOAD NO. 3 adjust H-COARSE to FULL CW position.
D. On LOAD NO. 3 observe DC AMMERTER while slowly adjusting
H-FINE in a CW direction, until DC AMMETER indicates 1.5 
AMPS. 
E. Observe DMM while adjusting +5V ADJ.POT(R58) from end to end.
F. The voltage swing indecated on the DMM will be at least +4.8
to +5.2 VDC. 
G. Set R58 for a reading of +5.0 on the DMM.
H. Readjust H-FINE on LOAD NO. 3 for 1.5 AMP on the DC AMMETER.
I. Repeat Sections G. and H. if necessary, to obtain the 
correct readings. 

2. +12 VDC ADJUSTMENTS 

A. Set MONITOR SWITCH on APST to POSITION B. 
B. The DMM on APST will indicate +12.0 VDC +/- 1.0 V.
C. On LOAD NO. 4 set TR/OFF/ON SWITCH to ON position. 
D. On LOAD NO. 4 adjust H-COARSE to FULL CW position. 
E. On LOAD NO. 4 observe DC AMMETER while slowly adjusting
H-FINE in a CW direction, until DC AMMETER indicates 0.5 
AMPS. 
F. Observe DMM while adjusting +12V ADJ.POT(R45) from end to end
G. The voltage swing indicated on the DMM will be at least +11.8
to +12.2 VDC. 
H. Set R45 for a reading of +12.0 VDC on the DMM.
I. Readjust H-FINE on LOAD NO 4 for 0.5 AMPS on the DC AMMETER.
J. Repeat Sections H - I if necessary, to obtain the correct
readings. 

3. -5VDC ADJUSTMENTS 

A. Set MONITOR SWITCH on APST to POSITION C. 
B. Set METER SWITCH on PERSONALITY MODULE to ON position. 
C. Adjust METER ADJ for a reading of a 20 ma on M1. 
D. The DMM on APST will indicate -5.0 VDC +/- 1.0 V.
E. Observe DMM while adjusting -5V ADJ.POT (R24) from end to end
F. The voltage swing indicated on the DMM will be at least -4.8
to -5.2 VDC.
G. Set R24 for a reading of -5.0 VDC on the DMM. 

4. BATTERY CHARACTER ADJUSTMENTS 

A. Set MONITOR SWITCH on APST to POSITION D.
B. On LOAD NO. 5 set TR/OFF/ON SWITCH to ON position.
C. On LOAD NO. 5 adjust H-COARSE to FULL CW position.
D. On LOAD NO. 5 observe DC AMMETER while slowly adjusting
H-FINE in a CW direction, until DC AMMETER indicates 360 ma.
E. Obserce DMM while adjusting BAT. CHG. ADJ. (R6) from end to
end. 
F. The voltage swing indicated on the DMM will be at least +13.4
to +13.8 VDC. 
G. Set R6 for a reading of +13.6 VDC on the DMM.
H. Readjust H-FINE on LOAD NO. 5 for 360 ma on the DC AMMETER.
I. Repeat sections G - H, if necessary, to obtain the correct
readings. 

6.4 OUTPUT RIPPLE 

1. With the oscilloscope measure the output ripple, as indecated
below, to ensure that it is less than 50 MV RMS. 

+5 V .......... J1-W 
+12 V .......... J1-Z 
-5 V .......... J1-R 
.0 V .......... J1-Y 

2. On LOAD NO. 4 set TR/OFF/ON SWITCH to OFF position. 
3. Repeat the test indicated in Section 6.4.1 above. 
4. On LOAD NO. 5 set TR/OFF/ON SWITCH to OFF position. 
5. Repeat the test indicated in Section 6.4.1 above 

6.5 REGULATION 

1. Set MONITOR SWITCH on APST to POSITION A and note the
reading on the DMM. 
2. Set MONITOR SWITCH on APST to POSITION B and note the
reading on the DMM. 
3. Set MONITOR SWITCH on APST to POSITION C and note the
reading on the DMM 
4. Set MONITOR SWITCH on APST to POSITION A. 
5. On LOAD NO.3 observe DC AMMETER while slowly adjusting H-FINE
in a CW direction, until DC AMMETER indicates 2.25 AMPS. 
6. Ensure that the DMM reading is no more than +/- 2% from the
reading obtained in Section 6.5.1 above. 
7. Set MONITOR SWITCH on APST to POSITION B. 
8. Ensure that the DMM reading is no more than +/- 2% from the
reading obtained in Section 6.5.2 above. 
9. Set MONITOR SWITCH on APST to POSITION C. 
10. Ensure that the DMM reading is no more than +/- 2% from the
reading obtained in Section 6.5.3 above. 
11. On LOAD NO. 4 set TR/OFF/ON SWITCH to ON position.
12. Recheck MONITOR SWITCH POSITIONS A,B and C to verify that 
the readings have not shifted more than +/- 2% from the readings
noted in Sections 1 - 3 above. 
13. On LOAD NO. 5 set TR/OFF/ON SWITCH to ON position. 
14. Recheck MONITOR SWITCH POSITIONS A, B and C to verify that 
the reading have not shifted more than +/- 2% from the readings
noted in Sections 1 - 3 above. 

6.6 CURRENT LIMITING 

1. Set MONITOR SWITCH on APST to POSITION A and observe DC 
AMMETER while slowly adjusting H-FINE on LOAD NO.3 in a CW 
direction. 
2. Load No. 3 will go into current limiting by or before the time
the DC AMMETER reaches 3.2 AMPS, but not less than 2.4A 
3. Readjust H-FINE on LOAD NO. 3 in a CCW direction foe a reading
2.25 AMPS on the DC AMMETER. 
4. Set MONITOR SWITCH on APST to POSITION B and observe DC 
AMMETER while slowly adjusting H-FINE on LOAD NO. 4 in a CW
direction. 
5. LOAD NO. 4 will go into current limiting by or before the time
the DC AMMETER reaches 2.2 AMPS, but not less than 1.5A.
6. Readjust H-FINE on LOAD NO 4. in a CCW direction for a reading
of 0.8 AMPS on the DC AMMETER. 
7. Set MONITOR SWITCH on APST to POSITION C and observe M1 while
slowly adjusting METER ADJ on PERSONALITY MODULE in a CW 
diretion. 
8. M1 will go in into current limiting by or before the time it
reaches 60 mA, but not less than 40mA.
9. Readjust METER ADJ on PERSONALITY MODULE in a CCW direction
for a reading of 20 mA on M1.
10. Set MONITOR SWITCH on APST to POSITION D and observe DC
AMMETER while slowly adjusting H-FINE on LOAD NO. 5 in CW 
direction. 
11. LOAD NO. 5 will go into current limiting by or before the time
the DC AMMETER reaches .5 AMPS. 
12. Readjust H-FINE on LOAD NO.5 in a CCW direction for a reading
of 360 ma on the DC AMMETER. 


6.7 OVERVOLTAGE 
1. Set TR/ON/OFF SWITCH on front panel of APST to the OFF position.
2. Set MONITOR SWITCH on APST to POSITION A and note reading on DMM
3. With a jumper wire, carefully short across R55 (1 Kohm, 1%).
4. Remove the jumper. The +5 VDC will return to the reading 
indicated in Section 2 above. 
5. Set MONITOR SWITCH on APST to POSITION B and note reading on DMM.
6. With a jumper wire, carefully short across R44 (8.25 KOhm, 1%)
resistor and ensure that the +12 VDC goes to approximately +14.3.
7. Remove the jumper. The +12 VDC will return to the reading 
indicated in Section 5 above. 
8. Set MONITOR SWITCH on APST to POSITION C and note the reading on
DMM. 
9. With a jumper wire, carefully short across R20 (1 KOhm, 1%)
resistor and ensure that the -5 VDC goes to approximately -5.9 
VDC 
10. Remove the jumper. The -5VDC will return to the reading 
indicated in Section 8 above. 
11. Set TR/ON/OFF SWITCH on front panel of APST to the ON 
position which enables all loads. 

6.8 VOLTAGE VARIATION 

1. Set MONITOR SWITCH on APST to POSITION A and note the 
reading on DMM. 
2. With a jumper wire, carefully short between Pins 3 and 2 on J2.
3. The reading indicated on DMM will increase by .25 +/- .05 VDC.
4. Remove the jumper wire on J2 and the reading on the DMM will
return to the reading obtained in Section 6.8.1 above. 
5. With the jumper wire, carefully short between Pins 2 and 1 on J2.
6. The reading indicated on DMM will increase by .25 +/- .05 VDC.
7. Remove the jumper wire on J2 and the reading on the DMM will
return to the reading obtained inb Section 1 above. 
8. Set MONITOR SWITCH on APST to POSITION B and note the reading on
DMM. 
9. With the jumper wire, carefully short between Pins 3 and 2 on J4.
10. The reading indicated on DMM will increase by .6 +/- .12 VDC.
11. Remove the jumper wire on J4 and the reading on the DMM will
return to the reading obtained in Section 8 above. 
12. With the jumper wire, carefully short between Pins 2 and 1 on J4.
13. The reading indicated on DMM will decrease by .6 +/- .12 VDC.
14. Remove the jumper wire on J4 and the reading on the DMM will
return to the reading obtained in Section 8 above. 
15. Set MONITOR SWITCH on APST to POSITION C and note the reading
on DMM. 
16. With jumper wire, carefully short between Pins 3 and 2 on J3.
17. The reading indicated on DMM will increase by .25 +/- .05 VDC.
18. Remove the jumper wire on J3 and the reading on the DMM will
return to the reading obtained in Section 15 above. 
19. With the jumper wire, carefully short between Pins 2 and 1 on J3.
20. The reading indicated on DMM will decrease by .25 +/- .05 VDC.
21. Remove the jumper wire on J3 and the reading on the DMM will
return to the reading obtained in Section 15 above. 

6.9 BATTERY TEST 

1. On LOAD NO.3 observe DC AMMETER while slowly adjusting H-FINE
in a CCW direction, untill DC AMMETER indicates 1.0 AMPS. 
2. On LOAD NO.4 observe DC AMMETER while slowly adjusting H-FINE
in a CCW direction, untill DC AMMETER indicates 0.4 AMPS. 
3. Set METER SWITCH on PERSONALITY MODULE to OFF position.
4. Set MONITOR SWITCH on APST to POSITION D.
5. On PERSONALITY MODULE set BATT LOAD/SOURCE SWITCH to SOURCE
position. 
6. Adjust BATT ADJ on PERSONALITY MODULE for a reading of +14.0 VDC
on DMM.
7. Set the +20 V. SWITCH on PERSONALITY MODULE to OFF position.
8. All voltages will still be good. 
9. Adjust BATT ADJ on PERSONALITY MODULE CCW untill voltages drop
to zero. 
10. The voltages will drop to zero somewhere between +9.6 - 11.8 VDC.
11. Set the +20 V SWITCH on PERSONALITY MODULE to OFF position.
12. Set the POWER/ON/OFF SWITCH on PERSONALITY MODULE to OFF position
13. Set the MAIN POWER SWITCH on APST to OFF position.
14. Remove the MEMORY POWER SUPPLY INTERCONNECT TEST CABLE from the
Memory Power Supply PCB. 

TESTING IS NOW COMPLETE 


7.0 ACCEPTANCE PROCEDURE

When all tests have been executed, the Memory Power Supply PCB shall be
stamped in accordance with the Inspection and Test Stamp Procedure and
appropriate paper work shall be completed. 



8.0 REJECTION PROCEDURE

A Memory Power Supply PCB which fails mechanically or electrically during
testing must be rejected. Items are rejected by following the procedure
outlined in Rejection Procedure. In addition to being rejected, the
defective item must have a Failure Report completed per Quality Assurance
Failure Reporting System.