Daewoo DM-K40, Руководство по обслуживанию

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Daewoo DM-K40 Service Manual
Page 29
3.2. Read Disc Trouble Service Flow Chart
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