Sony Handycam RMT-708 Service, Руководство по обслуживанию, Страница: 137 / 240

5-51
8. REC L Level Adjustment (VC-195 board)
Set the recording levels of the REC AFM signal and REC ATF signal.
If the level is too low, the audio S/N will deteriorated, tracking will
not be stable, or SP/LP will not be discriminated properly. If too
high, color beets will be produced on the self-recording/playback
image.
Mode VTR recording (SP mode)
Signal No signal
Measurement Point Pin
!º
of CN910 (REC RF)
Measuring Instrument Oscilloscope
(20MHz BW LIMIT: OFF)
Adjustment Page F
Adjustment Address 5B to 64
Specified Value A = 10.1
±
0.6mV (NTSC)
A = 11.0
±
0.7mV (PAL)
Note 1:
NTSC model: CCD-TRV95/TRV95PK/TRV99
PAL model: CCD-TRV89E/TRV95E/TRV99E
Note 2: Do not insert a plug into the AUDIO (R) terminal.
Connection:
1) Remove C085 (0.01
µ
F, Pin
!§
of IC202).
Note:
After completing “REC L Level Adjustment” and “REC C
Current Adjustment”, replace C085 with new parts (1-162-
970-11 CERAMIC CHIP 0.01
µ
F 10% 25V).
Preparations only for the model without REC switch:
1) Insert Hi8 ME tape.
2) 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) Set to recording mode. (Use the wireless remote commander
of 8mm VCR, or connect Pin
6
of CN 935 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 Hi8 ME tape, set to recording mode.
2) Select page: 0, address: 01, and set data: 01.
3) Select page: F, address: 5B, set data: FF, and press the PAUSE
button of the adjusting remote commander.
4) Select page: F, address: 65, set data: 00, and press the PAUSE
button of the adjusting remote commander.
5) Select page: F, address: 5C, change the data and set the REC
AFM signal level (A) to the specified value.
6) Press the PAUSE button of the adjusting remote commander.
7) Select page: F, address: 5C, read the data (D
5C
).
8) 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.)
NTSC model
Address: 5B D
5B
= D
5C
Address: 5D D
5D
= D
5C
–0C
Address: 5E D
5E
= D
5C
–0C
Address: 5F D
5F
= D
5C
+12
Address: 60 D
60
= D
5C
+12
Address: 61 D
61
= D
5C
+13
Address: 62 D
62
= D
5C
+13
PAL model
Address: 5B D
5B
= D
5C
Address: 5D D
5D
= D
5C
Address: 5E D
5E
= D
5C
Address: 5F D
5F
= D
5C
+12
Address: 60 D
60
= D
5C
+12
Address: 61 D
61
= D
5C
+12
Address: 62 D
62
= D
5C
+12
Note:
After setting each data, be sure to press the PAUSE button
of the adjusting remote commander.
9) Write the following data in page: F, address: 63 to 64.
Data
Address
NTSC PAL
63 7C 7A
64 78 7A
Note:
After setting each data, be sure to press the PAUSE button
of the adjusting remote commander.
10) Select page: 0, address: 01, and set data: 00.
11) Perform “REC C Current Adjustment”.
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.
Fig. 5-3-14.