Hitachi DV-RV8500E, Service Manual

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5 - 8
Adjustment / Maintenance > Maintenance
5-4 Maintenance
5-4-1 Maintenance and inspection
The deck mechanism uses very precise components to ensure the compatibility between VCR
models: If any of the mechanical components are dirty or the performance is degraded, the
symptoms will be similar to those when the mechanism is faulty.
For clear images, it is necessary to periodically clean and lubricate the mechanism and replace any
faulty components.
(1) Reference for maintenance and inspection
The time for maintenance and inspection depends on the environment and the way the VCR is
used: For ordinary home use, maintenance and inspection every 1,000 hours will ensure clear images.
Fig. 5-4-1 Cleaning Method using Cleaning Cloth
Time used per day
Approx. 1 hour
Approx. 2 hours
Approx. 3 hours
Period for reaching 1,000 hours
Approx. 3 years
Approx. 1.5 years
Approx. 1 year
(2) Items necessary for maintenance and inspection
1) Head cleaning kit
2) Oil and grease for maintenance
3) Alcohol
4) Cleaning cloth
(3) Cleaning video heads
It is recommended that you use a generally available cleaning tape to clean the heads.
If noise cannot be removed completely with a cleaning tape, use a cleaning cloth to clean the heads
and transport system.
[Cleaning method using cleaning tape]
Play back the cleaning tape in the same way as an ordinary tape for approx. 30 seconds.
[Cleaning method using cleaning cloth]
1) Lightly fit the cleaning cloth to the head, and turn the rotating cylinder gently to the left and
right. Turn the rotating cylinder one turn to also clean its outer circumference. (Cleaning with
cleaning cloth moistened with alcohol is more effective.)
2) Do not use a cleaning cloth to which oil adheres or a dirty one.
Cleaning cloth
Moisten with alcohol.
Lightly fit cleaning cloth to the head tip and
turn the cylinder to the left and right.
Head Tip
Drum Ass'y