Problem

 

Tests

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Probable Solution

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Retrace

1.

Turn down M. Gain to minimum.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Measure voltage, auto bias IC

927

 

 

 

If any of the voltages are

Lines .

 

 

 

 

 

pins 2, 4, & 6 for 5.5V to 6.5V.

 

not in the listed voltage

 

 

 

 

 

 

 

 

 

 

 

 

 

Also measure voltage, pins 3, 5,

 

range, replace IC

 

 

 

 

 

 

 

 

.

 

 

 

 

 

 

 

 

 

 

 

 

 

927

 

 

 

 

 

 

 

 

 

 

 

 

 

 

& 7 for 1.1V to 2.7V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2.

Measure voltage, LM324

 

 

 

 

 

 

 

 

 

 

 

 

If old style C-Film (no solder

 

 

920

 

 

 

 

 

 

 

 

connection) & pin 5 voltage is 4.8V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

pin 5. Should be less than 4.5V.

add a 7.15K resistor pins 8 to 11.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Otherwise replace C-Film.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3.

Check video gain line (J

 

 

 

)

 

 

 

 

 

 

If either V. or H. blanking is

 

 

 

 

 

 

 

 

 

 

 

 

215

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

scope sync on Vs

 

, .2mS/cm,

missing, go to that circuit for

 

 

215

 

 

and verify V. & H. blanking.

 

 

 

 

 

 

 

 

further tests.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Problem

 

Tests

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Probable Solution

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.

If screen turns bright & shutdown.

Check voltage across cap.

 

 

5-10V

Monitor

846

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Shuts

2.

If shutdown right after power up.

Check V+, Hfo, & EHT at power up.

Down.

3.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Disable fault; clip

 

 

 

to GND.

If solution, check fault circuit.

019

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4.

Disable shutdown; clip V- to

 

 

.

 

 

Measure EHT, should be less than 27KV.

 

 

109

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Problem

 

Tests

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Probable Solution

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.

With power applied, check voltage

If 0V to 100V, ohm out fuse

 

&

No

146

 

ground to (V-) anode of diode

 

 

 

 

 

.

 

 

inrush current limiter

 

 

 

 

25Ω

 

to .5Ω .

 

156

 

 

159

 

 

 

Power.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2.

Measure voltage, V+ line is 0V &

Ohm out crowbar zener diode

 

 

 

 

 

.

 

181

 

 

PS chirps

 

 

 

 

 

 

 

 

 

 

 

 

Also ohm out H. output Xsr

 

 

 

 

 

 

 

 

.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

433

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3.

If fuse is blown.

 

 

 

 

 

 

 

 

 

 

 

 

If the zener is shorted and the fuse

 

 

 

 

 

 

 

 

 

 

 

 

 

is blown, replace fuse

146

 

,

 

 

 

 

 

 

 

 

 

 

 

 

 

Ohm out 160V crowbar zener

 

 

181

.

zener

181

, power FET

136

,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

and the C5184 IC

 

 

 

 

.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

115

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4.

If the power supply chirps and

Ohm out the 17V line; V- to anode

 

 

high voltage can be heard.

 

 

 

 

 

 

 

 

of

141

,

141

,

149

,

139

 

,

 

132

 

 

,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

J-Film pins 8-14 & IC

 

115

 

 

pin 15.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5.

If the power supply chirps, check

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

for shorted secondary voltages by;

First, ohm out diodes;

 

 

 

 

 

 

 

 

 

,

 

 

 

 

 

 

 

 

 

,

 

 

 

 

142

 

 

168

 

 

 

 

Disconnect power to chassis.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

,

 

 

 

 

 

 

 

 

 

.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

169

 

 

181

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Apply external DC PS to 16V

 

 

 

 

 

 

 

 

If PS current less than .5A and 12V

 

 

line at cathode of diode

 

 

.

 

 

 

 

 

 

 

 

line=11.5V to 12.5V, go to next test.

 

 

 

169

 

 

 

 

 

 

 

 

 

 

Apply second DC voltage to 24V

If PS current less than .3A, line OK.

 

 

line at cathode of

 

 

 

.

 

 

 

 

 

 

 

 

 

 

 

 

Check base of H. output

 

433

 

 

 

for

 

 

168

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

drive waveform. If OK connect 24V

 

 

FBT Check at low voltage;

 

 

 

 

 

 

 

 

line to V+ line and check flyback

 

 

 

 

 

 

 

 

 

 

waveform at collector of

 

 

 

 

 

 

 

.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

433

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(Without H. deflection load,

 

PS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

chirps) If large and small pulses

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

observed, replace the FBT.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

97

Page 80 Page 82
Page 81
Image 81
Genius 2093, ISO XFR-75W, 1493, 2793, 3693, 1793, 1993, ISO XFR-100W manual Retrace
Page 80 Page 82

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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