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25

24

21

22

19

20

12

23

19

Slow brake

20

Master cam

21

Capstan D.D. motor

22

Reel belt

23

Clutch lever

24

Limiter pulley ass'y

12

Casecon drive gear

25

Shifter

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 use 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, 300 g and
2.0kg.

4.

Torque Driver

JiGTD1200

CB

9.

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.

For X value adjustment

X value adjustment
gear type screw driver

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

13.

JiGRVGH-F18

BU

12.

JiGDRiVER-6

BM

Reverse Guide Height
Adjusting Jig

11.

JiGDRiVERH-4

AP

Video

Audio

Track

625 Monoscope

6kHz

35

µ

m

625 Monoscope

6kHz

and

and

49

µ

m

Colour bar

1kHz

VROUBZFS

VROCPSV

10. Alignment Tape

CK

Video head cleaning procedure
1. Apply one drop of cleaning liquid to the cleaning paper with the baby oiler.
2. Gently press the cleaning paper against the video head to fix your finger, and move the upper drum so that each head

is passed to and from 5 times (do not move the cleaning paper).

3. Wipe with the dry cleaning paper.

Notes :
• Use the commercially available ethanol of Class 1 as

cleaning liquid.

• Since the video head may be damaged, do not move up

and down the cleaning paper.

• Whenever the video head is cleaned, replace the clean-

ing paper.

• Do not apply this procedure for the parts other than the

video head.

Parts Code

Description

Code

ZPAPRA56-001E

Cleaning Paper

AW

ZOiLR-02-24TE

Babe Oiler (Spoit)

AH

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.

Guide roller ass’y

Sup guide shaft

Reverse guide

Slant pole on pole base

Full erase head

A/C head

Upper and lower drum ass’y

Capstan D.D. motor

Pinch roller

Reel belt

Tension band ass’y

Loading motor

Idler ass’y

Limiter pulley

Supply/take-up main brake levers

AHC (Automatic Head Cleaner)

color and beating 

Small sound or sound 
distortion

Poor S/N ratio, no color
Poor flatness of the 
envelope with alignment 
tape

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

Lateral noises Head 
occasionally blocked

Abnormal rotation or significant 
vibration requires replacement.

Clean tape contact part with the 
specified cleaning liquid.

Clean tape contact area with the 
specified cleaning liquid.

Clean rubber and rubber contact 
area with the specified cleaning 
liquid.

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

Screen swaying

Cassette not loaded or 
unloaded

No tape running, tape 
slack

Tape slack

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

Gently press the cleaning paper to 
fix with your finger, and rotate the 
upper drum to clean.
Move to and from 5 times for each head.
(Do not move the cleaning paper.)

Rotate the upper drum 
with one hand.

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

circuit TP801 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 TP801.
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.