LG MICRO Hi-Fi SYSTEM - Page 19

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8. TOUCH-PAD PART CHECK
NO
NO
YES
YES
PN352 1pin 5V
NO
Replace the related part
NO
Refer to SMPS
troubleshooting
Check resistance output of
line CLK:R128 DATA:R126
IC305
28pin check 5V
Check
IC305 13pin, 11pin,
IC100 96pin:CLK,
95pin:DATA
TOUCH-PAD CHECK
YES
OK
YES
OK
YES
OK
9. PWM MODULATION PART CHECK
Check
P7905 9,10pin 3.3V
PWM MODULATION
PART CHECK
Refer to SMPS
troubleshooting
NO
Check if X701
12.288MHz is working
YES
YES
YES
YES
Check IC604 PS9831 VDD
pin power (4,10,22,29,39,47,
56,65,72,87,94) check X601
2pin 3.3V
Replace the related part
NO
YES
Check the
related part of
X701
OK
NO