Trouble Shooting - Daewoo DPX-42D1NMSB Service Manual

11. TROUBLE SHOOTING

11-1. Facts you must know when Trouble diagnosis or repairing
(1) Sets trouble diagnosis and repairing means Module Exchange. In other words, find out which PCB modules are not working and replace them with
normal PCB modules. Do not need to fix broken PCB modules in themselves.
(2) This TROUBLE SHOOTING list only contains representative and simple PCB trouble diagnosis and Module Exchange method. Therefore, if you find
Sets that are difficult to diagnose or to repair, contact Daewoo Electronics.
(3) Basic TROUBLE SHOOTING procedure Check Trouble Symptom Detach BACK COVER Trouble Diagnosis replace broken PCB module Adjust new
PCB module ( when replacing X-SUS, Y-SUS, POWER, VIDEOPCB, need Voltage adjustment) HEATRUN (for at least 30minutes, input TEST
PATTERN FULL WHITE), FUNCTION CHECK Repair Complete.
(4) Keep broken PCB modules separately for replacing with new PCB modules.
(5) Required equipments for trouble diagnosis- DIGITAL MULTIMETER (User Mode : measure DC VOLTAGE, measure DIODEVOLTAGE, SHORT-
OPEN TEST )- Screwdriver (or electric screwdriver), plastic adjusting tool
(6) Before assemble/disassemble PCBs, check to see if AC Switch is OFF.
(7) After the set is repaired, leave BACK COVER open for followings. Do HEATRUN for at least30 minutes by inputting SERVICE MODEs TEST
PATTERN (Refer to Service Manual 5.Service Mode) FULL WHITE. Check the screen condition and basic functions (remote control operation etc.).
(8) After BACK COVER is closed, redo HEATRUN for at least one hour by inputting FULLWHITE using SERVICE MODEs TEST PATTERN. Check the
screen condition and basic functions.
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