No Tuner Audio Output - LG RH-2320 Service Manual

7. NO TUNER AUDIO OUTPUT

TU701 Pin 16 (SIF) :
Is there a signal?
YES
IC901 Pin 106, 107
Is there a signal?
YES
IC801 Pin 40, 41 :
Is there a signal?
YES
IC901 Pin 98,
99, 100, 95 (Ain_D0,
AIN_SCLK, AIN_FSYNC,
AIN_MCLK) : Is there
a signal?
YES
When playing DISC,
no audio output
LGE Internal Use Only
Check
IC801 Pin 14 (12V)
NO
Pin 30 (5, 3V) Pin 31, 32
(SCL, SDA) :
NO Check Pin 51/
RST_SAA7138
X901 (24.576MHz)
oscillated?
R906, R909
(SCL/SDA)
IC901 defect
3-12
NO
YES
NO
YES
NO
YES
NO
YES
Copyright © 2008 LG Electronics. Inc. All right reserved.
Replace IC801
Check IC1302
reset circuit
Change X901
Check IC901 power
3.3V & 1.8V
Only for training and service purposes