LG 50PM4MA-WA (CHASSIS:PM75A) Service Manual ▷ View online
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V
Module Specification
Market
Video Input (1EA)
Video Output (1EA)
S-Video Input (1EA)
Component Input (2EA)
RGB Input (1EA)
RGB Output (1EA)
HDMI Input (1EA)
Audio Input (4EA)
Audio Output (2EA)
Wired Control
RS-232C Input (1EA)
RS-232C Output (1EA)
1
2
3
4
5
6
7
8
9
10
11
12
13
No
Item
Specification
Remark
World Wide
PAL-BG/DK/I. PAL-M/N, SECAM, NTSC
PAL-BG/DK/I. PAL-M/N, SECAM, NTSC
PAL-BG/DK/I. PAL-M/N, SECAM, NTSC
Y/Cb/Cr, Y/Pb/Pr
RGB-PC/DTV
RGB-PC/DTV
HDMI-PC/DTV
PC Audio(1EA), Component(2EA), AV(1EA)
AV(1EA), External audio out(1EA)
Discrete IR
UART
UART
7-SYSTEM
7-SYSTEM
7-SYSTEM
1. Application Object
These instructions are applied to all of the 50” PLASMA
Monitor TV, PM75A Chassis(H3-HIGH).
Monitor TV, PM75A Chassis(H3-HIGH).
2. Note
(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 protect test instrument.
transformer will help protect test instrument.
(2) Adjustment must be done in the correct order.
(3) The adjustment must be performed in the circumstance of
(3) The 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.
there is no specific designation.
(4) The input voltage of the receiver must keep 100-240V~,
50/60Hz.
(5) Before adjustment, execute Heat-Run for 30 minutes at RF
no signal.
3. Adjustment Items
1) Push the ADJ key in the Adjust Remocon.
2) Input the Option Number that was specified in the BOM,
2) Input the Option Number that was specified in the BOM,
into the Shipping area.
3) Select “Tool Option1/ Tool Option2” by using
D
/
E
(CH +/-)
key, and press the number key(0~9) consecutively.
ex) If the value of Tool Option1 is 7, input the data using
ex) If the value of Tool Option1 is 7, input the data using
number key “7” (Fig.1)
4) Press ‘power’ key of Adjust Remote Controller.
4. ADC Calibration
- Press the FRONT-AV KEY on R/C for converting input mode.
(Change RS-232 Host : PC, BandRate : 115200bps)
(Change RS-232 Host : PC, BandRate : 115200bps)
5. Auto RF/AV/S-VIDEO Color Balance
5-1. Requirement
V
This AV color balance adjustment should be performed
before white Balance Adjustment.
V
After AV color balance adjustment, Change the mode from
AV to RF.
5-2. Required Equipment
1) Remote controller for adjustment.
2) 802F Pattern Generator, Master(MSPG-925FA), etc.
2) MSPG-925FA Pattern Generator (Which has Video Signal:
2) 802F Pattern Generator, Master(MSPG-925FA), etc.
2) MSPG-925FA Pattern Generator (Which has Video Signal:
100% Color Bar Pattern shown in Fig.2).
- Model: 202 / Pattern: 33(PAL : CH)
- Model: 202 / Pattern: 33(PAL : CH)
5-3. Method of Auto RF/AV/S-VIDEO Color
Balance.
1) Press the FRONT-AV KEY on R/C for converting input
mode.
2) Input the Video Signal: 100% Color Bar signal into
AV3(ZH), AV1(TH), VIDEO1(MH)
3) Set the PSM to Standard mode in the Picture menu.
4) Press INSTART key on R/C for adjustment.
5) Press the
4) Press INSTART key on R/C for adjustment.
5) Press the
G
(Vol. +) key to operate the set, then it becomes
automatically
6) Auto-RGB OK means the adjustment is complete.
AV ADC condition
Component
RGB
MSPG925FA PAL
Model:217 Model:
3
CH model : AV1
(720P@50Hz)
(1024*768@60Hz)
Model: 202(PAL-BGDHI)
Pattern: 33 *100% Color Bar
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ADJUSTMENT INSTRUCTIONS
(Fig.1)
- System control RS-232 Host should be “PC“ for adjustment.
(Fig.2)
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6. Adjustment of Component
6-1. Required Equipment
1) Remote controller for adjustment.
2) 802F Pattern Generator, Master (MSPG-925FA), etc.
3) MSPG-925FA Pattern Generator ( Which has 720p@60Hz
2) 802F Pattern Generator, Master (MSPG-925FA), etc.
3) MSPG-925FA Pattern Generator ( Which has 720p@60Hz
YPbPr signal : 100% Color Bar Pattern shown in Fig.3 )
- Model: 217 / Pattern: 33
- Model: 217 / Pattern: 33
4) It is very import to use correct adjustment pattern like Fig.3.
(1) Within the pattern, color sequence should be aligned
: White-Yellow-Cyan-Green-Magenta-Red-BLUE-BLACK
( If color sequence is reversed (Black -> -> White),
( If color sequence is reversed (Black -> -> White),
reverse the pattern with REV key, when using Master
pattern generator like MSPG-925 )
pattern generator like MSPG-925 )
(2) If Minimum Black Level and/or Maximum White Level is
not correct, Do select 100% Color Bar Pattern.
6-3. Method of Auto Component Color Balance
1) Input the Component 720p 100% Color Bar(MSPG-925FA
model:217, pattern:33) signal into Component.
(WA: Component 1 or 2)
(WA: Component 1 or 2)
2) Set the PSM to Standard mode in the Picture menu.
3) Press the INSTART key on R/C for adjustment.
4) Press the
3) Press the INSTART 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
7. Adjustment of RGB
7-1. Required Equipment
1) Remote controller for adjustment.
2) 802F Pattern Generator, Master (MSPG-925FA), etc.
3) MSPG-925FA Pattern Generator ( Which has
2) 802F Pattern Generator, Master (MSPG-925FA), etc.
3) MSPG-925FA Pattern Generator ( Which has
XGA[1024*768] 60Hz PC Format output signal : 100%
Color Bar Pattern shown in Fig.4)
Color Bar Pattern shown in Fig.4)
4) It is very import to use correct adjustment pattern like Fig.4.
(1) Within the pattern, color sequence should be aligned
: White-Yellow-Cyan-Green-Magenta-Red-BLUE-BLACK
( If color sequence is reversed (Black -> -> White),
( If color sequence is reversed (Black -> -> White),
reverse the pattern with REV key, when using Master
pattern generator like MSPG-925 )
pattern generator like MSPG-925 )
(2) If Minimum Black Level and/or Maximum White Level is
not correct, Do select 100% Color Bar Pattern.
7-3. Method of Auto RGB Color Balance
1) Input the PC 1024x768 @ 60Hz with 100% color bar
pattern like Fig.3. into RGB.
(Ex. MSPG-925FA, model:3, pattern:33)
2) Set the PSM to Standard mode in Picture menu.
3) Press the INSTART key on R/C for adjustment.
4) Press the
2) Set the PSM to Standard mode in Picture menu.
3) Press the INSTART key on R/C for adjustment.
4) Press the
G
(Vol. +) key operate To set , then it becomes
automatically.
5) Auto-RGB OK means adjustment is completed.
6) Change RGB Mode for HDMI Mode(Because of D-BOX
6) Change RGB Mode for HDMI Mode(Because of D-BOX
Check).
(Fig.3)
(Fig.4)
8. Method of D-BOX(LST-4100B) Check
- Use the cables and D-Box below for D-box check.
8-1. Method of D-Box Connection
1) Connect Power to
2) Connect
2) Connect
to SET or JIG AC-IN
3) Refer to above picture and then, Connect RS-232C and
HDMI cable.
8-2. D-Box Check Method
1) After D-Box connection, Press menu key on D-Box Remote
controller.
2) When below picture is displayed on the screen, D-box
check is done.
9. POWER PCB Assy Voltage
Adjustments
(Va, Vs Voltage adjustments)
9-1. Test Equipment :
Stick for adjustment
D.M.M. 1EA
9-2.Connection Diagram for Measuring
: refer to Fig.5
9-3. Adjustment Method
(1) Adjustment method for Power board
- After Changing RF snow noise.
(2) Va Adjustment
1) After receiving 100% Full White Pattern, HEAT RUN.
2) Connect + terminal of D.M.M to Va pin of P812, connect
2) Connect + terminal of D.M.M to Va pin of P812, connect
- terminal to GND pin of P812).
3) After turning VR951, voltage of D.M.M adjustment as
same as Va voltage which on label of panel right/top.
(Deviation; ±0.5V)
(Deviation; ±0.5V)
(3) Vs Adjustment
1) Connect + terminal of D.M.M to Vs pin of P812, connect
– terminal to GND pin of P812.
2) After turning VR901, voltage of D.M.M adjustment as
same as Va voltage which on label of panel right/top.
(Deviation; ±0.5V)
(Deviation; ±0.5V)
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(1) LST-4100B
D-box
(2) RS-232C
(male to male)
(3) HDMI
1EA
(4) Power Cord
2EA
(Fig.5) Connection diagram of power adjustment for measuring
Each PCB assembly must be checked by check JIG set.
(Because power PCB Assembly damages to PDP Module,
especially be careful)
(Because power PCB Assembly damages to PDP Module,
especially be careful)
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