DOWNLOAD LG 42LG500H (CHASSIS:LA66A) Service Manual ↓ Size: 10.72 MB | Pages: 41 in PDF or view online for FREE

Model
42LG500H (CHASSIS:LA66A)
Pages
41
Size
10.72 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
42lg500h-chassis-la66a.pdf
Date

LG 42LG500H (CHASSIS:LA66A) Service Manual ▷ View online

- 17 -
9.2. Lodgenet Card & Auto Camport Check
9.3. RJP(Remote Jack Pack) Check
(1) Check Order 'Pass' Judgment
1) Connecting RJP Test JIG & RJP Port of Set with Modem
Cable(8Pin)
2) Check the RJP operation on OSD(In-start -> RJP Pin
Check -> 
G
3) 'SUCCESS! PIN CONNECTION OK' -> PASS
4) 'Pin Check Fail!!!!' -> NG
5) If the Result is 'NG', try One More
(2) Needs JIG & Equip. & Cable
1) RJP Check JIG, Modem Cable (8 Pin)
9.4. MPI Card Check
10. Input the Shipping Option Data
1) Push the ADJ key in an Adjust Remote controller.
2) Input the Option Number that was specified in the BOM,
into the Shipping area.
3) The work is finished, Push 
A
Key.
- 18 -
TROUBLESHOOTING
CURRENT PROBE : P6022A or same product
4.6 k‰ / 500 W
SC100
P203
P202
P401
400PF
3.15KV
400PF
3.15KV
P402
INPUT CONTROL SIGNAL
BURST DIMMING SIGNAL
INVERTER + POWER BOARD
VOLTAGE PROBE P6015A
or same product
VOLTAGE PROBE P6015A
or same product
INVERTER
CONNECTION
WIRE
INVERTER
TRANSFORMER
ON/OFF : 5V
SELECT
180Hz : 5V
150Hz : 0V
SYNC
180Hz, 3.3V, 50% Duty
150Hz, 3.3V, 50% Duty
INV_CTRL :5V
3.4V_ON : 5V
BURST_DIM
0-3.3V
A_DIM
0-1.65V
P201
AC INPUT
4.6 k‰ / 500 W
<Power board structure>
- 19 -
1. No Power
(1) Symptom
1) Does not  minute discharge at module. 
2) Non does not come into the front LED. 
(2) Procedure check
Is plug in power cord?
Plug in power cord.
Yes
No
Is connect the Line Filter and
Power Board Cable?
Connect Cable.
Yes
No
Is Normal the Fuse(F100) on
Power Board?
Replace Fuse.
Yes
No
Is connect the Power Board and
13P cable of Main Board?
Connect Cable.
Yes
No
After remove the cable connect to Power Board(except the SC100
connection cable), authorizes the AC Voltage marking on manual.  When
ST-BY 5V does not operate, replace Power Board.
- 20 -
Does minute discharge
At Module?
Is the LVDS 
cable normal?
Is the IC1111 output
normal?
Check the LCD Module
Yes
No
YES
Yes
Reconnect the LVDS
cable in P600.
No
Is the IC506 (FLI8662)
Output normal?
Replace the main
board
No
Yes
Is the LED change when 
Push remote-control?
Replace the IR board
No
NO
Replace the 
Power board.
Is output the normality
Low/High voltage except
stand-by 5V?
NO
2. No Raster
(1) Symptom
1) No OSD and image occur at screen.
2) It maintains the condition where the front LED is Blue
(2) Procedure check
3. In case of occurring strange screen into specific mode
(1) Symptom
The screen does not become the display from specific input mode.
(RF, AV, Component, RGB, DVI).
(2) Check following
- Check the all input mode should become normality display.
- Check the Video(Main)/Data(Sub), Video(Main)/Video(Sub) should become normality display from the PIP mode or DW mode.
(Re-Check it Swap) 
(3)  In case of becomes unusual display from RF mode
Is normal the Tuner?
Is normal the
FIL8662?
Check the tuner cable.
* Isn’t cable has broken?
* Is the cable connected 
well from MPI card to tuner?
Cable inserts well.
Yes
No
No
Replace Tuner
No
Is normal the Input voltage, IIC
Communication and CVBS output?
Yes
Is normal the Input voltage, IIC
Communication and HV sync?
No
Replace IC or Main Board
No
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