Alignment and Adjustment
Samsung Electronics
2-3
2-2-2 Linearity adjustment
(Guide roller S, T adjustment)
1) Playback the Mono Scope alignment tape (SP mode).
2) Observe the video envelope signal on an oscillo-
scope (triggered by the video switching pulse).
3) Make sure the video envelope waveform (at its
minimum) meets the specification shown in
Fig. 2-6.
If it does not, adjust as follows :
Note :
a=Maximum output of the video RF envelope.
b=Minimum output of the video RF envelope at the
entrance side.
c=Minimum output of the video RF envelope at the
center point.
d=Maximum output of the video RF envelope at the
exit side.
4) If the section A in Fig. 2-7 does not meet the speci-
fication, adjust the guide roller S up or down.
5) If the section B in Fig. 2-7 does not meet the speci-
fication, adjust the guide roller T up or down.
Fig. 2-6 Envelope Waveform Adjustment
a
a b c d
c,b,d/a 63%
b
c
d
Fig. 2-7 Adjustment Points
A
B
A
B
H'D SWITCHING
PULSE
ENVELOPE
6) Play back the Mono Scope alignment tape (SP mode).
7) Connect an oscilloscope CH-1 to the Envelope and CH-2 to the H’D SW Pulse for triggering.
8) Turn the guide roller heads with a flat head ( ) driver to obtain a flat video RF envelope as shown in Fig. 2-8.
Fig. 2-8 Guide Roller S, T Height Adjustment
IDEAL ENVELOPE
S HEIGHT TOO HIGH
S HEIGHT TOO LOW
T HEIGHT TOO HIGH
T HEIGHT TOO LOW
GUIDE ROLLER S
GUIDE ROLLER T
Summary of Contents for SV-DVD3E
Page 7: ...Product Specifications 2 2 Samsung Electronics MEMO ...
Page 39: ...Troubleshooting 5 20 Samsung Electronics MEMO ...
Page 49: ...Exploded View and Parts List 6 10 Samsung Electronics MEMO ...
Page 60: ...Samsung Electronics 8 1 8 Block Diagram ...
Page 61: ...Block Diagram 8 2 Samsung Electronics MEMO ...
Page 63: ...PCB Diagrams 9 2 Samsung Electronics 9 1 VCR Main COMPONENT SIDE ...
Page 64: ...PCB Diagrams 9 3 Samsung Electronics CONDUCTOR SIDE ...
Page 65: ...PCB Diagrams 9 4 Samsung Electronics 9 2 DVD Main COMPONENT SIDE SOLDER SIDE ...
Page 66: ...PCB Diagrams 9 5 Samsung Electronics 9 3 Function Timer COMPONENT SIDE CONDUCTOR SIDE ...
Page 67: ...PCB Diagrams 9 6 Samsung Electronics MEMO ...
Page 70: ...Schematic Diagrams 10 3 Samsung Electronics 10 1 S M P S ...
Page 71: ...Schematic Diagrams 10 4 Samsung Electronics 10 2 Power Drive ...
Page 72: ...10 3 Function Timer Schematic Diagrams 10 5 Samsung Electronics ...
Page 73: ...Schematic Diagrams 10 6 Samsung Electronics 10 4 System Control Servo ...
Page 74: ...Schematic Diagrams 10 7 Samsung Electronics 10 5 A V ...
Page 75: ...Schematic Diagrams 10 8 Samsung Electronics 10 6 Hi Fi MTS ...
Page 76: ...Schematic Diagrams 10 9 Samsung Electronics 10 7 Input Output ...
Page 77: ...Schematic Diagrams 10 10 Samsung Electronics 10 8 A2 NICAM ...
Page 78: ...Schematic Diagrams 10 11 Samsung Electronics 10 9 OSD VPS PDC ...
Page 79: ...Schematic Diagrams 10 12 Samsung Electronics 10 10 SECAM ...
Page 80: ...Schematic Diagrams 10 13 Samsung Electronics 10 11 TM ...
Page 81: ...Schematic Diagrams 10 14 Samsung Electronics 10 12 DVD Main Micom AV Decoder ...
Page 82: ...Schematic Diagrams 10 15 Samsung Electronics 10 13 DVD Servo ...
Page 83: ...Schematic Diagrams 10 16 Samsung Electronics 10 14 DVD Audio Video ...