Philips HTL4111B/12 Service Manual page 25

AUX IN does not work
AUX IN does not work
Check AUXIN Connector
have the signal
Check U6 P11&P4 have
signal On Main PCB
whether or not
Check U6 P10&P9 is high
level?
Check U6 work normal
or not
Change U7
5-7
yes
yes
yes
yes
yes
no
Check AUXIN source
no
Check the R35 R36 C39 C41
whether normal or not
no
Check the 8301 work whether
normal or not
no
Change the U6
Trouble shooting Chart