Required Maintenance; Scheduled Maintenance; Supplies Required For Inspection And Maintenance; Maintenance Procedure - Aiwa HV-FX5850 Service Manual

MAINTENANCE/INSPECTION PROCEDURE

2. Required Maintenance

The recording density of a VCR(VCP) is much higher than
that of an audio tape recorder. VCR(VCP) components must
be very precise, at tolerances of 1/1000mm, to ensure
compatiblity with other VCRs. If any of these components
are worn or dirty, the symptoms will be the same as if the
part is defective. To ensure a good picture, periodic
inspection and maintenance, including replacement of worn
out parts and lubrication, is necessary.

3. Scheduled Maintenance

Schedules for maintenance and inspection are not fixed
because they vary greatly according to the way in which the
customer uses the VCR(VCP), and the environment in
which the VCR(VCP) is used.
But, in general home use, a good picture will be maintained
if inspection and maintenance is made every 1,000 hours.
The table below shows the relation between time used and
inspection period.
When
inspection is
About 1
necessary
year
Average
hours used
per day
One hour
Two hours
Three hours
Cleaning Patch
Table 1
About 3
About 18
years
months
Coat With Isopropyl Alcohol
4. Supplies Required for Inspection and
Maintence
(1) Grease : Kanto G-311G (Blue) or equivalent
(2) Isopropyl Alcohol or equivalent
(3) Cleaning Patches
(4) Grease : Kanto G-381(Yellow) : Used only for Reel S
and Reel T

5) Maintenance Procedure

5-1) Cleaning

(1) Cleaning video head
First use a cleaning tape. If the dirt on the head is too
stubborn to remove by tape, use the cleaning patch.
Coat the cleaning patch with Isopropyl Alcohol. Touch
the cleaning patch to the head tip and gently turn the
head(rotating cylinder) right and left.
(Do not move the cleaning patch vertically. Make sure
that only the buckskin on the cleaning patch comes into
contact with the head. Otherwise, the head may be
damaged.)
Thoroughly dry the head. Then run the test tape. If
lsopropyl Alcohol remains on the video head, the tape
may be damaged when it comes into contact with the
head surface.
(2) Clean the tape transport system and drive system, etc,
by wiping with a cleaning patch wetted with Isporopyl
Alcohol.
NOTES:
1 It is the tape transport system which comes into contact
with the running tape. The drive system consists of
those parts which moves the tape.
2 Make sure that during cleaning you do not touch the
tape transport system with the tip of a screw driver and
no that force is that would cause deforming or damage
applied to the system.
Touch this section of cleaning
patch to the head tip and gently
turn the Drum (Rotating Cylinder)
Fig. C-9-4
-100-
Drum
(Rotating Cylinder)
Head Tip