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Service Adjustments
SOUND LEVEL ADJUSTMENT
1. Receive the channel with audio 1KHz 100% modulation
signal.
2. Connect a DC Volt-Meter to KFF pin-2 ( pin-38 of IC3401)
and the ground.
3. Set the Surround OFF. Press and hold the MENU button
on the TV set, and press "3" button on the remote control
transmitter to enter the service mode.
INPUT LEVEL
08
HI
SEPARATION
21
LOW SEPARATION
34
+
ADJUST : -
/
CHOOSE :
EXIT : MENU
5. Adjust voltage to become DC 400mVrms±20mVrms at
KFF pin-2 by pressing the VOLUME (+/-) button on the
remote control or TV set.
6. To exit from the service mode, press the MENU button.
STEREO SEPARATION ADJUSTMENT
1. Connect an oscilloscope:
Probe-A to KFF Pin-2 (pin-38 of IC3401) and the ground.
Probe-B to KFF Pin-1 (pin-39 of IC3401) and the ground.
2. Turn on the TV set, and receive the multi sound programme.
Set the Surround OFF.
3. Press and hold the MENU button on the TV set, and press
"3" button on the remote control transmitter to enter the
service mode.
4. Select "LOW SEPARATION" by pressing the CHANNEL
UP/DOWN button on the remote control or TV set.
INPUT LEVEL
08
HI
SEPARATION
21
34
LOW SEPARATION
+
ADJUST : -
/
CHOOSE :
EXIT : MENU
5. Adjust the level of 300Hz at KFF pin-2 (pin-38 of IC3401)
to become minimum level by pressing the VOLUME (+/-)
button on the remote control or TV set.
C3404
J3404
R3402
R3401
C3401
J3402
J3403
KFF pin-1
KFF pin-2 (R)
Minimum leakage
300Hz
-16-
C3411
C3408
C3411
R3406
C3406
R3411
C3407
C3416
R3407
C3436
IC3401
C3431
C3432
C3424
C3452
C3439
C3433
C3451
C3434
1LG4B10Y0020A
MTS BOARD
KFF pin-2
KFF
1
KIF
IC3401
1
MTS BOARD
(Solder side)
C3412
C3
D
C3417
C3413
C3418
R3421
R3422
C3421
C3422
C3423
R3426
J3401
C3427
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