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DV-NC55U/C/M
8-2. MAINTENANCE CHECK ITEMS AND EXECUTION TIME
Perform the maintenance with the regular intervals as follows so as to maintain the quality of machine.
Parts
Guide roller ass'y
Sup guide shaft
Reverse guide
Slant pole on pole base
Full erase head
A/C head
Upper and lower drum ass'y
Capstan D.D. motor
Pinch roller
Reel belt
Tension band ass'y
Loading motor
Idler ass'y
Limiter pulley
Supply/take-up main brake levers
AHC (Automatic head cleaner)
NOTE
: Part replacement.
<Specified> Cleaning liquid Industrial ethyl alcohol
* This mechanism does not need electric adjustment with variable resistor. Check parts. If any deviation is found,
clean or replace parts.
Video head cleaning procedure
1. Apply one drop of cleaning liquid to the cleaning paper with the baby oiler.
2. Gently press the cleaning paper against the video head to fix your finger, and move the upper drum so that each head
is passed to and fro 5 times (do not move the cleaning paper).
3. Wipe with the dry cleaning paper.
Notes :
• Use the commercially available ethanol of Class 1 as
cleaning liquid.
• Since the video head may be damaged, do not move up
and down the cleaning paper.
• Whenever the video head is cleaned, replace the clean-
ing paper.
• Do not apply this procedure for the parts other than the
video head.
500
1000
Maintained
hrs.
hrs.
: Cleaning
1500
2000
Possible symptom
hrs.
hrs.
encountered
Lateral noises Head
occasionally blocked
Color and beating
Small sound or sound
distortion
Poor S/N ratio, no color
Poor flatness of the
envelope with alignment
tape
No tape running,
uneven color
No tape running, tape
slack
No tape running, tape
slack, no fast forward/
rewind motion
Screen swaying
Cassette not loaded or
unloaded
No tape running, tape
slack
Tape slack
: Apply grease
Gently press the cleaning paper to
fix with your finger, and rotate the
upper drum to clean.
Move to and fro 5 times for each head.
(Do not move the cleaning paper.)
Parts Code
ZPAPRA56-001E
ZOiLR-02-24TE
16
Remarks
Abnormal rotation or significant
vibration requires replacement.
Clean tape contact part with the
specified cleaning liquid.
Clean tape contact area with the
specified cleaning liquid.
Clean rubber and rubber contact
area with the specified cleaning
liquid.
Replace the roller of the cleaner
when it wears down.
Just change the AHC roller
assembly for new one.
Rotate the upper drum
with one hand.
Description
Cleaning Paper
Babe Oiler (Spoit)
Code
AW
AH
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