Teac A-650 - Component Removal Procedures for TEAC A-650; Head Removal and Replacement; Pinch Roller Removal and Adjustment

4-4. HEAD
First do procedure in section 4-1.
1.
ERASE HEAD
O ’
2.
Fig. 4-3 Heads/Pinch Roller Replacement
4-5. PINCH ROLLER
First do procedure in section 4-1.
1.
REC/PLAY
ERASE
2.
T-463
Fig. 4-4 Head Wiring Diagram
A
4-6. CASSETTE HOLDER
First do procedures in section 4-1 and 4-2.
2-PSA M2.6x6
2-BSA M3x6
5.
6.
2-BSA M3x6
Fig. 4-5 Cassette Holder Removal
8
Unsolder each lead wire from the terminal pins of tire
head to facilitate replacement. To re-solder each head
wire to the newly replaced head, refer to Fig. 44.
2. Lift up the heads after taking off tire hardware mount 
ing them.
1.
2.
Remove the E-ring retaining the Pinch Roller Ass ’ y (A)
and remove the Spring (B) from the hook (C) of the
Head Base Plate and the tab of the Pinch Roller Ass ’ y.
Remove the Pinch Roller Ass ’ y from the pivot stud pin
of the Plate.
Take off the 2 screws (H) from the transport chassis.
Loosen the 2 screw (G) to separate the Cassette Holder
Door (F) and the Cassette Holder (E).
Detach the Door (F) from the chassis.
Remove the Micro Switch Ass ’ y (B) to simplify the
next steps.
Take off the E-ring (A) to separate the Cassette Holder
(E) from the chassis.
Remove the Holder (E).
RED
WHT
GRN
BLU
3.
4.
NOTE
After replacement, always clean the driving surfaces
of the Pinch Roller with the TEAC TZ-261B Rubber
Cleaner or with pure alcohol, then proceed directly
to the PINCH ROLLER PRESSURE adjustment
section. See page 13.
NOTE
1. After replacing the head, always adjust the head
alignment, especially the Record/Playback Head ’ s
azimuth (see 6-2-1), and then secure the screws
and/or the nut with a drop of locking paint.
Connect the wires to the head terminal pins
quickly to prevent breaking of internal wires of
the head due to overheating.
W-20
N - M *£vr'L
J©
O SW-20
B M2x4
2-B M2x4
O ’
REC/PLAY HEAD
.^W-20 '