DT+9V line error.
Communication error between Peaks (IC8001) and
TV microcontroller (IC6004) on the Main P.C.B.
SUB+5V line error.
MAIN+3.3V line error.
LCD+17V line error.
AUDIO AMP (IC4501) failure
Communication error between Peaks (IC8001) and
TV microcontroller (IC6004) on the Main P.C.B.
Problem
Possible Solution
How to solve problems indicated by the Error Indication
(The symptom of all errors is that the Lamp goes off)
Note: Before performing troubleshooting, confirm that all connector cables in the unit are connected correctly.
The following voltage lines on the Main P.C.B. is over
current.
• SUB+5V line
• SUB+1.8V line
• SUB+3.3V line
• SUB+1.2V line
The following voltage lines on the Main P.C.B. is over
voltage.
• SUB+5V line
• SUB+1.8V line
• SUB+3.3V line
• SUB+1.2V line
[POWER Indicator one blink]
[POWER Indicator two blinks]
[POWER Indicator three blinks]
[POWER Indicator four blinks]
[POWER Indicator six blinks]
[POWER Indicator seven blinks]
[POWER Indicator nine blinks]
POWER
Indicator
1
2
3
4
6
7
9
1. Check the following parts of the SUB+5V line on the Main P.C.B.,
and replace if necessary.
• R6134, IC1107, IC6004, and the surrounding parts.
1. Check the following parts of the MAIN+3.3V line on the Main P.C.B.,
and replace if necessary.
• R6106, IC1104, IC6004, Q1104-Q1106, and the surrounding parts.
1. Check the voltage at Pin 5 of IC4501 on the Main P.C.B.
If +3.3V(High), replace IC4501.
If 0V(Low), check the following parts of the SOUND SOS line between Pin 5 of IC4501
and Pin 72 of IC6004 on the Main P.C.B., and replace if necessary.
• Q4502, IC6004, and the surrounding parts.
1. Check the following parts of the PANEL SOS(L) line between Pin L16 of IC8001
and Pin 48 of IC6004 on the Main P.C.B., and replace if necessary.
• IC8001, IC6004, and the surrounding parts.
1. Check the following parts of the PANEL STATUS (SOS(L)) line between Pin G1 of
IC8001 and Pin 13 of IC6004 on the Main P.C.B., and replace if necessary.
• IC8001, IC6004, and the surrounding parts.
[POWER Indicator ten blinks]
10
1. Check the Power P.C.B.
(Refer to "CHECKING THE POWER P.C.B.")
2. Check the following parts of the LCD+17V line on the Main P.C.B. and replace if necessary.
• R6184, IC6004, and the surrounding parts.
1. Check the Power P.C.B.
(Refer to "CHECKING THE POWER P.C.B.")
2. If still NG, check DC/DC circuit on the Main P.C.B.
(Refer to "CHECKING THE OPT/TV UNIT (Main P.C.B.).")
1. Check that Connector CN1102 (Thermal Fuse) on the Main P.C.B. is connected firmly.
2. If still NG, check the Power P.C.B.
(Refer to "CHECKING THE POWER P.C.B.")
3. If still NG, check the following parts of DT+9V line on the Main P.C.B.,
and replace if necessary.
• R6011, IC6004, and the surrounding parts.
PT-56LCX70 / PT-61LCX70 / PT-50LCX7 / PT-56LCX7 / PT-61LCX7
18
