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 HÕD 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 LOW
T HEIGHT
TOO HIGH
GUIDE ROLLER S
GUIDE ROLLER T
Summary of Contents for SV-627X
Page 12: ...2 8 Samsung Electronics Alignment and Adjustment MEMO ...
Page 22: ...Exploded View and Parts List 3 10 Samsung Electronics MEMO ...
Page 35: ...Schematic Diagrams Samsung Electronics 5 3 5 1 S M P S 230 Voltage HI FI MONO ...
Page 36: ...Schematic Diagrams 5 4 Samsung Electronics 5 2 S M P S Free Voltage HI FI MONO ...
Page 37: ...Schematic Diagrams Samsung Electronics 5 5 5 3 Power Drive ...
Page 39: ...Schematic Diagrams Samsung Electronics 5 7 5 5 Audio Video ...
Page 40: ...Schematic Diagrams 5 8 Samsung Electronics 5 6 Hi Fi ...
Page 42: ...Schematic Diagrams 5 10 Samsung Electronics 5 8 SECAM ...
Page 44: ...Schematic Diagrams 5 12 Samsung Electronics 5 10 Input Output ...
Page 45: ...Schematic Diagrams Samsung Electronics 5 13 5 11 OSD VPS PDC ...
Page 46: ...Schematic Diagrams 5 14 Samsung Electronics 5 12 OSD Without VPS PDC ...
Page 47: ...Schematic Diagrams Samsung Electronics 5 15 5 13 Function Timer VFD AV Link V F D VFD AV LINK ...
Page 48: ...Schematic Diagrams 5 16 Samsung Electronics 5 14 Function Timer LED LED MODULE LED SINGLE ...
Page 50: ...Schematic Diagrams 5 18 Samsung Electronics 5 16 Remote Control Multi TV ...
Page 51: ...Schematic Diagrams Samsung Electronics 5 19 5 17 Remote Control VCR Only ...
Page 52: ...Schematic Diagrams 5 20 Samsung Electronics MEMO ...
Page 77: ...2 6 Samsung Electronics Alignment and Adjustment MEMO ...
