VL-Z700S-T
VL-Z800S-S/E-S/E-T/Z900H-S
VL-Z950S-S/E-A/E-S/E-T/E-W
9
5-2. Cautions in handling the mechanism
(1) Cut washers removed at the time of part replacement etc. should be
replaced with new ones without fail.
(2) Because no volume adjustment is available in this mechanism, cleaning or
part replacement should be performed if the setting is not satisfied.
(3) About oil
a) Be sure to use the specified oil. (If any oil other than the specified oil is
used, various troubles will occur.)
b) When lubricating the bearing, be sure to oil free from foreign particles
such as dust. (If oil in which foreign particles such as dust are mixed is
used, it will cause wear and seizure to the bearing.)
c) The term "One drop of oil" here means the amount of oil on the point of
a needle etc. shown in Fig.1.
(4) Repairing of circuits, final adjustment of running system, etc. should be
performed with the cassette controller assembly installed in the mechanism.
(5) When operating the mechanism singly, apply voltage to the loading motor
to drive it. The voltage between the terminals should be 3 to 4V DC. (Do
not apply external voltage to the loading motor with the mechanism
connected with the main circuit board. Doing so could cause a failure.)
(Turning the gears forcedly by hand may cause them to get damaged.)
When placing the mechanism singly, use an appropriate spacer so that the
capstan motor is not rubbed.
(6) When installing the cassette controller, push the portion indicated by "A" in
Fig.2. Do not push other portions.
(7) Take care not to deform the components of the mechanism.
Fig. 2
Ø1.5 or less
Oil
Fig. 1
5. INSPECTION AND MAINTENANCE ITEMS AND INTERVALS
In order to maintain the quality of the mechanism section, perform the following maintenance and inspection. After repairing the
mechanism section, perform the following maintenance regardless of the number of hours of use by the user.
5-1. Maintenance and inspection list
Tape running section (See7-3.)
Swing arm
S reel table, Tu reel table
Running system
• • • Replace. • • • Clean. • • • Lubricate. • • • Check.
Note:
If no envelope output is obtained
in spite of the video head being
c l e a n e d , r e p l a c e t h e d r u m
component.
(If the envelope output is normal,
refer to "10. USEFUL TIPS".)
Performance check
[Oil] Cosmo Hydro HV22
[Grease] Molykote YM-103
Sankei Chemical CFD-409Z
Driving system
Number of hours of use (h)
500 1,000 1,500 2,000 3,000
Symptoms observed at the
time of maintenance
Notes and remarks
Inspection and
maintenance location
[Loctite adhesive] Three Bond 1401B
[Cleaning liquid] Industrial ethyl alcohol
• Tape not running
• Tape sagged
• Block noise
• Abnormal noise
• Replace if any abnormal
condition is found.
• Apply oil.
[Oil]
Cosmo Hydro HV22
Note:
Apply oil to the shaft and
lightly wipe it off with a cloth.
•
Abnormal noise
• Ejecting cannot be made.
•
Mode cannot be set.
• Replace if any abnormal
condition (noise etc.) is found.
• Tape not running
• Tape sagged
• Damage to tape
• Abnomaly in reproduced
picture
• If a part is out of spec, replace
it.
PB, VS/R and loading back tension
S reel table unloaded torque
PB and VS/R winding torque
Abnormal noise
Loading motor
Mode SW
Center gear boss
Relay pulley shaft
Capstan motor (Timing belt)
Pinch roller
Drum section, Video head
(See 7-3.)
<Rollers>
• Replace if abnormal rotation or swing (large) is found.
<Others>
• Cleans the portions that come in contact with the tape (the lower
drum helical portion in particular). Use the specified cleaning liquid.
• Block noise
• Clogging of head
• Damage to tape
