Daewoo DN-W551, Service Manual

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Daewoo DN-W551 Service Manual
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Read disc problem in a DVD player is a very complicated issue that may
involve complex issues. This problem is not only relation to the electronic
circuit, but also very much relation to the operation environment.
DVD loading unit is a very complicate part that contains big number of ESD
components, which require specific equipment, tools and technique to repair;
in general, service technician is not suggested to disassemble the DVD
loading unit. It is suggest proving the trouble and replacing the complete DVD
loading unit, instead of repairing the DVD loading unit in local workshop.
It is suggested to prove the faulty of a DVD loading unit by replacement by a
good DVD loading unit.
Before checking the "NO Disc" Trouble, ensure excluding the following
possibilities:
The test disc is damage.
AC power supply voltage dropped below the minimum required level.
DVD disc region code and color system is not matching to the DVD
player or system setting.
Moisture condensed inside the unit. (Power on the unit, without disc
loaded, for 1/2 to 2 hours).
Service Flow Chart
Read
DISC Trouble
Check DVD LOADER
NG
Replace Connector
Connector Condition
OK
Replace DVD Loading Unit
NG
Check the MEPG ATAPI Check the other Parts by
I/F Interface Circuit Replacement Method
3.3. Video Trouble Service Flow Chart
3.2. Read Disc Trouble Service Flow Chart