Preparation For Adjustment; Checking Torque - JVC HR-V200Ez Service Manual

DECK MECHANISM ADJUSTMENT
2. Preparation for Adjustment (To set the
Deck Mechanism of the loading state
without inserting a cassette tape).
1) Unplug the power cord from the AC outlet.
2) Disassemble the Top Cover and Plate Assembly Top.
3) Plug the power cord into the AC outlet.
4) Turn the power S/W on and push the Lever Stopper of
the Holder Assembly CST to the back for loading the

3. Checking Torque

Purpose: To insure smooth transport of the tape during each mode of operation.
If the tape transport is abnormal, then check the torque as indicated by the chart below.
Test Equipment/ Fixture
• Torque Gauge(600g/cm ATG)
• Torque Gauge Adaptor
• Cassette Torque Meter
Item
Fast Forward
Fast Forward Torque
Rewind Torque Rewind
Play
Play Take-Up Torque
Review Torque Review
NOTE:
The values are measured by using a Torque Gauge and
Torque Gauge Adaptor with the Torque Gauge affixed.
• Torque Gauge (600g.cm ATG)
Fig. C-3-1
Test Conditions
(Mechanism Condition)
• Play (FF) or Review (REW) Mode
Mode
Test Equipment
Cassette Torque Gauge
Cassette Torque Gauge
Cassette Torque Meter
Cassette Torque Meter
Torque Gauge
Torque Gauge
Adaptor
Reel Table
cassette without tape.
Cover the holes of the End Sensors at the both sides of
the Chassis to prevent a light leak.
Then the Deck Mechanism drives to the Stop Mode.
In this case, the Deck Mechanism can accept inputs of
each mode, however the Rewind and Review operation
can not be performed for more than a few seconds
because the Take-up Reel Table is in the Stop State
and can not be detected the Reel Pulses.
Checking Method
• Perform each Deck Mechanism mode without
inserting a cassette tape(Refer to above No.2

Preparation for Adjustment).

• Read the measurement of the Take-up or Supply
Reels on the Cassette Torque Meter(Fig. C-3-2).
• Attach the Torque Gauge Adaptor to the Torque
Gauge and then read the value of it(Fig. C-3-1).
Measurement Reel
Take-Up Reel
Supply Reel
Take-Up Reel
Supply Reel
NOTE:
The torque reading to measure occurs when the tape
abruptly changes direction from Fast Forward to Rewind
Mode, when quick braking is applied to both Reels.
• Cassette Torque Meter
Fig. C-3-2
Measurement Values
More than 400g/cm
More than 400g/cm
40~100g/cm
120~210g/cm
4-14