Measuring
Measuring point ( )
No. Item instruments & Mode
Adjustment parts ( )
Adjustment procedure
Input signals
Adjustment level ( )
2-29
1 Preparation
2.9.3 Interchangeability adjustment
Fig. 2.9.5
Error on
supply side
Error on
take-up side
(1) Connect a REWRITE board to the CN4004 on
the MAIN board.
Refer to preparation of "3.2 DVC UNITS AD-
JUSTMENTS" for more details.
Note:
Be sure to clean the tape transport parts and
play a cleaning tape before proceeding to
the compatibility adjustment.
2 RF envelope
adjustment
• Oscilloscope,
alignment tape
VFK1842
Color bar portion
Play TP9 ENV OUT
[REWRITE board]
TP5 HID [REWRITE
board]
Supply guide roller
Take-up guide roller
Make the wave-
forms flat. The drop
level should be less
than 3 dB at both
SUP and TU sides.
Flatness and
variation should be
less than 2 dB.
(1) Play alignment tape color bar portion.
(2) Observe the measuring points and adjust the
supply guide roller and take-up guide roller so
that the RF envelope is flat.
(3) Set the mode to EJECT, then set to the PLAY
mode and confirm that the RF envelope is flat.
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