2-6
2.4.4
Oiling and greasing
Table 2-4-2 shows the oil and greases used with the set.
1) Oiling should be performed periodically. Oil the shafts by
referring to the maintenance table.
2) After replacing a part, grease the required points. For the
parts to be greased see the exploded diagram in chapter 5,
“DISASSEMBLY DRAWINGS AND PARTS LIST”.
3) As Hanal separates over time, be sure to mix it (shake) well
before use.
4) Take care not to leave grease or oil on the tape transport
parts which come into contact with the tape or on the brake
pads.
5) Take care not to apply too much oil or grease. The standard
oiling quantity is one drop and the standard greasing quan-
tity is the quantity with which the grease does not overflow.
Table 2-4-2
Classification
Oil
Grease
Name
Cosmo Hydro HV100
Maltemp SH-P
Hanal
Part No.
YTU94027
KYODO-SH-P
RX-410R
2.4.3
Cleaning
The mechanism incorporates a video head cleaner that is effec-
tive for the removal of magnetic dust, etc. However, tape lubri-
cant adhering to the head surface produces a spacing loss, it is
recommended to polish the heads using a head cleaning tape.
When the video heads become soiled an increase in the error
rate results. Eventually, when the error rate increase is too much
to be corrected by the error correction circuit, block noise will
be observed in the picture.
1) Cleaning the video heads
Use the DVC cleaning cassette for cleaning the video heads.
Always be sure to use the cleaning cassette, Part No. M-
DV12CLAUX.
The video heads should be cleaned periodically. Moreover, care
should be taken about the operating environment as the tape
running time standard varies accordingly. Please refer to “Pre-
cautions for Use of Head Cleaning Tape” in the instructions.
Caution
As the DVC cleaning tape has a much higher lap-
ping effect than VHS cleaning tapes, frequent use
of the DVC cleaning tape will reduce the head serv-
ice life. Do not play the DVC cleaning tape for more
than 10 seconds per run or for more than 4 times
per cleaning session.
The cleaning tape can be used effectively for up to
about 4 passes. It cannot improve the cleaning ef-
fect even if it is run for more than 4 times.
Fig. 2-4-1
3) Cleaning the tape transport system
Moisten the tip of a cotton swab with alcohol and use it to
clean the tape transport parts. Take special care of the TU/
SUP guide roller flanges and the rear sides of the inclined
poles, as these are the parts that most frequently collect
magnetic dust.
Caution
Do not wipe the capstan shafts using alcohol. Other-
wise, the oil in the bearings may be diluted by the
alcohol and become attached to the tape.
Fig. 2-4-2 Guide Roller
Take special care.
High-quality paper
Carefully clean the lead tape inlet/outlet.
Upper drum
Apply lightly
.
Head tip
Core drum
Toothpick
Lead
Lower drum
2) Cleaning the upper/lower drums
Use a cleaning cloth or high-quality paper sheet to clean the
upper drum. Moisten the cloth or paper sheet with a small
amount of ethyl alcohol, apply it lightly against the upper
drum while turning it by hand.
After this operation, wipe it with a dry cloth or paper sheet
without alcohol. Be sure to play the cleaning tape to its end.
The lower drum tends to gather magnetic dust, etc. in its
lead section, and linearity cannot be achieved if this becomes
excessively dirty. The tape inlet and outlet areas are con-
taminated particularly easily, causing trouble such as drop-
out in FM signal reproduction, block noise on one side of a
monitored picture, absence of audio output or incapability of
time code readout. To clean the lead section, use a tooth-
pick and rub lightly along the lead section. Be careful not to
scratch the video head when this is done.