Sony CCD-TRV300E Service Manual ▷ View online
5-43
3-4.
VIDEO SYSTEM ADJUSTMENTS
Video system adjustments must be performed in the following order.
[Adjusting Order]
1.
1.
28MHz origin oscillation adjustment
2.
AFC f0 adjustment
3.
Filter f0 adjustment
4.
Y OUT level adjustment
5.
C OUT level adjustment
6.
RP filter f0 adjustment
7.
REC Y current adjustment
8.
REC L level adjustment
9.
REC C current adjustment
1. 28 MHz Origin Oscillation Adjustment (VC-195 board)
Set the frequency of the clock for synchronization.
If deviated, the synchronization will be disrupted and the color will
become inconsistent.
If deviated, the synchronization will be disrupted and the color will
become inconsistent.
Mode
VTR stop
Signal
No signal
Measurement Point
Pin
^§ of IC202 or pin !™ of IC501
Measuring Instrument
Frequency counter
Adjustment Page
F
Adjustment Address
2C
Specified Value
Pin
^§ of IC202:
f=4433618.75
±
17Hz
Pin
!™ of IC501:
f=14187500
±
55Hz
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 3, address: 01, set data: 41, and press the PAUSE
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 3, address: 01, set data: 41, and press the PAUSE
button of the adjusting remote commander.
3) Select page: 2, address: 61, and set data: 30.
4) Select page: F, address: 2C, change the data and set the clock
4) Select page: F, address: 2C, change the data and set the clock
frequency(f) to the specified value.
5) Press the PAUSE button of the adjusting remote commander.
6) Select page: 2, address: 61, and set data: 10.
7) Select page: 3, address: 01, set data: 00, and press the PAUSE
6) Select page: 2, address: 61, and set data: 10.
7) Select page: 3, address: 01, set data: 00, and press the PAUSE
button of the adjusting remote commander.
6) Select page: 0, address: 01, and set data: 00.
2. AFC f0 Adjustment (VC-195 board)
Adjust the pull-in range of the A/D converted clock generator during
playback.
playback.
Mode
VTR stop
Signal
No signal
Measurement Point
Pin
4 of CN910 (AFC f0)
Measuring Instrument
Digital voltmeter
Adjustment Page
F
Adjustment Address
4A
Specified Value
A = 2.10
±
0.05Vdc
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 3, address: 01, set data: 4D, and press the PAUSE
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 3, address: 01, set data: 4D, and press the PAUSE
button of the adjusting remote commander.
3) Select page: F, address: 4A, change the data and set the DC
voltage (A) to the specified value.
4) Press the PAUSE button of the adjusting remote commander.
5) Select page: 3, address: 01, set data: 00, and press the PAUSE
5) Select page: 3, address: 01, set data: 00, and press the PAUSE
button of the adjusting remote commander.
6) Select page: 0, address: 01, and set data: 00.
5-44
4. Y OUT Level Adjustment (VC-195 board)
Set the Y signal output level.
Mode
VTR stop
Signal
No signal
Measurement Point
Y signal terminal of S VIDEO
terminal (75
terminal (75
Ω
terminated )
Measuring Instrument
Oscilloscope
Adjustment Page
F
Adjustment Address
49
Specified Value
A = 300
±
5mV
Note 1:
Insert the plug into the S video terminal.
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 3, address: 01, set data: 41, and press the PAUSE
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 3, address: 01, set data: 41, and press the PAUSE
button of the adjusting remote commander.
3) Select page: 2, address: 61, and set data: 30.
4) Select page: F, address: 49, change the data and set the SYNC
4) Select page: F, address: 49, change the data and set the SYNC
level (A) to the specified value.
5) Press the PAUSE button of the adjusting remote commander.
6) Select page: 2, address: 61, and set data: 10.
7) Select page: 3, address: 01, set data: 00, and press the PAUSE
6) Select page: 2, address: 61, and set data: 10.
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. 5-3-8.
3. Filter f0 Adjustment (VC-195 board)
Minimize the chroma signal residual components during composite
video signal input.
video signal input.
Mode
VTR stop
Signal
No signal
Measurement Point
Pin
3 of CN910 (IR VIDEO)
Measuring Instrument
Oscilloscope
Adjustment Page
F
Adjustment Address
4D
Specified Value
Minimum residual chroma signal
components (A=Bellow 12mV)
components (A=Bellow 12mV)
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 3, address: 01, set data: 4F, and press the PAUSE
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 3, address: 01, set data: 4F, and press the PAUSE
button of the adjusting remote commander.
3) Select page: F, address: 4D, change the data and minimize the
residual chroma signal components (A).
4) Press the PAUSE button of the adjusting remote commander.
5) Select page: 3, address: 01, set data: 00, and press the PAUSE
5) Select page: 3, address: 01, set data: 00, and press the PAUSE
button of the adjusting remote commander.
6) Select page: 0, address: 01, and set data: 00.
Fig. 5-3-7.
A
H
A
H
5-45
5. C OUT Level Adjustment (VC-195 board)
Set the chroma signal output level.
Mode
VTR stop
Signal
No signal
Measurement Point
Chroma signal terminal of S VIDEO
terminal (75
terminal (75
Ω
terminated)
Measuring Instrument
Oscilloscope
Adjustment Page
F
Adjustment Address
4B
Specified Value
A = 300
±
5mV
Note 1:
Insert the plug into the S video terminal.
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 3, address: 01, set data: 41, and press the PAUSE
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 3, address: 01, set data: 41, and press the PAUSE
button of the adjusting remote commander.
3) Select page: 2, address: 61, and set data: 30.
4) Select page: F, address: 4B, change the data and set the burst
4) Select page: F, address: 4B, change the data and set the burst
level (A) to the specified value.
5) Press the PAUSE button of the adjusting remote commander.
6) Select page: 2, address: 61, and set data: 10.
7) Select page: 3, address: 01, set data: 00, and press the PAUSE
6) Select page: 2, address: 61, and set data: 10.
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. 5-3-9.
6. RP Filter f0 Adjustment (VC-195 board)
Adjust the LPF of the playback RF amplifier.
Mode
VTR stop
Signal
No signal
Measurement Point
Pin
9 of CN910 (RF AGC OUT)
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
1) Input a 14.2MHz, 400mVp-p CW signal to Pin
7 of CN910
(RF AGC IN).
Fig. 5-3-10.
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
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) Select page: F, address: 4E, change the data and minimize the
14.2 MHz signal level (A).
4) Press the PAUSE button of the adjusting remote commander.
5) Select page: 3, address: 01, set data: 00, and press the PAUSE
5) Select page: 3, address: 01, set data: 00, and press the PAUSE
button of the adjusting remote commander.
6) Select page: 0, address: 01, and set data: 00.
Fig. 5-3-11.
Signal
generator
generator
14.2MHz 400mVp-p
0.01
µ
F
0.01
µ
F
15k
Ω
1k
Ω
47
Ω
Pin 5 of CN101 of
PJ-87 board
PJ-87 board
Pin 7 of CN910
(RF AGC IN)
(RF AGC IN)
Pin 8 of CN910
(REG GND)
(REG GND)
Transistor : General NPN transistor (2SC403. etc)
47
47
Ω
resistor :
1k
Ω
resistor :
15k
Ω
resistor :
0.01
µ
F capacitor :
1-249-401-11
1-249-417-11
1-249-431-11
1-101-004-00
1-249-417-11
1-249-431-11
1-101-004-00
A
H
5-46
7. REC Y Current Adjustment (VC-195 board)
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)
(20 MHz BW LIMIT: OFF)
Adjustment Page
F
Adjustment Address
53 to 5A
Specified Value
A = 185
±
5mV
Preparations:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: D, address: 14, after memorizing the data, set the
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”).
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
8mm VCR, or connect Pin
6 of CN935 of DD-105 board and
GND with 4.7k
Ω
resistor for a second.)
4.7k
Ω
resistor: 1-249-425-11
Adjusting method:
1) Insert a tape, set to recording mode. (Refer to “Preparations”.)
2) Select page: 0, address: 01, and set data: 01.
3) Select page: F, address: 5C, after note down the data , set data:
1) Insert a tape, set to recording mode. (Refer to “Preparations”.)
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.
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.
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
8) Select page: F, address: 54, and read the data (D
54
).
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. (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.
of the adjusting remote commander.
10) Write the following data in page: F, address: 57 to 5A.
Address
Data
57
A1
58
95
59
A1
5A
95
Note:
After setting each data, be sure to press the PAUSE button
of the adjusting remote commander.
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:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: D, address: 14, and set the data memorized at step
1) Select page: 0, address: 01, and set data: 01.
2) Select page: D, address: 14, and set the data memorized at step
2) of “Preparations”.
3) Press the PAUSE button of the adjusting remote commander.
4) Select page: D, address: 15, and set the data memorized at step
4) Select page: D, address: 15, and set the data memorized at step
3) of “Preparations”.
5) Press the PAUSE button of the adjusting remote commander.
6) Select page: 0, address: 01, and set data: 00.
6) Select page: 0, address: 01, and set data: 00.
Fig. 5-3-12.
