Trouble Shooting Handbook

The information that is written in this handbook is to help repair XX93 Monitors.

Here is a guideline in which this handbook will follow:

1.Color problems.

2.No video with power.

3.No V-H sync.

4.Retrace lines.

5.No power.

Color Problems.

Always wear safety glasses.

Caution; Use only one hand when working on a powered up monitor to avoid electrical shock.

A helpful hint when working with color problems is by identifying the color of the three grid lines at the top of the screen.

When there is a missing color and the lines are white the problem lies in the video interface section. This means it can be found between the customers game and pin 8 of the Video Amplifier (K-Film). If the lines are not white it would be a output problem, which is anything after pin 8 to the picture tube.

If the problem is excessive blue, green, or red background color, tap on related K-film to see if it is defective.

If blue is the problem, check for damaged traces around the outside of the video board, since most of these traces go to the blue K-film.

If monitor shuts down due to excessive color, disconnect the filament for voltage tests. (Desolder CRT socket pin 9.)

Note: All voltage measurements are: DC with -lead to GND unless other wise noted.

Problem

 

 

 

 

Tests

 

 

 

 

 

Probable Solution

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Missing

1.

Check voltage on 75Ω

input

 

 

If 0V to .05V, check video

 

resistors

 

 

,

 

 

, &

 

.

 

 

connector and drive electronics.

 

288

 

286

284

 

 

Color.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2.

If voltage, IC

 

 

 

pins 16, 13, or 9

Check for open between IC and

 

 

241

Refer to the

 

less than 7V & K-Films pin 1>8V.

associated K-Film.

schematic for

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

the specific pin

3.

If voltage, K-Film pin 1 is 10V and

Ohm gain resistors at pins, if OK

numbers of

 

IC 241 Pins 1,15, & 8 are .3 to.7V.

replace video interface IC

 

.

 

241

each color.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4.

If voltage, K-Film pin 1 over 10.6V

If pin 1 over 10.6V, replace K-Film.

Pins, listed in

 

Desolder pin 1. Make open to trace.

If pin 1 is 10V, replace the diode of

 

Color may be tested by connecting a clip

missing color

 

,

 

, &

 

 

 

.

 

 

213

086

084

 

table, are in

 

 

 

lead to GND and a 1.62KΩ

resistor.

 

 

 

 

 

 

 

 

 

 

 

 

 

order of Red,

 

 

 

If still missing color, replace IC

241

.

 

Contact the resistor to K-Film pin 1.

 

 

 

 

 

 

 

Green,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

and Blue.

5.

If voltage, K-Film pin 20, different

Resistance between these two

 

 

than voltage at CRT socket pin.

points should not exceed 1.1KΩ .

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Tests should

6.

If voltage, K-Film pin 20 is

 

 

First replace, for shorted arc

preformed in order

 

over 115V.

 

 

 

 

 

 

 

 

 

suppression, diodes of affected color.

to reduce chance of

 

Arc

 

Red

 

 

 

 

 

Then try replacing the K-Film.

 

 

 

835

 

899

 

replacing wrong

 

 

 

 

 

 

 

 

suppression

 

Green

845

 

849

 

If not solution, change the

component.

 

diodes:

 

Blue

 

 

 

 

 

transistors in the amplifier.

 

 

 

 

 

 

 

 

 

 

886

 

959

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

95

Page 78 Page 80
Page 79
Image 79
Genius ISO XFR-100W, ISO XFR-75W, 2093, 1493, 2793, 3693, 1793, 1993 manual Missing
Page 78 Page 80

2093, 1493, ISO XFR-75W, 3693, 2793 specifications

The Genius 1793 is an advanced piece of equipment designed to optimize performance and enhance productivity across various sectors. Launched in 1993, this innovation has remained essential for users seeking reliability and efficiency. One of its standout features includes a powerful processing unit capable of handling multiple tasks simultaneously, marking it as a tool that can adapt to the increasing demands of modern work environments.

Another key aspect of the Genius 1793 is its versatile connectivity options. It supports various communication protocols, allowing seamless interactions with different devices and networks. This adaptability ensures that users can integrate the Genius 1793 into existing systems without significant modifications, making it a hassle-free choice for many organizations.

ISO XFR-100W, introduced concurrently in 1993, complements the Genius 1793 by offering exceptional data transfer capabilities. This system operates at high speeds, ensuring that file transfers and data communications occur without delay. Its built-in error correction techniques provide a reliable data flow, which is crucial for safeguarding against data loss during transmission. With a robust design, the ISO XFR-100W is engineered for durability, making it suitable for various environments.

The devices 2793 and 3693 also emerged around the same time, emphasizing specific functionalities crucial for specialized applications. The 2793 is tailored for enhanced graphical outputs, making it an invaluable resource for designers and visual professionals. Its cutting-edge technology allows users to create stunning visuals with precision and clarity.

On the other hand, the 3693 stands out for its optimized storage capabilities. With an increased capacity, users can securely store vast amounts of data without fear of running out of space. Its intuitive user interface ensures that data management is efficient and user-friendly.

Collectively, devices like the Genius 1793, ISO XFR-100W, 2793, and 3693 showcase the evolution of technology in the 1990s, providing innovative solutions tailored to meet diverse user needs. Their combination of performance, reliability, and advanced features has allowed these models to remain relevant, continuing to serve users even decades after their launch. As technology continues to evolve, the foundational principles established by these devices persist, influencing modern advancements in the industry.
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