Read Sony ICF-CD820 / ICF-CD820L / ICF-CD821 Service Manual online
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LASER DIODE AND FOCUS SEARCH
OPERATION CHECK
OPERATION CHECK
1. Open the CD lid.
2. Turn on S420 as following figure.
3. Confirm that the laser diode emission while observing the ob-
2. Turn on S420 as following figure.
3. Confirm that the laser diode emission while observing the ob-
jecting lens. When there is no emission, Auto Power Control
circuit or Optical Pick-up is broken.
Objective lens moves up and down once for the focus search.
circuit or Optical Pick-up is broken.
Objective lens moves up and down once for the focus search.
SECTION 2
GENERAL
This section is extracted from
instruction manual.
instruction manual.
Insert a precision
screwdriver and
push S420.
screwdriver and
push S420.
laser diode
emission
emission
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