Panasonic TX-LR32U20 Service Manual ▷ View online
TX-LR32U20
13
6 Troubleshooting Guide
Use the self-check function to test the unit.
1. Checking the IIC bus lines
2. Power LED Blinking timing
2. Power LED Blinking timing
6.1.
Check of the IIC bus lines
6.1.1.
How to access
Self-check indication only:
Produce TV reception screen, and while pressing [VOLUME ( - )] button on the main unit, press [OK] button on the remote control
for more than 3 seconds.
Self-check indication and forced to factory shipment setting:
Produce TV reception screen, and while pressing [VOLUME ( - )] button on the main unit, press [MENU] button on the remote
control for more than 3 seconds.
Produce TV reception screen, and while pressing [VOLUME ( - )] button on the main unit, press [OK] button on the remote control
for more than 3 seconds.
Self-check indication and forced to factory shipment setting:
Produce TV reception screen, and while pressing [VOLUME ( - )] button on the main unit, press [MENU] button on the remote
control for more than 3 seconds.
6.1.2.
Exit
Disconnect the AC cord from wall outlet.
6.1.3.
Screen display
6.1.4.
Check Point
Confirm the following parts if NG was displayed.
TX-LR32U20
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6.2.
Power LED Blinking timing chart
1. Subject
Information of LED Flashing timing chart.
2. Contents
When an abnormality occurs, the protection circuit will operate and reset the unit to stand by mode. During this time, the
defective block can be identified by the number of blinking times of the Power LED on the front panel of the unit as follow:
defective block can be identified by the number of blinking times of the Power LED on the front panel of the unit as follow:
6.3.
No Power
First check point
There are following 2 states of No Power indication by power LED.
There are following 2 states of No Power indication by power LED.
1. No lit
2. Red is lit then turns red blinking a few seconds later. (See 6.2.)
2. Red is lit then turns red blinking a few seconds later. (See 6.2.)
Blinking times
Contents
BOARD
1
Inverter_SOS
P BOARD
2
FAN_SOS
A BOARD
3
SOS
A BOARD
4
DTV_9V
P/A BOARD
5
MAIN_9V
A BOARD
6
SUB_5V
A BOARD
7
SUB_3.3V
A BOARD
8
MAIN_3.3V
A BOARD
9
SOUND_SOS
A BOARD
10
HQ1L_SOS / ZWEI_SOS
A BOARD
13
EMERGENCY SOS
A BOARD
14
Audio PWM SOS
A BOARD
TX-LR32U20
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7 Disassembly and Assembly Instructions
7.1.
AC Cord Dressing
TREATMENT AC CORD.
TX-LR32U20
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7.2.
AC Cord Installation
1. Put on the AC CORD BRACKET on the CABINET.
2. Fix the AC CORD BRACKET with SCREW.
3. Insert AC CORD connector into P-PCB connector.
4. Clamp the AC CORD.
5. Insert AC CORD bushing into the AC CORD BRACKET.
6. AC CORD is pushed into the bottom of the bracket.
2. Fix the AC CORD BRACKET with SCREW.
3. Insert AC CORD connector into P-PCB connector.
4. Clamp the AC CORD.
5. Insert AC CORD bushing into the AC CORD BRACKET.
6. AC CORD is pushed into the bottom of the bracket.
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