- 2-5 -
NO
NO
NO
NO
NO
NO
Laser does not light.
Is “3.5V” applied to pin of IC 801?
Is power supplied to laser Q801?
(Q 801 collector: about 1.8V)
Does laser current flow?
1.0V across R808
Is data transferred from
MICOM IC ?
Does voltage appear at IC
802 pin 17, 18?
Defective MICOM.
Defective MICOM.
Defective connector.
Defective IC 801, 802
Defective slide motor and/or
connector.
Defective LMT SW and/or
connector.
Defective Q 801 and/or laser.
Defective laser and/or
connector.
Did pickup return to
innermost circular?
Does it stop at inner pick
circular after shift?
Is defect output from LM
SW applied to pin 2 of
PN802?
R808»1.0V
R808«1.0V
YES
YES
YES
YES
OPEN
CLOSE
YES
YES
YES
YES
YES
YES
70
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