Read LG 42LY99-ZC (CHASSIS:LD75C) Service Manual online
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ADJUSTMENT INSTRUCTION
1. Application Range
This spec. sheet is applied to all of the LD75C chassis
manufactured at LG TV Plant all over the world.
manufactured at LG TV Plant all over the world.
2. Specification.
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
However, the use of isolation transformer will help to
protect test instruments
2) Adjustment must be done in the correct sequence.
3) The adjustment must be performed at 25±5°C temperature
3) The adjustment must be performed at 25±5°C temperature
and 65±10% relative humidity if there is no specified
designation.
designation.
4) The input voltage of the receiver must be kept between
100-220V~, 50/60Hz.
5) Before adjustment, execute Heat-Run for 30 minutes at RF
no signal.
3. Channel Memory
1) Press ADJ key in Adjust remote control.
2) Select “System Control 3” by using
2) Select “System Control 3” by using
D
/
E
(CH+/-) key, and
press
A
(ENTER).
3) Select “Channel Recover” by using
D
/
E
(CH+/-) key, and
press
G
(VOL+).
4) When Channel Recover is completed, set will be turned off
and LED light og to stand-by model.
Tool option 1 and 2 are fixed. So, you need not chaange
these munbers.
these munbers.
4. ADC Calibration
- This process should be done at insert process. If ADC Cal. is
not done at whole assembly line , you should do this
process again.
process again.
<Caution>
- System control RS-232 Host should be “PC” for adjustment.
- Before AV ADC Calibration, execute the “Module selection”.
- 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
(1) Required Equipments
- Remote controller for adjustment
- MSPG-925FS Pattern Generator (Which has Video
- MSPG-925FS Pattern Generator (Which has Video
Signal: 7 Color Bar Pattern shown in Fig. 1)
=> Model: 202 / Pattern: 65
=> Model: 202 / Pattern: 65
(2) Method of Auto RF/AV/S-VIDEO Color Balance.
1) Input the Video Signal: 7 Color Bar signal into AV3.
2) Set the PSM to Dynamic mode in the Picture menu.
3) Press IN-START key on R/C for adjustment.
4) Press the
2) Set the PSM to Dynamic mode in the Picture menu.
3) Press IN-START key on R/C for adjustment.
4) Press the
G
(Vol.+) key to operate the set, then it
becomes automatically.
5) Auto-RGB OK means the adjustment is completed.
4.2. Adjustment of Component.
(1) Required Equipments
- Remote controller for adjustment
- MSPG-925FS Pattern Generator (Which has 720p/60Hz
- MSPG-925FS Pattern Generator (Which has 720p/60Hz
YPbPr output Pattern shown in Fig. 1 )
=> Model:215/Pattern: 65
=> Model:215/Pattern: 65
(2) Method of Auto Component Color Balance
1) Input the Component 720p/50Hz 7 Color Bar(MSPG-
925FS model:215, pattern:65) signal into Component.
2) Set the PSM to Dynamic mode in the Picture menu
3) Press the IN-START key on R/C for adjustment.
4) Press the
3) Press the IN-START key on R/C for adjustment.
4) Press the
G
(Vol.+) key to operate the set, then it
becomes automatically.
5) Auto-RGB OK means the adjustment is completed.
Model Name Tool option 1 Tool option 2 Maker Inch
Tool
42LY99
228087
1733
WCG
42
LY99
ADC
RF/AV/S-VIDEO
Component
RGB-PC
MSPG925FS PALJ
Model:215 (720P) Model: 3
INPUT SELECT AV3
Pattern:65
(1024*768 60Hz)
Model: 202 (PAL-BGDHI) 720P/50Hz
Pattern: 65
Pattern: 65
7 Color Bar
PAL 7 Color Bar
<Fig. 1>
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