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5-37

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.

5-38

A

0.18 

µ

sec

Fig. 5-3-12.

Adjust the Y FM signal recording current.

Mode

VTR recording (SP mode)

Signal

No signal

Measurement Point

Pin 0 of CN910 (REC RF)

Measuring Instrument

Oscilloscope
(20 MHz BW LIMIT: OFF)

Adjustment Page

F

Adjustment Address

73  to 7A

Specified Value

A=185 ± 5mV

Preparations only for the model without REC switch:
1)

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

2)

Select page: D, address: 14, after memorizing the data, set the
bit value of bit1 to “1”. (Refer to “4-3, 3. Bit value
discrimination” of “5-4. Service Mode”).

3)

Select page: D, address: 15, after memorizing the data, set the
bit value of bit7 to “0”.

4)

Insert a tape, and set to recording mode. (Use the wireless
remote commander of 8mm VCR.)

Adjusting method:
1)

Insert a tape, and set to recording mode.

2)

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

3)

Select page: F, address: 7C, after note down the data , set data:
00, and press the PAUSE button of the adjustment remote
commander.

4)

Select page: F, address: 85, after note down the data , set data:
00, and press the PAUSE button of the adjustment remote
commander.

5)

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

6)

Select page: F, address: 74 , change the data and set the Y signal
level (A) to the specified value.

7)

Press the PAUSE button of the adjustment remote commander.

8)

Select page: F, address: 74 , and read the data (D

74

).

9)

Calculate the adjustment data from the following equations,
and input each adjustment address.

Address: 73

D

73

  = D

74

Address: 75

D

75

  = D

74

Address: 76

D

76

  = D

74

After setting each data, be sure to press the PAUSE button of
the adjustment remote commander.

10) Write the following data in page: F, address: 77  to  7A .

After setting each data, be sure to press the PAUSE button of
the adjustment remote commander.

11) Select page: F, address: 7C, set the data noted down at step 3),

and press the PAUSE button of the adjustment remote
commander.

12) Select page: F, address: 85, set the data noted down at step 4),

and press the PAUSE button of the adjustment remote
commander.

13) Select page: 2, address: 01, set data: 00, and press the PAUSE

button of the adjustment remote commander.

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

77

78

79

7A

63

6B

63

6B

Processing after completed adjustment only for the model
without REC switch:
1)

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

2)

Select page: D, address: 14, and set the data memorized at step
2) of “Preparations only for the model without REC switch”.

3)

Press the PAUSE button of the adjustment remote commander.

4)

Select page: D, address: 15, and set the data memorized at step
3) of “Preparations only for the model without REC switch”.

5)

Press the PAUSE button.

6)

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

5-39

A

0.67

µ

sec

Center of the luminace line width

Center of the luminace line width

Fig. 5-3-13.

IC202

1

44

132

89

176

133

45

88

IC001

12

1

25 36

13

48

24

37

C085

Set the recording levels of the REC AFM signal and REC ATF signal.
If the level is too low, the audio S/N will deteriorated, tracking will
not be stable, or SP/LP will not be discriminated properly. If too
high, color beets will be produced on the self-recording / playback
image.

Mode

VTR recording (SP mode)

Signal

No signal

Measurement Point

Pin 0 of CN910 (REC RF)

Measuring Instrument

Oscilloscope
(20 MHz BW LIMIT: OFF)

Adjustment Page

F

Adjustment Address

7B to 84

Specified Value

A=11.0 ± 0.7mV

Do not insert any plug into the AUDIO (R) terminal.

Connection:
1)

Remove C085 (0.01 

µ

F, Pin !§ of IC202).

After completing “REC L Level Adjustment” and “REC C
Current Adjustment”, replace C085 with new parts (1-182-970-
11 CERAMIC CHIP 0.01 

µ

F 10% 25V).

Preparations only for the model without REC switch:
1)

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

2)

Select page: D, address: 14, after memorizing the data, set the
bit value of bit1 to “1”. (Refer to “4-3, 3. Bit value
discrimination” of “5-4. Service Mode”).

3)

Select page: D, address: 15, after memorizing the data, set the
bit value of bit7 to “0”.

4)

Insert a tape, and set to recording mode. (Use the wireless
remote commander of 8mm VCR.)

Adjusting method:
1)

Insert Hi8 ME tape, and set to recording mode.

2)

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

3)

Select page: F, address: 7B, set data: 00, and press the PAUSE
button of the adjustment remote commander.

4)

Select page: F, address: 85, set data: 00, and press the PAUSE
button of the adjustment remote commander.

5)

Select page: F, address: 7C, change the data and set the REC
AFM signal level (A) to the specified value.

6)

Press the PAUSE button of the adjustment remote commander.

7)

Select page: F, address: 7C, read the data (D

7C

).

8)

Convert D

7C

 to decimal notation, and obtain D

7C

'. (Refer to Table

5-4-1. “Hexadecimal-decimal conversion table” of “5-4. Service
Mode”.)

9)

Calculate the adjustment data (decimal) from the following
equations (decimal calculation), convert it to a hexadecimal
number, and input each adjustment address.

Address: 7B

D

7B

' = D

7C

'

Address: 7D

D

7D

' = D

7C

'

Address: 7E

D

7E

' = D

7C

'

Address: 7F

D

7F

' = D

7C

' –68

Address: 80

D

80

' = D

7C

' –68

Address: 81

D

81

' = D

7C

' –68

Address: 82

D

82

' = D

7C

' –68

After setting each data, be sure to press the PAUSE button of
the adjustment remote commander.

10) Write the following data (hexadecimal) in page: F, address: 83

to 84.

After setting each data, be sure to press the PAUSE button of
the adjustment remote commander.

11) Select page: 0, address: 01, and set data: 00.
12) Perform “REC C Current Adjustment”.

83

84

96

96

Processing after completed adjustment only for the model
without REC switch:
1)

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

2)

Select page: D, address: 14, and set the data memorized at step
2) of “Preparations only for the model without REC switch”.

3)

Press the PAUSE button of the adjustment remote commander.

4)

Select page: D, address: 15, and set the data memorized at step
3) of “Preparations only for the model without REC switch”.

5)

Press the PAUSE button.

6)

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

5-40

A 

1.35 

µ

sec

Center of the luminance line width 

Fig. 5-3-14.

Set the recording current levels of the REC Chroma signal. If it is
too low, chroma signal noise in played back picture will increased.
If too high, Y signal noises will increase and white modulation noises
will be produced.

Mode

VTR recording (SP mode)

Signal

No signal

Measurement Point

Pin 0 of CN910 (REC RF)

Measuring Instrument

Oscilloscope

Adjustment Page

F

Adjustment Address

85

Specified Value

A=35.7 ± 1.3mV

Connection:
1)

Remove C085 (0.01 

µ

F, Pin !§ of IC202).

After completing “REC L Level Adjustment” and “REC C
Current Adjustment”, replace C085 with new parts (1-162-970-
11 CERAMIC CHIP 0.01 

µ

F 10% 25V).

2)

Connect Pin $∞ of IC001 and GND with a 0.01F capacitor.
0.01 

µ

F capacitor: 1-101-004-00

Preparations only for the model without REC switch:
1)

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

2)

Select page: D, address: 14, after memorizing the data, set the
bit value of bit1 to “1”. (Refer to “4-3, 3. Bit value
discrimination” of “5-4. Service Mode”).

3)

Select page: D, address: 15, after memorizing the data, set the
bit value of bit7 to “0”.

4)

Insert a tape, and set to recording mode. (Use the wireless
remote commander of 8mm VCR.)

Adjusting method:
1)

Insert a tape, and set to recording mode.

2)

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

3)

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

4)

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

5)

Select page: F, address: DE, after note down the data, set data:
00, and press the PAUSE button of the adjustment remote
commander.

6)

Select page: F, address: 85, change the data and set the REC
chroma signal level (A) to the specified value.

7)

Press the PAUSE button of the adjustment remote commander.

8)

Select page: F, address: DE, set the data noted down at step 5),
and press the PAUSE button of the adjustment remote
commander.

9)

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

10) Select page: 2, address: 01, set data: 00, and press the PAUSE

button of the adjustment remote commander.

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

Processing after completed adjustment only for the model
without REC switch:
1)

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

2)

Select page: D, address: 14, and set the data memorized at step
2) of “Preparations only for the model without REC switch”.

3)

Press the PAUSE button of the adjustment remote commander.

4)

Select page: D, address: 15, and set the data memorized at step
3) of “Preparations only for the model without REC switch”.

5)

Press the PAUSE button.

6)

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