Rec Y Level Adjustment - Sony CCD-TRV32 Service Manual

3-16. REC Y LEVEL ADJUSTMENT

Purpose : Maintains a constant level of Y FM, chroma
AFM and ATF signals when recording on tape.
Adjustment error : (If level is low) Poor S/N of playback picture
(If level is high) Black streaking noise appears.
Connect CN102 pin 8 (RF SWP) to GND.
Connection :
Mode CAM-REC (SP)
Signal No signal
CN102 pin 2 (check connector)
Measurement Point
Measuring Instrument Oscilloscope (Note)
Adjustment Page F
Adjustment Address 35
A=132 ± 5mVp-p (PAL)
Specification Value
A=155 ± 5mVp-p (NTSC)
Adjustment procedure:
Order Page Address
1 6 00
2
3 6 01
4 6 01
5 F 35
6
7 6 01
8 6 00
Data
01 After setting the data, press the PAUSE button. (Preparation)
Insert the MP tape to establish record mode.
Read the data of page : 6, address : 01, and record it.
43 After setting the data, press the PAUSE button.
Change data using PLAY and STOP buttons so that the REC Y RF level (A) satisfies the
specification.
Press the PAUSE button.
Set the data which is recorded in step 3 to this address and, press the PAUSE button.
00 After setting the data, press the PAUSE button. (End)
Note : Use the MP type tape. If an oscilloscope has the bandwidth
limiting switch, set to on position.
0.208 µsec
Procedure
6-74
Center of luminance
line width
A