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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
Inspection and
maintenance location
Tape running section (See7-3.)
Drum section, Video head
(See 7-3.)
Pinch roller
Capstan motor (Timing belt)
Swing arm
S reel table, Tu reel table
Center gear boss
Relay pulley shaft
Loading motor
Mode SW
Abnormal noise
PB and VS/R winding torque
PB, VS/R and loading back tension
S reel table unloaded torque
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.
Number of hours of use (h)
500
1,000
1,500
2,000
<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.
[Oil] Cosmo Hydro HV22
[Grease] Molykote YM-103
9
• • • Replace.
• • • Clean.
Symptoms observed at the
time of maintenance
3,000
• Block noise
• Clogging of head
• Damage to tape
• Tape not running
• Tape sagged
• Block noise
• Abnormal noise
•
Abnormal noise
• Ejecting cannot be made.
•
Mode cannot be set.
• Tape not running
• Tape sagged
• Damage to tape
• Abnomaly in reproduced
picture
Sankei Chemical CFD-409Z
VL-Z100S-S/H-S/E-S
VL-Z300S-S/H-S/E-S
• • • Lubricate.
• • • Check.
Notes and remarks
Note:
If no envelope output is obtained
in spite of the video head being
cleaned, replace the drum
component.
(If the envelope output is normal,
refer to "10. USEFUL TIPS".)
• 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.
• Replace if any abnormal
condition (noise etc.) is found.
• If a part is out of spec, replace
it.
[Loctite adhesive] Three Bond 1401B
[Cleaning liquid] Industrial ethyl alcohol
Oil
Ø1.5 or less
Fig. 1
Fig. 2
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