Alignment and adjustment
Samsung Electronics
5-25
5-3 VCR Section Adjustment
5-3-1 Preparations
1. Equipment :
1) Monitor TV.
2) Dual trace oscilloscope of over 20MHz band,
incorporates delay mode.
(Use 10 : 1 probe unless otherwise specified.)
3) Frequency counter
4) Pattern generator with video output terminal.
5) Digital voltmeter.
6) DC power supply.
7) Alignment tape (Color bar : SP)
2. Composition of VCR PCBoards
1) Main PCB (system control/servo, video,
audio,DC/DC converter, camera)
2) Rear PCB
3) Battery-Terminal PCB
4) Front PCB
3. Set-up during adjustment
Since the video output signal obtained from the
pattern generator is used as the adjusting signal for
the VCR block, it is necessary that this video
output signal be within the required specifications.
Connect an oscilloscope to video input jack and
make sure that the amplitude of the video SYNC
signal is approximately 0.3V, that the video block
amplitude is approximately 0.7V, that the burst
signal amplitudeis approximately 0.3V with fiat
characterics, and the signal level ratio between the
burst signal and ÒRedÓ signal is 0.30 : 0.66.
The video signal ( color bars ) used for VCR block
electrical adjustment are shown in figure 1.
4. How to get into srvice Ò
ADJUST
Ó mode
WHITE(APPROX. 100%)
1.0 0.05Vp-p
H
APPROX.
0.7V
APPROX.
0.3V
Fig. 1 Color bar signal pattern generator
1. Connect the power source (battery/DC cable).
2. Set the knob-power of the camcorder to VCR
position.
3. Press the ÒEJECTÓ button to eject mode.
STEP 1
1. Press and hold ÓEJECTÓ button and ÒDATEÓ
button on the REAR board at the same time for
more than 5 seconds.
2. If OSD Shows like the figure below, VCR
adjustment mode has been successfully
activated.
3. Insert tape into housing assy and then
perform the adjustments.
STEP 2
0:00:00
0. EMPHA
EPR:XX EVR:XX
Summary of Contents for SCA20
Page 5: ...Reference Information 2 2 Samsung Electronics 2 1 2 IC601 CXP87240A ...
Page 6: ...Reference Information Samsung Electronics 2 3 2 1 3 IC201 CXA1700R ...
Page 7: ...Reference Information 2 4 Samsung Electronics 2 1 4 IC501 KA8322 ...
Page 8: ...Reference Information Samsung Electronics 2 5 2 1 5 ICP01 KS7213 ...
Page 9: ...Reference Information 2 6 Samsung Electronics 2 1 6 ICP03 TDA8786A AD CONVERTER ...
Page 10: ...Reference Information Samsung Electronics 2 7 2 1 7 ICP04 KS7306 DSP ...
Page 11: ...Reference Information 2 8 Samsung Electronics 2 1 8 ICP05 UPD784035 AF MICOM ...
Page 12: ...Reference Information Samsung Electronics 2 9 2 1 9 ICZ01 KS7314 D ZOOM ...
Page 80: ...Exploded View and Parts List 6 18 Samsung Electronics MEMO ...
Page 92: ...Block Diagrams 8 2 Samsung Electronics 8 1 Overall Block Diagram Camera ...
Page 93: ...Block Diagrams Samsung Electronics 8 3 8 2 Overall Block Diagram VCR ...
Page 94: ...Block Diagrams 8 4 Samsung Electronics 8 3 DC DC Converter ...
Page 95: ...Block Diagrams Samsung Electronics 8 5 8 4 Drum Servo ...
Page 96: ...Block Diagrams 8 6 Samsung Electronics 8 5 Capstan Servo ...
Page 97: ...Block Diagrams Samsung Electronics 8 7 8 6 Video Playback ...
Page 98: ...Block Diagrams 8 8 Samsung Electronics 8 7 Video Record ...
Page 99: ...Block Diagrams Samsung Electronics 8 9 8 8 Audio ...
Page 100: ...Block Diagrams 8 10 Samsung Electronics 8 9 Camera Main CCD ...
Page 102: ...PCB Diagrams 9 2 Samsung Electronics 9 1 Main Component Side ...
Page 103: ...PCB Diagrams Samsung Electronics 9 3 Conductor Side ...
Page 104: ...PCB Diagrams 9 4 Samsung Electronics 9 2 Rear Component Side Conductor Side ...
Page 105: ...PCB Diagrams Samsung Electronics 9 5 9 4 Terminal 9 3 Front ...
Page 107: ...PCB Diagrams Samsung Electronics 9 7 Component Side Conductor Side 9 7 CCD ...
Page 108: ...PCB Diagrams 9 8 Samsung Electronics MEMO ...
Page 109: ...PCB Diagrams Samsung Electronics 9 9 9 1 MAIN 2 COMPONENT PATTERN ...
Page 110: ...PCB Diagrams 9 10 Samsung Electronics 9 1 MAIN 2 CONDUCTOR PATTERN ...
Page 111: ...PCB Diagrams Samsung Electronics 9 11 Component Side Conductor Side 9 7 CCD pattern ...
Page 112: ...Samsung Electronics 10 1 10 Wiring Diagram ...
Page 113: ...Wiring Diagram 10 2 Samsung Electronics MEMO ...
Page 116: ...Schematic Diagrams Samsung Electronics 11 3 11 1 DC DC Converter ...
Page 117: ...Schematic Diagrams 11 4 Samsung Electronics T T T T T T 1 2 3 4 5 6 11 2 System Control Servo ...
Page 118: ...1 2 3 4 5 6 7 8 11 3 Video Schematic Diagrams Samsung Electronics 11 5 ...
Page 119: ...Schematic Diagrams 11 6 Samsung Electronics 11 4 Audio Mono ...
Page 120: ...Schematic Diagrams Samsung Electronics 11 7 11 5 Rear ...
Page 121: ...Schematic Diagrams 11 8 Samsung Electronics 11 6 Terminal ...
Page 122: ...Schematic Diagrams Samsung Electronics 11 9 11 7 Camera Main 3 2 1 6 7 4 5 ...
Page 123: ...Schematic Diagrams 11 10 Samsung Electronics 11 8 CCD 1 2 3 4 5 6 7 8 ...
Page 124: ...Schematic Diagrams Samsung Electronics 11 11 11 9 EVF SC A20 ...
Page 125: ...Schematic Diagrams 11 12 Samsung Electronics 11 10 CVF SC A23 A25 ...
Page 126: ...Schematic Diagrams Samsung Electronics 11 13 11 11 Adaptor ...
Page 127: ...Schematic Diagrams 11 14 Samsung Electronics 11 12 Front ...
Page 132: ...Schematic Diagrams Samsung Electronics 11 19 11 7 Camera Main 11 9 Page BLUE ...
Page 133: ...Schematic Diagrams 11 20 Samsung Electronics 11 9 CCD 11 12 Page RED CCD OUT ...
Page 134: ...Schematic Diagrams Samsung Electronics 11 21 11 9 CCD 11 12 Page BLUE ...