Rp Filter F0 Adjustment (Vc-195 Board); Hi8 Rec Y Current Adjustment (Vc-195 Board) (Ccd-Tr917/Tr940/Tr940Pk) - Sony Handycam CCD-TR57 Service Manual

6. RP Filter f0 Adjustment (VC-195 board)

Adjust the LPF of the playback RF amplifier.
Mode VTR stop
Signal No signal
Pin 9 of CN910 (RF AGC OUT)
Measurement Point
Measuring Instrument Oscilloscope
Adjustment Page F
Adjustment Address 4E
Specified Value A = Below 10mVp-p
Connection:
1) Input a 14.2MHz, 400mVp-p CW signal to Pin 7 of CN910
(RF AGC IN).
14.2 MHz 400 mVp-p
Signal
generator
0.01 µ F
47 Ω
Transistor : General NPN transistor (2SC403. etc)
47 Ω resistor :
1-249-401-11
1 k Ω resistor :
1-249-417-11
15 k Ω resistor :
1-249-431-11
0.01 µ F capacitor :
1-101-004-00
Fig. 5-3-11.
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 3, address: 01, set data: 35, and press the PAUSE
button of the adjusting remote commander.
3) Only for Standard8 model, select page: D, address: 15, after
memorizing the data , set the bit value of bit0 to "1". (Refer to
"3. Bit value discrimination" of "3-1-8. Service Mode".).
4) Select page: F, address: 4E, change the data and minimize the
14.2 MHz signal level (A).
5) Press the PAUSE button of the adjusting remote commander.
6) Select page: D, address: 15, and set the data memorized at step
3), and press the PAUSE button of the adjusting remote
commander..
7) Select page: 3, address: 01, set data: 00, and press the PAUSE
button of the adjusting remote commander.
8) Select page: 0, address: 01, and set data: 00.
Fig. 5-3-12.
Pin 5 of CN101 of
PJ-81 board
1 k Ω
0.01 µ F
Pin 7 of CN910
(RF AGC IN)
Pin 8 of CN910
(REG GND)
15 k Ω
7. Hi8 REC Y Current Adjustment (VC-195 board)
(CCD-TR917/TR940/TR940PK)
Adjust the Y FM signal recording current.
Mode
Signal
Measurement Point
Measuring Instrument Oscilloscope
Adjustment Page
Adjustment Address
Specified Value
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
Address: 55
Address: 56
Note: After setting each data, be sure to press the PAUSE button
of the adjusting remote commander.
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.
5-41
VTR recording (SP mode)
No signal
Pin !º of CN910 (REC RF)
(20 MHz BW LIMIT: OFF)
F
53 to 5A
A = 160±5mV
).
54
D = D
53 54
D = D + 10
55 54
D = D + 10
56 54
Data
A0
80
90
80
Fig. 5-3-13.