-LA-3500
34
8 Checking Audio or Video Circuit
CD
By
using CD and CDV (Video)
1) Setting
(a) Remove Top Cover.
2) Checki
ng
2U-2570 (Main P.
W.B.
)
2U-2571 (Sub P.
W.B
.)
(
b)
Remove Tray, Connect Plate, Clamper Plate and Slide
Guide Plate.
Playback
the disk
in
the mode as
per
the Figure, and check the
circuit. Be sure use
CD or
CDV
disk, and never playback LD .
(a)
Video circuit check ·
··
CDV disk video part.
(c)
Stand Main and Sub P.W.B. as per Figure.
(b} Audio circuit check
...
CD.
(d) Detach Clamper from Clamper Plate, load a disk as per
Figure and
clamp the disk.
(2)
By
using
LD
SGK-0072
11
Pin Ex
ten
s
ion
Co
rd (Common
to
LA-3250K)
SG
K
-0071
7 Pin Flat Extensi
on
Cord
(a) Remove Top
Cover.
SG
K-0069 8
Pin
Extension Cord (Common
to
LA-3250k)
SGK-0068 27 Pin Flat Extension Cord
P.W.B
. Ass'y
2U-2570
2U-2571
2U-2573-2
SGK-0070
15
Pin
Extension Cord
Front
Panel
(b
) Remove Tray, Connect Plate, Clamper Plate and Slide Guide Plate.
(c) Remove Front Panel, Regulator P.W.B. (2U-2573-
2)
and take P.W.B. Ass'y (2U-2570 and 2U-2571 )out.
(d} Connect extension cords to 2 wires to Traverse Mechanism , 1 wire to
Spindle Motor, 1 wire to Power Switch P.W.B., and 1
wire to
Switch P.W.B. as
per
Figure above.
Also, change flat cable (27pin, ?pin) with extension cords.
Parts
No
.
Name
Remarks
SGK
-0068
27 pin flat extension cord
Traverse Mechanism
.
..
..
..
Main P.
W.B
. (Common
to
LA-3250)
SG
K-0069
8 pin extension cord
Traverse Mechanism .
..
.
..
. Main P.
W.B.
(Common
to
LA
-3250)
SGK-0070
15
pin
extension cord
Spindle Motor
...
..
...
.
..
..
..
..
.. Main P.
W.B.
SGK-0071
7 pin flat extension
cord
Switch
P.W.B
....
..
...... .
...
.
..
. Main
P.W
.B.
SGK-0072
11
pin
extension co
rd
Po
wer Switch P.
W.B
...
.. ..
.. Main
P.W.B
.
(e
) Install Slide Guide Plate, Clamper Plate, Connect Plate and Tray.
(f
) Turn power ON , push OPEN/CLOSE button, set a LD to tray and start checking.
To Next Page
