Toshiba 50HM66 - 50" Rear Projection TV Service Manual page 20

Troubleshooting Flowchart 2006 DLP
Power Does Not
Cycle
Is POD Fan
Yes
Running?
No
9 Volts at
Capacitor Yes
CS110(+)
No
5.0 Volts at
PB504 Pin 4?
Yes
20 Volts at
Yes
P823B Pin 3?
No
Check F873 and
Power Supply
______________________________________________________________________________
2007 Toshiba America Consumer Products, LLC.
SMART2006001_Version2.2
"Dead / Does not Cycle" (Chart 4)
A cycle is when the Blue
LED goes solid then after 10
seconds the Yellow LED
flashes 15 times before both
go out and restart again
9 Volts at
Capacitor
CS110(+)
Yes
3.3vdc at PB90
Pin 4?
No
Change Regulator
PCB or POD Fan
Check F840 and
No
Power Supply
12 Volts at
P823B Pin 6?
No
Check F875 and
Power Supply
P823B
PB80B
CS110
Back AV & Regulator PCB
Change Regulator
PCB
No
6 Volts at Pin
No
18 of PB90?
Change Digital
Yes
PCB
Location PCB
PB504 Back AV
CS110 Back AV
P823B Regulator
P822B Regulator
PB90 Regulator
PB80B Regulator
3.3 Volts at
Yes PB80B Pin 19
and 20?
Yes
Change Regulator
PCB
P822B
PB90
PB504
19
V1.0
Yes
Is the Blue LED
No Solid and the
Others Off?
Yes
Are the Optic
Yes Engine Fans
Running?
No
Change Optic
Engine
Change TV-Micro
No
PCB
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