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6-31

CCD-TRV138/TRV238E/TRV338/TRV438E

1. Initialization of 8, A, C, D, E, F, 1F Page Data
If the 8, A, C, D, E, F, 1F page data is erased due to some reason,
perform “1-2. INITIALIZATION OF 8, A, C, D, E, F, 1F PAGE
DATA” of “6-1. CAMERA SECTION ADJUSTMENTS”.

Before perform the servo system adjustments, check that the speci-
fied values of “28 MHz Origin Oscillation Adjustment” of “VIDEO
SYSTEM ADJUSTMENTS” is satisfied.
Check that the data of page: 0, address: 10 is “00”.
If not, select page: 0, address: 10, and set the data “00”.

Set the CAP FG signal duty cycle to 50% to establish an appropri-
ate capstan servo. If deviated, the uneven rotation of capstan and
noise can occur in the playback mode.

Mode

VTR stop (PLAY/EDIT mode)

Signal

No signal

Measurement Point

Displayed data of page: 3, address: 03

Measuring Instrument

Adjusting remote commander

Adjustment Page

C

Adjustment Address

18

Specified value

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

Note 1: Check that the data of page: 0, address: 10 is “00”.

Order Page Address Data

Procedure

1

Close the cassette compartment
without inserting cassette.

2

0

01

01

3

3

01

81

Press PAUSE button.

4

3

02

Check the data changes to
“00”.

5

3

03

Check that the data is “00”.
(Note 2)

6

0

01

00

Note 2: If the data is other than “00”, adjustment has errors.

For the error contents, see the following table.

Data of page: 3,

Error contents

address: 03

01

Adjustment time out (Note 3)

10

Mechanism mode error (For example, the
adjustment is performed in the mode except
for VTR stop mode.)

Note 3: In case of the adjustment time out, perform readjustment

by the method given below.

Order Page Address Data

Procedure

1

3

01

81

Press PAUSE button.

2

Wait for 5 seconds.

3

C

18

90

Press PAUSE button.

4

3

02

Check the data changes to
“00”.

5

3

03

Check the data.

00: Normal
01: Go to step 7.

6

C

18

Check the data.

90: Go to step 7.
Other than 90: Adjustment end.

7

3

01

81

8

Wait for 5 seconds.

9

C

18

70

Press PAUSE button.

10

3

02

Check the data changes to
“00”.

11

3

03

Check the data.

00: Normal
01: Perform adjustment

from the beginning.
(Note 4)

12

C

18

Check the data.

70: Perform adjustment from

the beginning. (Note 4)

Other than 70: Adjustment end.

Note 4: NG if an error occurred again.

6-32

CCD-TRV138/TRV238E/TRV338/TRV438E

2. Switching Position Adjustment (VC-341 Board)
If deviated in this case cause switching noise or jitter on the played
back screen.

Mode

VTR playback

Signal

Alignment tape:

For tracking adjustment
(WR5-1NU (NTSC))
(WR5-1CU (PAL))

Measurement Point

CH1: SWU (Pin 5 of CN007)
CH2: PB RF (Pin 9 of CN007)

Measuring Instrument

Oscilloscope

Adjustment Page

C

Adjustment Address

16, 17

Specified value

t1 = 0 

± 10 µsec

Note 1: Check that the data of page: 0, address: 10 is “00”.

Order Page Address Data

Procedure

1

0

01

01

2

3

92

Set the bit value of bit 2 to “1”,
and press PAUSE button.
(Note 2)

3

C

16

Change the data and minimize
“t1”. (Coarse adjustment)

4

C

16

Press PAUSE button.

5

C

17

Change the data and adjust so
that the switching position (t1)
becomes specified value. (Fine
adjustment)

6

C

17

Press PAUSE button.

7

3

92

Set the bit value of bit 2 to “0”,
and press PAUSE button.
(Note 2)

8

0

01

00

Note 2: For the bit values, refer to  “6-4. SERVICE MODE”, “4-

3. 3. Bit Value Discrimination”.

CH1

CH2

Enlargement

t1=0 

± 10 µsec

CH1

CH2

6-33

CCD-TRV138/TRV238E/TRV338/TRV438E

Before perform the video system adjustments, check that the data
of page: 0, address: 10 is “00”.
If not, select page: 0, address: 10, and set the data “00”.
Video system adjustments must be performed in the following or-
der.

Adjusting procedure:
1. 28 MHz origin oscillation adjustment
2. AFC f

0

 adjustment

3. LINE OUT level adjustment
4. REC Y current adjustment
5. REC C/AFM 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 (PLAY/EDIT mode)

Signal

No signal

Measurement Point

Pin qa of IC151

Measuring Instrument

Frequency counter

Adjustment Page

F

Adjustment Address

10

Specified value

f = 14318181 

± 68 Hz (NTSC model)

f = 14187500 

± 54 Hz (PAL model)

Note 1: Check that the data of page: 0, address: 10 is “00”.
Note 2: Refer to “2. DISASSEMBLY”, when opening the VC-

341 board.

Order Page Address Data

Procedure

1

0

01

01

2

F

10

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

3

F

10

Press PAUSE button.

4

0

01

00

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

Mode

VTR stop (PLAY/EDIT mode)

Signal

No signal

Measurement Point

Displayed data of page: 3, address: 03

Measuring Instrument

Adjusting remote commander

Adjustment Page

C

Adjustment Address

19

Specified value

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

Note 1: Check that the data of page: 0, address: 10 is “00”.

Order Page Address Data

Procedure

1

Close the cassette compartment
without inserting cassette.

2

0

01

01

3

3

01

82

Press PAUSE button.

4

3

02

Check the data changes to
“00”.

5

3

03

Check that the data is “00”.
(Note 2)

6

0

01

00

Note 2: If the data is other than“00”, adjustment has errors.

IC151

13

12 11 1

36

25

24

48

37

Measurement
Point

VC-341 BOARD (SIDE B)

6-34

CCD-TRV138/TRV238E/TRV338/TRV438E

Mode

VTR stop (PLAY/EDIT mode)

Signal

No signal

Measurement Point

Video terminal of A/V OUT jack
(75 

Ω terminated)

Measuring Instrument

Oscilloscope

Adjustment Page

C

Adjustment Address

1A, 1B

Specified value

Sync level:

A = 286 

± 5 mVp-p (NTSC)

A = 300 

± 5 mVp-p (PAL)

Burst level:

B = 286 

± 5 mVp-p (NTSC)

B = 300 

± 5 mVp-p (PAL)

Note:  Check that the data of page: 0, address: 10 is “00”.

Order Page Address Data

Procedure

1

0

01

01

2

D

10

02

Press PAUSE button.

3

C

1A

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

4

C

1A

Press PAUSE button.

5

C

1B

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

6

C

1B

Press PAUSE button.

7

D

10

00

Press PAUSE button.

H

B

A