Read Sony CCD-TR913E / CCD-TR950E Service Manual online
5-38
A
0.18
µ
sec
Fig. 5-3-12.
7. REC Y Current Adjustment (VC-214 board)
Adjust the Y FM signal recording current.
Mode
VTR recording (SP mode)
Signal
No signal
Measurement Point
Pin 0 of CN910 (REC RF)
Measuring Instrument
Oscilloscope
(20 MHz BW LIMIT: OFF)
(20 MHz BW LIMIT: OFF)
Adjustment Page
F
Adjustment Address
73 to 7A
Specified Value
A=185 ± 5mV
Preparations only for the model without REC switch:
1)
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 “4-3, 3. Bit value
discrimination” of “5-4. Service Mode”).
bit value of bit1 to “1”. (Refer to “4-3, 3. Bit value
discrimination” of “5-4. Service Mode”).
3)
Select page: D, address: 15, after memorizing the data, set the
bit value of bit7 to “0”.
bit value of bit7 to “0”.
4)
Insert a tape, and set to recording mode. (Use the wireless
remote commander of 8mm VCR.)
remote commander of 8mm VCR.)
Adjusting method:
1)
1)
Insert a tape, and set to recording mode.
2)
Select page: 0, address: 01, and set data: 01.
3)
Select page: F, address: 7C, after note down the data , set data:
00, and press the PAUSE button of the adjustment remote
commander.
00, and press the PAUSE button of the adjustment remote
commander.
4)
Select page: F, address: 85, after note down the data , set data:
00, and press the PAUSE button of the adjustment remote
commander.
00, and press the PAUSE button of the adjustment remote
commander.
5)
Select page: 2, address: 01, set data: 41, and press the PAUSE
button of the adjustment remote commander.
button of the adjustment remote commander.
6)
Select page: F, address: 74 , change the data and set the Y signal
level (A) to the specified value.
level (A) to the specified value.
7)
Press the PAUSE button of the adjustment remote commander.
8)
Select page: F, address: 74 , and read the data (D
74
).
9)
Calculate the adjustment data from the following equations,
and input each adjustment address.
and input each adjustment address.
Address: 73
D
73
= D
74
Address: 75
D
75
= D
74
Address: 76
D
76
= D
74
Note:
After setting each data, be sure to press the PAUSE button of
the adjustment remote commander.
the adjustment remote commander.
10) Write the following data in page: F, address: 77 to 7A .
Note:
After setting each data, be sure to press the PAUSE button of
the adjustment remote commander.
the adjustment remote commander.
11) Select page: F, address: 7C, set the data noted down at step 3),
and press the PAUSE button of the adjustment remote
commander.
commander.
12) Select page: F, address: 85, set the data noted down at step 4),
and press the PAUSE button of the adjustment remote
commander.
commander.
13) Select page: 2, address: 01, set data: 00, and press the PAUSE
button of the adjustment remote commander.
14) Select page: 0, address: 01, and set data: 00.
Address
77
78
79
7A
Data
63
6B
63
6B
Processing after completed adjustment only for the model
without REC switch:
1)
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
2) of “Preparations only for the model without REC switch”.
2) of “Preparations only for the model without REC switch”.
3)
Press the PAUSE button of the adjustment remote commander.
4)
Select page: D, address: 15, and set the data memorized at step
3) of “Preparations only for the model without REC switch”.
3) of “Preparations only for the model without REC switch”.
5)
Press the PAUSE button.
6)
Select page: 0, address: 01, and set data: 00.
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