M/A-Com P5100 Series, Maintenance Manual

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MAINTENANCE
Table 5-2: Symptoms and Procedures for 50 Hz Power Supply 19A149979P2
SYMPTOM PROCEDURE
No output voltage at J801
Check the following:
1. Open F1, F3, F4 or S1.
2. AC voltage on W801.
3.
Open D1, D2, D3, or D4
NOTE: Diodes also referred to as CR1-CR4.
No output voltage at F801A
Check the following:
1. Open F1, F2 or S1.
2. AC voltage on W801.
3. Open diode D1, D2, D3, or D4.
Low output voltage on F801A.
0 < Vo < 25.0 VDC
Check the following:
1. If one of the dual diodes on D1, D2, D3, or
D4 is shorted.
NOTE : All four diode packages contain two
diodes each.
2. Line frequency < 60 Hz.
3. Load current greater than 15.0 amps.
Low output voltage on J801.
0 < Vo < 12.5 VDC
Check the following:
1. If one of the dual diodes on D1, D2, D3, or
D4 is shorted.
NOTE : All four diode packages contain two
diodes each.
2. Line frequency < 60 Hz.
3. Load current greater than 3.0 amps
.
High output voltage on F801A
(>30.0 VDC) or J801 (>16.3 VDC).
Check the following:
1. R1 not connected between pos. 1 and 2 on
F801A.
2. R2 not connected between pos. 1 and 4 on
J801.
3. Line frequency >60 Hz.
No output voltage at F801A
Check the following:
1. Open F1, F2, F4 or S1.
2. AC voltage on W801.
3. Open D1, D2, D3, or D4.
Low output voltage on F801A.
0 < Vo < 25.0 VDC
Check the following:
1. If one of the dual diodes on D1, D2, D3, or
D4 is shorted.
NOTE : All four diode packages contain two
diodes each.
2. Line frequency < 50 Hz.
3. Load current greater than 15.0 amps.
16 LBI-38551D