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Equipment required: Digital Voltmeter; Oscilloscope; Frequency Counter; Test Pattern Generator; RP3 or Pattern Disc.
STE
FUNCTION
1.
D.C. 24V
Connector ' A ' .
Adjustment.
Connector ' A ' .
2.
D.C. 12V
Adjustment.
D.C. 5V
Connector ' A ' .
3.
Adjustment.
4.
V. Size Adjustment.
RP3 or Pattern Disk.
5.
Linearity
RP3 or Pattern Disk.
Adjustment.
6.
H. Hold Adjustment.
Free run no input.
7.
Sub. Brightness
RP3 or Pattern Disk.
Adjustment.
8.
Strobe Timing
RP3. Select Printer
Adjustment.
Test.
COM ONENT LOCATIONS
IC702
□
VR7O1
STROBE
TIMING
PRINTER PCB
VR5O2
+ 12V
ALIGNMENT CHART FOR THE MONITOR
ALIGNMENT INSTRUCTIONS
SIGNAL IN
SIGNAL OUT
D.V.M.
D.V.M.
D.V.M.
Monitor Screen.
Monitor Screen.
Pin 5/CP401.
Monitor Screen.
Monitor Screen.
VR5O1
+ 5V
VR405
D
V.SIZE
MONITOR PCB
METHOD
Check if 24V ± 1V.
Adjust VR502 to read 12V ±0.01 V. Set VR401 to max.
Adjust VR501 to read 5V ±0.05V. Set VR401 to max.
Adjust VR405 for full size. I = K = 10 ±2mm.
Adjust DY to get Up/Down space from the centre of
the screen in the test pattern. A-B < 3mm, J-K < 3mm,
L-J,C 3mm.
Adjust VR404 to reed frequency 1 5625kHz.
Set Brightness, Contrast controls to min. position.
Adjust VR402 for dim pattern.
Turn Pot. VR701 clockwise & anticlockwise till
strobe timing " OK " command appears on the screen.
IC7O8
t------- 1
CD1O1
REMARKS
Disconnect CP101 to
perform the test.
Replace after tests.
Ref. Fig. 2-1.
Disconnect CP101 to
perform the test.
Replace after tests.
Ref. Fig. 2-1.
Disconnect CP101 to
perform the test.
Replace after tests.
Ref. Fig. 2-1.
Adjust Brightness control
as required.
Ref. Fig 2-2.
Adjust Brightness control
as required.
Ref. Fig 2-2.
Try till satisfied.
Strobe timing should
not be too long
or too short.
----------------------
; ------------------- 7 7
A
I
'
V
\
H
H
H
t >
H
H
-
7
K
3
I
Fig. 2-2
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