Sanyo NV-E7500 - Navigation System With DVD Player Service Manual page 30

EXPLANATION OF CIRCUIT
1. RF AMP PART(IC1101)
For the signal read by PICK UP, AMP is performed, and equalizing of playback RF signal and
error signal required for each SERVO are generated.
2. DSP PART(IC1201)
Digital signal processing of the signal from RF AMP is performed, and control signals of PICK UP,
SPINDLE MOTOR, and FEED MOTOR etc are outputted.
Recovery and correction of RF signal also performed.
3. ATAPI I/F PART IC1250
It communicates by ASIC and ATAPI I/F in NAVI PCB.
4. MICROCOMPUTER PART IC1151
When in NAVI MODE, +5V power supply is supplied, and operation of DVD BLOCK is controlled.
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