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Kenwood CD-423M-S Service Manual page 6

Multiple compact disc player
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CD-423M/423M-S/424M/DPF-J3030/J5030
QQ
3 7 63 1515 0
5. Test mode
INPUT KEY
Insert the AC plug to
the wall outlet with
pressing the SKIP-
DOWN key.
Insert the AC plug to
the wall outlet with
pressing the REPEAT
key
PLAY/PAUSE
STOP
UP
DOWN
RANDOM
TE
L 13942296513
REPEAT
CONFIRM
(TIMER PLAY SW)
Insert the AC plug
to the wall outlet with
pressing the UP key.
Insert the AC plug
to the wall outlet with
pressing the
RANDOM key.
PLAY/PAUSE
STOP
UP
DOWN
www
RANDOM
DISPLAY
REPEAT
CONFIRM
(TIMER PLAY SW)
6
CIRCUIT DESCRIPTION
INITIAL CONDITION
• Disc No.1 moves to the center.
• Clear the memory of the SRAM.
• Door opens.
• Set the switch of TIMER ON PLAY to ON.
• Set the switch of SYSTEM CONTROL to XS8.
CIRCUIT ADJUSTMENT
• Open the door and load the disc to the Disc No.1.
• Close the door. The unit changes to test mode 05 .
after clamping the disc
Change the mode 05(tracking-on) and 03(tracking-off) alternately .
by the PLAY key
Stop the function.
The pickup travels outwards.
The pickup travels inwards.
Shows the result of self-adjustment.
07 EF/FB
08 TG/FG
09 FE/RF
10 TE/VC
Mode changes alternately by the RANDOM key.
Playback PGM signal of the Track No.7,13,23,30,34
and 41 in the order. And release the test mode.
Release the test mode.
Check the switch position.
CHECK THE MECHANISM JAMMING.
Clamp the Disc No1,2,100,50,200 and 199 in the order.
THE MECHANISM TEST MODE.
Display shows Niagara until pressing any keys.
Change the mode 05(tracking-on) and 03(tracking-off) alternately
by the PLAY key.
Stop the function.
Shows the result of self-adjustment.
07 EF/FB
08 TG/FG
09 FE/RF
10 TE/VC
Mode changes alternately by the STOP key.
Arm Motor Load operation.
Arm Motor Unload operation.
Rotary Motor Clockwise turning.
Rotary Motor Counterclockwise turning.
x
ao
y
Playback PGM signal of the Track No.1,23 and 41
in the order.And release the test mode.
.
i
Release the test mode.
Check the switch position.
8
PROCEDURE
Q Q
3
6 7
1 3
u163
.
2 9
9 4
2 8
DISPLAY
MECHA. INITIAL
INITIAL OK!!
INITIAL NG
TIMER, NG
SER, NG
TEST ON
05 XX:XX
00
MOTOR FORWARD
MOTOR REVERSE
07 XXX:XXX
08 XXX:XXX
09 XXX:XXX
10 XXX:XXX
NG: blinking
1 5
0 5
8
2 9
9 4
TIMER ON , TIMER OFF
05 XX:XX
07 XXX:XXX
08 XXX:XXX
09 XXX:XXX
10 XXX:XXX
NG: blinking
MOTOR LOAD
MOTOR UNLOAD
m
MOTOR CW
MOTOR CCW
co
TIMER ON , TIMER OFF
9 9
03 XX:XX
2 8
9 9
03X:XX

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Cd-423mDpf-j3030Dpf-j5030Cd-424m