Very usefull manual. From my point of view there are needs more clearables images.
Text excerpt from page 64 (click to view)
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Symptoms That May Occur When Any Of The Following ICs Is In Failure
IC
A
Symptoms
EEP ROM User's data cannot be stored in memory. (DVD MT PCB Assy : IC4001) The ID number is lost. 16M Flash ROM The power cannot be turned on. (DVD MT PCB Assy : IC4004) Downloading of the firmware cannot be performed. DVD IC Any kind of symptoms (no power, a failure in any of the servo, video and audio systems, etc.) may be (DVD MT PCB Assy : IC4002) generated, because the DVD processing is performed by a single chip. 64M SDRAM No power. (DVD MT PCB Assy : IC4005) Block noise is generated during playback.
