Advertisement
CAUTION
| Port | Name | W/O |
Description
Pickup (KSS-240A) is adjustment free in repairing,
| 41 DIRC__|_O _| DIRC control port of servo IC
please don't disassemble and adjust it.
KSS-240A
Focus bias
Tracking balance
VR2
42
MUTG
Mute port of signal processor
(MUTE ON :°H'}
P43 [NC
| O | Notused
44
Input port of Start Limit Switch
(ON : "L*)
input port of Tray Open Switch
(ON : "L')
Input port af Tray Close Switch
|
RF level LO POWER
a
a}
6
VAt
n
+
"oO
=
OPNS
—————————
CLSS
EE
(ON :"L*)
47
BUSY
¥O | Serial BUSY in/out port
SDATA
VO
| Serial DATA in/out port
igs
ENPUT
OUTPUT
PLAYER
ALIGNWENT
ITEM
SETTING
SETTING
SETTING
POINT
ALIGN FOR
:
7
a
49
CLSM
OPN
51
DATA
Tray close signal for motor port
Tray open signal for motor port
Signal processor and servo IC con-
trol out port (DATA)
Signal processor and servo IC con-
trol out port (LATCH)
Signal processor and servo IC con-
trol out port (CLOCK)
Laser ON/OFF signal out port
Oscillation input port (4.19MHz}
Short-cireuit
patterns TEST and
enter the test aode.
Press the MANUAL §
OP) to move the
pickup outwards,
Short-cireuit
pattems CHECK.
The LD emets
ligh
Then, confirm that
On the power from
0.08 to 0.15a¥. shen
the diffraction
grating
is correctly
a ligned with the RF
level of 1.5¥p-p or
acre and the TE
(servo opén) level
of i.5¥p-p or sore,
the pickup is
31
SENSE
i
33
SUBQ
Q-datd input port
34, 35
Not u e
36
SCOR
Sub-c@de frame sync detection sig-
nal ingut
port
FOK
Apply the seasor
section of the optical
power ameter on the
Pickup lens.
56
nput jport of FOK signal from RF
MIX]
Zp
OQ
Pad
as F E a
il
ik
WwW
the display
is "03°
acceptable.
amp
57
|
-O- | Oscillation out port
:
—
(x32-)
Boi
Input port of frame sync signal
Mss
fe
PGND:
ee
Test dise
Connect
a LPF to CNS
Sonate | OF anominervar
parr f= end
|
toe « |
pin t3, to shich | Press the PLAY
(MUT
1)
rxT2.
|
-
[Opn
2
FOCUS GAIN
Apply signal of
[ connect
an oscilloscopa
Confirm that the
FOCUS GAIN
Teo VIVMs should
.
:
j
1.0kHz,
O.1¥res tol
or two AC voltmeters.
| display
is "05".
VR2
read the same value.
N.C
O
ot u
KDO~3
| | | Key input port
CNS pin 2 and 3.
(X32-)
Test disc
Connect a LPF to CN5
Type 4
Pin 5-6, to which
Press the PLAY ke
,
TRACKING GAEN
Apply signal of
connect
an oscilloscopa
Confirm that the
TRACKING GAIN
Two YT¥Ms should
1.0kHz,
0.1¥ras to}
or two AC voltaeters.
| display
is "05".
YR}
read the same value.
CNS pin 5 and 6,
(X32-)
(X32-)
(X32-)
(X32-)
|
(NOTE)
Type
4 dise
: SONY
YEDS-18
TEST DISC or
equivalent.
:
LPF: around 47kohms+390pF or so.
(X32-)
(X32-)
(X32-)
(a) Laser Power
(b) Focus Gain, (c} Tracking Gein
Focus gain:
1.0kHz
0.1Vimns ©
;
Tracking gain:
Optical power meter
1.0kHz
|
0.1Vinms
Advertisement
