Panasonic PT-60LCX64-K Service Manual page 121

How to solve the problem indicated by the Error Indication of LED
Error No. Problem
+33V line on the Main C.B.A. error.
9)
10) +9V line on the Main C.B.A. error.
11) +5V line on the Main C.B.A. error.
Possible Solution
Check if there is a voltage of approx.
+30V at Pin 1 of P3401 on the Main
YES
C.B.A. for a moment just after the
power is turned on.
NO
Short-
Disconnect the connector cable from
circuit
P3401 on the Main C.B.A. and check
the resistance between Pin 1 and
Pin 10 of P3401 on the Main C.B.A.
No shortcircuit
Check +33V voltage line on the
Power C.B.A.
Repair if necessary.
(Refer to "CHECKING THE POWER
C.B.A.")
Check if there is a voltage of approx.
+9V at Pin 2 of P3401 on the Main
YES
C.B.A. for a moment just after the
power is turned on.
NO
Short-
Disconnect the connector cable from
circuit
P3401 on the Main C.B.A. and check
the resistance between Pin 2 and
Pin 10 of P3401 on the Main C.B.A.
No shortcircuit Shortcircuit
Check +9V voltage line on the Power
C.B.A.
Repair if necessary.
(Refer to "CHECKING THE POWER
C.B.A.")
Check if there is a voltage of approx.
+5V at Pin 4 of P3401 on the Main
YES
C.B.A. for a moment just after the
power is turned on.
NO
Short-
Disconnect the connector cable from
circuit
P3401 on the Main C.B.A. and check
the resistance between Pin 4 and
Pin 10 of P3401 on the Main C.B.A.
No shortcircuit
Shortcircuit
Check +5V voltage line on the Power
C.B.A.
Repair if necessary.
(Refer to "CHECKING THE POWER
C.B.A.")
Shortcircuit
121
Check the surrounding parts at Pin
61 of IC6302 on the Main C.B.A.
Repair if necessary
Check +33V voltage line on the
Main C.B.A.
Repair if necessary.
Check the surrounding parts at Pin
64 of IC6302 on the Main C.B.A.
Repair if necessary.
Disconnect the Rear Jack C.B.A.,
and check the resistance between
Pin 2 and Pin 10 of P3401 on the
Main C.B.A.
No shortcircuit
Check +9V voltage line on the
Main C.B.A.
Repair if necessary.
Check +9V voltage line on the Rear
Jack C.B.A.
Repair if necessary.
Check the surrounding parts at Pin
63 of IC6302 on the Main C.B.A.
Repair if necessary.
Disconnect the Rear Jack C.B.A. and
the connector cable from P6003 on
the Main C.B.A., and check the
resistance between Pin 4 and Pin 10
of P3401 on the Main C.B.A.
No shortcircuit
Check +5V voltage line on the
Main C.B.A.
Repair if necessary.
Connect the Rear Jack C.B.A. with
the Main C.B.A., and check the
resistance between Pin 4 and Pin 10
of P3401 on the Main C.B.A.
No shortcircuit
Check +5V voltage line on the
Rear Jack C.B.A.
Repair if necessary.
Check +5V voltage line on the Tuner
C.B.A.
Repair if necessary.
PT-60LCX64-K