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5-35

Improve the capstan servo characteristic. If it is not correct. jitters
will increase.

Mode

Camera recording (SP mode)

Subject

Arbitrary

Measurement Point

Pin !™ of CN910 (CAP FG)

Measuring Instrument

Oscilloscope

Adjustment Page

F

Adjustment Address

61

Specified value

Duty = 50 ± 1 %

Adjusting method:
1)

Set to the Camera recording mode (SP mode).

2)

Select page: 0, address: 01, and set data: 01.

3)

Select page: 6, address: 01, set data: 81, and press the PAUSE
button of the adjustment remote commander. (to start up
automatic CAP FG offset adjustment.)

4)

Select page: 6, address: 02, and check that the data is “01”.

5)

Check that Duty of CAP FG signal satisfies the specified value.
If not, select page: 6, address: 01, set data: 00, and press the
PAUSE button, and then, repeat steps 1) to 5).

6)

Select page: 6, address: 01, set data: 00, and press the PAUSE
button of the adjustment remote commander.

7)

Select page: 0, address: 01, and set data: 00.

If deviated in this case causes switching noise or jitter on the played
back screen.

Mode

Playback

Signal

Alignment tape:

For tracking adjustment
(WR5-1CP)

Measurement Point

CH1: Pin !¡ of CN910 (RF SWP)
CH2: Pin 6 of CN910 (PB RF)

Measuring Instrument

Oscilloscope

Adjustment Page

F

Adjustment Address

3E, 3F

Specified Value

t1 = 0 ± 10 

µ

sec

Adjusting Method:
1)

Select page: 0, address: 01, and set data: 01.

2)

Select page: F, address: 2C, set data: 20, and press the PAUSE
button of the adjustment remote commander.

3)

Select page: F, address: 3E, change the data and minimize “t1”,
and then press the PAUSE button of the adjustment remote
commander. (Coarse adjustment)

4)

Select page: F, address: 3F, change the data and adjust so that
the switching position (t1) becomes the specified value. (Fine
adjustment)

5)

Press the PAUSE button of the adjustment remote commander.

6)

Select page: F, address: 2C, set data: 00, and press the PAUSE
button of the adjustment remote commander.

7)

Select page: 0, address: 01, and set data: 00.

A

B

Duty = A/B 

×

 100 [%] 

Center of movement 

CH1

CH2

Enlargement

t1=0 

±

 10 

µ

sec

CH1

CH2

Fig. 5-3-5.

Fig. 5-3-6.

5-36

Video system adjustments must be performed in the following order.

1.

28MHz origin oscillation adjustment

2.

AFC f

0

 adjustment

3.

Filter f

0

 adjustment

4.

Y OUT level adjustment

5.

C OUT level adjustment

6.

RP filter f

0

 adjustment

7.

REC Y current adjustment

8.

REC L level adjustment

9.

REC C current adjustment

Set the frequency of the clock for synchronization.
If deviated, the synchronization will be disrupted and the color will
become inconsistent.

Mode

VTR stop

Signal

No signal

Measurement Point

Pin #™ of IC301 or pin !™ of IC501

Measuring Instrument

Frequency counter

Adjustment Page

F

Adjustment Address

40

Specified Value

Pin #™ of IC301 :

f=4433594 ± 17Hz

Pin !™ of IC501 :

f=14187500 ± 55Hz

Adjusting method:
1)

Select page: 0, address: 01, and set data: 01.

2)

Select page: 2, address: 01, set data: 41, and press the PAUSE
button of the adjustment remote commander.

3)

Select page: 6, address: 61, and set data: 30.

4)

Select page: F, address: 40, change the data and set the clock
frequency (f) to the specified value.

5)

Press the PAUSE button of the adjustment remote commander.

6)

Select page: 6, address: 61, and set data: 10.

7)

Select page: 2, address: 01, set data: 00, and press the PAUSE
button of the adjustment remote commander.

8)

Select page: 0, address: 01, and set data: 00.

Adjust the pull-in range of the A/D converted clock generator during
playback.

Mode

VTR stop

Signal

No signal

Measurement Point

Pin 4 of CN910 (AFC f0)

Measuring Instrument

Digital voltmeter

Adjustment Page

F

Adjustment Address

6A

Specified Value

A=2.00 ± 0.05Vdc

Adjusting method:
1)

Select page: 0, address: 01, and set data: 01.

2)

Select page: 2, address: 01, set data: 4D, and press the PAUSE
button of the adjustment remote commander.

3)

Select page: F, address: 6A, change the data and  set the DC
voltage (A) to the specified value.

4)

Press the PAUSE button of the adjustment remote commander.

5)

Select page: 2, address: 01, set data: 00, and press the PAUSE
button of the adjustment remote commander.

6)

Select page: 0, address: 01, and set data: 00.

IC501

1

12

36

25

24

37

13

48

IC301

1

16

48

33

49

32

64

17

5-37

Adjust the f

0

 frequency of the IC151 built-in filter.

Mode

VTR stop

Signal

No signal

Measurement Point

Pin 3 of CN910 (IR VIDEO)

Measuring Instrument

Oscilloscope

Adjustment Page

F

Adjustment Address

6D

Specified Value

Minimum residual chroma signal
components (A= Bellow 12mV)

LASER LINK ........................................ ON (Red LED is lit)

Adjusting method:
1)

Select page: 0, address: 01, and set data: 01.

2)

Select page: 2, address: 01, set data: 4F, and press the PAUSE
button of the adjustment remote commander.

3)

Select page: F, address: 6D, change the data and minimize the
residual chroma signal components (A).

4)

Press the PAUSE button of the adjustment remote commander.

5)

Select page: 2, address: 01, set data: 00, and press the PAUSE
button of the adjustment remote commander.

6)

Select page: 0, address: 01, and set data: 00.

Set the Y signal output level. (Adjust the D/A converter out put
level of IC151.)

Mode

VTR stop

Signal

No signal

Measurement Point

Y signal terminal of S VIDEO
terminal (75

Ω

 terminated )

Measuring Instrument

Oscilloscope

Adjustment Page

F

Adjustment Address

69

Specified Value

A=300 ± 5mV

Insert the plug into the S video terminal.

Adjusting method:
1)

Select page: 0, address: 01, and set data: 01.

2)

Select page: 2, address: 01, set data: 41, and press the PAUSE
button of the adjustment remote commander.

3)

Select page: 6, address: 61, and set data: 30.

4)

Select page: F, address: 69, change the data and set the SYNC
level (A) to the specified value.

5)

Press the PAUSE button of the adjustment remote commander.

6)

Select page: 6, address: 61, and set data: 10.

7)

Select page: 2, address: 01, set data: 00, and press the PAUSE
button of the adjustment remote commander.

8)

Select page: 0, address: 01, and set data: 00.

H

A

Fig. 5-3-7.

Fig. 5-3-8.

H

A

5-38

Set the chroma signal output level. (Adjust the D/A converter out
put level of IC151.)

Mode

VTR stop

Signal

No signal

Measurement Point

Chroma signal terminal of S VIDEO
terminal (75

Ω

 terminated )

Measuring Instrument

Oscilloscope

Adjustment Page

F

Adjustment Address

6B

Specified Value

A=300 ± 5mV

 Insert the plug into the S video terminal.

Adjusting method:
1)

Select page: 0, address: 01, and set data: 01.

2)

Select page: 2, address: 01, set data: 41, and press the PAUSE
button of the adjustment remote commander.

3)

Select page: 6, address: 61, and set data: 30.

4)

Select page: F, address: 6B, change the data and set the burst
level (A) to the specified value.

5)

Press the PAUSE button of the adjustment remote commander.

6)

Select page: 6, address: 61, and set data: 10.

7)

Select page: 2, address: 01, set data: 00, and press the PAUSE
button of the adjustment remote commander.

8)

Select page: 0, address: 01, and set data: 00.

Adjust the LPF of the playback RF amplifier (IC001).

Mode

VTR stop

Signal

No signal

Measurement Point

Pin 9 of CN910 (RF AGC OUT)

Measuring Instrument

Oscilloscope

Adjustment Page

F

Adjustment Address

6E

Specified Value

A= Minimum

Connection:
1)

Input a 14.2MHz, 400mVp-p CW signal to Pin 7 of CN910
(RF AGC IN).

Transistor : General NPN transistor (2SC403, etc)
47 

Ω

 resistor :

1-249-401-11

1 k

Ω

 resistor :

1-249-417-11

15 k

Ω

 resistor :

1-249-431-11

0.01 

µ

F capacitor : 1-101-004-00

Fig. 5-3-10.

Adjusting method:
1)

Select page: 0, address: 01, and set data: 01.

2)

Select page: 2, address: 01, set data: 35, and press the PAUSE
button of the adjustment remote commander.

3)

Select page: F, address: 6E, change the data and minimize the
14.2 MHz signal level (A).

4)

Press the PAUSE button of the adjustment remote commander.

5)

Select page: 2, address: 01, set data: 00, and press the PAUSE
button of the adjustment remote commander.

6)

Select page: 0, address: 01, and set data: 00.

H

A

Signal 
generator

14.2 MHz 400 mVp-p

0.01 

µ

F

47 

Ω

15 k

Ω

1 k

Ω

RFU DC OUT jack 
on PJ-92 board 
(4.75 V)

Pin 

7

 of CN910

(RF AGC IN)

Pin 

8

 of CN910

(REG GND)

0.01 

µ

F  

A

14.2MHz

Fig. 5-3-9.

Fig. 5-3-11.