DOWNLOAD LG 32CS669C (CHASSIS:LD0AW) Service Manual ↓ Size: 5.57 MB | Pages: 41 in PDF or view online for FREE

* Manual Download (Model Name and Serial Number)

If the TV set is downloaded by OTA or Service man, sometimes
model name or serial number is initialized.(Not always)
There is impossible to download by bar code scan, so It need
Manual download.
1) Press the ‘Instart’ key of Adjustment remote control.
2) Go to the menu ‘6.Model Number D/L’ like below photo.
3) Input the Factory model name(ex 32LV3400-ZG) or Serial

number like photo.

4) Check the model name Instart menu. -> Factory name

displayed. (ex 32LV3400-ZG)

5) Check the Diagnostics. (DTV country only) -> Buyer model

displayed. (ex 32LV3400)

(1) Download Procedure

1) Press “Power on” key of a service remote control.

(Baud rate : 115200 bps)

2) Connect RS232-C Signal Cable.
3) Write CI+ Key through RS-232-C.
4) Check whether the key was downloaded or not at ‘In

Start’ menu. (Refer to below.)

=> Check the Download to CI+ Key value in LGset. 

(1) Check the method of CI+ Key value.

a. Check the method on Instart menu.

b. Check the method of RS232C Command.

1) Into the main assembly mode (RS232 : aa 00 00)

2) Check the key download for transmitted command.

(RS232 : ci 00 10)

3) Result value

- normally status for download : OKx
- abnormally status for download : NGx

(2) Check the method of CI+ Key value.(RS232)

1) Into the main ass’y mode (RS232 : aa 00 00)

2) Check the method of CI+ key by command

(RS232 : ci 00 20)

3) Result value

i 01 OK 1d1852d21c1ed5dcx

- 13 -

CMD 1

CMD 2

Data 0

A

A

0

0 

CMD 1

CMD 2

Data 0

C

I

1

0 

CMD 1

CMD 2

Data 0

A

A

0

0 

CMD 1

CMD 2

Data 0

C

I

2

0 

CI+ key Value

- 14 -

Check stand-by Voltage.

P403 9~12pin : +3.5V_ST

Check Power connector.

Main B/D 3.5V Line

Short Check

Check X201 clock.

24 MHz

Replace X201.

Check P403 PWR_ON.

1pin : 3.3V

Replace Mstar(IC101) or Main board.

Check Multi Voltage.

P403 2pin:24V,  17pin:12V

Replace Power Board.

Check Inverter Control & Error Out.  

P403 18 pin : High

P403 24 pin : low

Check Power Board or Module.

Check IC402/3/7 Output Voltage.

IC402 : 2.5V
IC403 : 1.1V
IC407 : 1.5V

Q403 : 3.3V

Replace IC402/3/7, Q403.

Re-download software.

Check Micom Voltage.

L404 : +3.5V

Replace L404.

Check LVDS Power Voltage.

Q409 : 12V

Replace Q409.

Check Mstar LVDS Output

Replace Mstar(IC101) or Main Board.

Change Module.

ok

ok

ok

ok

ok

ok

ok

ok

ok

No

No

No

No

No

No

No

No

No

No

ok

Replace Power board.

ok

- 15 -

Check RF Cable & Signal

Check Tuner 3.3V Power

L3703

Replace L3703.

Check Tuner 1.8V Power 

IC3703  2 pin : 1.8V

Check IF_P/N Signal

TU3700 10/11  Pin

Replace IC3703. 

Check Mstar LVDS Output.

Replace Mstar(IC101) o r Main Board.

ok

ok

ok

ok

No

No

No

No

Bad Tuner. Replace T uner.

Check RF Cable & Signal.

Check Tuner 3.3V Power.

L3703

Replace L3703.

Check Tuner 1.8V Power.

IC3703 2 pin : 1.8V

Check CVBS Signal.

TU3700 8 Pin

Replace IC3703.

Check Mstar LVDS Output.

Replace Mstar(IC101) or Main Board.

ok

ok

ok

ok

No

No

No

No

Bad Tuner. Replace Tuner.

- 16 -

Check input signal format.

Is it supported?

Check AV Cable for damage

for damage or open conductor.

Check JK1604

CVBS Signal  Line

R246.

ok

ok

ok

No

Replace Jack.

ok

Check CVBS_DET Signal.

Replace R1666. 

 

No

Check Mstar LVDS Output.

Replace Mstar(IC101) or Main Board.

No

Check input signal format.

Is it supported?

Check Component Cable

for damage or open conductor.

Check JK1601 or 1603

Y/PB/ PR signal Line.

ok

ok

ok

No

Replace Jack.

Check COMP_DET Signal.

Replace  R1615. 

 

No

Check Mstar LVDS Output.

Replace Mstar(IC101) o r Main Board.

ok

No