Philips CDR880 - Repair Module and Component Level Repairs; Central Repair Module Overview; Local Component Repair Areas

BASICS CDR/RW 9
POWER
SUPPLY
Supply-part
ls asd io
ENCODER DATAPAD }+—
—a :
BE-proc. USER-proc. |i
NEC (| | HC11K4 |:
a
DECODER ROM/RAM DISPLAY
Basic engine ; User-part | Display-part
Figure 14
Central repair CDM loader module
For easy diagnostics of the CDM Loader Module, the set is
equipped with a selfdiagnostics program.
This basic description contains some details of the working/
functions of the CDM Loader Module.
All functions in the recorder can be divided into mechanical
activities with the disc and separate electrical circuits.
In chapter 3.2 and included paragraphs the mechanical part
with its control systems with the encoding and decoding is
described, in chapter 3.3 and its paragraphs the rest of the
Electrical part is explained.
On next drawing the OVERALL BLOCKDIAGRAM is shown.
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& PH i LI PS Service disc systems