Atari Sanyo 14" Manual

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TM-157
1st printing
Sanyo 14" Color TV Monitor
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Operation, Maintenance
and Service Manual
Complete with Illustrated Parts List
JI\.
ATARI®
Cl AWarner Commun1ca1tons Company

Sanyo 14" Color TV Monitor
Operation, Maintenance
and Service Manual
Published by:
ATARI INC
1265 Borregas Avenue
P. 0 . Box 427
Sunnyvale, California 94086
Complete with Parts Lists
Monitor manufactured by Sanyo Electric
Co., Ltd.
Color TV Receiver Manufacturing Division
Gifu, Japan
Copyright © 1980 by Atari, Inc. All rights reserved.
No part of this publication may be reproduced by any mechanical, photo-
graphic, or electronic process, or
in the form of a phonographic recording, nor
may
it be stored in a retrieval system, transmitted, or otherwise copied for
public or private use, without permission from the publisher.
Lithographed in the U. S.A. 7J
A Warner Communications Company Cl

Sanyo Color Monitor
Table of Contents
1 Warnings and Cautions
A. Before You Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
B. Safety Measures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
C. Picture-Tube Handling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
D. Replacing with Proper Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
E. Final Testing Before Reinstalling Monitor . . . . . . . . . . . . . . . . . . . . . . . . 2
2 Specifications
A. Power Input and Consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
B. Temperatures and Humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
C. Currents and Voltages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
D. CRT Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
E. Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
F. Pattern Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3 Adjustable Controls
A. Brightness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
B. Horizontal Hold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . 5
C. Vertical Hold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
D. Vertical Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
E. Horizontal Width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
F. Focus ..................................................... 5
4 Supply Voltages and Test Points
Fortext see page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5 Signal Test Points
A. Red, Green, Blue Signals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
B. Horizontal and Vertical Sync . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
6 Troubleshooting
For blockdiagram of Sanyo monitorsee page . . . . . . . . . . . . . . . . . . . . . 7
7 Repair
A. PictureTube Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
B. Yoke Replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
C. FlybackTransformer Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
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Sanyo Color Monitor
8 Adjustments
A. Purity Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1. Preliminary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2. Red Purity Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3. Green Purity Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4. Blue Purity Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5. Final Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
B. Convergence Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1. Static Convergence (Center Area) . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2. Dynamic Convergence (Outer Area) . . . . . . . . . . . . . . . . . . . . . . . . . 11
9 Schematic and Illustrated Parts Lists
For drawings see page . . . . . . . . . . . . . . ... . . . . . . . . . . . . . . . . . . . . . . . 12
List of Illustrations
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Overview of Sanyo 14" Color TV Monitor . . . . . . . . . . . . . . . . . . . . . . 1
Adjustable Controls on Main PCB and Control PCB . . . . . . . . . . . . . 4
Adjustable Controls on Neck PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Block Diagram of Sanyo Monitor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Schematic Diagram of Sanyo Monitor ......................... 10
Main PCB Assembly ....................................... 12
Neck PCB Assembly ...................................... 13
Parts List of Sanyo Monitor ................................. 14
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Sanyo Color Monitor
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If reading through this manual does not lead to solving a certain
maintenance problem, call Tele-Help™ at the Atari Customer Service office
in your geographical area, as shown in one of the two maps below. Order all
parts from the California office.
WEST and CENTRAL U.S.A.
Parts for all Atari Customers. Sales and Service
Atari Coin-Op Customer Service
1344 Bordeaux Drive, Sunnyvale, CA 94086
Telex 17-1103
(Monday -Friday, 7:30 -4:00 pm Pacific Time)
From California, Alaska or Hawaii
(
408) 745-2900
From anywhere else in this area
toll-free [phone]
EAST U.S.A.
Sales and Service Only
Atari Inc.
New Jersey Customer Service Office
Cottontail Lane, Somerset, NJ 08873
Telex 37-9347
(Monday -Friday, 7:30 -4:00 pm Eastern time)
From New Jersey
s [phone]
11: From anywhere else in this area
toll-free [phone]

Sanyo Color Monitor
1 Warnings and Cautions
A. Before You Start ...
You should never attempt to work on an exposed
monitorchassis if you are not familiar with servicing
procedures and precautions necessary for high-
voltage equipment. Any TV monitor has three
sources of possible danger: strong electric shock
due to high voltages or unisolated AC line voltages,
X-ray radiation, and implosion. Therefore, please
read this chapter carefully.
B. Safety Measures
Develop good safety habits, so when you're
rushed with repair work, you'll still automatically
take precautions.
A good practice when working on any TV monitor
is to first ground the chassis and use only one hand
when testing circuitry. This will avoid the possibility
of carelessly putting one hand on the chassis or
ground, and the other on an electrical connection.
Doing so could cause a severe electrical shock.
If you service this color monitor on a test bench,
you must isolate the monitor from AC line voltage!
An isolation transformer is mandatory for your own
safety. The Sanyo monitordoes not contain an isola-
tion transformer on its chassis. It is mounted in-
stead on the game power supply. (It may appear like
a regular power transformer, but is really also an
isolation transformer.)
C. Picture· Tube
Handling
Use extreme care when handling the picture tube,
since rough handling may cause it to implode, due
to a vacuum inside. Do not nick or scratch the glass,
or subject it to any undue pressure when removing
or installing it.
Wear safety goggles and heavy gloves for protec-
tion when handling the picture tube. Keep others
without safety goggles away. Do not lift the tube by
the neck.
Figure 1 Overview of Sanyo 14" Color TV Monitor
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Sanyo Color Monitor
Discharge the high voltage in the picture tube by
shorting the anode connection to chassis
ground-
not the cabinet or other mounting parts. When
discharging, go from ground to anode, and use a
well-insulated piece of wire.
D. Replacing with
Proper
Components
It is important to maintain the specified values
and failure characteristics of all components in the
horizontal and high-voltage circuits, and anywhere
else in the monitor that could cause a rise in high
voltage, or in operating supply voltages.
Refer to the parts lists in the back of this manual,
and use only exact replacement parts, especially for
the picture tube, semiconductors, transformers,
coils, and fuses.
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If you replace the picture tube with another type
not specified in the parts list, then avoid prolonged
exposure at close range to the unshielded areas of
the tube. You may endanger yourself from un-
necessary exposure to X-ray radiation.
E. Final Testing Before
Reinstalling Monitor
Before installing the color monitor back in the
game, you must check the following:
1. Inspect all harness wiring on the monitorand be
sure none of it is pinched between the chassis
and other metal parts in the monitor.
2. Replace all protective devices such as insula-
ting fishpaper, compartment covers and
shields.

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Sanyo Color Monitor
2 Specifications
A. Power Input and
Consumption
Line Voltage
Line Frequency
PowerConsumption
A.C. 100V ± 10%
50/60 Hertz
46 Watts
B. Temperatures and
Humidity
Environmental Temp.
Environmental
Humidity
Temp. Inside Game Cabinet
5-35° C (41-95° F)
20-95%
45° C max. (112°
F)
C. Currents and
Voltages
The CRT anode average current is less than 650 uA.
High voltage is
24 ± 1.5 KV.
B+ 1
B+ 2
B+ 3(regulated)
B+ 4(regulated)
HeaterVoltage
105 ± 1.0 v
19.5 ± 2.0 v
12 ± 1.0 v
175 ± 5.0 v
6.4 ± 0.2 V(RMS)
D. CRT Specifications
Convergence Tolerance-
max. 0.2% of raster width, center of screen
max. 0.5%
of raster width, corners of screen
Purity-Color purity should be practically uniform
all over screen after being degaussed with hand-
held degaussing coil
Pull-In Range, Horizontal 15.75 KHz ±
200 Hz
Pull-In Range, Vertical More than 8 Hz
Type
of CRT #370ECB22, 14-lnch, 90°
Tilt
of Deflection Yoke declination is within 2 mm
E. Connectors
6-Pin Connector for Video Signals:
Pin 1 =Red Pin 2 =Green
Pin 4 =Ground
3-Pin Connector for Power:
Pin 3
=Blue
Pin 5=Sync
Pin 1=100 VAC Pin 2=100 VAC
F. Pattern Size
You should be able to reproduce the following sLz;es
of patterns:
Maximum size
Minimum size CRT
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Sanyo Color Monitor
3 Adjustable Controls
A. Brightness
Remember to observe the precautions regarding
high voltages when you make any adjustments on
this monitor!
Note that before you adjust the brightness, the
monitor should have been turned on for at least 5
minutes. Keep the game in the attract or play mode.
Find the small white knob underneath the screen,
located at the far right on the Control Printed-Circuit
Board or PCB (see Figure 2). Turn this brightness or
screen voltage control until you achieve a pleasing
level of brightness.
Too high a brightness causes the retrace lines to
show. Too low a brightness causes the entire screen
to become dark and obscured.
HORIZONTAL VERTICAL VERTICAL
HOLD HOLD HEIGHT
B + ADJUSTMENT
(For Technicians Only)
MAIN PCB
However, if you cannot achieve the proper
brightness by using this white adjustment knob,
then you should check the master brightness level
adjustment. This potentiometer is located almost
dead center on the Main PCB, at VR201.
To reset the brightness level, disconnect the 6-pin
video-signal connector from the monitor. Turn the
white brightness control to maximum or fully clock-
wise. Connect a DC voltmeter's plus lead to TP452,
and its minus lead to TP451-near the center of the
Main PCB.
Set the voltmeter to the 1.5-3 V range. Now adjust
the small VR201 potentiometer to 0.5 volts. Recon-
nect the 6-pin connector on the monitor.
BRIGHTNESS
LEVEL
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TP451 TP452
0 0
HORIZONTAL
WIDTH ADJUST·
MENT COIL
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Figure 2 Adjustable Controls on Main PCB and Control PCB
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