Interchangeability Adjustment - JVC GY-DV5000U Service Manual

Measuring
No. Item instruments &
Input signals

2.9.3 Interchangeability adjustment

1 Preparation
2 RF envelope • Oscilloscope,
adjustment alignment tape
MC-1(NTSC)
MC-2(PAL)
Color bar portion
Error on
supply side
Measuring point ( * )
Adjustment parts ( - )
Mode
Adjustment level ( + )
* TP9 ENV OUT
Play
[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 with both
SUP and TU levels.
+ Flatness variation
should be less than
2 dB.
Error on
take-up side
Fig. 2.9.5
Adjustment procedure
(1) Connect a REWRITE board to the CN801 on
the DBCP board.
Refer to section 3 for more details.
(Fig. 3.4 REWRITE board connection method)
Note:
Be sure to clean the tape transport parts and
play a cleaning tape before proceeding to
the compatibility adjustment.
(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 ensure that the RF envelope is flat.
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