Genius 1493, ISO XFR-75W, 2093, 2793, 3693, 1793, 1993 manual Horizontal Deflection Circuit Description

Page 66

HORIZONTAL DEFLECTION CIRCUIT DESCRIPTION.

 

 

 

 

 

 

 

+24V to 27V Supply

2.2K.5W

1N4007

 

12-18VDC Hs

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

341

+

100uF

 

2SC4159E

33Vpp 27,E7

 

 

 

 

 

 

 

 

 

 

 

 

342

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

338

 

 

 

 

 

 

 

+12V Supply

 

 

3.92K

5.4-6VDC

 

 

3.92K

+24V

 

200Ω

2W

 

 

 

 

 

 

 

 

 

 

11, E5

 

 

 

 

 

 

 

 

337

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

340

 

GND

 

 

 

 

 

 

 

418

 

12

11

417

 

 

 

 

 

 

 

Remote

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+ comp.

 

 

 

 

 

 

 

 

 

 

 

 

Control

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PCB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Horizontal

 

1N4007

 

 

Horizontal

PICTURE

DELAYED

 

 

 

 

 

 

MULTIPLIER

 

 

 

POSITION

SYNC O/S

 

 

 

SAW TOOTH

 

Position

 

333

 

SYNC INPUT

 

O/S

 

 

 

TR . GENERATOR

BIAS

 

 

 

20K

RC7

 

0Ω

2

2.7K

8 1

 

2

 

3

 

 

 

4

 

5

 

6

 

 

 

484

RC4

 

202

 

I4

7

 

7.3-8.7V

Hs

7.3-8.7V

Vs

 

-.2VDC

Hs

3-4VDC

Hs

2.4-3.4VDC

 

 

 

 

4Vpp 02,D6

4Vpp

03,D6

1.5Vpp 04,E6

1.4Vpp 05,E6

0Vpp

06,E6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NEG.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

56pF

 

 

 

 

12K

Hs

 

 

 

 

 

11

 

 

 

 

+

 

 

 

 

 

1.8K

 

I2

 

 

 

 

 

 

6.8K

 

 

1uF

 

 

3

 

IA

 

 

 

 

 

 

 

 

10K

 

7.3VDC

Hs

 

 

9

 

 

 

 

I13

 

 

347

 

 

 

 

I1

 

 

 

 

 

 

 

 

 

 

 

 

 

352

 

 

22K

8.8K

 

 

25K

330pF

 

 

 

 

 

18

I7

5.5Vpp 01,D6

 

 

 

 

 

45K

 

 

 

 

 

 

 

17

 

 

I3

I12

 

351

I5

350

 

 

 

348

 

+

1uF

 

 

 

 

 

 

 

 

I6

 

 

 

 

 

 

 

 

GND

 

6,10

GND

1

 

 

 

 

344

 

 

 

 

 

 

 

 

 

 

 

 

Horizontal

 

220uF

 

 

1,000pF-15KHz

0VDC

Hs

 

I PRA

6,800pF-15KHz

 

 

 

Sync

 

 

 

 

3,300pF-31KHz

 

 

 

 

 

 

 

 

330pF-31KHz

56Vpp 62,D6

 

 

 

 

 

 

 

 

416

3,300pF-38KHz

 

 

 

 

 

 

 

334

 

 

330pF-38KHz

 

 

 

 

 

 

 

 

The functions of the horizontal control circuits are:

1.To provide the horizontal output circuit with a stable frequency with or without incoming horizontal sync.

2.To be able to adjust the picture position, horizontally, with respect to the raster.

3.To operate stability through periods of missing horizontal sync pulses.

4.To keep the picture from drifting within the operating temperature range.

All of these functions except for the picture position adjustment are accomplished by the phase locked loop. Delaying the horizontal sync with an adjustable timer produces the picture position adjustment.

The horizontal sync input circuit (pin 1) will trigger the picture position one-shot (O/S) on either the rising edge, or the falling edge, of the horizontal sync pulse. To accomplish the edge triggering, the sync pulse is differentiated by capacitor 352 into two short pulses, one for the rising edge and one for the falling edge of the

sync pulse. Which edge is the trigger depends on the bias voltage at pin 1. For positive edge triggering, the bias voltage is set to 7.8 volts by

resistors

 

I2

and

I3

. For negative edge

triggering, the

bias voltage is set to 4.1V by

connecting

 

 

 

via the solder connection IA .

 

I12

The picture position O/S clamps timing capacitor

351to 8.2 volts until horizontal sync triggers this O/S. The voltage on the timing capacitor drops at a rate set by the horizontal position control 484 and resistor

I4 . When the voltage, at pin 2, drops below 4 volts the delayed sync O/S is triggered and capacitor 351 is reset to its clamped voltage. The delayed sync O/S functions the same as the picture position O/S with the exception that it is not adjustable.

The flyback pulse, connected to pin 4 through

resistor I6 , starts the negative slope of the saw

tooth generator. When the sawtooth wave, which is

produced by a current to capacitor 348 , drops to 3

volts, the sawtooth generator switches back to the positive slope part of the wave till the next FBP.

During the active part of the delayed sync pulse, the multiplier gates current to capacitor 346 which is dependent on the sawtooth voltage at the delayed sync pulse time. Capacitor 347 sets the "0" voltage for the multiplier which is the average value of the sawtooth waveform.

If the delayed sync pulse occurs when the sawtooth is at a low voltage part of its cycle, capacitor 346 discharges and the oscillator frequency lowers. If the delayed sync pulse occurs at the top part of the sawtooth wave no current flows to capacitor 346 . This action, phase locks the horizontal oscillator to the incoming sync pulses.

82

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Contents N U a L R V I C E Year Limited Warranty About this Manual Table of Contents Iii Monitor Simplified Block Diagram Installation Instructions For The XX93 Monitors Instructions d´installation des écrans Installationsanweisungen für die XX93 Monitore Ceronix XX93 Monitor Electrical Specification High input voltage 20V Low input voltage 30V 80V Ceronix 189 in2 1,224 cm2 Page Page Page Page Control Description Circuit XX93 Monitor Block Diagram CRT C D E F G H I J Ceronix Model 1493-VGA, 1493-SVGA CPT1536 Ceronix KLM RED FIL RAY Note Produktsicherheit Anmerkung Ceronix XX93 Monitor Part List MM7 LL6 II7 FF9 FF3 BB6 DD8 DD9 HH2 Jumper, Normal Vertical OO6 15KHz, FBT Hitachi BW02651 PP4 RR0 VV2 RR7 CRT T U Video Interface CIRCUIT, FUNCTION, Description + & Analog CRT TC12 Controls XRC5346A + H. Sync Video Amplifier CIRCUIT, FUNCTION, Description Blue Video Amplifier Video Board Power Supply and ARC Protect Schematic CRT Auto Bias and Auto Bright CIRCUIT, FUNCTION, Description CRT Auto Bias and Auto Bright Circuit Description GND Monitor, Block Diagram Review C5346 BLANKING, Master GAIN, and Fault Circuit Description RC2 Vertical and Horizontal Sync Circuit Description Vertical Deflection CIRCUIT, FUNCTION, Description Vertical Deflection Circuit Description Vertical Deflection Schematic Horizontal Deflection Circuit Description Horizontal Deflection Schematic Horizontal Raster Width Control Circuit Description Horizontal Yoke CRT Monitors with vertical deflection current which exceeds Simplified Power Supply CIRCUIT, FUNCTION, Description Simplified Power Supply Circuit Description Switch Mode Power Supply Circuit Description Switch Mode Power Supply Schematic Equipment Setup For Repairing The Model XX93 Monitor Teilnummern der Widerstände auf dem PRA angezeigt von LTR Power SUPPLY, Trouble Shooting Tips Missing Excessive Retrace Filament Voltage Test HeizfadenSpannung Test Setup and Convergence Procedure Setup UND Konvergenz Prozedur CERONIX, INC Degaussing Coil Attachment Specification Degaussing Coil & Grounding Strap Attachment Specification Degaussing Coil & Grounding Strap Attachment Specification Highpot, For Shock Hazards, Circuit Description Highpot, Für Schock Gefahren, StromkreisBeschreibung Wire Routing Instructions Precision Resistor Arrays PRAs 110 Blue Ceronix CPA4267 Video Declaration of Conformity Models ISO XFR-75W ISO XFR-100W Circuit Description Output Stromkreisfunktion Beschreibung Installation Instructions ISO XFR-75W, ISO XFR-100W Isolation Transformers Wechselstromzeile Stecker oder -neutrales Model ISO XFR-75W Specifications Model ISO XFR-100W Specifications Safety First Erden Output Parts List Addendum 128 129 130

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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