10. PAL Hi8 REC C Current Adjustment
(VC-197 board)
Set the recording levels of the REC AFM signal and REC Note :ADo not inserTF signal.t a plug into the AUDIO (R) terminal.
If the level is too low, the audio S/N will deteriorate, tracking will
not be stable, or SP/LP will not be discriminated properlyConnection:. If too
high, color beets will be produced on the self-recording /playback1) Remove C1060 (0.01mF, near Pin 5 of IC101).
image.Note :After completing OREC L Level Adjustment� and
Adjust the REC chroma signal recording current.OREC C Current Adjustment�, replace C1060 with new
ModeVTR recordingparts (1-162-970-11 CERAMIC CHIP 0.01mF 10%
SignalNo signal25V).
2) Connect Pin ^L of IC101 and GND with a 0.01mF capacitor.
Measurement point2Pin of CN207 (REC RF)0.01mF capacitor: 1-101-004-00
Measuring instrument Oscilloscope
(20 MHz BW LIMIT: OFF)0.67?sec
Adjustment pageFCenter of the luminace line width
Adjustment address68 to 71
Specified value A = 35.7 ? 1.3 mVp-p (ME, E, SP mode)
Adjusting method:
A
1) Set page: 0, address: 01, data: 01.
2) Insert a tape, and set to recording mode.
3) Note down the data of page: F, address: 29, set data: 01, and
press the PAUSE button of the adjusting remote commander.
Center of the luminace line width
4) Note down the data of page: D, address: 10, set data: 06, and
press the PAUSE button of the adjusting remote commander.Fig. 5-3-17.
5) Set page: 2, address: 61, data: 30 and press the PAUSE button
of the adjusting remote commander.
6) Set page: 3, address: 01, data: 41 and press the PAUSE button
of the adjusting remote commander. (ME, E, SP mode)
7) Change the data of page: F, address: 69, and set the REC C
signal level (A) to the specified value.
8) Press the PAUSE button of the adjusting remote commander.
9) Read the page: F, address:69). 69, data (D
10) Convert D69 to a decimal number, to obtain D69?.
(Refer to Table 5-1-7. Hexadecimal notation-decimal notation
calculation table.)
11) Calculate the adjustment data (decimal) from the following
equations (decimal calculation), convert it to a hexadecimal
number, and input each adjustment address.
Address: 6868? = DD69?
Address: 6A6A? = DD69?
Address: 6B6B? = DD69?
Address: 6C6C? = DD69? + 14
Address: 6D6D? = DD69? + 14
Address: 6E6E? = DD69? + 14
Address: 6F6F? = DD69? + 14
Note :After setting each data, be sure to press the PAUSE
button of the adjusting remote commander.
12) After setting data noted down at step 3) for page: F, address:
29, press the PAUSE button of the adjusting remote commander.
13) After setting data noted down at step 4) for page: D, address:
10, press the PAUSE button of the adjusting remote commander.
14) Set page: 3, address: 01, data: 00 and press the PAUSE button
of the adjusting remote commander.
15) Set page: 3, address: 01, data: 00 page: 3, address: 01, and
press the PAUSE button of the adjusting remote commander.
16) Set page: 0, address: 01, data: 00.
5-32 |
ACEC
SONY
