Samsung VPL500 Service Manual page 65

Alignment and Adjustment
h. Be sure to press the "PROGRAM AE(CON-
FIRM)" button on FUNCTION to memorize
setting.
i. Reset the power source so as to fix the new data
to the camcorder's EEPROM.
2-9. Y-FM Carrier (NOR)
: This adjustment is performed to set the sync-
tip level of the composite video signal.
Maladjusted Y-FM carrier impact to the play-
back picture, there may be black or white dot
noise.
a. Preparations
TAPE NORMAL TAPE FOR RECORDING
EQUIPMENT OSCILLOSCOPE
OTHER NONE
TEST POINT IC201 PIN41
ADDRESS 0A
NAME Y-FM CARRIER (NOR)
b. Connect a power source.
c. Get into the VCR adjustment mode.
d. Press the "FADE(MODE UP)" "BLC (MODE
DOWN)" button of FUNCTION so as to select
the address 0A.
e. Insert a Normal Tape to the camcorder.
f. Press the "START/STOP" button on the Rear
board so as to set the camcorder to RECORD-
ING mode.
g. Connect the frequency counter to the addressed
Test Point.
h. Press the "TITLE(DATA DOWN)/ DSE(DATA
UP)" button so as to set the frequency to
4.38MHz±0.02MHz.
i. Be sure to press the "PROGRAM AE(CON-
FIRM)" button of FUNCTION to memorize set-
ting.
j. Reset the power source so as to fix the new data
to the camcorder's EEPROM.
2-10. Y-FM DEVIATION (NOR)
: This adjustment sets the Y-FM modulation
level in recording. For adjustment, playback
the self-recorded signal and observe the
VIDEO OUT signal.
* Note : It is a little difficult to adjust because you
can check the waveform in playback mode even
4-46
though the adjustment is performed in VCR
record mode.
So you have to do it carefully.
a. Preparations
TAPE NORMAL TAPE FOR RECORDING
EQUIPMENT OSCILLOSCOPE
OTHER NONE
TEST POINT CN452 PIN13
ADDRESS 0B
NAME Y-FM DEVIAT (NOR)
b. Connect a power source.
c. Get into the VCR adjustment mode.
d. Press the "FADE(MODE UP)" or "BLC(MODE
DOWN)" button of FUNCTION so as to select
the address 0B.
e. Insert a NORMAL Tape to the camcorder.
f. Press the "START/STOP" button on the Rear
board so as to set the camcorder to RECORD-
ING mode.
g. Record for enough time to check the waveform
when you playback where you recorded in
step f).
* 1 minute may be enough to check the waveform
in playback mode.
h. Connect the oscilloscope to the addressed Test
Point.
i. Make sure that the waveform is to be as typical
wave form on the next page.
(If OK, go to step l).
j. In case of the waveform level is bigger than
1Vp-p, press the Data Down button so as to set
to down the waveform level and if the wave-
form level smaller than 1Vp-p, press the Data
Up button so as to set to up the waveform level.
k. Repeat step g), h), i).
14
13
CN452
12
11
14 13
10
12 11
10 9
8 7
6 5
4 3
2 1
VIDEO GND
VIDEO OUT
NC
PB RF
AUDIO OUT
9 HD SW
8 VCR UNREG
7 JIG CS
6 VCR UNREG
5 JIG SCK
4 SS GND
3 JIG SO
2 JIG DETECT
1 JIG SI
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