Sony CCD-TRV26E, Service Manual, Page: 136 / 181

5-52
8. Standard8 REC Y Current Adjustment (VC-215 board)
CCD-TR315E/TR415E/TR425E
CCD-TRV16E/TRV26E/TRV27E/TRV27EP
Adjust the Y FM signal recording current.
Mode VTR recording (SP mode)
Signal No signal
Measurement Point Pin
!º
of CN910 (REC RF)
Measuring Instrument Oscilloscope
(20 MHz BW LIMIT: OFF)
Adjustment Page F
Adjustment Address 53 to 5A
Specified Value A = 185±5mV
Adjusting method:
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 “3. Bit value discrimination”
of “3-1-8. Service mode”).
3) Select page: D, address: 15, after memorizing the data , set the
bit value of bit7 to “0”.
4) Set to recording mode. (Use the wireless remote commander
of 8mm VCR, or connect Pin
6
of CN935 of DD-117 board
and GND with 4.7k
Ω
registor for a second.)
4.7k
Ω
registor : 1-249-425-11
5) Insert a tape, set to recording mode.
6)
Select page: 0, address: 01, and set data: 01.
7) Select page: F, address: 5C, after note down the data , set data:
FF, and press the PAUSE button of the adjusting remote
commander.
8) Select page: F, address: 65, after note down the data , set data:
00, and press the PAUSE button of the adjusting remote
commander.
9) Select page: 3, address: 01, set data: 41, and press the PAUSE
button of the adjusting remote commander.
10) Select page: F, address: 54, change the data and set the Y signal
level (A) to the specified value.
11) Press the PAUSE button of the adjusting remote commander.
12) Select page: F, address: 54, and read the data (D
54
).
13) Calculate the adjustment data (hexadecimal) from the follow-
ing equations (hexadecimal calculation), and input each adjust-
ment address. (Refer to Table 5-1-2. Hexadecimal-Decimal
conversion Table.)
Address: 53 D
53
= D
54
Address: 55 D
55
= D
54
Address: 56 D
56
= D
54
Note:
After setting each data, be sure to press the PAUSE button
of the adjusting remote commander.
14) Write the following data in page: F, address: 57 to 5A.
Address Data
57 80
58 80
59 80
5A 80
Note: After setting each data, be sure to press the PAUSE button
of the adjusting remote commander.
15) Select page: F, address: 5C, set the data noted down at step 3),
press the PAUSE button of the adjusting remote commander.
16) Select page: F, address: 65, set the data noted down at step 4),
press the PAUSE button of the adjusting remote commander.
17) Select page: 3, address: 01, set data: 00, and press the PAUSE
button of the adjusting remote commander.
18) Select page: 0, address: 01, and set data: 00.
19) Select page: 0, address: 01, and set data: 01.
20) Select page: D, address: 14, and set the data memorized.
21) Press the PAUSE button of the adjusting remote commander.
22) Select page: D, address: 15, and set the data memorized.
23) Press the PAUSE button of the adjusting remote commander.
24) Select page: 0, address: 01, and set data: 00.
Fig. 5-3-13.