Pioneer MJ-L7 Service Manual page 43

MJ-L7
6.3 READ-IN SWITCH POSITION MEASUREMENT MODE
(Using Test Disk 1)
Measuring with a high reflective disc (Check when replacing the MD MECHA SW ASSY.)
Setting Method Remarks Display
Test mode STOP state [ ism A ACH &]
Press the REC button INNER mode menu display [ INNER ]
Press the PLAY/PAUSE button INNER switch position address display [s c
(Refer to NOTE)
Press the STOP button of the Unit | INNER mode menu display [ INNER ]
NOTE) Adjust the read-in switch position to SUBQ FF85 to FFD2.
1. Loosen the three screws (A) securing the MD MECHA
SW ASSY.
2. While pressing the MD MECHA SW ASSY in the —
direction, tighten the screws, and measure the read in
switch position again.
After adjusting the position, secure the three screws (A).
(See Fig. 6-3)
6.4 MAGNETIC HEAD ATTACHING
POSITION ADJUSTMENT
e@ Be sure to adjust the attaching position of the magnetic
head when the magnetic head and optical pickup have been In the Circumference
replaced.
Direction
@ To make the adjustment easy, move the optical pickup to
the center position.
(1) Set transparent disc 3 for adjustment.
(2) Lower the magnetic head up shift arm with your hand,
and raise the magnetic head.
(3) Looking at the unit from the top, adjust the magnetic
head to the top of the optical pickup objective lens.
@ Inthe radial direction: Slightly loosen the head fixing
screw (A), and move the magnetic head fixture so that
the head fits the top of the pickup objective lens.
e@ Inthe circumference direction: Rotate the magnetic
head circumference direction adjusting screw (B), and
adjust so that the head is at the top of the objective lens.
(4) Check that there is space as shown in Fig. 6-4, and check
that the magnetic head moves up and down smoothly.
(5) After adjusting, apply screw-locking compound to the 5 ;
head fixing screw (A) and the adjusted screw (B). ; As & Magnetic Head
2 Circumference Direction
Adjusting Screw
MD MECHA SW ASSY
Fig. 6-3
Magnetic Head
Circumference Direction
NG Adjusting Screw (B)
Head Fixing Screw (A)
Apply screw-locking
Compound
In the Radial
Direction
Slightly loosen the
Head Fixing Screw
Magnetic Head
In the Radial Direction
aA : | (Adjust the magnetic head
Objective lens
to the top of the lens)
<_>
At the Circumference Direction
(Adjust the magnetic head to
the center of the lens)
Magnetic Head
Fig. 6-4
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