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VC-483GS,GB,N
3) Brake Unit Replacement
Notes:
CAPSTAN MOTOR REPLACEMENT
°
Removal
1. After replacing a brake unit, always check the reel
height, the V/S back tension and the fast forward
back tension.
2. The brake unit can be replaced without unsolder-
ing the lead wires on relay base plate B (step 3
of "Removal"
may be omitted). Take due care,
however, not to break the lead wires or damage
other parts.
3. When fitting or removing the reels, take care with
regard to the notes on P.8.
4. Use no screws for fitting the brake unit other than
those specified.
Removal
(remove the units on both the supply and
take-up sides by the following procedure)
1. Remove the reel as described on P.8.
2. Unsolder the brake unit terminals, both supply
side and take-up side, on relay base plate B at the
rear of the chassis.
3. Unsolder the mechanism position switch, loading
motor, reel motor and CASSETTE DOWN switch
lead wires on relay base plate B.
4. Remove the 2 fixing screws (KHPSD30P12WSO),
and fixing screw
(KHPSD30P14WSO)
on relay
base plate B, and remove relay base plate B.
5. Remove the 3 fixing screws (KBPSD26P04000)
(6) on the brake unit, and remove the brake unit.
Notes:
j. Do not mistake the polarities of the mechanism
position switch, loading motor and reel motor ter-
minals.
2. Solder the brake unit terminals after fixing the re-
lay base plate with screws.
3. If the replacement operation is carried out without
unsoldering the mechanism position switch, load-
ing motor,
reel motor
and CASSETTE
DOWN
switch leads, step 3 of "Fitting" may be omitted.
Fitting
1. Fit the replacement brake unit, facing the way
shown
in Figure 31, by means
of the 3 fixing
screws (XBPSD26P04000).
2. Fit the relay base plate B with the 2 fixing screws
(XHPSD3OP12WSO),
and_
fixing
screw
(XHPSD30P14WSO).
3. Solder the mechanism
position switch, loading
motor, reel motor and CASSETTE DOWN switch
leads.
4. Solder the brake unit terminals.
. Fit the reel as described on PQ.
6. Carry out the checks described on P.9, and check
the back tension
as described
on P10 (when
replacing the supply side brake unit only).
o1
20
2 Cup-Tight
Screws
1. Remove the capstan belt.
2. Unsolder the 2 motor leads from the mechanism
relay base plate A.
3. Remove
the 2 cup-tight
screws
(XKHPSD30P-
O8WSO),
and remove the capstan
motor from
chassis A.
4. Remove the 2 screws (KBPSD30PO5JO00), then
remove the capstan motor from the capstan mo-
tor fixing board.
Fitting
1. Fit the capstan motor to the capstan motor fix-
ing board
by means
of the
2 fixing
screws
(XBPSD30P05J00).
2. Check that the motor angle insulating plate is at-
tached, and fasten to chassis A with the 2 cup-
tight screws
(KHPSD30PO8WSO).
Wrap solder
the lead wires to the motor terminals, and insert
into the wire holders.
3. Solder the motor leads to the mechanism
relay
base plate.
4. After cleaning the capstan belt, capstan pulley
and capstan flywheel, fit the capstan belt.
Notes:
1. After fitting, be sure to operate the capstan mo-
tor to check there are no irregularities in the belt
travel or between the motor and pulley.
2. Check and adjust the servo circuit at the same
time.
3. Use only the specified screws for mounting.
If
other
screws
are
used,
the
motor
may
be
damaged.
Lead Wires
Interruption PWB
Capstan Motor
2 Motor Angle Bracket
Insulating Plates
Capstan Motor Angle Bracket
2 Screws
Tightening Torque Spec. 84 1 kg.cm.
Figure 32
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