Thanks you very much for this "hard to find" service manual.
Will help a lot in repairing this tuner.
Text excerpt from page 62 (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 : IC4003) 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 : IC4001) 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.
