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1-6-1
HG240EA
ELECTRICAL ADJUSTMENT INSTRUCTIONS
General Note: "CBA" is an abbreviation for
"Circuit Board Assembly."
NOTE:
1.Electrical adjustments are required after replacing
circuit components and certain mechanical parts.
It is important to do these adjustments only after
all repairs and replacements have been com-
pleted. Also, do not attempt these adjustments
unless the proper equipment is available.
2.To perform these alignment / confirmation proce-
dures, make sure that the tracking control is set in
the center position: Press either "
L5??
" or "
K
" button
on the remote control unit first, then the "PLAY"
button (Front Panel only).
Test Equipment Required
1.Oscilloscope: Dual-trace with 10:1 probe,
V-Range: 0.001~50V/Div.,
F-Range: DC~AC-20MHz
2.Alignment Tape (FL6A)
Head Switching Position Adjustment
Purpose:
To determine the Head Switching position during
playback.
Symptom of Misadjustment:
May cause Head Switching noise or vertical jitter
in the picture.
Reference Notes:
Playback the Alignment tape and adjust VR501 so that
the V-sync front edge of the CH1 video output wave-
form is at the 6.5H
±
1H(412.7
µ
s
±
63.5
µ
s) delayed posi-
tion from the rising edge of the CH2 head switching
pulse waveform.
Test point
Adj.Point
Mode
Input
J23(V-OUT)
TP502(RF-SW)
GND
VR501
(Switching Point)
(MAIN CBA)
PLAY
(SP)
-----
Tape
Measurement
Equipment
Spec.
FL6A
Oscilloscope
6.5H
±
1H
(412.7
µ
s
±
63.5
µ
s)
Connections of Measurement Equipment
Figure 1
Oscilloscope
Main CBA
J23
CH1 CH2
Trig. (+)
GND
TP502
EXT. Syncronize Trigger Point
1.0H
CH1
CH2
Switching Pulse
6.5H+/-1H (412.7
µ
s+/-63.5
µ
s)
V-Sync
0.5H
Summary of Contents for LUX214VR
Page 23: ...1 8 3 1 8 4 HG410SCM1 Main 1 6 Schematic Diagram...
Page 24: ...Main 2 6 Sensor Schematic Diagrams 1 8 5 1 8 6 HG410SCM2...
Page 25: ...Main 3 6 Schematic Diagram 1 8 7 1 8 8 HG410SCM3...
Page 26: ...Main 4 6 Jack Sub Jack Schematic Diagrams 1 8 9 1 8 10 HG410SCM4...
Page 28: ...1 8 13 1 8 14 HG410SCM6 Main 6 6 Schematic Diagram...
Page 29: ...1 8 15 1 8 16 HG410SCAFV AFV Schematic Diagram...
Page 32: ...1 8 21 1 8 22 Jack CBA Top View Jack CBA Bottom View BHG470F01014C...
Page 39: ...1 13 1 HG410FEX EXPLODED VIEWS Front Panel A1X...
Page 75: ...LUX214VR HG410ED 2004 06 03...