3-1
UP-895/(E)
[Equipment Required]
.
Oscilloscope
.
Digital voltmeter
.
10 steps signal generator
Tektronix 1410 or equivalents (For NTSC signal)
Tektronix 1411 or equivalents (For PAL signal)
3-1. AGC Adjustment
Section 3
Electrical Alignment
Machine condition for adjustment
.
Input signal: 10 steps signal
.
No monitor is connected.
.
Set rear panel DIP switch
9
to up.
(AGC-ON)
Procedure
1. Input a 10 steps signal and set DIP
switch
!=
to DOWN. Adjust RV3 (AGC
REF) so that Vs is 700 mV.
2. Set DIP switch
!=
to UP and adjust RV2
(AGC GAIN) so that Vs is 630 mV.
Specification
TP5 (AMP IN)/MA-99 (C-3) Output waveform
.
Adjust so that Vs is 700 mV when AGC is ON
and 75
Z
terminator is on.
.
Adjust so that Vs is 630 mV when AGC is ON
and 75
Z
terminator is off.
Vs
Adjustments
AGC REF adjustment
1
RV3/MA-99 (C-2)
AGC GAIN adjustment
1
RV2/MA-99 (C-2)
1
RV3
1
RV2
TP5
MA-99
3-2. Video Level Adjustment
Machine condition for adjustment
.
Input signal: 10 steps signal
.
In case, monitor is not connected, set DIP
switch
!=
on the rear panel to ON, if
connected, set to OFF.
.
Adjust RV4 (AGC OFF CONT) using 10
steps signal input.
Specification
TP5 (AMP IN)/MA-99 (C-3) Output waveform
Adjust so that video signal level is 1.0 V.
Adjustments
AGC OFF CONT
adjustment
1
RV4/MA-99 (C-2)
1.0 V
MA-99
TP5
1
RV4
Summary of Contents for UP-895
Page 1: ...VIDEO GRAPHIC PRINTER UP 895 UP 895CE UP 895MD SERVICE MANUAL 1st Edition ...
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Page 71: ...10 1 UP 895 E 10 1 2 3 4 5 1 A B C D E F G H Section 10 Schematic Diagrams and Board Layouts ...
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