This manual is very useful because it presents the technical specifications of the cd player, including the manufacturer of the reader, this helps if you need to replace it. It also displays the settings and layout of the circuit.
Manual was a good representation of service infomation for the EWV404. It worked well for my repair.
Text excerpt from page 60 (click to view)
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Symptoms That May Occur When Any Of The Following ICs Is In Failure
IC
A
Symptoms
User's data cannot be stored in memory. The ID number is lost. The power cannot be turned on. Downloading of the firmware cannot be performed. Any kind of symptoms (no power, a failure in any of the servo, video and audio systems, etc.) may be generated, because the DVD processing is performed by a single chip. No power. Block noise is generated during playback.
EEP ROM (DVD MT Assy : IC4003) 16M Flash ROM (DVD MT Assy : IC4004) DVD IC (DVD MT Assy : IC4001) 64M SDRAM (DVD MT Assy : IC4005)
