LG LX-D2640 Service Manual page 13

Tuner pack power check
TU601 pin2 +9v power check
YES
PN602 pin4 GND check
Tuner pack Troubleshooting
PLL -CE, DI, DO, CLK check
YES
operation check
YES
normal operation
PLAY check (KIA6289N)
IC202 4Pin VCC power applied
YES
IC201 3,6 Pin signal output check
YES
Q209, 259 Base Low check
ON
C675(+) DC power check
Pattern check
PLL_CEL: Chip Enable
ON
DI: Data input
DO: Data output
CLK: Tuner mode clock
ON
Tuner pack replacement
ON
Refer to power supply check
Deck Mecha operation performance check
IC202 replacement
- 2-6 -
ON
YES
Refer to IC909 troubleshooting
ON
YES
Deck Mecha replacement