M-L11
24
COMPLEX ASSY
COMPLEX ASSY
COMPLEX ASSY
SIDE B
FOR SERVICE
1. AC RY
FOR SERVICE
3. MUTE
FOR SERVICE
2. SP RY
7.1.2 SINGLE OPERATION METHOD
Voltage of each part and method of diagnosing each IC
Test Point for Service
Short
1
FOR SERVICE 1. AC RY
point of the COMPLEX Assy is short-circuited (AC RELAY ON), and the AC power code is inserted
in the power supply outlet.
Diagnosis of Voltage of Each Part
2
The voltage of each part is checked.
Refer to next page (diagnosis point).
Diagnosis of Each IC
1
FOR SERVICE 1. AC RY
point of the COMPLEX Assy is short-circuited (AC RELAY ON), and the AC power code is inserted
in the power supply outlet.
Short
Short
2
FOR SERVICE 2. SPRY
point of the COMPLEX Assy is short-circuited (SP RELAY ON).
3
FOR SERVICE 3. MUTE
point of the COMPLEX Assy is short-circuited (MUTE OFF).
OP amplifier (AMP Assy) . . . . . . IC3001, IC3901, and IC3451
Amplifier (AMP Assy) . . . . . . IC3301 and IC3401
The AUDIO signal (About 1kHz) is input to the input side of each IC, and the output is confirmed.
Refer to next page (diagnosis point).
Note: The single operation confirmation cannot be done, because IC3021(E-VOL) is
controlled with the microcomputer of Stereo CD tuner (XC-L11).
Diagnosis of IC3021
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