Measuring
Measuring point (
*
)
No.
Item
instruments &
Mode
Adjustment parts (
-
)
Adjustment procedure
Input signals
Adjustment level (
+
)
2-29
2
RF envelope
adjustment
1
Preparation
• Oscilloscope,
alignment tape
MC-1(NTSC)
MC-2(PAL)
Color bar portion
Play
(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.)
*
TP9 ENV OUT
[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.
2.12.3 Compatibility adjustment
Fig. 2-12-5 How to mount a connector board
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.
Fig. 2-12-6
Error on
supply side
Error on
take-up side
NOTE
⋅
Make sure the component surface of the
connector board is upside.
Connector board