Toshiba D-RW2SU Service Manual page 19

FLOW CHART NO.11
EV+3.3V is not outputted.
Is 5V voltage supplied to the collector of Q1063?
Is the voltage of approximately 4V supplied to
the base of Q1063?
Replace Q1063.
FLOW CHART NO.12
P-ON+2.5V is not outputted.
Is 4V voltage supplied to Pin(1) of IC1504?
Replace IC1504.
FLOW CHART NO.13
P-ON+3.3V is not outputted.
Is 5V voltage supplied to Pin(1) of IC1503?
Replace IC1503.
FLOW CHART NO.14
TUNER+5V is not outputted. (EV+5V is outputted normally.)
Is the "H" pulse outputted to Pin(53) of IC1501?
Is the "L" pulse outputted to the collector of Q1056?
Check Q1065, D1066 and their periphery, and
service it if defective.
FLOW CHART NO.15
The fluorescent display tube does not light up.
Is 3.3V voltage supplied to Pin(6, 24) of IC2001?
Is approximately -24V to -28V voltage supplied to
Pin(15) of IC2001?
Is there approximately 500kHz oscillation to
Pin(26) of IC2001?
Are the filament voltage applied between (1)
and (28) of the fluorescent display tube?
Also negative voltage applied between these pins
and GND?
Replace the fluorescent display tube.
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Check D1058, C1060, C1061, L1051 and their
No
periphery, and service it if defective.
No
Check Q1062, D1063, D1064, C1063, C1064, L1052
and their periphery, and service it if defective.
No
Check D1055, C1057 and their periphery, and
service it if defective.
No
Check D1058, C1060, C1061, L1051 and their
periphery, and service it if defective.
No
Replace IC1501.
No
Replace Q1056.
No
Check the EV+3.3V line and service it if defective.
No
Check the -FL line and service it if defective.
No
Check R2003, IC2001 and their periphery, and
service it if defective.
No Check the power circuit, D1051, D1053, C1051
and their periphery, and service it if defective.
1-8-3 E7A70TR