Previous Preparation For Deck Adjustment; Torque Measuring - Philips DVP3350V/01 Service Manual

DECK MECHANISM ADJUSTMENT

2. Previous Preparation for Deck Adjustment

(Preparation to load the VCR (VCP) with cassette tape not inserted)
1) Unplug the power cord.
2) Separate the top cover and the plate assembly top.
3) Plug in power cord.
4) Turn the VCR (VCP) on and load the cassette while
pushing the lever stopper of the holder assembly CST
backward. In this case, clog both holes on the housing rail
part of chassis to prevent detection of the end sensor.

3. Torque Measuring

Purpose of Measuring: To measure and check the reel torque on the take-up part and the
Fixtures and tools used
• Torque Gauge
(600 g.cm ATG)
• Torque Gauge Adaptor
• Cassette Torque Meter
SRK-VHT-303
Item
Fast forward Torque Fast Forward
Rewind Torque
Play Take-Up Torque Play
Review Torque
NOTE
Adhere the torque gauge adaptor to the torque gauge for measuring the value.
• Cassette Torque Meter (SRK-VHT-303)
Fig. C-3-1
supply part that performs basic operation of the VCR (VCP) for
smoothly forwarding the tape.
Measure and check followings when the tape is not smoothly
wound or the tape velocity is abnormally proceeded:
VCR (VCP) status
• Play (FF) or Review
(REW) Mode
Mode
Torque Gauge
Rewind Torque Gauge
VHT-303
Review VHT-303
Torque Gauge
Torque Gauge
Adaptor
Reel Table
If doing so, proceeding to the stop mode is done. In this
status, input signals of all modes can be received.
However, operation of the Rewind and the Review is
impossible since the take-up reel remains at stop status
and so cannot detect the reel pulse (however, possible for
several seconds).
• Try to operate the VCR (VCP) per mode with the
tape not inserted (See '2. Prior Preparation for
Deck Adjustment).
• Measure after adhering and fixing the torque
gauge adaptor to the torque gauge (Fig. C-3-1)
• Read scale of the supply or take-up part of the
cassette torque meter (Fig. C-3-2).
Instruments Reel Measured
Take-Up Reel
Supply Reel
Take-Up Reel
Supply Reel
• Torque Gauge (600g.cm ATG)
4-15
Measuring method
Measuring Value
More than 400g°cm
More than 400g°cm
40~100g°cm
120~210g°cm
Fig. C-3-2