Sharp BD-HP22SB, Service Manual

Page: 13 / 68

BD-HP22SB
4 – 2
No video signal output from the main PWB.
Is video signal input into each terminal of SC5601?
1) S-VIDEO and COMPOSIT OUTPUT TERMINALS
࡮ 2 pins (SUB_YOUT), 4 pins (SUB_COUT)
2) D-VIDEO TERMINAL
࡮
6 pins (MAIN_YOUT), 8 pins (MAIN_PBOUT),
10 pins (MAIN_PROUT)
NO
YES
Is video signal input into the base of transistor for each buffer?
1) S-VIDEO and COMPOSIT OUTPUT TERMINALS
࡮ Q5604, Q5605
2) D-VIDEO TERMINAL
࡮ Q5601, Q5602, Q5603
Check SUB_PC_5V line.
Check SC5601.
YES
NO
Check IC7201.
FLOW CHART No.3
No audio signal output from the main PWB
Is audio signal input into terminal of each connector?
1) 2ch analog audio connection
Pins (12) (MAIN_L) and (14) (MAIN_R) of SC5601.
YES
NO
Is there output from DAC?
1) 2ch analog audio connection
Check pins (9) and (10) of IC5606.
Check the peripheral circuits of SC5602.
Check the ANALOG pwb.
YES
NO
Is 5V supplied to pin (13) and -8V to pin (11) of IC5606
respectively?
Check the peripheral circuits of IC5602.
NO
Replace IC5606.
YES
YES
Is any digital signal input into pins (1) - (4) of the IC5606?
Check the peripheral circuits of IC7201.
Check the line between each resistor and IC5606.
YES
NO
NO
Is any digital signal detected at each resistor of R7304 to
7315?
FLOW CHART No.4