Adjustment Procedure - JBL SOURCE Service Manual

Ò
Dolby Pro-Logic Surround Processor/CD Player/Tuner
Test Conditions
AM (Amplitude Modulation)
Function.......................................................................AM
Input Level ............................................74dB/m (5mV/m)
Generator...................................Modulation 30%, 400Hz
Signal or Sweep Generator
Step
Connection
AM TUNING VOLTAGE
1 No Signal
2 No Signal
3 Repeat Step 1 and 2 a few times
AM IF
AM Loop Antenna at a
4 distance of 24 inch (60cm)
from the IRT Loop
AM TRACKING
5 Same as Step 4
6 Same as Step 4
7 Repeat Step 5 and 6 a few times
FM IF
To the FM antenna
8 terminals through a
matching transformer
FM MPX
9 Same as Step 8

ADJUSTMENT PROCEDURE

Reception
Frequency
Frequency
1710kHz
520kHz
Point of
450kHz
noninterference
620kHz 620kHz
1400kHz 1400kHz
Point of
10.7MHz
noninterference
98.1MHz 98.1MHz
Test Condition
FM (Frequency Modulation)
Function.......................................................................FM
Input Level ................................................60dB/m (1mV)
Generator .................................Deviation 22.5kHz, 1kHz
Output Indicator
Connection
DC Digital Voltmeter
JW84
Same as Step 1
IF Sweep Generator
IC101 Pin 12
RF Sweep Generator
R180
Same as Step 5
IF Sweep Generator
IC101 Pin 12
RF Generator
Q181, Q182 "C"
SOURCE
Adjustment Adjust For
TC102 10.5+/-0.1V
L101 1.2+/-0.1V
T101 Flax and Max
L102 Max
TC101 Max
Flat and Max
T102 Check Voltage
T103 Between
R109=0V+/-30mV
SR03 Max Separation
1 1