JBL Soundgear Series, Руководство по обслуживанию

Страница: 11 / 73

-11-
A
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 R801
Is data transferred from
MICOM IC ?
Does voltage appear at IC
803 pin
, ?
Defective MICOM.
Defective MICOM.
Defective connector.
Defective IC 801, 803
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
of
PN803?
R801 1.0V
R801 1.0V
YES
YES
YES
YES
OPEN
CLOSE
YES
YES
YES
YES
YES
YES
70
11 12
2