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TM 11-6625-2958-14&P
Table 5-8. Checks and Adjustments After Replacement of Semiconductor Devices
REFERENCE
FUNCTION OR CIRCUIT
CHECK
ADJUST
Z1
Constant voltage and con-
Constant voltage (CV) line and load reg-
R110, or
stant current differential
uIation. Zero volt output.
R113 (OP-
amplifiers.
tion 020);
Constant current (CC) line and load reg-
R117, or
ulation. Zero current output.
R119
(Option
021)
Q1
Voltage clamp circuit.
CC load regulation.
---
Q20
Short circuit protection. Output current, protection action.
---
Q40, Q41
Mixer amplifier. CV/CC load reguIation. CV transient
R47
response.
Q42, A4Q101,
Driver and error amplifiers.
CV/CC load regulation.
---
A4Q102
Q60, Q61,
Reference regulator.
+12.4V, +6.2V, and -6.2V reference volt-
Q62, Q63
---
ages and reference circuit line operation.
Q70
Overvoltage limit.
Limiting action and level.
---
Q71, Q72, Preregulator control cir- Output voltage, rippIe imbalance, and
Q73
R70, R82
cuit.
preregulator waveforms.
Q90, Q91,
Crowbar.
Crowbar action, trip voltage, voltage
A5R125
Q92
across series regulator when tripped.
A4Q103 thru
Series regulator.
CV/CC load regulation.
---
A4Q108
A42CR1
Preregulator.
Output voltage.
R7O
CR1, CR20
CV/CC OR gate.
CV/CC crossover operation.
---
CR2, CR3
Voltage clamp circuit.
CC load regulation.
---
CR4, CR40,
Temperature stabilizing
Temperature coefficient.
---
I
CR41
diodes.
CR5, CR6,
Limiting diodes.
CV/CC load regulation.
---
CR21
CR7, CR60,
Reference regulator.
+12.4V, +6.2V, and -6.2V reference
CR61, CR62
---
voltages.
CR35, CR36,
Turn-on circuit.
Preregulator control turn-on delay.
---
CR37
CR43, CR45
Bias supply.
+11V, -4V, and -2.4V bias voltages.
---
thru CR49,
CR53, CR54
CR44, CR50
Driver and error amplifier.
Down-programming speed, CV/CC
---
load regulation.
5-17