Panasonic PT-44LCX65-K, Service Manual, Page: 114 / 236

CHECKING THE BALLAST C.B.A.
OK
OK
NG
OK
NG
NG
Check the resistance of the Thermal Fuse Unit (F001)
on the Lamp House.
Ensure there is no crack on the bulb of the Lamp.
Wait for at least 5 minutes after disconnecting AC plug.
Disconnect all connector cables on the Ballast C.B.A., then
take out the Ballast C.B.A.
Remove the Shield Case (the Ballast Shield Case Top, and
the Ballast Shield Case Bottom) of the Ballast C.B.A.
Refer to Figure 2.
Check if the voltage is 0 V between ) and TP1302(-). Discharge ) and TP1302(-) at a resistance of
approx. 100 /5 W for about 3 seconds.
Replace the Lamp.
Replace the Thermal Fuse Unit (F001).
Check the following parts on the Ballast P.C.B. with the Tester.
Reconnect all connector cable on the Ballast P.C.B. except the Lamp Connector.
Refer to Ballast C.B.A. Service Position, Figure 3.
Replace any defective parts.
F1301, F1302 (Thermal Fuse), D1302, D1308, Q1304, Q1306, Q1307, Q1308, Q1309, Q1310, D1305, D1311, D1313, D1318,
D1303, D1304, D1315, D1309, D1310, Q1301, Q1302, Q1305, IC1303, IC1304, IC1302
OK NG
CAUTION:
Do not remove the Shield Case of the Ballast C.B.A. for
at least 5 minutes after disconnecting AC plug to
reduce the risk of electric shock.
CAUTION:
Do not touch any parts for at least 5 minutes after disconnecting AC plug to reduce the risk of electric shock.
Before checking parts, confirm that the voltage between TP1301 and TP1302 is 0 V.
If not, discharge TP1301 and TP1302 at a resistance of approx. 100 /5 W for about 3 seconds.
bulb of Lamp
A
Note:
When servicing the Ballast C.B.A., do not turn the
Variable resistor (R1321) on the Ballast C.B.A.
PT-44LCX65-K / PT-52LCX65-K / PT-61LCX65-K
114