JVC KV-V8 Service Manual page 13

2. Cleaning
Regular cleaning of the transport system parts is desirable
but practically impossible. So make it a rule to carry out clean-
ing of the tape transport system whenever the machine is
serviced.
When the video head, tape guide and/or brush get soiled,
the playback picture may appear inferior or at worst disap-
pear, resulting in possible tape damage.
(1) When cleaning the upper drum (especially the video
head), soak a piece of closely woven cloth or Kimu-wipe
with alcohol and while holding the cloth onto the upper
drum by the fingers, turn the upper drum
counterclockwise.
Note:
• Absolutely avoid sweeping the upper drum vertically
as this will cause damage to the video head.
(2) To clean the parts of the tape transport system other than
the upper drum, use a piece of closely woven cloth or a
cotton swab soaked with alcohol.
(3) After cleaning, make sure that the cleaned parts are com-
pletely dry before using the video tape.
3. Lubrication
With no need for periodical lubrication, you have only to lu-
bricate new parts after replacement. If any oil or grease on
contact parts is soiled, wipe it off and newly lubricate the
parts.
Note:
• See the "mechanism assembly" diagram of the parts
list for the lubricating or greasing spots, and for the
types of oil or grease to be used.
• Grease is not required for a replacement cassette hous-
ing assembly, as this has been applied at the factory.
4. Suggested servicing schedule for main components
The following table indicates the suggested period for such
service measures as cleaning,lubrication and replacement.
In practice, the indicated periods will vary widely according
to environmental and usage conditions.However, the indi-
cated components should be inspected when a set is brought
for service and the maintenance work performed if neces-
sary. Also note that rubber parts may deform in time,even if
the set is not used.
System Parts Name
Upper drum assembly
A/C head
Lower drum motor assembly
Pinch roller arm assembly
Full erase head
Tension arm assembly
Guide arm assembly
Capstan motor
Belt (Capstan)
Belt (Loading motor)
Loading motor
Reel disk (supply, take up)
Clutch unit (supply, take up)
Worm gear assembly
Control plate
Slide plate
Brush
Tension band assembly
Rotary encoder
¤
: Cleaning
R
: Inspection or replacement if necessary
Table 2-1-5a
Operation Hours
~1000H ~2000H
2-3