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42 Inch(Wide) PDP SVC Training Manual

LG Electronics / DND QA
Contents
. Usage/Service Points to be concerned
. Module formation & spec
. Screen defect diagnosis
1. 4/7 or 3/7 of screen is not displayed.
2. Screen by Data COF is not displayed.
3. one or more of Data COF IC have regular vertical lines.
4. Data COF IC unit error pattern
5. The screen by Scan COF is not displayed.
6. Regular- interval vertical line in the whole screen.
7. Vertical data copy
8. One or more vertical bars.
9. One or more horizontal bars.
10. Input signal pattern is displayed but the whole brightness of screen is dark.
11. In full white pattern, foreign color is displayed or in full black pattern, mis-
discharge is partially occurred..
12. In full white pattern, the brightness is getting darker toward the center.
13. A specific brightness of one color is not clear.

. Non-picture defect diagnosis
. One Point Service Guide(42 Inch, 40 Inch)
. Usage/Service points to be concerned

Color PDP is a display device consisting of Panel section & Drive section. Panel section is composed of electrode,
fluorescent substances ,dielectrics and gases, and drive section is a combination of electrical circuit section and
PCB section. We call this concrete as PDP Module Ass'y and the following shows warning.

SUGGGESTIONS
1. Static precaution
Drive section circuit is C-MOS circuit, so to protect against static electricity, wear static-proof wrist band.

2. Cleaning
when wiping panel, do not use liquid cleaner or other chemicals . Use a damp cloth for cleaning .

3. handling
Color PDP uses high voltage(Max.500V). Be aware of electronic shock when handling PDP Unit and don't touch drive circuit.
and even driver circuit's capacitor is turned off but charge still remains there, so to touch drive circuit, be sure to wait at least 1 minute.

4. Warning when connecting signal & Power Connector in operation
do not touch connector while Color PDP is operating.

5. PDP servicing and guarantee
Glass Panel and Drive Circuit section are linked and operating together.
if you disassemble and assemble the product in your own hands , LGE is exempted from the guarantee of function, quality and etc.

6. Damage in still image
Color PDP uses fluorescent material. The quality of PDP fluorescence by nature becomes deteriorated if using it in the same condition of CRT.
To prevent this symptom, input full-screen regularly or use screensaver software.
So do not display the still image for a long time.

7. Temperature & ventilation
Color PDP's Glass Panel section and Drive circuit section emit the heat so the temperature shall be kept under 40.
the temperature of glass panel section is pretty high because built-in drive circuit emits the heat.
PDP is operating with high voltage therefore be sure to keep it away from conductive objects.

8. Warning when handling Module
be aware that PDP shall not be touched by metal or hard objects and shocked by the heat or mechanical force.
be careful when disassembling or handling.
be sure to wear glove for preventing injury when the glass's broken.

LG Electronics/DND QA Gr
Service warning

1. When inserting parts or PCB, fasten the lead line to terminal before soldering.
2. When inserting high- voltage resistance(metal oxide film resistance or metal film resistance), keep 10mm away from PCB
3. High-voltage or high-temperature parts shall be away from the lead line.
4. This chassis is insulation(cold) chassis but for safety, it is better to use insulation trance.
when servicing power board, be sure to use insulation trance.
5. While PDP Module is in operation, do not connect or remove lines.

With COF or panel defect, report it to LGE PDP module service department.

Defect diagnosis tool

1. One DVM ( FLUKE 87 or similar type )
2. Digital Oscilloscope ( over 200MHZ )

LG Electronics/DND QA Gr
MN-42PZ10 Spec & Features
MN-
91.5
1259
82
1056

Power : 220V 60Hz
635
Power consumption : 340W
693.5

220 114.8
779.5
281
1379

aspect ratio: 16:9 8500