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LG E2042T Инструкция по эксплуатации онлайн [6/20] 80493
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- 6 -
Circuit Board Foil Repair
Excessive heat applied to the copper foil of any printed
circuit board will weaken the adhesive that bonds the foil
to the circuit board causing the foil to separate from or
"lift-off" the board. The following guidelines and
procedures should be followed whenever this condition is
encountered.
At IC Connections
To repair a defective copper pattern at IC connections use
the following procedure to install a jumper wire on the
copper pattern side of the circuit board. (Use this
technique only on IC connections).
1. Carefully remove the damaged copper pattern with a
sharp knife. (Remove only as much copper as
absolutely necessary).
2. carefully scratch away the solder resist and acrylic
coating (if used) from the end of the remaining copper
pattern.
3. Bend a small "U" in one end of a small gauge jumper
wire and carefully crimp it around the IC pin. Solder the
IC connection.
4. Route the jumper wire along the path of the out-away
copper pattern and let it overlap the previously scraped
end of the good copper pattern. Solder the overlapped
area and clip off any excess jumper wire.
At Other Connections
Use the following technique to repair the defective copper
pattern at connections other than IC Pins. This technique
involves the installation of a jumper wire on the
component side of the circuit board.
1. Remove the defective copper pattern with a sharp
knife.
Remove at least 1/4 inch of copper, to ensure that a
hazardous condition will not exist if the jumper wire
opens.
2. Trace along the copper pattern from both sides of the
pattern break and locate the nearest component that is
directly connected to the affected copper pattern.
3. Connect insulated 20-gauge jumper wire from the lead
of the nearest component on one side of the pattern
break to the lead of the nearest component on the
other side.
Carefully crimp and solder the connections.
CAUTION: Be sure the insulated jumper wire is
dressed so the it does not touch components or sharp
edges.
Copyright
Only for training and service purposes
LGE Internal Use Only
2010 LG Electronics. Inc. All right reserved.
Содержание
- Caution 1
- Chassis no lm12a 1
- Color monitor service manual 1
- E2042t 1
- E2042t a 1
- Adjustment 14 2
- Block diagram 11 2
- Contents 2
- Description of block diagram 2 2
- Disassembly 9 2
- Exploded view 0 2
- Precautions 4 2
- Replacement parts list 2 2
- Schematic diagram 26 2
- Specifications 2
- Specifications 2 2
- Timing chart 8 2
- Troubleshooting guide 16 2
- Wiring diagram 19 2
- Caution 3
- Leakage current hot check circuit 3
- Precaution 3
- Warning 3
- Servicing precautions 4
- Timing chart 7
- Disassembly set 8
- Place the monitor face down on the cushion or soft cloth 8
- Remove the stand body and atand base from the product 8
- Boost converter of led block converters 19v to 41v and operates back light led strings of module in e2042t case 10
- Description of block diagram 10
- Adjustment 11
- A clear eti to initialize using time c auto color w b balance and automatically sets the gain and offset value press key for over 3 sec d aging select aging mode on off b module to select applied module d nvram init eeprom initialize 24c16 press key for over 3 sec e r g b 9300k allows you to set the r g b 9300k value manually f r g b 6500k allows you to set the r g b 6500k value manually g r g b offset allows you to set the r g b offset value manually analog only h r g b gain allows you to set the r g b gain value manually analog only 12
- Copyright 12
- Figure 1 cable connection 12
- Only for training and service purposes lge internal use only 2010 lg electronics inc all right reserved 12
- Service osd 12
- The svc osd menu contains additional menus that the user osd menu as described below 12
- Turn off the power switch at the right side of the display 12
- Wait for about 5 seconds and press menu power switch for 1 second interval 12
- Check ic103 pin 42 43 13
- Ic102 pin3 5v 13
- No power 13
- Troubleshooting guide 13
- Waveforms 13
- No raster osd is not displayed main 14
- Trouble in dpm 15
- Waveforms 15
- Ead 61426311 16
- Lgd ead61905269 16
- Main board 16
- Wiring diagram 16
- Mfl67122143 20
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