Philips HTL4111B/12 Service Manual page 27

COAX does not work
COAX does not work
Check
have the signal
Check U9 P1 whether have
signal On Main PCB
Check U9 P4 whether have
signal On Main PCB
Change 8301
yes
Coax Connector
yes
yes
yes
5-9
no
Check Coax source
no
Check the L4 C67 R65 whether
normal or not
Change U9
no
Trouble shooting Chart