Sharp 27DV-S100 Service Manual page 27

MAINTENANCE CHECK ITEMS AND EXECUTION TIME
Perform the maintenance with the regular intervals as follows so as to maintain the quality of machine.
Maintained
Ref.No.
Parts
49 Guide roller ass'y
— Sup guide shaft
19 Reverse guide
7,8 Slant pole on pole base
58 Full erase head
59 A/C head
63 Upper and lower drum ass'y
61 Capstan D.D. motor
12 Pinch roller
34 Reel belt
1 Tension band ass'y
60 Loading motor
46 Idler ass'y
48 Limiter pulley
24,25 Supply/take-up main brake levers
26 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 for 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
cleaning paper.
• Do not apply this procedure for the parts other than
the video head.
500 1000 1500 2000 Possible symptom
hrs. hrs. hrs. hrs.
Lateral noises Head
occasionally blocked
Colour and beating
Small sound or sound
distortion
Poor S/N ratio, no
colour Poor flatness
of the envelope with
alignment tape
No tape running,
uneven colour
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
: Cleaning : Apply grease
Gently press the cleaning paper to
fix with your finger, and rotate the
upper drum to clean.
Move to and for 5 times for each head.
(Do not move the cleaning paper.)
ZPAPRA56-001E
ZOiLR-02-24TE
27
encountered
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.
Parts Code
Cleaning Paper
Babe Oiler (Spoit)
27DV-S100
27DV-CS10
Remarks
Description