Adjustment Instruction

1. Application Range

This spec. sheet is applied to all of the LD89F chassis manufactured at LG TV Plant all over the world.

2.Specification

2.1Because this is not a hot chassis, it is not necessary to use an isolation transformer. However, the use of isolation transformer will help protect test instrument.

2.2Adjustment must be done in the correct order.

2.3The adjustment must be performed in the circumstance of 25±5°C of temperature and 65±10% of relative humidity if there is no specific designation.

2.4The input voltage of the receiver must keep 100~240V, 50/60Hz.

2.5The receiver must be operated for about 15 minutes prior to the adjustment.

-After RGB Full White in HEAT-RUN Mode, the receiver must be operated prior to the adjustment.

-Enter into HEAT-RUN MODE

(1)Press the "POWER ON" KEY on Adjustment R/C.

(2)Press the "ADJ KEY" on Adjustment R/C.

(3)Select "3. Test Pattern" by using D/E(CH +/-) and press ENTER(V)

(4)Select "White" by using F/G(VOL +/-) and press

ENTER(V)

•Set is activated HEAT run without signal generator in this mode.

•Single color pattern ( RED / BLUE / GREEN ) of HEAT RUN MODE uses to check panel.

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

3. PCB assembly adjustment method

=> Caution: Using ‘power on’ button of the Adjustment R/C , power on TV.

• ADC Calibration Protocol (RS232)

NO	Item	CMD 1	CMD 2	Data 0

Enter	Adjust ‘Mode In’	A	D	0	0	When transfer the 'Mode In'
Adjust MODE						Carry the command.

ADC adjust	ADC Adjust	A	D	1	0	Automatically adjustment
						(The use of a internal pattern)

	Adjust ‘Mode Out’	A	D	9	0

	Adjustment	A	D	9	9	To check ADC Adjustment
	Confirmation					on Assembly line.

-Baud rate : 115200 bps

-RS232 Host : PC

-echo : none

4. ADC adjustment

RF input	AV / Component / RGB input

NO SIGNAL or White noise	NO SIGNAL

•Adjustment can be done using only internal ADC, so input signal is not necessary.

•Required equipment : Adjustment R/C.

1)Press ADJ key on adjustment R/C.

2)Select "1. ADC calibration" by using D/E(CH +/-) and press ENTER(V)

3)Select "Start" by using F/G(VOL +/-) and press ENTER(V)

4)ADC adjustment is executed automatically

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Only for training and service purposes

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