DCR-TRV738E, DCR-TRV740, DCR-TRV740E, DCR-TRV840 (serv.man2) - Sony Movie Service Manual (repair manual). Page 115

5-49

Before perform the servo and RF system adjustments, check that
the specified value of “54MHz/66MHz Origin Oscillation
Adjustment” of “VIDEO SYSTEM ADJUSTMENT” is satisfied.
And check that the data of page: 0, address: 10 is “00”. If not, set
data: 00 to this address.

NTSC model: DCR-TRV740/TRV840
PAL model: DCR-TRV738E/TRV740E

Adjusting Procedure:
1.

REEL FG adjustment

2.

PLL f

0

 & LPF f

0

 adjustment

3.

Switching position adjustment

4.

AGC center level and APC & AEQ adjustment

5.

PLL f

0

 & LPF f

0

 fine adjustment

6.

Hi8/Standrd8 switching position adjustment

7.

Cap FG duty adjustment

Compensates the dispersion of the hall elements.

Measurement Point

Display data of page: 3, address: 03

Measuring Instrument

Adjustment remote commander

Adjustment Page

C

Adjustment Address

17, 2F

Specified Value

00 or 01 or 04 or 05

The data of page: 0, address: 10 must be “00”.

1

Close the cassette compartment
without inserting a cassette.

2

0

01

01

Set the data.

3

3

01

1C

Set the data, and press PAUSE
button.

4

3

02

Check that the data changes to
“00”,

5

3

03

Check that the data is “00” or “01”
or “04” or “05”. (Note)

6

0

01

00

Set the data.

If the data is other value, adjustment has errors. (Take an appropriate
remedial measures according to the errors referring to the following
table.)

Data

Contents of defect

02, 03, 06, 07

T reel is defective

08, 09, 0C, 0D

S reel is defective

0A, 0B, 0E, 0F

S reel and T reel are defective

Mode

VTR stop

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”.

The data of page: 0, address: 10 must be “00”.

1

0

01

01

Set the data.

2

C

21

CA

Set the data, and press PAUSE
button.

3

3

01

00

Set the data, and press PAUSE
button.

4

3

01

30

Set the data, and press PAUSE
button.

5

3

02

Check that the data changes to
“00” with in 10 sec. (Note2)

6

3

03

Check that the data is “00”.
(Note2)

7

0

01

00

Set the data.

If it isn’t satisfied, select page: C, address: 21, set the following
data, and press the PAUSE button, and repeat steps 3 to 6.

Setting data

When the data of page: C, address: 21 is “CA”.

CE

When the data of page: C, address: 21 is “CE”.

C6

When the data of page: C, address: 21 is “C6”.

D2

When the data of page: C, address: 21 is “D2”

C2

There are errors when it isn’t satisfied even if the above treatment is
done.
If bit2, bit3, bit4, bit5 or bit 6 of the data of page: 3, address: 03 is
“1”, 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