Genius 1793, ISO XFR-75W, 2093, 1493, 2793, 3693, 1993, ISO XFR-100W manual Blue Video Amplifier

Page 53
940 .

 

 

VIDEO AMPLIFIER SCHEMATIC.

 

 

 

 

127V

 

 

 

 

.1uF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

957

 

 

Blue Video Amplifier 937

18

3

 

 

 

 

 

 

 

 

16V

 

 

 

 

 

 

 

 

120V

 

 

 

 

 

 

 

 

 

 

 

560

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MPS2907

 

75

13

 

2

+12V

10

 

 

12.1K

K17

 

 

950

 

K13

 

 

 

1.49K

 

 

K15

17

 

 

 

 

301

 

 

 

 

 

 

 

 

 

18

14

 

 

 

K9

40.2K

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

K14

 

 

 

K2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

140

 

 

2SA

 

15

.1uF

 

 

 

 

 

 

 

 

K16

 

 

 

 

MMBT

 

 

K19

 

 

 

1370

 

250V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

16

 

 

 

 

 

887

 

 

3904

 

 

 

 

 

 

 

 

951

 

 

 

 

 

 

 

 

 

 

 

 

 

7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

19

 

 

9.25V

BLUE

 

K34

 

 

 

 

 

 

 

 

 

 

 

 

1

10

 

 

 

.015uF

 

 

 

 

VIDEO

 

 

7

 

10

180

 

 

 

 

 

3

 

 

885

 

 

 

 

 

TO

 

 

 

 

 

 

 

 

Dark screen

 

 

 

SOT

 

 

 

 

 

20

K18

 

CRT.

 

 

 

 

 

 

 

 

 

 

80-110VDC

 

606

1.0K

NE592

 

 

3

 

 

 

 

1nF

 

 

 

 

K7

 

 

 

 

 

 

 

 

 

 

K8

K32

 

 

 

150

 

 

205

 

 

PART

 

 

Jumper

8

 

 

 

 

956

 

 

 

12

 

 

 

 

2SC

 

OF

 

 

 

14

 

 

 

 

.5W

 

953

FDH400

 

 

 

 

 

 

 

K3

 

3467

AUTO

 

 

K33

 

5

 

 

 

 

 

 

 

 

 

.1uF

 

 

4

 

 

 

 

 

 

BIAS

 

 

 

 

 

 

 

 

943

958

 

 

 

1N4148

 

 

 

MPS2907

 

 

 

 

 

 

 

 

 

 

 

 

 

1.8K

 

 

 

 

 

 

 

 

 

 

7

2SA

 

100

K36

3pF

 

934

 

33

8

 

6

15

955

Beam

 

 

 

 

 

 

 

1370

K21

 

 

 

 

 

K20

 

 

 

K4

 

 

 

Current

1

681

A

 

5.62K

 

 

945

9

11

 

 

 

1.8K

Feedback

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

K6

 

 

K11

 

 

954 948

FROM

 

1N4148

21K

836

2.2K

3.32K

1.62K

 

BIAS CONTROL LINE

CA3224

K1

K35

K22

K10

5 9 12

K5

K12

 

GND

 

 

 

 

GND

 

 

+12V

 

 

 

 

 

 

 

+12V

 

 

 

 

 

 

1.8K

9.25V

 

 

 

 

 

 

 

MPS A64

 

VIDEO INTERFACE

 

 

 

 

938

 

 

VERTICAL and

 

D 942

 

 

 

 

 

 

 

 

MG

 

HORIZONTAL

 

 

 

 

 

 

3.92K

.1uF

 

 

 

BLANKING,

 

 

 

 

 

Master Gain, &

 

940

930

 

 

 

 

Beam limiter

 

 

GND

 

 

 

 

 

 

 

 

 

 

R

G

 

 

B

 

 

 

 

 

 

 

 

 

 

 

 

VIDEO SOURCE (external)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The bias current of the push-pull output

 

stage is set by resistors

 

 

,

 

,

 

,

 

K14

K15

K16

 

 

 

, and diode connected

 

 

transistor

 

 

 

 

.

 

 

K17

 

 

950

 

Transistor

 

 

 

is thermally connected

to

 

 

950

 

transistor

 

 

 

 

to maintain the same base to

 

 

951

 

emitter voltage drop. Note that resistor K17 adds 11mA to the diode connected transistor

950. This current is available to drive the base of transistor 951 during periods of high frequency amplification. This high base current is needed because, the beta of transistor 951 is low for high current pulses and when high frequency is amplified many high current pulses occur. The mechanism for transferring the current from

transistor 950 to the base of transistor 951 is the coupling capacitor 885 which charges through resistor K16 on the positive part of the signal and discharges through the base of transistor 951 on the negative part of the drive signal. Therefore the output stage, bias current, is frequency dependent and has a range of 3mA to 15mA.

Resistor K13 and capacitor 887 , which are connected to the 9.25 volt line, decouples the video amplifier current pulses from the 127V line. The 9.25 volt line is connected to the emitter of the NPN push-pull transistor by resistor K4 . This voltage establishes the output voltage of the NE592 in the middle of it's ±2 volt drive range. The 9.25 volt line is regulated by darlington transistor 942 with voltage divider resistors 938 &

69

Image 53
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.