7
SERVICING PRECAUTIONS
u
Power IC, Transistor or Devices Removal / Replacement
1. Heat and remove all solders from the device leads.
2. Remove the heatsink mounting screw (if applicable).
3. Carefully remove the device from the circuit board.
4. Insert new device in circuit board.
5. Solder each device lead, and clip off excess lead.
6. Replace heatsink.
u
Diode Removal / Replacement
1. Remove defective diode by clipping its leads as close as possible to diode body.
2. Bend the two remaining leads perpendicularly to the circuit board.
3. Observing diode polarity, wrap each lead out of the new diode around the corresponding lead on the
circuit board.
4. Securely crimp each connection and solder it.
5. Inspect the solder joints of the two “original” leads on the circuit board copper side. If they are not
shiny, reheat them and apply additional solder if necessary.
u
TECHNICAL INFORMATION
Electrical
Pixel pitch
0.3mm X 0.3mm
Horizontal frequency
30KHz to 62KHz (Automatically)
Vertical frequency
50Hz to 85Hz (Automatically)
Operating temperature
10-40°C / 50-104°F
Operating humidity
8-80%
Mechanical
Cabinet
Molded Plastic Cabinet with attachable tilt & swivel base
Dimension (set with packing)
502(H) X 502(W) X 242(D) mm
Weight(net)
4.5 Kg
Controls
Power Switch
OSD control
Summary of Contents for L500B
Page 1: ...ServiceManual TFT LCD MONITOR Model L500B DAEWOO ELECTRONICS CO LTD OVERSEAS SERVICE DEPT...
Page 24: ...25 SCHEMATIC DIAGRAM u MAIN88281A...
Page 25: ...26 SCHEMATIC DIAGRAM u TOP CIRCUIT...
Page 26: ...27 SCHEMATIC DIAGRAM u BUFFER...
Page 27: ...28 SCHEMATIC DIAGRAM u POWER DC DC...
Page 28: ...29 SCHEMATIC DIAGRAM u MEMORY...
Page 29: ...30 SCHEMATIC DIAGRAM u MICOM...
Page 30: ...31 SCHEMATIC DIAGRAM u RGB SYNC...
Page 31: ...32 SCHEMATIC DIAGRAM u TDA8752A...
