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3.1 Before starting repair and adjustment
3.1.1 Precautions
(1) Unplug the power cord plug of the VCR before using your
soldering iron.
(2) Take care not to cause any damage to the conductor wires
when plugging and unplugging the connectors.
(3) Do not randomly handle the parts without identifying where
the trouble is.
(4) Exercise enough care not to damage the lugs, etc. during
the repair work.
(5) When reattaching the front panel assembly, make sure that
the door opener of the cassette holder assembly is lowered
in position prior to the reinstallation. (See SECTION 2 SPE-
CIFIC SERVICE INSTRUCTIONS.)
(6) When using the Jig RCU, it is required to set the VCR to the
Jig RCU mode (the mode in which codes from the Jig RCU
can be received). (See SECTION 2 SPECIFIC SERVICE
INSTRUCTIONS.)
3.1.2 Checking for proper mechanical operations
Enter the mechanism service mode when you want to operate
the mechanism when no cassette is loaded. (See SECTION 2
SPECIFIC SERVICE INSTRUCTIONS.)
3.1.3 Jigs and tools required for adjustment
Roller driver
A/C head positioning tool
PTU94002
PTU94010
Back tension cassette gauge
Jig RCU
PUJ48076-2
PTU94023B
Alignment tape
Alignment tape
(SP, stairstep, NTSC)
(EP, stairstep, NTSC)
MHP
3.1.4 Manually removing the cassette tape
3.1.4.1
In case of electrical failures
If you cannot remove the cassette tape which is loaded because
of any electrical failure, manually remove it by taking the follow-
ing steps.
(1) Unplug the power cord plug from the power outlet.
(2) Refer to the disassembly procedure and perform the disas-
sembly of the major parts before removing the drum as-
sembly.
(3) Unload the pole base assembly by manually turning the
loading motor of the mechanism assembly toward the front.
In doing so, hold the tape by the hand to keep the slack
away from any grease. (See Fig.3-1-4a.)
MECHANISM ADJUSTMENT
Torque gauge
PUJ48075-2
MHP- L
Fig.3-1-3
SECTION 3
(4) Bring the pole base assembly to a pause when it reaches
the position where it is hidden behind the cassette tape.
(5) Move the top guide toward the drum while holding down
the lug (A) of the bracket retaining the top guide. Likewise
hold part (B) down and remove the top guide.
Section (C) of the top guide is then brought under the cas-
sette lid. Then remove the top guide by pressing the whole
cassette tape down. (See Fig.3-1-4b.)
(6) Remove the cassette tape by holding both the slackened
tape and the cassette lid.
(7) Take up the slack of the tape into the cassette. This com-
pletes removal of the cassette tape.
Note:
• For the disassembly procedure of the major parts and
details of the precautions to be taken, see "SECTION 2
SPECIFIC SERVICE INSTRUCTIONS".
Pole base assembly
(B)
Loading motor
Fig.3-1-4a
(C)
(A)
Press
Fig.3-1-4b
(No.82933)1-15
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