Philips HTS2511/05, Service Manual

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5-1 Trouble shooting Chart
LED No display on Front Control Board
LED No display on
Front Control Board
Go
Yes
Refer to CN502 on Power Board
No
Fix the connection XP3 on Front
Control Board and XP33 on Main
Board
No
Replace U301 on Front Control Board,
or replace the Front Control Board
No
Check the U301 ON Front Control Board
pin 4 3 arrive the condition XP3 PIN11
PIN10
No
Yes
Yes
Yes
Correct connection
No
Yes
Replace U301 or LED
Check every supply voltage on Main Board
whether normal or not.
(XP33 PIN3:+12V, PIN5&6: +5V)
Check v5V, +12V on Power Board
at CN502 position and Front Control Board
(XP3 PIN14:+5V PIN13:+5V
PIN7:+3.3V)
Check the power key(S608), open/closed
key(S611), source key(S609) Front Control
Board whether work normally or not
Check Front Control Board signals
SCL,SDA
(XP3 PIN11: SCL PIN10:SDA)
Check whether bad solder exists on Front
Control Board of XP3 and LED