6-107
HVR-A1J/A1U/A1N/A1E/A1P/A1C
4-3.
Tape Path Adjustment
3-1.
Adjustment Preparation
1)
Clean the tape running surface (tape guides, drum, capstan,
pinch roller) referring to section 2-2.
2)
Connect the adjustment remote commander (Ref. No. J-1, J-2)
to the LANC terminal of the machine. Set the HOLD switch to
ON. (Set the slide switch to SERVICE)
3) Connect an oscilloscope to NN-001 board CN7005 via the
CPC-7 jig (J-6082-382-A).
Channel 1: NN-001 board, CN7005 Pin
9
(Note)
External trigger: NN-001 board, CN7005 Pin
qa
Note:
Connect a 75
Ω
resistor between pins
9
of CN7005
and
8
(GND).
75
Ω
resistor (Parts code: 1-247-804-11)
4)
Play back the tracking standard (XH 2-1) (Ref. No. J-13).
5)
Select page: 0, address: 10 and set data: 00.
6)
Select page: 3, address: 26 and set data: 31, and press the PAUSE
(Write) button.
7)
Select page: 3, address: 33 and set data: 08.
8)
Confirm that the RF waveform on the scope is flat at both of
the entrance side and the exit side. (Refer to Fig. 6-2-7A.)
If the RF waveform is not flat either at the entrance side or the
exit side (refer to Fig. 6-2-7 B and C), perform the adjustment
of section “3-2. TG2/TG4 Guide Coarse Adjustment” and later.
9)
Prepare an exclusive DVM-80 tape (commercial item).
(Remove the lid of the cassette.)
Fig. 6-2-6
Fig. 6-2-7
Fig. 6-2-8
10) When the required conditions of step 8) are satisfied, perform
[Required Work upon Completion of Adjustment] as described
below upon completion of adjustment/check.
[Required Work upon Completion of Adjustment]
1)
Connect the adjustment remote commander (Ref. No. J-1, J-2) to
the LANC terminal of the machine. Set the HOLD switch to ON.
(Set the slide switch to SERVICE)
2)
Select page: 0, address: 10 and set data: 00.
3)
Select page: 3, address: 26 and set data: 00, and press the PAUSE
(Write) button.
4)
Select page: 3, address: 33 and set data: 00.
CH1
CH2
(
Trigger)
Envelope must be flat
3.3 msec
A
Normal
B
Entrance side is defective
C
Exit side is defective
Entrance side
Exit side
FWD
Tape
Tape must run while maintaining contact with the upper flange.
There must not exist a large tape curl.
Drum
S reel
T reel
TG6 guide
TG5 guide
TG4 guide
TG3 guide
TG2 guide
TG1
guide
Pinch roller
Capstan
Capstan
TG6
TG1
TG5 TG4
TG3 TG2
There must not exist
a large tape curl.
There must not exist
a large tape curl.
Assemble without this part.
Cassette lid
Torsion spring
Exclusive DVM-80 tape
(commercial item)
