Cam Data Demodulation Adjustment; Cam Tone Adjustment - Sony CCU-TX7 Service Manual

4-7-10. CAM DATA Demodulation Adjustment

Notes :
. This adjustment for the following cameras must be
completed before this adjustment.
[For NTSC] DXC-637 or DXC-D30
[For PAL] DXC-637P or DXC-30P
. Perform the adjustment only when replacing 1LV101 (5.6
MHz TUNE)/AA-90 board.
Equipment : Oscilloscope
(
20 MHz BW Limit : ON
INPUT made
To be extended : AA-90 board
Test point TP6 (GND : E2)/AA-90 board
Adjustment point : 1LV101 (5.6 MHz TUNE)/
AA-90 board
: _100 ± 40 mV dc
Specifications
4-32
)
: DC
GND
A

4-7-11. CAM TONE Adjustment

Notes :
. This adjustment for the following cameras must be
completed before this adjustment.
[For NTSC] DXC-637 or DXC-D30
[For PAL] DXC-637P or DXC-30P
Equipment : Oscilloscope (DC mode)
To be extended : AA-90 board
Test point : TP7 (GND : E2)/AA-90 board
Adjustment point : 1RV101 (TONE TUNE)/
AA-90 board
Adjustment Procedures :
1. 1RV101 (TONE TUNE)/AA-90 board
2. Turn 1RV101 (TONE TUNE)/AA-90 board slowly
clockwise and stop it at the point where the sine wave
signal just appears.
Measure the DC voltage "a"⋅⋅⋅Fig-1
(fig. 1)
3. Turn 1RV101 (TONE TUNE)/AA-90 board slowly
counterclockwise and stop it at the point where the sine
wave signal just appears.
Measure the DC voltage "b"⋅⋅⋅Fig-2
(fig. 2)
4. Adjust the DC level with 1RV101 (TONE TUNE)/AA-
90 board so that "a" is equal to "b"⋅⋅⋅Fig-3
A
B
(fig. 3)
→ "Mechanical center"
Equal (a)
Turn slowly clockwise
Mechanical center
Equal (a)
Turn slowly counterclockwise
Equal (b)
Equal (a)
RV101 (A = B)
Equal (b)
CCU-TX7 (E)/V1