Table of Contents
Advertisement
www.freeservicemanuals.info
5. INSPECTION AND MAINTENANCE ITEMS AND INTERVALS
In order to keep the mechanical section always in good condition, perform the following inspection and maintenance at regular intervals.
In addition, after repair, perform the following maintenance items regardless of how long the user has been using the unit.
5-1. List of inspection and maintenance items
Inspection and
maintenance location
Tape running section (see section 7-3)
Drum section, Video head
(see section 7-3)
Timing belt
Pinch roller
Capstan motor
Swing arm
S reel base, Tu reel base
Center pulley shaft
Intermediate pulley shaft
Swing arm boss
Intermediate gear A shaft,
Intermediate gear B shaft
Loading motor
Mode switch
Abnormal noise
PB · VS/R winding torque
PB · VS/R · loading back tension
Tu reel base ratchet torque
S reel base no-load torque
5-2. Precautions
(1) When replacing any part, always replace the cut washer that was
removed with a new one.
(2) This mechanism does not have control adjustment. If the control
cannot be set as required, clean and or replace parts.
(3) On the oil
a) Always use the specified oil. (Using another kind of oil can cause
various kinds of trouble.)
b) Always use clean oil, without any mixed-in dirt, to lubricate bearings.
(Using oil with dirt mixed in can cause the bearings to wear or to
stick.)
c) One drop of oil is the amount shown in the Fig. 1, on the point of a
pin.
(4) Perform circuit repair, tape running adjustment, etc. with the cassette
controller assembly attached to the mechanism.
(5) When operating the mechanism separately, apply voltage to the
loading motor. However, the terminal voltage must be DC3V~4V.
(When the mechanism is connected to the main PWB, do not apply
external voltage to the loading motor. It may cause a trouble.)
(Forcing the gears to turn by hand entails danger of breakage.)
If the mechanism is separated from the unit, the capstan motor may rub
and be damaged if spacing under the mechanism is inadequate.
(6) To install the cassette controller, push section A in the Fig. 2. Do not
push anything else.
(7) Do not deform any of the mechanical parts.
Time of use (h)
500
1,000 1,500 2,000 3,000
<Rollers>
• Replace if there is anything abnormal in the rotation, or if there is run-out
(that becomes large).
<Other than the above>
• Clean the section that contacts the tape (especially the lower drum helical
section). Use the specified cleaning liquid.
[Oil] Cosmo Hydro HV22
[Grease] Moly Coat YM-103
Published in Heiloo, Holland
7
• • • Replace.
• • • Clean.
Symptoms that indicate
need for maintenance
• Block-type noise
Note:
• Head hole clogging
Replace the drum ass'y if the
• Tape damage
video head is cleaned but the
envelope still does not appear.
(When the envelope is normal,
refer to "10. USEFUL TIPS".)
• The tape fails to run.
• Replace if there is anything
• The tape becomes slack.
• Block-type noise
• Abnormal noise
•
Abnormal noise
• Lubricate with oil.
[Oil]
Note: Apply oil to the shaft, then
• Replace if anything is abnormal
• Cannot eject.
(including the noise).
• Fails to enter a mode.
• The tape fails to run.
• Replace any part that fails to
• The tape becomes slack.
perform within the standard.
• Tape damage
• The play-back image is
.
abnormal
[Screw lock] Three Bond 1401B
[Cleaning liquid] Industrial-use ethyl alcohol
Oil
1.5mm diameter or less
VL-NZ10S/H/E
12/9/2016
• • • Lubricate.
• • • Check.
Remarks
abnormal.
Cosmo Hydro HV22
wipe lightly with a cloth.
Fig. 1
Fig. 2
Advertisement
Table of Contents
