Sharp DV-NC70U Service Manual - Page 22

Reel Disk Replacement And Height, Check

Get Sharp DV-NC70U PDF manuals and user guides View all Sharp DV-NC70U manuals
Add to My Manuals
Save this manual to your list of manuals

Page 22 highlights

DV-NC70U/C DV-NC72U 8-7 REEL DISK REPLACEMENT AND HEIGHT CHECK • Removal 1. Remove the cassette housing control assembly. 2. Remove the Supply/Take-up main brake ass'y. 3. Remove tension band from the tension arm ass'y. 4. Remove the reel disk. Note: Take care so that the tension band ass'y and main brake ass'y are not deformed. TenTseionn arm ass'y Take-up main brake ass'y Supply main brake Tension band ass'y Supply reel disk Take-up reel disk Figure 8-4. • Reassembly (Supply reel disk) 1. Clean the reel disk shaft and apply grease (SC-141) to it. 2. Match the phases of reel disk and reel relay gear, and set the new reel disk. 3. After checking the reel disk height, wind the tension band ass'y around the reel disk, and hook to tension arm ass'y. 4. Assemble the Supply main brake ass'y. Notes: 1. When installing the reel disk, take due care so that the tension band ass'y is not deformed and grease does no adhere. 2. Do not damage the Supply main brake ass'y. Be careful so that grease does not adhere to the brake surface. • Reassembly (Take-up reel disk) 1. Clean the reel disk shaft and apply grease (SC-141) to it. 2. Align the phase of the reel disk to that of the reel relay gear and to install a new take-up reel disk onto the shaft. 3. Check the reel disk height and assemble the take-up main brake ass'y. Notes: 1. Take care so that the Take-up main brake ass'y is not damaged. Take care so that grease does not adhere the brake surface. 2. After reassembly, check the video search rewind back tension (see 8-12), and check the brake torque (see 816 ). • Height checking and adjustment Notes: 1. Set the master plane with due care so that it does not contact the drum. 2. When putting the master plane, shift the reverse guide a little in the loading direction. Care must be taken since excessive shift results in damage. Master plane Supply reel disk Cassette lock release shaft Take-up reel disk Figure 8-5. Note: • Check that the reel disk is lower than part A but higher than part B. If the height is not correct, readjust the reel disk height by changing the poly-slider washer under the reel disk. 22

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
22
DV-NC70U/C
DV-NC72U
8-7 REEL DISK REPLACEMENT AND HEIGHT
CHECK
•
Removal
1.
Remove the cassette housing control assembly.
2.
Remove the Supply/Take-up main brake ass'y.
3.
Remove tension band from the tension arm ass'y.
4.
Remove the reel disk.
Note:
Take care so that the tension band ass'y and main brake
ass'y are not deformed.
Notes:
1.
When installing the reel disk, take due care so that the
tension band ass'y is not deformed and grease does no
adhere.
2.
Do not damage the Supply main brake ass'y. Be careful
so that grease does not adhere to the brake surface.
•
Reassembly (Take-up reel disk)
1.
Clean the reel disk shaft and apply grease (SC-141) to
it.
2.
Align the phase of the reel disk to that of the reel relay
gear and to install a new take-up reel disk onto the shaft.
3. Check the reel disk height and assemble the take-up
main brake ass'y.
Notes:
1.
Take care so that the Take-up main brake ass'y is not
damaged. Take care so that grease does not adhere the
brake surface.
2.
After reassembly, check the video search rewind back
tension (see
8-12
), and check the brake torque (see
8-
16
).
•
Height checking and adjustment
Notes:
1.
Set the master plane with due care so that it does not
contact the drum.
2.
When putting the master plane, shift the reverse guide
a little in the loading direction. Care must be taken since
excessive shift results in damage.
Figure 8-5.
Note:
•
Check that the reel disk is lower than part A but higher
than part B. If the height is not correct, readjust the reel
disk height by changing the poly-slider washer under the
reel disk.
•
Reassembly (Supply reel disk)
1.
Clean the reel disk shaft and apply grease (SC-141) to
it.
2.
Match the phases of reel disk and reel relay gear, and set
the new reel disk.
3. After checking the reel disk height, wind the tension
band ass'y around the reel disk, and hook to tension arm
ass'y.
4.
Assemble the Supply main brake ass'y.
Take-up reel disk
Supply reel disk
Ten
Tension arm ass'y
Supply main brake
Tension band
ass'y
Take-up main brake ass'y
Supply reel disk
Take-up reel disk
Cassette lock
release shaft
Master plane
Figure 8-4.