Read JBL SG 2020 Service Manual online
-12-
B
C
Does lens move up/down?
Does IC 801 out focus
search signal?
search signal?
IC 801 pin (FEO)
Is focus search signal
applied to pin , of
CN801?
applied to pin , of
CN801?
Laser lights.
Confirm
initial
read with
disc
Defective IC801
Defective IC803
Defective IC 801.
Open activator and/or
connector.
connector.
Open connector and/or
defective IC 801.
defective IC 801.
Incorrect turntable height.
Degraded laser diode.
Degraded laser diode.
Does TP 801 RF signal appear even in
low level?
low level?
Is laser output adjustment correct?
Does FOK(focus ok) signal appear?
YES
YES
YES
YES
YES
YES
TP801
(RF)
(RF)
IC801 pin
(FOK)
(FOK)
NO
NO
NO
NO
NO
NO
48
13
16
40
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