Sony CCD-TRV15 Service Manual page 138

8. Standard8 REC Y Current Adjustment (VC-195 board)
(CCD-TRV15/ TRV15E/ TRV15EP/ TRV15PK/ TRV25/
TRV25PK/ TRV35/ TRV35E/ TRV215)
Adjust the Y FM signal recording current.
Mode VTR recording (SP mode)
Signal No signal
Pin !º of CN910 (REC RF)
Measurement Point
Measuring Instrument Oscilloscope
(20 MHz BW LIMIT: OFF)
Adjustment Page F
Adjustment Address 53 to 5A
Specified Value A = 170±5mV (NTSC)
A = 185±5mV (PAL)
Note 1: NTSC MODEL: CCD-TRV15/ TRV15PK/ TRV25/
TRV25PK/ TRV35/ TRV215
PAL MODEL: CCD-TRV15E/ TRV15EP/ TRV35E
Preparations only for the model without REC switch:
1) Select page: 0, address: 01, and set data: 01.
3) Select page: D, address: 14, after memorizing the data, set the
bit value of bit1 to "1". (Refer to "3. Bit value discrimination"
of "3-1-8. Service mode").
4) Select page: D, address: 15, after memorizing the data , set the
bit value of bit7 to "0".
5) Turn off the HOLD switch of the adjusting remote commander,
and press the REC buttons and set to recording mode.
Adjusting method:
1) Insert a tape, set to recording mode.
2) Select page: 0, address: 01, and set data: 01.
3) Select page: F, address: 5C, after note down the data , set data:
FF, and press the PAUSE button of the adjusting remote
commander.
4) Select page: F, address: 65, after note down the data , set data:
00, and press the PAUSE button of the adjusting remote
commander.
5) Select page: 3, address: 01, set data: 41, and press the PAUSE
button of the adjusting remote commander.
6) Select page: F, address: 54, change the data and set the Y signal
level (A) to the specified value.
7) Press the PAUSE button of the adjusting remote commander.
8) Select page: F, address: 54, and read the data (D
9) Calculate the adjustment data (hexadecimal) from the following
equations (hexadecimal calculation), and input each adjustment
address. (Refer to Table 5-1-2. Hexadecimal-Decimal
conversion Table.)
Address: 53 D
Address: 55 D
Address: 56 D
Note: After setting each data, be sure to press the PAUSE button
of the adjusting remote commander.
).
54
= D
53 54
= D
55 54
= D
56 54
10) Write the following data in page: F, address: 57 to 5A.
Address
57
58
59
5A
Note: After setting each data, be sure to press the PAUSE button
of the adjusting remote commander.
11) Select page: F, address: 5C, set the data noted down at step 3),
press the PAUSE button of the adjusting remote commander.
12) Select page: F, address: 65, set the data noted down at step 4),
press the PAUSE button of the adjusting remote commander.
13) Select page: 3, address: 01, set data: 00, and press the PAUSE
button of the adjusting remote commander.
14) 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
3) of "Preparations only for the model without REC switch".
3) Press the PAUSE button of the adjusting remote commander.
4) Select page: D, address: 15, and set the data memorized at step
4) of "Preparations only for the model without REC switch".
5) Press the PAUSE button of the adjusting remote commander.
6) Select page: 0, address: 01, and set data: 00.
5-51
Data
NTSC PAL
80 80
80 80
80 80
80 80
Fig. 5-3-14.