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Adjustments
Model
8902A
Assembly Repaired
A25 Audio Motherboard Assembly
A26 Power Supply Motherboard
A27
Digital Motherboard Assembly
A28 RF Mother Board Assembly
A29
Series Regulator Heat Sink
A30
Line Power Module
A31 Remote Interface Connector
A32 Power Reference Oscillator
A50 AM Calibrator Assembly
A51 FM Calibrator Assembly
A52 Audio Counter/Distortion
Analyzer Assembly
A53 RF Power Assembly
A54 IF Synchronous Detector
Assem bly
Assembly
Assembly
Assembly
Assembly
A55 IF Amplifier/Filter Assembly
A70
Amplifier/Switch Interconnect
A71 IF Amplifier/Detector Assembly
A72 IF Channel/Filter Assembly
AT1 lnput Attenuator
Assembly
TabZe
5-2. Post-Rtyair
Tcsfs,
A
djusfmcnf.~, and Checks (2 o f 2)
Test, Adjustment, or
Check
Power-Up Checks
HP-I6 Functional Checks
Performance Test 6 or 7-Power
Reference
Adjustment 18 or 19-Power
Reference
Performance Test 1-AM
(AM Accuracy at 10 kHz only)
Adjustment 14-AM
Calibrator
Performance Test 2-FM
(FM Accuracy at 10 kHz only)
Adjustment 9-FM
Calibrator
Performance Test 5-Audio
Measurements
Adjustment 21 -Audio
True RMS Detector and Notch Filter Gain
Performance Test 8-Power
Meter
Adjustment 20-Power
Meter Adjustment
Performance Test 10 or 11-Tuned
RF Level
Adjustment 24-IF
Synchronous Detector
Service Special Functions (Use Special Function
53.)
Performance Test 10 or 1 l-Tuned
RF Level
Adjustment 23-Narrow
455 kHz IF Filter
Performance Test 13-High-Selectivity
Gain
Performance Test 12-High-Selectivity
Filters
Performance Test 13-High-Selectivity
Gain
Performance Test 9-SWR
U2 Limiter
Y1
Crystal Oscillator
AT2 10 dB Attenuator
S1, S2 RF Switch
U1
RF
Amplifier
Adjustment 2-Internal
Reference Frequency
Performance Test 10
or
ll-Tuned
RF Level
5-4
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