Sanyo DP32640 Troubleshooting Manual page 5

Repair Flow Chart: Trouble Condition
Power LED turns OFF within 10 sec of Power ON, or LED cycles ON & OFF.
Power LED turns OFF within
10 sec of Power ON, or cycles ON & OFF.
On Main Bd.:
Is 5V supplied to "Power_SW"
during LED ON time?
(see TABLE*1.0)
yes
Unplug cable from Main Bd
to T.Cnt. Bd..
Is symptom changed?
no
Is the 12V supplied from Power
Bd. during LED ON time?
(see TABLE*2.0)
yes:
Is the 24V (if applicable) supplied
from Power Bd. to Inverter Bd.
during the LED ON time?
(see table *2.1)
yes: 24V,
or
(not applicable)
Main Bd. is not working.
Replace "Main Bd."
(TABLE *1.0) Main Bd.: "Power ON/OFF SW" Test Points
26" Models 32" Models
DP26640-00 N8ME DP32640-00
DP26640-01 N8MF DP32640-01
DP26640-02 N8MG DP32640-03
DP26640-04 N8MH
(TABLE *2.0) 12V Test Points
26" Models 32" Models
DP26640-00 N8ME DP32640-00
DP26640-01 N8MF DP32640-01
DP26640-02 N8MG DP32640-03
DP26640-04 N8MH
(TABLE *2.1) 24V Test Points
26" Models 32" Models
DP26640-00 N8ME DP32640-00
DP26640-04 N8MH DP32640-03
DP26640-01 N8MF DP32640-01
DP26640-02 N8MG
no: 0V
Main Bd. is not working.
Replace "Main Bd."
yes
T Con Bd. is not working. Main Bd.
may also not be working.
Replace "T Con Bd. & Main Bd."
no: 0V
Unplug pin (#8 & #9) wires from
K8C connector. Is the 12V
supplied from Power Bd. (#8 &
#9) during LED ON time?
no: 0V
Power Bd. is not working.
Replace " Power Bd."
no: 0V
Unplug the cable from Power Bd. to
Inverter Bd.
Is the 24V supplied from Power Bd. during
LED on time?
(see table *2.1)
no: 0V
Power Bd. is not working.
Replace "Power Bd."
5V on Main Bd.
Main K8C "pin 1"
N8LE
N8LF
N8LH
12V on Main Bd.
Main K8C "pin 8"
N8LE
N8LF
N8LH
24V on Power Bd.
N8LE
N8LH
Power Bd. K603 "pin 1"
N8LF
yes: 12V
Main Bd. is not working.
Replace "Main Bd.".
yes: 24V
Inverter Bd. is not working.
Replace "Inverter Bd."
Confirmation Voltage
Confirmation Voltage
Confirmation Voltage
n/a
page 4
5 V
12 V
n/a
24 V