LG 42PJ150 - Plasma TV - Adjustments - How to adjust Va and VS voltages at Power Supply

LG 42PJ150 - LG 42PJ150-ZE – Plasma TV - Adjustments - Audio output schematic

North/Latin America - Europe/Africa - Asia/Oceania

(1) The adjustment is according to the order which is designated and which must be followed, according to the plan which can be changed only on agreeing.
(2) If there is no specific designation, the adjustment must be performed in the circumstance of 25 °C ± 5 °C of temperature and 65 % ± 10 % of relative humidity.
(3) The input voltage of the set must keep 100 V ~ 240 V, 50 / 60 Hz.
(4) Input signal Unit: Product Specification Standard.
(5) The set must be operated for about 5 minutes prior to the adjustment.

After turning on RGB Full Window pattern in HEAT-RUN Mode, the receiver must be operated.
Enter into HEAT-RUN MODE
1) Press the ‘POWER ON’ button on R/C for adjustment.
2) Press the ‘ADJ’ button on R/C and enter EZ ADJUST Select “7. Test Pattern” by using Up/Dn (CH +/-) and press ENTER.

Select “White” by using Right / Left (VOL +/-) and press ENTER.

Set heat run should be activated without a signal generator.
Single color patterns (RED / BLUE / GREEN) of HEAT RUN MODE are used to check a plasma panel.

Caution: If you turn on a still screen more than 20 minutes (Especially digital pattern, cross hatch pattern), an after image may be made in the black level part of the screen.

Use ‘power on’ button of a service R/C to power on TV set.
Do not connect any external input cable if there is no any specifics.

Update S/W using Auto Download through the USB

Caution: S/W version of USB file (xxx.epk) must be bigger than one which is downloaded previously.

(1) Insert the USB stick to the USB socket.

(2) A downloaded file in USB stick will be detected automatically.

(3) If S/W version of USB file (xxx.epk) is bigger than one which is downloaded previously, the message, “Copying files from memory”, will appear.

(4) If an update procedure was completed, TV set will be turned off and on automatically.

(5) If TV set is turned on, check an updated version.

* If a downloaded version is bigger than one of which TV set had, TV set can lost channel data. In this case, you have to scan channels again.

After Downloading S/W, Adjust

TOOL OPTION

(1) Push “IN-START” button on a service R/C.

(2) Select “Tool Option 1” and Push “OK” button.

(3) Put the number of a below table in order of a suffix of the “Tool Option(X)”.  (Each model has a different number.)

POWER Supply Unit PCB Ass’y Va/Vs Voltage Adjustment

(Both Vs and Va voltage adjustment are necessary.)

Va/Vs Adjustment Procedure

(1) Connect positive(+) terminal of DMM to Vs/Va pin, connect negative(-) terminal to GND.

(2) Turning ‘Vs/Va Adjust’ and adjust Vs/Va voltages to a value which is written on a right/top label of a module.  (deviation ; ±0.5V)

[Caution]

Each Power Supply Unit PCB assembly must be checked by check JIG set. (Because power PCB Ass’y damages to PDP Module, especially be careful)

Set up “RF mode(noise)” before a voltage adjustment.

Test equipment: DMM 1EA

PCMCIA CARD Check

You must adjust DTV 29 Channel and insert PCMCIA CARD to socket.

If PCMCIA CARD works normally, video signals will appear on screen.

But it works abnormally, “No CA module” will appear on screen.

[ Caution: Set up “RF mode” before launching products.]

White Balance Adjustment

Caution: Press the POWER ON KEY on R/C before W/B adjustment.

Test Equipment

Color Analyzer (CS-1000, CA-100+(CH.10), CA-210(CH.10))

Adjust CA-100+ / CA-210 by CS-1000 before measuring

You should use Channel 10 which is Matrix compensated (White, Red, Green, Blue revised) by CS-1000 and adjust in accordance with White balance adjustment coordinate.

Manual W/B Adjustment

(1) Execute the zero calibration of CA-100+ / CA-210.

(2) Press the ‘ADJ’ button on a service R/C and enter EZ ASJUST by selecting ‘6. White Balance’.

(3) Then, 216 gray pattern will appear on the screen.

(4) Change the R/G/B-Gain as passing in 3 color coordinates and temperatures, COOL, MEDIUM and WARM.

< Temperature: COOL >

- R-Cut / G-Cut / B-Cut is set to 64

- Control R-Gain and G-Gain.

- Each gain is limited to 192

< Temperature: MEDIUM >

- R-Cut / G-Cut / B-Cut is set to 64

- Control R-Gain and G-Gain.

- Each gain is limited to 192

< Temperature: WARM >

- R-Cut / G-Cut / B-Cut is set to 64

- Control G-Gain and B-Gain.

- Each gain is limited to 192

(5) Press ‘EXIT’ button on a service R/C.

Serial Number Download

Download Procedure

(1) Press “Power on” button of a service R/C.(Baud rate : 115200 bps)

(2) Connect RS232-C Signal Cable.

(3) Write Serial number through RS-232C.

(4) Check the serial number at the Diagnostics of ‘SETUP’menu.

[Don’t download HDMI/RGB EEPROM to write a model name. Model name dois unnecessary because this model use ‘Tool Option’ to call a model name.]

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.

ComFOS 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,mand Set.

Audio output schematic

CI+ Key Download

Download Procedure
(1) Press "Power on" button of a service R/C.(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.

Check Information (Serial No. & Model name)
(1) Push the menu button in DTV mode.
(2) Select the SETUP => Diagnostics => To set
(3) Check the Serial Number.