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GENERAL
1 . 1 . 1
Precautions
IMPORTANT:
Disconnect unit from power before removing or solder
1 .
ing components.
2. When removing a fastener (screw, washer, etc . ) , be
careful not to drop it into the mechanism. If a fastener
should be dropped, be sure to retrieve it.
3. The tape transport mechanism has been precisely ad
justed at the factory and ordinarily does not require
readjustment.
4. When removing a part, be very careful not to damage
or displace other parts. (Be especially careful with the
tape guides and rotary video head dru m . I
5. For service procedures that call for operation of the set
when the cassette housing is separated from the main
deck, perform as below.
Set a sheet of insulated material on the right of the
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chassis.
21 Remove the cassette housing from the main-deck and
place it on the insulated sheet, but do not disconnect
the connector from the M ECHACON board.
31 Insert a cassette into the cassette housing. The hous
ing mechanism functions to retract the cassette.
41 Disable the photo transistor sensor (END SENSOR) on
the main-deck by applying an opaque cover.
51 The desired modes can be obtained by using the ope
ration switches.
A lignment tape- Mfr-T , M H - 1 L, M H - F 1
A/CTL head position tool PUJ4735 1 -2
SECTI ON
M E C H A N IS M ADJ USTM ENT
Torque gauge assembly PU,.148075-2
1 - 1 - 1
Fixtures and tools
Table
1
1 . 1 .2
Required test equipment, fixtures and tools
For proper mechanical adjustment, the following test equip
ment, fixtures and tools are strongly recommended. With
out them, a long trial-and-error period would be necessary,
resulting in possible damage. In addition, general-purpose
tools are required .
1 .
Test equipment required:
Color television or monitor
Oscilloscope: Wide-band, dual trace, triggered, delayed
sweep
Recording tape
Alignment tapes
Back tension cassette gauge PUJ48076-2
1 -1
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