Samsung VP-M50, Service Manual

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So you have to do it carefully.
a. Preparations
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 below.
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
12
10
8
6
4
2
13
11
9
7
5
3
1
13 VIDEO OUT
12
11
10
9
8
7
6
5
4
3
2
1
NC
PB RF
AUDIO OUT
HD SW
VCR UNREG
JIG CS
VCR UNREG
JIG SCK
SS GND
JIG SO
JIG DETECT
JIG SI
VIDEO GND 14
CN452
h. Be sure to press the “MENU(CONFIRM)” but-
ton 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
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 “Z.RETURN(DATA DOWN)/
TITLE(DATA UP)” button so as to set the fre-
quency to 4.38MHz±0.02MHz.
i. Be sure to press the “MENU(CONFIRM)” but-
ton of FUNCTION to memorize setting.
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
though the adjustment is performed in VCR
record mode.
Samsung Electronics 4-42
Alignment and Adjustment
TAPE NORMAL TAPE FOR RECORDING
OSCILLOSCOPE
NONE
IC201 PIN41
0A
Y-FM CARRIER (NOR)
EQUIPMENT
OTHER
TEST POINT
ADDRESS
NAME
TAPE NORMAL TAPE FOR RECORDING
OSCILLOSCOPE
NONE
CN452 PIN13
0B
Y-FM DEVIAT (NOR)
EQUIPMENT
OTHER
TEST POINT
ADDRESS
NAME