Standerd8 Rec L Level Adjustment - Sony CCD-TRV15 Service Manual

10. Standard8 REC L Level Adjustment (VC-195 board)
(CCD-TRV15/ TRV15E/ TRV15EP/ TRV15PK/ TRV25/
TRV25PK/ TRV35/ TRV35E/ TRV215)
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
Pin !º of CN910 (REC RF)
Measurement Point
Measuring Instrument Oscilloscope
(20MHz BW LIMIT: OFF)
Adjustment Page F
Adjustment Address 5B to 64
Specified Value A = 9.6±0.6mV (NTSC)
A = 9.3±0.5mV (PAL)
Note 1: NTSC MODEL: CCD-TRV15/ TRV15PK/ TRV25/
TRV25PK/ TRV35/ TRV215
PAL MODEL: CCD-TRV15E/ TRV15EP/ TRV35E
Note 2: Do not insert a plug into the AUDIO (R) terminal.
Connection:
1) Remove C085 (0.01µF, 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 0.01µF 10% 25V).
Preparations only for the model without REC switch:
1) 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) Turn off the HOLD switch of the adjusting remote commander,
and press the REC buttons and set to recording mode.
Adjusting method:
1) Insert Srandrd8 MP 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
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.)
Address: 5B D
5B
Address: 5D D
5D
Address: 5E D
5E
Address: 5F D
5F
Address: 60 D
60
Address: 61 D
61
Address: 62 D
62
Note: After setting each data, be sure to press the PAUSE button
of the adjusting remote commander.
).
5C
= D
5C
= D
5C
= D
5C
= D
5C
= D
5C
= D
5C
= D
5C
9) Write the following data in page: F, address: 63 to 64.
Address
NTSC
63
64
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.
5-53
Data
PAL
80 80
80 80
Fig. 5-3-16.