-15-
Service Adjustments
-15-
INPUT LEVEL 08
HI SEPARATION
21
LOW SEPARATION 34
ADJUST: - /+
CHOOSE:
▲▼
EXIT : MENU
SOUND LEVEL ADJUSTMENT
1.
Connect a signal to the antenna terminal with audio signal
of 1KHz at 100% modulated.
2.
Connect a DC Volt-Meter to
TP-317
( pin-38 of IC3401)
and the ground.
3.
Switch the TV set on, and 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
to the service mode.
5.
Adjust voltage to become DC 400mVrms±20mVrms at
TP317
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 TP-317 (pin-38 of IC3401) and the ground.
Probe-B to TP-318 (pin-39 of IC3401) and the ground.
2.
Turn on the TV set, and receive the multi sound programme.
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.
TP-317
(pin-38 of IC3401)
MAIN BOARD
(Solder side)
TP-318
(pin-39 of IC3401)
INPUT LEVEL 08
HI SEPARATION
21
LOW SEPARATION 34
ADJUST: - /+
CHOOSE:
▲▼
EXIT : MENU
5.
Adjust the level of 300Hz at TP-317 (pin-38 of IC3401)
to become minimum level by pressing the
VOLUME
(+/ -)
button on the remote control or TV set.
Minimum leakage
TP-317(R)
300Hz
TP-317
(pin-38 of IC3401)
MAIN BOARD
(Solder side)
IC3401
IC3401
