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To obtain full function and maximum performance from
the set, and to stop it getting dirty or scratched, we
recommend that you carry out the following maintenance
procedures and regular checks. The maintenance checks
described in the following section should also be carried
out without fail after carrying out any repairs to the set.

• Always use the specified brands of oil and grease. If you

use a grease with the wrong viscosity, for example, this
can lead to all sorts of problems. Be careful to keep the
oil and grease free of dust and foreign bodies.

• A “drop” of oil is the amount of oil remaining on the tip of

a rod with a diameter of 1.5mm after it is dipped in oil to
a depth of 1cm and then taken out.

Fig.1-1-1

Clean Check

Oil

                         Hours of use (H)

Part maintained

500

1000

1500

2000

2500

3000

3500

4000  4500

5000

Remarks 

Tape guide
ACE head, full erase head

Tape path

Cylinder (drum)

 

system

Cleaner roller assembly
Pinch roller
Reel table 

Drive

Reel belt

system

Relay gear, Pulley shaft, Gear shaft
Loading motor
Back tension

Perform- Brake system
ance
checks

FWD, REW, PLAY torque,
REV torque

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(   )

(   )

(   )

(   )

(   )

(   )

(   )

(   )

The life of parts varies 
enormously, depending 
on the environment in 
which the part is used. 

Playback tension torque: 
30 to 50g/cm

FWD: 600g/cm or over
REW: 600g/cm or over 
PLAY (SP mode): 
80 to I 40g/cm 
REV: 120 to 220g/cm 

Moisten a chamois with methyl alcohol and clean the video
head (including the Hi-Fi audio head) and the tape path
surface of the cylinder. Be sure to wipe horizontally in
relation to the video head. If you wipe vertically, or use
excessive force, you can damage the video head.

Clean the pinch roller, the capstan shaft, the tape guides,
the FE head, the ACE head, the reel table, the pulley and
the reel belt with a soft cloth, or chamois, moistened with
methyl alcohol.

Tape path surface

Video head

Cylinder
(Drum)

Select a PAL or NTSC alignment tape from the list below, according to the transmission system of the VCR you are
repairing.
PAL: For models with 625 scanning lines and a field frequency of 50Hz
NTSC: For models with 525 scanning lines and a field frequency of 60Hz

No.

Tool

Tool No.

Remarks

1

Alignment tape NTSC (KRV51N2)

8-192-605-32

NTSC-NORMAL

2

Alignment tape PAL (KRV-51P)

8-192-605-36

PAL-NORMAL

3

Alignment tape NTSC (KRV-52NE)

8-192-605-41

Used to adjust the tape path

4

Alignment tape PAL (KRV-52PL)

8-192-605-46

Used to adjust the tape path

5

Eccentric screw driver

J-6082-044-A

Used to adjust the tape path

6

Nut box

J-6082-045-A

Used to adjust the height of the
lever load assembly

7

Torque dial gauge

H-7099-039-H

Used to measure reel winding
torque

8

Torque dial gauge adaptor

H-7099-035-H

Used to measure reel winding
torque

9

Cassette torque meter(VHJ-063S)

J-6082-011-A

Used to measure back tension
torque

10

Load lever assembly height adjustment tool

J-6090-055-A

Used to adjust the height of the
load lever assembly

11

Torque gauge screwdriver

J-6082-047-A

Used to adjust the tightening torque
of screws

12

3 mm dia. bit for torque screwdriver

J-6082-048-A

Used to replace the bit of the torque
gauge screwdriver

13

Oil

7-661-018-18

14

Grease

7-662-010-04

15

Grease

J-6090-014-A

16

Relay cables

J-6090-057-A

Relay cables of mechanism and
CP-1 PWB assembly

8-192-605-32 (KRV-51N2)
8-192-605-36 (KRV-51P)
8-192-605-41 (KRV-52NE)
8-192-605-46 (KRV-52PL)

J-6082-044-A

J-6090-055-A

J-6082-045-A

J-6082-047-A

J-6090-014-A (EM-L30LG)

J-6082-048-A

J-6082-011-A (VHT-063S)

7-662-010-04 (SGL-505)

No. 1–4

No. 5

No. 6

No. 7, 8

No. 9

No. 10

No. 11

No. 12

No. 13

No. 14

No. 15

No. 16

J-6090-057-A

7-661-018-18 (NT-68)

H-7099-039-H

H-7099-035-H

Fig.1-2-1