Sanyo DP32640 - FCC INFORMATION; TRADEMARKS

Repair Flow Chart: Trouble Condition
page 2
Green Power LED is on, but LCD backlights are not on.
Backlights do not turn on, or only turn on and back off.
(TABLE *1.0) 12V Test Points
26" Models 32" Models
DP26640-00 N8ME DP32640-00 N8LE
DP26640-01 N8MF DP32640-01 N8LF
DP26640-02 N8MG DP32640-03 N8LH
DP26640-04 N8MH
(TABLE *1.1) 24V Test Points
26" Models 32" Models
DP26640-00 N8ME DP32640-00 N8LE
DP26640-04 N8MH DP32640-03 N8LH
DP26640-01 N8MF DP32640-01 N8LF
DP26640-02 N8MG
(TABLE *2.0) Main Bd.: "Power ON/OFF SW" Test Points
26" Models 32" Models
DP26640-00 N8ME DP32640-00 N8LE
DP26640-01 N8MF DP32640-01 N8LF
DP26640-02 N8MG DP32640-03 N8LH
DP26640-04 N8MH
(TABLE *3.0) Main Bd.: "BL_ON" Test Points
26" Models 32" Models
DP26640-00 N8ME DP32640-00 N8LE
DP26640-01 N8MF DP32640-01 N8LF
DP26640-02 N8MG DP32640-03 N8LH
DP26640-04 N8MH
3.3 V
12V on Main Bd. Confirmation Voltage
24V on Power Bd. Confirmation Voltage
Main K8C "pin 8" 12 V
n/a n/a
Power Bd. K603 "pin 1" 24 V
Power ON/OFF SW on Main Bd. Confirmation Voltage
Main K8C "pin 1" 5 V
BL_ON Command Confirmation Voltage
Main K8C "pin 13"
Is the 12V supplied from
Power Bd.?
(see TABLE*1.0)
no: 0V
Main Bd. is not working.
Replace "Main Bd."
On Main Bd.
Is 5V supplied to "Power ON/OFF SW"
(see TABLE*2.0)
no: 0V
yes: 5
V
Replace: "Power Bd."
and "Wire Harness"
yes:12
V
Power LED turns ON.
But, LCD Backlight is not ON, or only
turned ON and then back OFF.
no: 0V
yes: 3.3
V
Main Bd. is not working.
Replace "Main Bd."
Inverter Bd. or LCD Panel is not working.
1st: Replace "Inverter Bd."
If Inverter Bd. does not correct problem, then:
2nd: Replace "LCD Panel"
On Main Bd.:
Is the "BL_ON" voltage (3.3V)
supplied from Main Bd.?
(see TABLE*3.0)
Confirm wire harness connection between Main
Bd. & Power Bd., and between Power Bd. and
Inverter Bd.
Is the 24V (if applicable) supplied from
Power Bd. during LED ON time?
(see TABLE*1.1)
Unplug the cable from Power Bd. to
Inverter Bd..
Is the 24V supplied from Power Bd. during
LED on time?
Inverter Bd. is not
working. Replace
"Inverter Bd.".
Power Bd. is not working.
Re
p
lace "Power Bd.".
no: 0V
yes: 24
V
no: 0V
yes: 24V
or
(not applicable)