Read LG 42LC55 (CHASSIS:LD73A) Service Manual online
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ADJUSTMENT INSTRUCTION
1. Application Range
This spec. sheet is applied to all of the LD73A chassis
manufactured at LG TV Plant all over the world.
manufactured at LG TV Plant all over the world.
2. Specification.
2.1 Because this is not a hot chassis, it is not necessary to
use an isolation transformer. However, the use of isolation
transformer will help to protect test instruments.
transformer will help to protect test instruments.
2.2 Adjustment must be done in the correct sequence.
2.3 The adjustment must be performed at 25±5°C emperature
2.3 The adjustment must be performed at 25±5°C emperature
and 65±10% relative humidity if there is no specified
designation.
designation.
2.4 The input voltage of the receiver must be kept between
100~220V, 50/60Hz.
2.5 Before adjustment, execute Heat-Run for 30 minutes at
RF no signal.
3. Channel Memory
3.1 Setting up the LGIDS
1) Install the LGIDS.
2) After installation, restart your PC.
3) Extract [files.zip] to folder [c:\LGIDS\files].
4) Start LGIDS.
2) After installation, restart your PC.
3) Extract [files.zip] to folder [c:\LGIDS\files].
4) Start LGIDS.
3.2 Channel memory method
1) Press TILT key in Adjust remocon(Automatic setting).
2) Setting up like bottom figure.
2) Setting up like bottom figure.
{Confirmation: Press ADJ Key in the Adjust remocon.
Select “System Control2” by using
D/E (CH+/-) key, and
press Á
(ENTER) RS-232 Host:Gprobe, Baud
Rate:115200bps, Download:Cortez}
3) Connect RS232 cable (Use the general RS-232C
Twisted Serial Cable).
4) Operate LGIDS.
5) Select “Hurricane” and “ALL” on Model dialog and check
5) Select “Hurricane” and “ALL” on Model dialog and check
your connection in Communication dialog.
(If your connection is ‘NG’, then set your
PORT(COM1,2,3,…) correctly. If your connection has
PORT(COM1,2,3,…) correctly. If your connection has
completed, you can see
6) Select proper CH_memory file(*.nvm) for each model at
[Channel Download] [Write Batch].
Next, select proper binary file(*.bin) including the CH
information for each model at [Channel Download] =>
[NVRAM File].
[NVRAM File].
7) Click the [Download] button.
It means the completion of the CH memory download if all
It means the completion of the CH memory download if all
items show 'OK' and Status is changed by 'PASS' at the
lower right corner of the window
lower right corner of the window
4. ADC Calibration
=> Caution: - System control RS-232 Host should be “PC” for
adjustment.
- Before AV ADC Calibration, execute the
“Module selection”
4.1 Adjustment of RF / AV / S-VIDEO
* Required Equipments
Remote controller for adjustment.
MSPG-925FS Pattern Generator (Which has Video Signal:
* Required Equipments
Remote controller for adjustment.
MSPG-925FS Pattern Generator (Which has Video Signal:
7 ColorBar Pattern shown in Fig. 1)
=> Model: 202 / Pattern: 65
Ready
ADC
RF/AV/S-VIDEO
Component
RGB-PC
MSPG925FS
PAL
Model:215(720P)
Model:3
INPUT SELECT
AV3
Pattern:65
(1024x768 768Hz)
Model:202(PAL-BGDHI)
*720P/50Hz
Pattern:65
Pattern:65
7 Color Bar
*PAL 7 Color Bar
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