Sharp BD-HP22SB Service Manual page 13

FLOW CHART No.3
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)
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 IC7201.
FLOW CHART No.4
Is audio signal input into terminal of each connector?
1) 2ch analog audio connection
Pins (12) (MAIN_L) and (14) (MAIN_R) of SC5601.
Is there output from DAC?
1) 2ch analog audio connection
Check pins (9) and (10) of IC5606.
Is 5V supplied to pin (13) and -8V to pin (11) of IC5606
respectively?
Is any digital signal input into pins (1) - (4) of the IC5606?
Is any digital signal detected at each resistor of R7304 to
7315?
Check the peripheral circuits of IC7201.
No video signal output from the main PWB.
YES
NO
No audio signal output from the main PWB
NO
NO
YES
NO
NO
NO
Check SC5601.
YES
Check SUB_PC_5V line.
YES
Check the ANALOG pwb.
YES
Check the peripheral circuits of SC5602.
NO
Check the peripheral circuits of IC5602.
YES
Replace IC5606.
YES
Check the line between each resistor and IC5606.
4 – 2
BD-HP22SB