Genius 1993, ISO XFR-75W, 2093, 1493, 2793, 3693 Video Board Power Supply and ARC Protect Schematic

Page 54

VIDEO BOARD POWER SUPPLY AND ARC PROTECT SCHEMATIC.

+127fV

 

 

 

 

 

 

 

 

 

 

Caution!

2 pin degaussing coil plug (CC1 &

CC1

 

 

+120V

 

 

 

 

 

 

 

 

FDH

CC2) must be plugged in such that the pin

From MAIN PCB

 

 

 

 

 

 

 

 

with the extra wire is closest to the fuse.

 

CC2

 

 

 

FDH

FDH

FDH

FDH

FDH

400

 

 

 

 

959

 

UNPLUG WHEN REPAIRING MONITOR.

 

 

971

 

400

 

 

 

 

 

400

400

 

400

400

886

 

 

 

 

 

 

 

 

 

 

 

 

CC3

 

 

 

835

899

 

845

849

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RED

 

1/2W

 

 

 

 

 

 

 

 

 

 

Coil

 

 

 

 

 

 

 

 

 

 

 

 

 

 

G1

G2

Focus

 

 

 

 

 

 

 

 

 

 

 

900

 

8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Degaussing

From Video Amp.

 

 

 

 

GREEN

 

1/2W

 

6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

851

 

11

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BLUE

 

1/2W

 

12

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

883

 

 

10

9

5

 

7 150

1

970

 

 

 

 

 

 

 

 

 

 

 

SOCKET

150

 

0

1K

 

1/2W

Green

EHT

 

 

 

 

 

 

 

 

 

 

 

1/2W

 

1/2W

 

 

 

 

 

 

 

 

 

 

 

 

 

877

 

 

880

Wire

 

 

 

 

 

 

 

 

 

 

 

 

882

 

896

855

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2.2K

961

 

EHT

Grid Pulse

 

 

 

 

 

10K 1/2W

 

 

 

 

 

 

 

 

1/2W

 

 

FOCUS

 

 

 

 

 

330pF

 

 

 

 

 

 

881

 

 

 

 

 

-23 to -27Vdc Vs

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

873

 

 

 

 

 

 

 

 

 

 

 

 

SCREEN

 

100K

1.87K

10Vp-p 95uS

 

 

871

 

 

 

 

 

 

 

 

 

 

 

 

 

 

854

 

853

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

100K

 

 

 

 

876

 

874

 

 

 

 

 

 

 

 

 

 

 

2.2nF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1/2W

 

Socket Board

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GND

 

 

 

-16V to-25V

0VDC

Hs

 

 

 

 

 

 

878

856

 

PCB 800

100uF

 

 

 

DAG GND

 

 

 

DAG GND

 

 

 

 

 

56V

31uS

 

 

 

 

 

 

 

 

50V

 

 

FDH400

 

 

 

 

 

 

 

 

FIL.

 

 

 

 

FIL.

TC 11

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

872

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

868

 

 

870

 

 

1N4005

1uF

 

 

 

 

 

 

 

 

Fil. GND

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FIL.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TC 12

 

 

 

 

 

 

 

 

848

+

50V

 

 

 

 

 

 

 

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+127fV

 

 

 

 

 

857

 

 

 

846

 

 

 

30

 

 

962

+127V

TC 8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Power supply voltages shown, are

1N4937

 

 

 

 

859

 

 

 

 

 

 

 

 

 

 

 

 

+16V

 

+16V

for the 2793-CGA monitor.

 

 

847

 

 

 

 

 

 

 

 

 

 

TC 1

 

 

 

 

 

 

 

 

 

 

 

 

+ 200V

 

 

 

 

 

 

150

 

 

 

 

 

 

 

 

 

 

 

 

 

18

 

.1uF

.1uF

 

 

 

+120V

 

 

 

 

+120V Source

 

 

 

1/2W cc

+12V

TC 4

+12V

 

 

 

 

 

 

 

 

 

 

 

860

879

801

816

 

875

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GND

 

GND

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TC 2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Auto Bright Control Output.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The high voltage in the CRT, through an arc, can

 

 

G1 is connected to a negative voltage to increase the

be conducted to any tube socket connection on the

 

cutoff voltage which reduces the dot size and produces a

video board.

To reduce the danger of these arcs

 

 

sharper picture.

This negative voltage is generated by

causing component failure, a number of arc current

 

rectifying the negative peaks of the filament flyback

paths are provided. The tube socket has integral

 

pulse with diode

870

, filter capacitor

868 , and resistor

spark gaps which conduct arc current to the tube

 

 

872 .

Resistor

872 is used to adjust the negative G1

ground (aquadag). through dissipation resistor 882 .

 

voltage for different FBTs.

Resistor

876 provides a

The clamping voltage of the spark gaps to the

 

 

fixed load to stabilize the -G1 voltage.

The grid pulse is

cathodes and G1 is about 1.5KV.

 

 

 

 

 

developed across load resistor 874 by a PNP transistor.

The peak arc current to the video amplifier

 

 

 

The 120 volt line, which is also generated by the

outputs is limited by resistors

900 ,

851

, &

883 .

 

filament voltage, is used to supply the video amplifier

Each amplifier output is connected to two clamp

 

 

output bias current.

Capacitor 857 translates the GND

diodes

835 ,

899

,

845 ,

849 ,

886 , &

859

to

 

 

referenced filament flyback pulse to the 127 volt line.

provide a current return to ground via the power

 

 

Rectifier diodes

847

&

848

and filter capacitor

846

supply filter capacitors

175 &

860 .

The grid pulse

 

generate the V+ minus 7 volt supply.

Capacitor

857 is

drive to G1 is protected by a low pass filter made up

 

also used to adjust this voltage for different FBTs.

of elements

855

,

871

, &

873 . Resistors

881

,

 

 

 

 

 

 

 

 

 

 

 

856and capacitor 878 also form a low pass filter for the G2 to auto bright control output connection.

A dissipation resistor 880 is connected to the focus spark gap to match the impedance of the aquadag connection. This reduces reflections and helps dissipate the arc energy. Resistor 879 supplies an additional ground path for arc energy.

The filament voltage is adjusted by capacitor 854 and diode (or resistor) 853 .

Resistor 859 and capacitor 860 decouples the video amplifiers from the 127 volt line. This filter is needed, in some models, to eliminate video amplifier distortion caused by ripple current on the V+ line. This ripple current is caused by the, V+ minus 7 volt line, power supply.

70

Image 54
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.