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32
27DV-S100
27DV-CS10
CHECKING THE VIDEO SEARCH REWIND
BACK TENSION
• Remove the cassette housing control assembly.
• After short-circuiting R7057 and JUMPER:420
provided on the main PWB, plug in the power cord,
then turn on the power.
• Checking
1. After pressing the play button, press the rewind button,
and set the video search rewind mode.
2. Place the torque gauge on the take-up reel disk, and
turn it counterclockwise very slowly (one rotation every
2 to 3 seconds) and check that the torque is within the
set value 3.4 ± 1.5mN
⋅
m (35 ± 15gf
⋅
cm).
• Problems caused by maladjustments
1. Tapes may get scratched whether much or slightly
maladjusted
Torque gauge
CCW
Take-up reel disk
Figure 1-12.
Note:
Set the torque gauge securely on the take-up reel disk. If
it is not secure, the measurement will be incorrect.
CHECKING THE PINCH ROLLER
PRESSURE
• Remove the cassette housing control assembly.
• After short-circuiting R7057 and JUMPER:420
provided on the main PWB, plug in the power cord,
then turn on the power.
• Checking
Press the play button to set the playback mode.
• Problems caused by maladjustments
1. Much maladjusted
: The service life of the capstan
and pinch roller may be shorter.
2. Slightly maladjusted : Images onscreen may get
distorted.
1. Detach the pinch roller from the capstan shaft.
Do not separate excessively. Or the pinch lever and
pinch double action lever may disengage.
2. Engage the tension gauge adapter with the pinch roller
shaft, and pull in the arrow direction.
3. Gradually return the pinch roller, and measure the
pulling force when the pinch roller contacts the capstan
shaft.
4. Make sure that the measured value is within setting 9.0
N to 11.8 N (900 to 1,200gf).
CHECKING AND ADJUSTMENT OF
TENSION POLE POSITION
•
Remove the cassette housing control assembly.
•
After short-circuiting R7057 and JUMPER:420
provided on the main PWB, plug in the power cord,
then turn off the power.
•
Setting
1. Turn off the power switch.
2. Open the cassette tape (T-120), and fix with tape.
3. Set the cassette tape into the unit.
4. Put the weight (500g) on the cassette tape.
5. Turn on the power switch.
6. Make the adjustment with the beginning of a T-120
tape.
Pinch roller
Capstan shaft
Tension gauge
900 - 1,200gf
Tension gauge adapter
Figure 1-13.
500g
(T-120)
Weight to prevent
float (500g)
Figure 1-14.
•
Checking
1. Set a cassette tape, push the REC button to place the
unit in the SP record mode. Now check the tension pole
position.
Summary of Contents for 27DV-CS10
Page 72: ...73 27DV S100 27DV CS10 72 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H CHASSIS LAYOUT ...
Page 103: ...111 27DV S100 27DV CS10 6 5 4 3 2 1 A B C D E F G H SCHEMATIC DIAGRAM CRT Unit ...
Page 106: ...116 27DV S100 27DV CS10 6 5 4 3 2 1 A B C D E F G H SCHEMATIC DIAGRAM TERMINAL SUB Unit ...
Page 107: ...117 27DV S100 27DV CS10 6 5 4 3 2 1 A B C D E F G H SCHEMATIC DIAGRAM FRONT AV Unit ...
Page 122: ...144 27DV S100 27DV CS10 6 5 4 3 2 1 A B C D E F G H MAIN Unit Wiring Side ...
Page 123: ...145 27DV S100 27DV CS10 6 5 4 3 2 1 A B C D E F G H MAIN Unit Chip Parts Side ...
Page 124: ...146 27DV S100 27DV CS10 6 5 4 3 2 1 A B C D E F G H TERMINAL Unit Wiring Side ...
Page 125: ...147 27DV S100 27DV CS10 6 5 4 3 2 1 A B C D E F G H TERMINAL Unit Chip Parts Side ...
Page 126: ...148 27DV S100 27DV CS10 6 5 4 3 2 1 A B C D E F G H TV POWER Unit Wiring Side ...
Page 127: ...149 27DV S100 27DV CS10 6 5 4 3 2 1 A B C D E F G H DEFLECTION Unit Wiring Side ...
Page 128: ...150 27DV S100 27DV CS10 6 5 4 3 2 1 A B C D E F G H DVD VCR POWER Unit Wiring Side ...
Page 130: ...152 27DV S100 27DV CS10 6 5 4 3 2 1 A B C D E F G H DVD MAIN Unit A Side ...
Page 131: ...153 27DV S100 27DV CS10 6 5 4 3 2 1 A B C D E F G H DVD MAIN Unit B Side ...