ST-5235 Yoke-Flyback Tester manual (Hard to read schematics).pdf

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Model ST-5235
YOKE/FLYBACK TESTER
595-2278-01
Copyright
©
1979
HEATH COMPANY
BENTON HARBOR, MICHIGAN
49022
Heath Company
All Rights Reserved
Printed In the United States of America
Page 2
TABLE OF CONTENTS
INTRODUCTION . .
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3
SPECIFICATIONS
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4
OPERATION
AND APPLICATIONS ........
.
.
.
.
6
IN CASE
OF
DIFFICULTY
General ..
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...
.......
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13
Troubleshooting Charts
.............
.
..
..
.
.... 15
CIRCUIT
DESCRIPTION
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.
. . . . . ..
"]
8
CALIBRATION
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................
... 21
APPENDIX
Parts
List.
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24
Circuit
Board X-Ray
View
..
....
.
............. (Illustration
Booklet
,
Page 6)
Schematic Diagram
..
..
.
.
................
Fo[d-in
CUSTOMER SERVICE
.
.
....
.
... Inside rear
cover
WARRANTY .
.
......
.
..
"
.
.
.
. .
. Inside front
coveF
ct
w
Q;
PICTORIAL 4
Page 3
Page 4
SPECIFICATIONS
RING TEST MODE
Coils Tested ..........
.
....
....
.
....
...... .
Horizontal and vertical windings of yokes, flyback
transformers, horizontal linearity and efficiency
coils, and general midfrequency
(10
KHz to
100
KHz)
coils.
Applies an exciting pulse to coil under test and de­
tects number of rings which are of preset amplitude or
higher.
Setat
25%
of initial ring. Adjustable from
10%
to
50%.
Bad reading for less than 9 rings.
Good reading for more than
11
rings.
Plus or minus
1
ring at the
10
(mid-scale) point, with
Ring Selector switch in its optimum position.
Test Method ..................
..
...
.
......
.
Preset Ring Amplitude
.
.
..
..
.......
.
.
.....
.
.
Ring Scale
................................ .
Accuracy .............
.
...........
.
....... .
VOLTS
p.p
MODE
Variable Tested
Voltage Scales ..........
...
..
...
...
..
..... .
Accuracy .......
.
.........
.
.
.
.............
.
Input Impedance
Drive voltage levels in deflection circuitry.
o
to
30
V P-P and
0
to
300
V P-P.
Plus or minus
5%
of full scale, from
100
Hz to
200.
Approximately
1
MO in parallel with
75
pF; AC
coupled.
Page 5
,
;
:
~~
..
------------------------------------------------------------­
CRT high DC voltages.
Optional Heath High Voltage Probe (Model IMA­
100-10) is required for high voltage measurement.
HIGH VOLTAGE DC MODE
Variable Tested .........
.
.................
.
Method ..........................
.
........ .
Voltage Scales ......
.
..................... .
Accuracy
o
to
10 kV and 0 to 40 kV.
Plus or minus 3% of full scale (including probe).
GENERAL
Power Requirements
..
....
.
.
.
..............
.
Either 120 volts AC, 60 Hz or 240 volts AC, 50 Hz. 5
watts.
Operating Temperature Range ......
.
.......
.
Storage Temperature Range .............
.
.. .
Meter ..
.
......
.
.......
..
....
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.
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..' .
.
..... .
Dimensions (overall) ...............
.
.......
.
o
to
50°C (32 to 122°F)
4-1/2" scale, 200
/-tA
moving coil movement.
5-3/4" wide x 6-7/8" high
x
10-3/4" deep
(14.6
x
17.4
x
27.3 cm).
6 pounds (2.72 kg).
Net Weight
...............................
.

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