Sony Handycam CCD-TR913E, Service Manual

Page: 125 / 161

5-45
2. 1.7 MHz Deviation Adjustment (VC-214 board)
Sets the spectrum of the R-ch ((L-R)/2 signal) level modulated during
recording. If deviated, the crosstalk signal of the audio signal will
occur and the audio level will drop during both playback and
recording.
Mode VTR recording
Signal Input the AFM DEV jig output signal to
the left and right audio input terminal
Measurement Point CH1: AFM DEV jig TP32
CH2: AFM DEV jig TP2
Measuring Instrument Oscilloscope
ADD mode
CH2 normal mode
Adjustment Page F
Adjustment Address 63
Specified Value The level difference between CH1 signal
and CH2 signal should be minimum.
Connection:
1)
Connect TP24 ,TP25 and TP26 of the AFM DEV jig to CN910
of the VC-214 board.
TP24(GND) ................ Pin
8
of CN910
TP25(REC RF) ........... Pin
0
of CN910
TP26(RF SWP) .......... Pin
!¡
of CN910
2) Connect the audio output terminal (J1 and J2) of the AFM DEV
jig to AUDIO terminal of the unit.
3) Connect TP28(DC), TP27(GND) of the AFM DEV jig to the
DC power supply (+7Vdc to +9Vdc).
4) Set the AFM DEV jig switches to the following positions.
S1 ........................... BIL Position
S2 ........................... PAL Position
S3 ........................... INV Position
Preparations only for the model without REC switch:
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”).
3) Select page: D, address: 15, after memorizing the data, set the
bit value of bit7 to “0”.
4) Set to recording mode. (Use the wireless remote commander
of 8mm VCR.)
Adjusting method :
1)
Match the vertical ranges of CH1 and CH2 of the oscilloscope
to each other.
2) Set the oscilloscope to the ADD mode and CH2 to the normal
mode.
3) Select page: 0, address: 01, and set data: 01.
4) Select page: F, address: 63, change the data and minimize the
audio signal level difference (A).
5) Press the PAUSE button of the adjustment remote commander.
6) Select page: 0, address: 01, and set data: 00.
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
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”.
5) Press the PAUSE button.
6) Select page: 0, address: 01, and set data: 00.
A
Approx. 2msec
Fig. 5-3-21.