Technics SL-P999 Service Manual page 8

Servo P.C.B.
. Remove the 3 screws @~®).
. Unsolder the 2 terminals of spindle motor.
. Remove the FPC board from the optical
pickup.
Caution: To prevent the breakdown of the
laser diode, antistatic shorting
pin is inserted into the FPC board.
B. Loading motor P.C.B.
1. Remove the 2 screws @, ©).
2. Unsolder the 2 terminals of loading motor.
Procedure
12-13-15
. Remove the drive belt.
. Remove the 2 screws @, @).
. Release the 2 claws.
. Unsolder the 2 terminals of the lead wire
of loading motor.
SL-P999 SL-P999
Mi MEASUREMENTS AND ADJUSTMENTS
Caution:
¢ It is very dangerous to look at or touch the laser beam.
7°
Loading motor!
Spindle motor
FPC board terminals
Refer to the handling precautions for
optional pickup and instructions for
traverse oll (See page 9).
1. Remove the 2 screws @, @)
2. Unsolder the 2 terminals and the 2
screws (@, Q).
Optical pickup ong
sien 2 2
)y
Unsolder
Brush terminal
Caution: Take care not to touch the brush
. Set the power switch in the "OFF"
position.
. Remove the power switch rod by using a
screwdriver.
Procedure
. Power supply P.C.B.
10-12-16
. Remove the 2 screws @, @).
. Release the flat cable (CN12).
< Qe
terminal.
(Laser radiation is invisible.)
With the unit turned "on", laser radiation is emitted from the pickup lens.
Avoid exposure to the laser beam, especially when performing adjustments.
PREPARATION
1. Remove the cabinet (see Ref. No. 1 of the disassembly
instructions).
2. Remove the disc clamper and magnet (see Ref. No. 2 and
No. 11 of the same).
3. Remove the disc holder and power switch rod (see Ref. No.
3 and No. 16 of the same).
4. Place the test disc and magnet on the turntable.
5. While holding the Open/Close switches (S101, $102) in the
directions indicated by the arrows, switch the player power
ON.
6. After the test disc starts rotating, release the Open/Close
switch (S101, $102).
ADJUSTMENT POINTS
© Servo P.C.B.
VR106 aeeeres
VR101 Q ' Pe
VR105
a 5
VR104 3 TS
<> |e
Nee ® :
WZ gy B i ULL!)
FEG g 4 , 1)
iaae) =
= evi, 4
NS ie
NZ
VR102
GNO Hw v
RF output BE alll
Adjusting fixture g,
connector
(Focus offset (Focus gain / (Tracking offset adj.)
adj.) adj.)
ey (GND)
(Tracking (Tracking gain adj.)
balance adj.) (Best eye adj.)
Test disc
Magnet +
¢ Main P.C.B.
(OPTICAL) (L)(R)
Offset voltage adj.
ie offset voltage adj A
IC80l 1IC803 IC802 !C804
Ne
760) ae
en
@(+9Vv)
012 (Connect the red lead wire
of servo gain adjuster.)
@(-9Vv)
(Connect the blue lead wire
of servo gain adjuster.)
¢ Temporary setting of each VR
MageaS
Temporary VR setting if any of the trimmer VRs are
replaced or require readjustment, temporarily set them
to the following positions.