General - Sony ICF-CD820 Service Manual

LASER DIODE AND FOCUS SEARCH
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-
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.
laser diode
emission
This section is extracted from
instruction manual.
Insert a precision
screwdriver and
push S420.
– 4 –
SECTION 2

GENERAL