Read LG 42PB4D-AA (CHASSIS:PB73B) Service Manual online
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ADJUSTMENT INSTRUCTIONS
1. Application Object
These instructions are applied to all of the 42” PLASMA TV,
PB73B Chassis
PB73B Chassis
2. Notes
(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 equipment.
transformer will help protect test equipment.
(2) Adjustments must be done in the correct order.
(3) The adjustments must be performed in the circumstance of
(3) The adjustments 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 be must kept 220V~,
60Hz when adjusting.
(5) The receiver must be operational for about 15 minutes
prior to the adjustments.
O
Preliminary action is 100% FULL WHITE PATTERN must
be operated automatically.(Ez-Adjust 10. Test Pattern)
O
Test for afterimage discharge detection
1) How to Adj R/C pressing Power key.
2) Press the ADJ KEY of the adjusting R/C to enter into the
2) Press the ADJ KEY of the adjusting R/C to enter into the
Ez-Adjust, use the CH +/- key to select ‘10. WHITE
PATTERN’, and press the confirmation (
PATTERN’, and press the confirmation (
A
) key. Then,
‘100% FULL WHITE PATTERN’ is displayed.
[ Set is activated HEAT-RUN without signal generator in
this mode.
3. EDID(The Extended Display
Identification Data)/DDC
(Display Data Channel) Download
(Display Data Channel) Download
This has been established by VESA and is the function
created to “Plug and Play” by making the computer
reconfigure user environment through communication with the
monitor automatically without having the user set commands
directly to the PC or the monitor so that the user can use it
immediately.
* When writing EDID, use DDC2B protocol.
created to “Plug and Play” by making the computer
reconfigure user environment through communication with the
monitor automatically without having the user set commands
directly to the PC or the monitor so that the user can use it
immediately.
* When writing EDID, use DDC2B protocol.
3-1. HDMI EDID Data Input
(1) Required Test Equipment
- PC, Jig for adjusting DDC. (PC serial to D-sub
Connection equipment)
- S/W for writing DDC (EDID data write & read)
- D-Sub cable
- Jig for HDMI Cable connection
- D-Sub cable
- Jig for HDMI Cable connection
(2) Adjustment preparation & device configuration
- Configure as Fig. 7, and turn on the PC
- Turn on the JIG.
- Run the DDC recording S/W (EDID Data Write & Read).
- Turn on the JIG.
- Run the DDC recording S/W (EDID Data Write & Read).
(Execute in DOS mode)
3-2. EDID DATA for PB75A
A
EDID for HDMI-1 (DDC (Display Data Channel) Data)
EDID table =
EDID table =
A
EDID for HDMI-2 (DDC (Display Data Channel) Data)
EDID table =
EDID table =
If you turn on a still screen more than 20 minutes (Especially
Digital pattern, Cross Hatch Pattern), an afterimage may occur
in the black level part of the screen.
Digital pattern, Cross Hatch Pattern), an afterimage may occur
in the black level part of the screen.
PC
VSC
B/D
JIG cable(CPLD D/L )
<Fig.1> Connection Diagram of CPLD Download
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