Philips DVP3355V/F7 Service Manual page 31

FLOW CHART NO.11
Hi-Fi E-E audio does not operate normally.
Is each signal supplied to each pin of IC451 as below?
Front input terminal
Rear input terminal
Yes
Is the 5V voltage supplied to Pin(25, 40, 51) of IC451,
and the 9V voltage supplied to Pin(58) of IC451?
Yes
Is the serial data and the clock signal supplied to
Pin(42, 43) of IC451?
Yes
Is the "L" pulse inputted into the Pin(36) of IC451?
Yes
Is the sub carrier signal (3.58 MHz) inputted to
Pin(45) of IC451?
Yes
Is the audio signal outputted to Pin(53, 57) of
IC451?
Yes
Is the audio signal inputted into Pin(3,13) of
IC751?
Yes
Is the audio signal outputted to Pin(4,14) of
IC751?
Yes
Check the line between Pin(4,14) of IC751 and
the audio output terminal (JK751), and service it if
defective.
L-ch R-ch
No
Pin(15) Pin(10)
No
Pin(14) Pin(9)
No
No
No
No
No
No
No
1-10-11
Check the peripheral circuit of the front input
terminal and service it if defective.
Check the peripheral circuit of the rear input
terminal and service it if defective.
Check the circuit of P-ON+5V and P-ON+9V, and
service it if defective.
Check the line between Pin(42, 43) of IC451 and
Pin(12,13) of IC501, and service it if defective.
Check the line between Pin(36) of IC451 and
Pin(7) of IC501, and service it if defective.
Check the line between the Pin(49) of IC302 and
Pin(45) of IC451, and service it if defective.
Replace IC451.
Check the line between Pin(53, 57) of IC451 and
Pin(3,13) of IC751, and service it if defective.
Is approximately 5V voltage supplied to Pin(16)
of IC751, and approximately -5V voltage supplied to
Pin(7) of IC751?
Check the AL+5V line and the AL-30V
Yes
line (R777,D777), and service it if defective.
Is the "H" pulse inputted into the Pins(9,10,11) of
IC751?
Yes
Replace IC751.
No
No
Replace IC501.
E8E6DTR