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5-19

qj

w;

Fig. 5-3-4.

Mode

Playback

Signal

Recorded signal at “Preparations
before adjustments”

Measurement Point

Pin w; of CN933 (RF MON) (Note 1)
Ext. trigger: Pin qj of CN933 (SWP)

Measuring Instrument

Oscilloscope

Adjustment Page

C

Adjustment Address

1E

Specified Value

The data of page: 3, address: 03 is
“00”

Connect a 75

Ω resistor between Pin w; and Pin ql (GND) of

CN933.
75

Ω resistor (Parts code: 1-247-804-11)

1

Playback the recorded signal at
“Preparations before
adjustments”

2

0

01

01

Set the data.

3

3

33

08

Set the data.

4

Confirm that the playback RF
signal is stable. (Fig. 5-3-4.)

5

3

01

23

Set the data, and press PAUSE
button.

6

3

02

Check that the data is “00”.

7

3

03

Check that the data is “00”.
(Note2)

8

Perform “APC & AEQ
Adjustment”.

If the data of page: 3, address: 03 is other than “00”, adjustment
has errors. (Take an appropriate remedial measures according to
the errors referring to the following table.)

Data

Contents of defect

20

Perform re-adjustment. (Note 3)

30

The machine is defective

40

Perform re-adjustment. (Note 3)

50

The machine is defective

If this data is displayed twice successively, the machine is defective.

Mode

Playback

Signal

Recorded signal at “Preparations
before adjustments”

Measurement Point

Pin w; of CN933 (RF MON) (Note 1)
Ext. trigger: Pin qj of CN933 (SWP)

Measuring Instrument

Oscilloscope

Adjustment Page

C

Adjustment Address

18, 19, 1B, 1C, 21, 2C

Specified Value

The data of page: 3, address: 03 is
“00”

Connect a 75

Ω resistor between Pin w; and Pin ql (GND) of

CN933.
75

Ω resistor (Parts code: 1-247-804-11)

The  “AGC Center Level Adjustment” must have already been
completed before starting this adjustment.

1

Playback the recorded signal at
“Preparations before
adjustments”

2

0

01

01

Set the data.

3

3

33

08

Set the data.

4

Confirm that the playback RF
signal is stable. (Fig. 5-3-5.)

5

3

01

07

Set the data, and press PAUSE
button.

6

3

02

Check that the data changes
from “07” to “00” in about 20
seconds after pressing PAUSE
button.

7

3

03

Check that the data is “00”.
(Note3)

8

Perform “Processing after
Completing Adjustments”.

If the data is other than “00”, adjustment has errors. Take an
appropriate remedial measures according to the errors referring to
the following table.

Data

Contents of defect

20

Perform re-adjustment. (Note 4)

30

The machine is defective

50

Perform re-adjustment. (Note 4)

60

The machine is defective

80

The machine is defective

If this data is displayed twice successively, the machine is defective.

Fig. 5-3-5.

qj

w;

5-20

Mode

VTR stop

Signal

Arbitrary

Measurement Point

Display data of page: 3, address: 02, 03

Measuring Instrument

Adjustment remote commander

Adjustment Page

C

Adjustment Address

1F, 20, 22, 29

Specified Value

Data of page: 3, address: 02 is “00”.
Data of page: 3, address: 03 is “00”.

1

0

01

01

Set the data.

2

3

01

30

Set the data, and press PAUSE
button.

3

3

02

Check that the data changes to
“00” with in 5 sec. (Note1)

4

3

03

Check that the data is “00”.
(Note2)

5

0

01

00

Set the data.

If it isn’t satisfied, there are errors.

If the data of page: 3, address: 03 is other than “00”, there are
errors. For the error contents, see the following table. (For the bit
values, refer to “5-4. SERVICE MODE”,  “4-3. 3. Bit value
discrimination”.)

Bit value of page: 3,

Error contents

address: 03 data

bit 2 = 1 or bit 3 = 1

PLL f

0

 fine adjustment is defective

bit 4 = 1 or bit 5 = 1

PLL f

0

 adjustment is defective

bit 6 = 1

LPF f

0

 adjustment is defective

1

2

30

00

Set the data.

2

3

33

00

Set the data.

3

0

01

00

Set the data.

5-21

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

Not required

Measurement Point

Pin 8 of IC3302 on VC-275 board

Measuring Instrument

Frequency counter

Adjustment Page

F

Adjustment Address

12

Specified Value

f=13500000 

± 68Hz

1

0

01

01

Set the data.

2

F

12

Change the data and set the
frequency (f) to the specified
value.

3

F

12

Set the data, and press PAUSE
button.

4

0

01

00

Set the data.

Set the center frequency of IC3701 chroma band-pass filter.

Mode

VTR stop

Signal

No signal

Measurement Point

CH1: Chroma signal terminal of S
VIDEO OUT jack (75

Ω terminated)

CH2: Y signal terminal of S VIDEO
OUT jack (75

Ω terminated)

Measuring Instrument

Oscilloscope

Adjustment Page

C

Adjustment Address

28

Specified Value

A = 100mVp-p or less
B = 200mVp-p or more

1

0

01

01

Set the data.

2

Check that the burst signal (B) is
output to the chroma signal
terminal of S VIDEO OUT jack.

3

3

0C

04

Set the data, and press PAUSE
button.

4

C

28

Change the data for minimum
amplitude of the burst signal
level (A).
(The data should be “00” to
“0F”.)

5

C

28

Press PAUSE button.

6

3

0C

00

Set the data, and press PAUSE
button.

7

Check that the burst signal level
(B) satisfies the specified value.

8

0

01

00

Set the data.

Fig. 5-3-7.

Fig. 5-3-6.

1

20

10

11

IC3302

VC-275 board

5-22

Mode

VTR stop

Signal

No signal

Measurement Point

Y signal terminal of S VIDEO OUT
jack (75

Ω terminated)

Measuring Instrument

Oscilloscope

Adjustment Page

C

Adjustment Address

25

Specified Value

A = 1000 ± 14mV

DEMO MODE (Menu setting) ........................................ OFF

1

0

01

01

Set the data.

2

8

10

06

Set the data, and press PAUSE
button.

3

D

11

10

Set the data, and press PAUSE
button.

4

3

0C

02

Set the data, and press PAUSE
button.

5

C

25

Change the data and set the Y
signal level (A) to the specified
value.

6

C

25

Press PAUSE button.

7

3

0C

00

Set the data, and press PAUSE
button.

8

8

10

00

Set the data, and press PAUSE
button.

9

D

11

00

Set the data, and press PAUSE
button.

10

0

01

00

Set the data.

Fig. 5-3-8.

Mode

VTR stop

Signal

No signal

Measurement Point

Chroma signal terminal of S VIDEO
OUT jack (75

Ω terminated)

External trigger: Y signal terminal of
S VIDEO OUT jack

Measuring Instrument

Oscilloscope

Adjustment Page

C

Adjustment Address

26, 27

Specified Value

Cr level:

A = 714 ± 14mV (NTSC)
A = 700 ± 14mV (PAL)

Cb level:

B = 714 ± 14mV (NTSC)
B = 700 ± 14mV (PAL)

Burst level: C = 286 ± 6mV (NTSC)

C = 300 ± 6mV (PAL)

DEMO MODE (Menu setting) ........................................ OFF

1

0

01

01

Set the data.

2

8

10

06

Set the data, and press PAUSE button.

3

D

11

10

Set the data, and press PAUSE button.

4

3

0C

02

Set the data, and press PAUSE button.

5

C

26

Change the data and set the Cr signal
level (A) to the specified value.

6

C

26

Press PAUSE button.

7

C

27

Change the data and set the Cb signal
level (B) to the specified value.

8

C

27

Press PAUSE button.

9

Check that the burst signal level
(C) is satisfied the specified value.

10

3

0C

00

Set the data, and press PAUSE button.

11

8

10

00

Set the data, and press PAUSE button.

12

D

11

00

Set the data, and press PAUSE button.

13

0

01

00

Set the data.

Fig. 5-3-9.

µ

µ

µ

µ