Teac A-650 - Major Component Replacement for TEAC A-650; Capstan Motor Replacement; Capstan Drive Assembly and Belt Servicing

4-7. CAPSTAN MOTOR
3.
B.
1.
3-BSA M3x6"
2.
Viewed from Rear
3.
Fig. 4-6 Capstan Motor Replacement
4.
4-8. CAPSTAN DRIVE ASS'Y/DRIVE BELT
First do procedures in section 4-1 and 4-3.
1.
2.
3-B M2.6x6x-
3.
Viewed from Rear
4.
5.
Fig. 4-7 Capstan Drive Ass ’ y/Drive Belt Replacements
6.
1.
1.
2.
2.
I. „
3.
4.
3.
9
Release the Drive Belt from the Motor Pulley.
Loosen the two screws holding the P.C. Board insula 
tor, remove the insulator and then unsolder the wires
marked with asterisks (*) from tire PC Board (part of
tire Motor Ass ’ y). Note the color code and the position
of each wire prior to unsoldering the leads.
Remove the Motor Ass ’ y together with the PC Board
from the chassis by taking off the screws.
Remove the Control PC Board Ass ’ y (1) bj' taking off
tire 4 screws (J).
Detach the Flywheel Bearing Plate Ass ’ y (C) from the
mounting studs by unscrewing the 4 screws (H).
Take out the Drive Belt (E) from the Motor Pulley (B)
and the Flywheel (F).
Pull apart the Oil Retaining Washer (A) from the shaft
of the Flywheel.
Carefully lift out the Flywheel from the Capstan Hous 
ing Ass ’ y (C).
Remove the Capstan Housing Ass ’ y from the chassis
by unscrewing the 3 screws (D).
1.
2.
NOTE
Since the Capstan Drive Ass ’ y is a precision part,
TEAC specially distributes the Flywheel and the
Capstan Housing Ass ’ y as a whole assembly.
Hence, always replace the Flywheel together
with the Capstan Housing Ass ’ y.
Clean all driving surfaces of the Flywheel and the
Drive Belt with TEAC TZ-261 Cleaner kit ( “ A ”
for Flywheel. “ B ” for Belt) or with pure alcohol.
Do not bend the Capstan Shaft as this will in 
crease wow/flutter or speed deviation.
During re-assembly re-attach the Drive Belt with 
out twisting or stretching it.
z
4-B M3x6
First remove tire Top Cabinet Ass ’ y (see 4-1), then do
section 4-3.
LUBRICATION:
For lubrication of the newly replaced Capstan Drive Ass ’ y,
the following should be observed.
Apply a drop of a light machine oil of good quality
(e.g.: TEAC TZ-255) with an oil applicator to the shaft
of the Flywheel and spread oil evenly over the shaft
with a flannel cloth. After installing the Flywheel, be
sure to clean the tape moving portion of shaft with
TEAC TZ-261 A Head Cleaner or with pure alcohol.
Apply a drop of the proper oil in the same way as
above to the innermost area of capstan shaft (next to
the Flywheel).
Apply a film of light grease to the well of the Flywheel
Bearing Plate (K).
NOTE
When re-assembling, clean the pulley and the Belt
with TEAC TZ-261 Cleaner kit ( “ A ” for the
Pulley. “ B ” for the Belt) or with pure alcohol.
Take off or remount the Motor Ass ’ y taking care
not to scratch or otherwise damage the Motor
Pulley.
When re-attaching the Drive Belt to the Pulley do
not twist or stretch the belt.
When remounting the PC Board be sure to install
the mica insulator between the transistor and the
PC Board mounting bracket.