DOWNLOAD LG 42PQ301R-ZB (CHASSIS:PP91B) Service Manual ↓ Size: 11.25 MB | Pages: 70 in PDF or view online for FREE

◆ MENU 

Æ SETUP Æ Diagnostics

1. Check whether Signal Strength, Signal Quality is over 50% or not.
2. If Signal Strength, Signal Quality is under 50%,install the Booster to increase signal level.

Pin Map

Power B/D↔Main B/D

(P813)          (P1100)

7

6

5

4

3

2

1

No.

Mechanical switch on

Low 

(GND Value)

KEY-ON

High(3.3V~5V)

RL_ON

High(3.3V~5V)

AC DET

5V

STBY 5V

Check the other pin’s output

High(3.3V~5V)

Vs-ON

High(3.3V~5V)

M5V_ON

Remark

Spec

Checking 

Point

① Check soldering status on each major component.

② Check there is problem on major component  or not by eye.

(CONDENSER, FET, IC, Resistor) 

③ Check FUSE.

④ Check 5V,Va,Vs voltage

※ PSU Maker: 1)LG IT   2)Sanken   3)Lite-On

※ If  happen Power board Protection,

check whether there is Short or Open on Y-SUS, Z-SUS B/D or not.

▣ Checking Method

M5V

9

NC

3

VS

2

VS

1

Va

6

GND

5

GND

4

M5V

10

GND

8

Va

7

P811

Pin

Power B/D↔ Y-Sus B/D

◆ Check 5V,Va,Vs voltage

→ For Voltage specification,

refer to the PDP Module Label.

Fuse

◆ Adjust Va,Vs voltage.

Vs adjust

Va adjust

▣ Check Power off History by using SVC Remocon

Press “In-start” →Press” 0000” → Select “Power Off History” → Pop up Module Rom ver.

Appear Power off history 5ea.

(1 is the latest history)

In case that there is no signal for 15minutes

After turn on by OnTimer, There is no operation for 2hours

Mechanical power switch off

Power off by Remote control