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BD-HP22SB
BDHP22SB
CHAPTER 4.
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_9V, AT_5V, SUB_PC-8V,
SUB_PC_5V supplied to SC9101?
Is 1.05V supplied to TL9019 and TL9016,
3.3V to TL9017, 1.8V to TL9018 and
TL9020 respectively?
Is the level of pin (14) of CN5601 at High?
Is 27MHz detected at R7326?
Does pin (1) of CN7203 turn to High and
Low on start-up?
Check IC7802, IC7803, IC7804, IC7805,
IC8502, IC8505 and their peripheral
circuits.
FLOW CHART No.2
Are 12V and 5V supplied to the drive?
Is the SATA cable connected CN8102 and drive certainly?
Pin 2, 3, 5, 6 of CN8102 occasionally turn to low.
Check the drive.
The main PWB circuit doesn't function when the power is turned ON.
NO
NO
YES
YES
YES
YES
YES
The drive doesn't function normally.
YES
YES
YES
Service Manual
NO
Is the level of pin (6) of SC9101 at Low?
YES
Check the POWER pwb.
NO
Check the power PWB.
NO
Check the IC9001, 9002, 9003, 9004, 9005
and their peripheral circuits.
NO
Check R5626 and the analog PWB.
NO
Check X7201 and its peripheral circuits.
NO
Check IC7201 and its peripheral circuits.
NO
Check the power PWB, BD_12V, BD_5V and their peripheral
circuits.
NO
Check the connection of CN8102 and drive.
NO
Check the peripheral circuits of CN7201.
4 – 1
NO
Check the
IC9001, 9002, 9003, 9004, 9005
and their peripheral circuits.
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