LG 32LN549E / 32LP620H (CHASSIS:LB3AZ) Service Manual ▷ View online
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f. Vendor Specific(HDMI)
- FHD
- HD
4.5. Outgoing condition Configuration
■ When pressing IN-STOP key by Service remote control,
Red LED are blinked alternatively. And then automatically
turn off. (Must not AC power OFF during blinking)
4.6. HI-POT Test
4.6.1. HI-POT auto-check preparation
- Check the POWER cable and SIGNAL cable insertion condition
4.6.2. HI-POT auto-check
(1) Pallet moves in the station. (POWER CORD / AV CORD is
tightly inserted)
(2) Connect the AV JACK Tester.
(3) Controller (GWS103-4) on.
(4) HI-POT test (Auto)
- If Test is failed, Buzzer operates.
- If Test is passed, GOOD Lamp on and move to next proc-
ess automatically.
4.6.3. Checkpoint
(1) Test voltage
- Touchable Metal : 3 KV / min at 100 mA
- SIGNAL : 3 KV / min at 100 mA
(2) TEST time: 1 second. (case : mass production )
(3) TEST POINT
- Touchable Metal => LIVE & NEUTRAL : Touchable Metal.
- SIGNAL => LIVE & NEUTRAL : SIGNAL.
5. Model name & Serial number D/L
▪ Press "Power on" key of service remote control.
(Baud rate : 115200 bps)
▪ Connect RS232 Signal Cable to RS-232 Jack.
▪ Write Serial number by use RS-232.
▪ Must check the serial number at the Diagnostics of SET UP
menu. (Refer to below)
5.1. Signal Table
CMD : A0h
LENGTH : 85~94h (1~16 bytes)
ADH : EEPROM Sub Address high (00~1F)
ADL : EEPROM Sub Address low (00~FF)
Data : Write data
CS : CMD + LENGTH + ADH + ADL + Data_1 +...+ Data_n
Delay : 20ms
5.2. Comand Set
* Description
FOS Default write : <7mode data> write
Vtotal, V_Frequency, Sync_Polarity, Htotal, Hstart, Vstart, 0,
Phase
Data write : Model Name and Serial Number write in EEPROM,.
5.3. Method & notice
(1) Serial number D/L is using of scan equipment.
(2) Setting of scan equipment operated by Manufacturing
Technology Group.
(3) Serial number D/L must be conformed when it is produced
in production line, because serial number D/L is mandatory
by D-book 4.0.
* 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 "5.Model Number D/L" like below photo.
3) Input the Factory model name or Serial number like
photo.
Input
Model name(HEX)
HDMI1
67030C001000B82D
HDMI2
67030C002000B82D
HDMI3
67030C003000B82D
Input
Model name(HEX)
HDMI1
65030C001000011D
HDMI2
65030C002000011D
HDMI3
65030C003000011D
CMD
LENGTH
ADH
ADL
DATA_1
. . .
Data_n
CS
DELAY
Adjust mode
CMD(hex)
LENGTH(hex)
Description
EEPROM WRITE
A0h
84h+n
n-bytes Write (n = 1~16)
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4) Check the model name Instart menu. → Factory name
displayed. (ex 42LD450-ZA)
5) Check the Diagnostics.(DTV country only) → Buyer
model displayed.(ex 42LD450)
6. Check Commercial features
6.1. External SPK Out and Volume control
(1) Connect external speaker to speaker out port with phone
jack on TV side as below.
(2) Check the Max. speaker output is 1W or not. Sine wave
with 1KHz will be displayed.
(3) Press Vol. control button up/down in turns and check the
waveform of Oscilloscope.
6.2. IR Out and DC Power Outlet(5V/12V)
6.2.1. In using Commercial Check Jig
(1) Connect JIG for inspection to RS-232C port on TV as
below.
DC 5V Power must be supplied to JIG through AC Power
Adapter at 3.
(2) Check the LED for IR-Out inspection.
* Please refer to the criteria of Judgement.
6.2.2. In using Mini check Jig
(1) Connect JIG for inspection to RS-232C port on TV as
below.
(2) Enter the Configuration Setup mode in pressing Remote
control keys.
The method to enter Configuration Setup mode
: IN-START → MENU → Configuration Setup → OK
1) Select 5V DC Power Outlet and change the setting : No
→ Yes. After that, check LED color in JIG.
2) After checking 5V DC Power Outlet, change the setting :
Yes → No.
3) Please check 12V DC Power Outlet in the same
procedure.
(3) Check the LED for IR-Out inspection.
* Please refer to the criteria of Judgement.
Vol. control for External SPK
External SPK
Button of Vol. control
Waveform of Oscilloscope
UP(+)
DOWN(-)
Recommended Input Signal
: RF, 1kHz, Sine wave
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TROUBLESHOOTING GUIDE
1. Check the booting Voltage
Make sure the Stand-by Voltage.
P401 3, 5pin : +3.5V_ST
Make sure the Micom voltage.
L301 : +3.5V_ST
Make sure the output of MSTAR
LVDS.
Make sure the Multi Voltage.
P401 9, 10pin : 24V, 13~15pin : 12V
Make sure the CLK of X300
Is 10MHz.
Make sure the CLK of X300 is
10MHz.
Exchange the LCD Module.
Make sure the Output Voltage of IC
402/3/7.
IC402 : 2.5V, IC403: 1.1V, IC407 :
1.5V, Q403 : 3.3V
Push Micom Reset(SW300) and
make sure the PWR_ON
P401 1pin : 3.3V
Make sure the voltage of LVDS
Power.
Q409 : 12V
Make sure the Power
Connector.
Exchange the L301.
Exchange the Mstar(IC101
or Main board.
Exchange the circuit
board.
Exchange the X300.
Exchange the circuit or
check the LCD module.
Exchange the
IC402/3/7, Q403.
Re-download of
Firmware.
Exchange the Q409.
Make sure the disconnection of
Main board 3.5V circuit.
Exchange the Mstar(IC101)
Or Main board
Exchange the
Circuit board.
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
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2. Digital TV Video
3. Analog TV Video
Check the Stand-by Voltage
P401 3, 5pin : +3.5V_ST
Check the RF cable and RF signal.
Check the Tuner 3.3V
; L2606
Check the Tuner 3.3V
; L2606
Check the LVDS output signal of
Mstar IC.
Check the LVDS output signal of
Mstar IC.
Check the Tuner 1.8V.
IC2603 2pin : 1.8V
Check the Tuner 1.8V.
IC2603 2pin : 1.8V
Check the IF_P/N signal
TU2601~3 10/11pin
Check the CVBS signal
TU2601~3 8pin
Exchange the L2606.
Exchange the L2606.
Exchange the Mstar(IC101)
or Main board.
Exchange the Mstar(IC101)
or Main board.
Exchange the IC2603.
Exchange the IC2603.
Exchange the Tuner.
Exchange the Tuner.
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
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