Sanyo FVM3982 Service Manual page 3

Repair Flow Chart:Trouble Condition
Green Power LED does not turn on. The TV is dead.
(TABLE *1.0)Analog board:5VSTB Test Points
39" Models
P39842-00 Z6SE
P39842-01 Z6SF
(TABLE *2.0) Power board:5VSTB Test Points
39" Models
P39842-00 Z6SE
P39842-01 Z6SF
(TABLE *3.0)Digital board:5V_STBY Test Points
39" Models
P39842-00 Z6SE
PW39842-01 Z6SF
Green Power LED:
Does not turn ON.
The TV is dead.
On analog signal board:
No:0v
Is the "5VSTB" voltage supplied?
(see TABLE*1.0)
Yes:5v
On digital signal board:
No:0v
Is the "5V_STBY" voltage on
"K5A Pin 3 or Pin 4"?
(see TABLE*4.0)
Yes:5v
While pushing the "power key sw"
No voltage(0v)at K16A Pin17 or 2.9V always present.
is the 2.9V from "key sw2"
supplied to "K16A Pin17"?
(see TABLE*5.0)
Yes
Digital board is not working.
Replace "digital board".
5VSTB on Analog board
Analog K17 Pin4 or Pin5
5VSTB on Power board
Power CN2 Pin4 or Pin5
5V_STBY on Analog board
Analog K16A Pin3 or Pin4
Unplug(CN2) connector on
No:0v
power board. On Power board:
Is the "5VSTB" voltage supplied?
(see TABLE*2.0)
Yes:5v
No:0v
Unplug(K16A) and(K16B) connector
between digital unit and analog unit
Is the "5V_STBY" voltage supplied?
(see TABLE*3.0)
Yes:5v
Replace "digital board".
Analog board is not working.
Replace "analog board".
Analog board was broken.
Replace "analog board".
Power board is not working.
Replace "Power board".
Analog board is not working.
Replace "analog board".
Confirmation Voltage
5V
Confirmation Voltage
5V
Confirmation Voltage
5V
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