Toshiba D-R410KU, Service Manual

Page: 19 / 66

1-8-3 E7K7ATR
Yes
Yes
Yes
Yes
No
No
No
No
FLOW CHART NO.13
The fluorescent display tube does not light up.
Is 3.3V voltage supplied to Pin(6, 24) of IC3001?
Is approximately -24V to -28V voltage supplied to
Pin(15) of IC3001?
Is there approximately 500kHz oscillation to
Pin(26) of IC3001?
Are the filament voltage applied between (1)
and (28) of the fluorescent display tube?
Also negative voltage applied between these pins
and GND?
Replace P3(BOARD FRONT).
Check the EV+3.3V line and replace
P3(BOARD FRONT) if defective.
Check the -FL line and replace P1(AV ASSEMBLY)
or P3(BOARD FRONT) if defective.
Check R3003, IC3001 and their periphery, and
replace P1(AV ASSEMBLY) or P3(BOARD FRONT)
if defective.
Check D1051, D1053, C1051 and their periphery,
and replace P1(AV ASSEMBLY) or
P3(BOARD FRONT) if defective.
No
Yes
Check D1058, D1059, C1060 and their periphery,
and replace P1(AV ASSEMBLY) if defective.
FLOW CHART NO.12
P-ON+3.3V is not outputted.
Is 5V voltage supplied to Pin(1) of IC1503?
Replace P1(AV ASSEMBLY).
No
Is 2.8V voltage supplied to Pin(1) of IC1504?
FLOW CHART NO.11
P-ON+1.8V is not outputted.
Replace P1(AV ASSEMBLY).
Check D1056, C1058 and their periphery, and
replace P1(AV ASSEMBLY) if defective.
Yes
Yes
Yes
No
No
FLOW CHART NO.14
The key operation is not functioning.
Are the contact point and the installation state of
the key switches normal?
Is the control voltage normally inputted into
Pin(1, 2) of IC1501?
Re-install some key switches correctly or replace
P1(AV ASSEMBLY) or P3(BOARD FRONT).
Check the key switches and their periphery, and
replace P3(BOARD FRONT) if defective.
Replace P1(AV ASSEMBLY) or P2(DVD
MECHANISM & DVD MAIN BOARD ASSEMBLY).
0.146
0.161
0.469
0.484
1.100
1.115
1.730
1.746
2.464
2.479
3.300
REC
STOP
POWER
OPEN
/CLOSE
PLAY
SKIP-UP
SKIP-
DOWN
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KEY Terminal voltage of IC1501-1,2 -1
IC1501-1
KEY-2
IC1501-2
(V)