Read Sharp DV-NC55 (serv.man7) Service Manual online
15
DV-NC55S/H
DV-NC60H
DV-NC60H
12.
JiGRVGH-F18
BU
11.
JiGDRiVER-6
BM
10.
JiGDRiVERH-4
AP
4.
Torque Driver
JiGTD1200
CB
8. ADJUSTMENT, REPLACEMENT AND ASSEMBLY OF MECHANICAL UNITS
The explanation given below relates to the on-site general service (field service) but it does not relates to the adjustment
and replacement which need high-grade equipment, jigs and skill. For example, the drum assembling, replacement and
adjustment service must be performed by the person who have finished the technical courses.
and replacement which need high-grade equipment, jigs and skill. For example, the drum assembling, replacement and
adjustment service must be performed by the person who have finished the technical courses.
8-1. MECHANISM CONFIRMATION ADJUSTMENT JIG
So as to perform completely the mechanism adjustment prepare the following special jigs. So as to maintain the initial
performance of the machine the maintenance and check are necessary. Utmost care must be taken so that the tape is
not damaged. If adjustment needs any jig, be sure to use the required jig.
performance of the machine the maintenance and check are necessary. Utmost care must be taken so that the tape is
not damaged. If adjustment needs any jig, be sure to use the required jig.
JiGTG1200
CN
JiGMP0001
BY
1.
Torque Cassette Meter
JiGVHT-063
CZ
No.
Jig ltem
Part No.
Code
Configuration
Remarks
JiGTG0090
CM
3.
Torque Gauge Head
JiGTH0006
AW
JiGRH0002
BR
JiGSG2000
BS
JiGSG0300
BF
7.
JiGADP0003
BK
Tension Gauge
These Jigs are used for checking
and adjusting the reel disk height.
and adjusting the reel disk height.
When fixing any part to the threaded
hole using resin with screw, use the
jig. (Specified torque 5 kg)
hole using resin with screw, use the
jig. (Specified torque 5 kg)
This cassette torque meter is used for check-
ing and adjusting the torque of take-up for
measuring tape back tension.
ing and adjusting the torque of take-up for
measuring tape back tension.
These Jigs are used for checking
and adjusting the torque of take-up
and supply reel disks.
and adjusting the torque of take-up
and supply reel disks.
Master Plane Jig and
Reel Disk Height
Adjusting Jig
Reel Disk Height
Adjusting Jig
Pinch pressing force
measuring jig
measuring jig
This Jig is used with the tension
gauge. Rotary transformer clearance
adjusting jig.
gauge. Rotary transformer clearance
adjusting jig.
There are two gauges used for the
tension measurements, 300 g and
2.0 kg.
tension measurements, 300 g and
2.0 kg.
8.
JiGDRiVER11055
AR
Reverse guide height
adjustment box driver
adjustment box driver
This Jig is used for height adjustment of the
reverse guide (for reverse guide height ad-
justment).
reverse guide (for reverse guide height ad-
justment).
VROUBZFS
CK
VROCPSV
This screwdriver is used for adjusting the
guide roller height.
guide roller height.
For X value adjustment
This Jig is used for height
adjustment of the reverse guide.
adjustment of the reverse guide.
X value adjustment
gear driver
gear driver
Reverse Guide Height
Adjusting Jig
Adjusting Jig
2.
Torque Gauge
6.
5.
9.
Alignment Tape
Guide roller height
adjustment driver
adjustment driver
Video
Audio
Track
625 Monoscope
6kHz
35
µ
m
625 Monoscope
6kHz
and
and
49
µ
m
Colour bar
1kHz
16
DV-NC55S/H
DV-NC60H
DV-NC60H
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.
NOTE : Part replacement. : Cleaning : Apply grease
<Specified> Cleaning liquid Industrial ethyl alcohol
<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.
Maintained
Parts
Remarks
500
hrs.
hrs.
1000
hrs.
hrs.
1500
hrs.
hrs.
2000
hrs.
hrs.
Possible symptom
encountered
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
Color and beating
Small sound or sound
distortion
distortion
Poor S/N ratio, no color
Poor flatness of the
envelope with alignment
tape
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
uneven color
No tape running, tape
slack
No tape running, tape
slack, no fast forward/
rewind motion
Lateral noises Head
occasionally blocked
occasionally blocked
Abnormal rotation or significant
vibration requires replacement.
vibration requires replacement.
Clean tape contact part with the
specified cleaning liquid.
specified cleaning liquid.
Clean tape contact area with the
specified cleaning liquid.
specified cleaning liquid.
Clean rubber and rubber contact
area with the specified cleaning
liquid.
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.
when it wears down.
Just change the AHC roller
assembly for new one.
Screen swaying
Cassette not loaded or
unloaded
unloaded
No tape running, tape
slack
slack
Tape slack
AHC (Automatic head cleaner)
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
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
• 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.
Parts Code
Description
Code
ZPAPRA56-001E
Cleaning Paper
AW
ZOiLR-02-24TE
Babe Oiler (Spoit)
AH
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.)
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.)
Rotate the upper drum
with one hand.
with one hand.
17
DV-NC55S/H
DV-NC60H
DV-NC60H
8-3. FUNCTION OF MAJOR MECHANICAL PARTS (TOP VIEW)
No.
Function
No.
Function
1
Full erase head
2
Supply pole base ass’y
3
Tension arm ass’y
4
Idler wheel ass’y
5
Pinch drive lever ass’y
6
Supply reel disk
7
Supply main brake ass’y
8
Take-up main brake ass’y
9
Pinch drive cam
10
A/C Head ass’y
11
Reverse guide lever ass’y
12
Casecon drive gear
13
Take-up reel disk
14
Pinch roller lever ass’y
15
Drum ass’y
16
Loading motor
17
Drum motor
18
Take-up pole base ass’y
17
15
10
11
5
9
14
12
8
16
13
4
6
2
7
3
1
18
18
DV-NC55S/H
DV-NC60H
DV-NC60H
FUNCTION OF MAJOR MECHANICAL PARTS (BOTTOM VIEW)
No.
Function
No.
Function
19
Slow brake
20
Master cam
21
Capstan D.D. motor
22
Reel belt
23
Clutch lever
24
Limiter pulley ass'y
12
Casecon drive gear
26
Shifter
26
24
21
22
19
20
12
23