Compatibility Adjustment - JVC GY-HD100E Service Manual

Measuring
No. Item instruments &
Input signals

2.12.3 Compatibility adjustment

1 Preparation
Fig. 2-12-5 How to mount a connector board
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 ( + )
Connector board
* TP9 ENV OUT
Play
[connector board]
* TP5 HID [connector
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. 2-12-6
Adjustment procedure
(1) Mount a connector board to the CN23 on the
A/L/S board by inserting it in the slot that is
provided to accommodate it. This may be
achieved without removing the R. side cover.
(See Fig. 2-12-6.)
NOTE
⋅ Make sure the component surface of the
connector board is upside.
NOTE
⋅ Be sure to clean the tape transport parts
and play a cleaning tape before proceed-
ing 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 waveform is flat.
(3) Set the mode to EJECT, then set to the PLAY
mode and ensure that the RF waveform is flat.
2-29