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BD-HP17U
CHAPTER 4.
BDHP17U
TROUBLESHOOTING TABLE
[1] TROUBLESHOOTING TABLE
1. MAIN UNIT
FLOW CHART No. 1
The power does not become ON.
YES
The power becomes OFF.
YES
Is the fan turning on when the power
is turned ON?
YES
Check the fan, fan power and their
peripheral circuits.
Are AT_12V, AT_5V, SUB_PC-8V
supplied to SC9001?
Is 1.05V supplied to TL9016, 3.3V to
TL9017 and IC9006: 5 pin, 1.8V to
TL9018, 1.5V to TL9020 respectively?
Is the level of R7244 High?
Is 27MHz detected at R7260?
Does pin (1) of CN7205 turn to High and
Low on start-up?
Check IC7802, IC7803, IC7804, IC7805,
IC8502, IC8505 and their peripheral
circuits.
FLOW CHART No. 2
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.
The main PWB circuit doesn't function when the power is turned ON.
NO
NO
YES
YES
YES
YES
YES
No video signal output from the main PWB
YES
NO
Service Manual
NO
Is the level of pin (6) of SC9001 at Low?
YES
Check the POWER PWB.
NO
Check the power PWB.
NO
Check the
IC9001, 9002, 9003, 9004, 9005, 9006 and
their peripheral circuits.
NO
Check R5626 and the analog PWB.
NO
Check X7202 and its peripheral circuits.
NO
Check IC7201 and its peripheral circuits.
NO
Check SC5601.
YES
Check SUB_PC_5V line.
4 – 1
NO
Check the
IC9001, 9002, 9003, 9004, 9005,
9006 and their peripheral circuits.
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