Repair Flow Chart: Trouble Condition
page 4
Power LED turns OFF within 10 sec of Power ON.
(TABLE *1) Main Bd.: "Power ON/OFF SW" Test Points
or
or
(TABLE *2) Main Bd.: 12V & 24V Test Points
or
or
or
or
US1K 42", 46"
Main K8B "12pin"
Main L1613
42"(00 ver) = 24V, 42"(01 ver) = 15V, 46" = 16V
US1J 26", 32"
Main K8B "12pin"
Main L1712
24 V
Model
24V on Main Bd.
Confirmation Voltage
Confirmation Voltage
12 V
12V on Main Bd.
12 V
US1K 42", 46"
Main K8B "8pin"
Main L1604
Confirmation Voltage
5V
5V
US1J 26", 32"
Main K8B "8pin"
Main L1604
Model
US1K 42", 46"
Main K8B "1pin"
Main R1600
Model
12V on Main Bd.
US1J 26", 32"
Main K8B "1pin"
Main R1702
On Main Bd.:
Is 5V supplied to "Power_SW"
during LED ON time?
(see TABLE*1)
no: 0V
Main Bd. Is not working.
Replace "
Main Bd.
"
yes
no: 0V
yes
no
Pwer Bd. is not working.
Replace "
Power
Bd
." and
"
Wire Harness
".
Inverter Bd. Is not working.
Replace "
Inverter Bd.
"
Are 12V and 24V supplied
from Pwer Bd. during LED ON
time?
(see TABLE*2)
Unplug cable from Power Bd. to
Inverter Bd.:
Is this symptom changed?
yes
Power LED turns OFF within
10 sec of Power ON.
No.
T. Cnt. Bd. is not working.
Replace "
T. Cnt. Bd.
"
Unplug cable from Main Bd. to
T. Cnt. Bd.:
Is this symptom changed?
yes
Main Bd. is not working.
Replace "
Main Bd.
"
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