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The explanation given below relates to the on-site general service (field service) but it does not relates to the adjustment
and replacement which need high-grade equipment, jigs and skill. For example, the drum assembling, replacement and
adjustment service must be performed by the person who have finished the technical courses.

So as to perform completely the mechanism adjustment prepare the following special jigs. So as to maintain the initial
performance of the machine the maintenance and check are necessary. Utmost care must be taken so that the tape is
not damaged. If adjustment needs any jig, be sure to sue the required jig.

JiGTG1200

CN

JiGMP0001

BY

1.

Torque Cassette Meter

JiGVHT-063

CZ

JiGTG0090

CM

3.

Torque Gauge Head

JiGTH0006

AW

5.

JiGRH0002

BR

JiGSG2000

BS

JiGSG0300

BF

6.

7.

JiGADP003

BK

2.

Torque Gauge

Tension Gauge

These Jigs are used for checking
and adjusting the reel disk height.

When fixing any part to the threaded
hole using resin with screw, use the
jig. (Specified torque 5 kg)

This cassette torque meter is used for check-
ing and adjusting the torque of take-up for
measuring tape back tension.

These Jigs are used for checking
and adjusting the torque of take-up
and supply reel disks.

Master Plane Jig and
Reel Disk Height
Adjusting Jig

Pinch pressing force
measuring jig

This Jig is used with the tension
gauge. Rotary transformer clearance
adjusting jig.

There are two gauges used for the
tension measurements, 300g and
2.0kg.

4.

Torque Driver

JiGTD1200

CB

8.

JiGDRiVER11055

AR

Reverse guide height
adjusting box driver

This Jig is used for height adjustment of the
reverse guide (for reverse guide height ad-
justment).

Guide roller height
adjustment drive

This screwdriver is used for adjusting the
guide roller height.

X value adjustment
gear type screw driver

This Jig is used for height
adjustment of the reverse guide.

Reverse Guide Height
Adjusting Jig

Alignment Tape                      VROCPSV       CK

10.

JiGDRiVERH-4

AP

12.

JiGRVGH-F18

BU

9.

11.

JiGDRiVER-6

BM

For X value adjustment

Perform the maintenance with the regular intervals as follows so as to maintain the quality of machine.

Guide roller ass’y

Sup guide shaft

Retaining guide

Slant pole on pole base

Full erase head

Colour and beating

Upper and lower drum ass’y

Pinch roller

Capstan D.D. motor

Reel belt

Idler ass’y

Tension band ass’y

Screen swaying

Loading motor

Limitter pulley

Supply/take-up main brake levers

Tape slack

AHC (Automatic Head Cleaner)

A/C head

NOTE          : Part replacement.        : Cleaning        : Apply grease
<Specified> Cleaning liquid Industrial ethyl alcohol

* This mechanism does not need electric adjustment with variable resistor. Check parts. If any deviation is found, clean

or replace parts.

Lateral noises Head
occasionally blocked

Small sound or sound
distortion

Poor S/N ratio, no colour
Poor flatness of the enve-
lope with alignment tape

No tape running, uneven
colour

No tape running, tape
slack

No tape running, tape
slack, no fast forward/
rewind motion

Cassette not loaded or
unloaded

No tape running, tape
slack

Clean tape contact part with the
specified cleaning liquid.

Abnormal rotation or significant vibra-
tion requires replacement.

Clean tape contact area with the
specified cleaning liquid.

Replace the roller of the
cleaner when it wears
down.
Just change the AHC roller as-
sembly for new one.

Clean rubber and rubber con-
tact area with the specified clean-
ing liquid.

• Reassembly
1. Before installing the cassette housing control, short-

circuit P811 provided at the center (when facing to the
main PWB), press the EJECT button. The casecon drive
gear turns and stops when the positioning mark ap-
pears. Engage two teeth of casecon drive gear with the
three teeth of casecon drive angle gear, and set on the
mechanism chassis as shown below.

2. Install in the reverse order of removal.

Notes:
1. When fitting the S/E sensor holder to the cassette

controller frame L/R, take care.

2. Misengagement of teeth of casecon drive gear and drive

angle gear causes malfunction. (The cassette cannot be
set, load and ejection are repeated).

3. In the case when you use the magnet screw driver, never

approach the magnet driver to the A/C head, FE head,
and drum.

4. When installing or removing, take care so that the

cassette housing control and tool do not contact the
guide pin or drum.

5. After installing the cassette housing control once per-

form cassette loading operation.

1. Remove the full-surface panel.
2. Short-circuit P811.
3. Plug in the power cord.
4. Turn off  the power switch.

(The pole bases move into U.L.position.)

5. Open the lid of a cassette tape by hand.
6. Hold the lid with two pieces of vinyl tape.
7. Set the cassette tape in the mechanism chassis.
8. Stabilize the cassette tape with a weight (500g) to

prevent floating.

9. Turn on the power switch.
10. Perform running test.

• Removal
1. In the cassette removing mode remove the cassette.
2. Unplug the power cord.
3. Remove in the following numerical order.

a) Remove two screws 

1

.

b) Slide and pull up the cassette housing control.

1

Casecon
drive gear

Casecon drive
angle gear

500g

Mechanism chassis

Weight to prevent
float (500g)

Note:
The weight should not be more than 500g.

To take out the cassette tape.
1. Turn off the power switch.
2. Take out the cassette tape.

• Removal
1. Remove the cassette housing control assembly.
2. Pull the tension band out of the tension arm ass'y.
3. Remove the Supply/Take-up main brake ass'y.
4. Open the hook at the top of the reel disk, and remove the

reel disk.

Note:
Take care so that the tension band ass'y and main brake
ass'y (especially soft brake) are not deformed.

4. Assemble the Supply main brake ass'y.
Notes:
1. When installing the reel disk, take due care so that the

tension band ass'y is not deformed and grease does no
adhere.

2. Do not damage the Supply main brake ass'y. Be careful

so that grease does not adhere to the brake surface.

• Reassembly (Take-up reel disk)
1. Clean the reel disk shaft and apply grease (SC-141) to

it.

2. Align the phase of the reel disk to that of the reel relay

gear and to install a new take-up reel disk onto the shaft.

3. Check the reel disk height and reassemble the take-up

main brake ass'y.

Note:
1. Take care so that the Take-up main brake ass'y is not

damaged. Take care so that grease does not adhere the
brake surface.

2. After reassembly, check the video search rewind back

tension (see page 15), and check the brake torque (see
page 17).

1. Set the master plane with due care so that it does not

contact the drum.

2. When putting the master plane, shift the reverse guide

a little in the loading direction. Care must be taken since
excessive shift results in damage.

Note:
Check that the reel disk is lower than part A but higher than
part B. If the height is not correct, readjust the reel disk
height by changing the poly-slider washer under the reel
disk.

Note:
When the tension band ass'y is pressed in the direction of
the arrow for removal, the catch is hard to be deformed.

• Reassembly (Supply reel disk)
1. Clean the reel disk shaft and apply grease (SC-141) to

it.

2. Match the phases of reel disk and reel relay gear, and set

the new reel disk.

3. After checking the reel disk height, wind the tension

band ass'y around the reel disk, and insert into the hole
of tension arm ass'y.

Tension arm ass'y

Supply reel disk

Take-up reel disk

Master plane

Reverse
guide

Position
pin

Supply main brake ass'y

Supply reel disk

Cassette lock
release shaft

Take-up reel disk

Tension band ass'y

Take-up main brake ass'y