Checks And Adjustments After Replacement Of Semiconductor Devices - HP 6269B Operator’s, Organizational, Direct Support And General Support Maintenance Manua L

Table 5-8.

Checks and Adjustments After Replacement of Semiconductor Devices

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