Pioneer BDP-120 Service Manual page 23

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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) CONPONENT-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) CONPONENT-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 SC5606.
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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?
Check the peripheral circuits of IC7201.
FLOW CHART No.5
Replace the TV set (cable) and reconfirm.
Still no video and audio output?
Are output voltages of IC4204 as 5V, IC4202 as 3.3V OK?
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Is the data line functioning (Hi/Low)?
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Check IC7802, IC7803, IC7804, IC7805, IC8502, IC8505 and
their peripheral circuits.
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No video signal output from the MAIN PWB Unit
YES
NO
No audio signal output from the MAIN PWB Unit
NO
NO
YES
NO
No video and audio signal output from HDMI terminal.
NO
YES
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YES
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8
NO
Check SC5601.
YES
Check SUB_PC_5V line.
YES
Check the ANALOG PWB Unit.
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YES
Check the peripheral circuits of SC5602.
NO
Check the peripheral circuits of IC5602.
YES
Replace IC5606.
YES
Defective TV set or cable. Or, check the contact of soldered
connector of SC4201.
NO
Check the IC4204 and IC4202 or peripheral circuits.
NO
Replace IC7201.
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Or rewrite the main software.
.
BDP-120
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