CRT AUTO BIAS AND AUTO BRIGHT SCHEMATIC.

 

100K,1/2W

 

FBT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

856

2.2nF, 1KV 2.2K

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

878

1/2W

10K

1K

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

881

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

873

855

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R

 

 

G1

G2

330pF

 

 

1,000pF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AUTO BRIGHT CIRCUIT

 

G

 

 

 

CRT

871

 

 

 

 

 

 

 

 

 

Adjust the bottom pot

 

B

 

 

 

 

 

 

 

956

 

 

 

10

 

 

 

 

 

 

 

 

 

 

 

FDH400

 

 

+

 

on the FBT for +4.2V 2SC3675

 

 

+12V

Beam current off on

 

 

 

 

 

 

 

 

 

1/4

 

8

 

100K

 

 

 

 

 

power down circuit.

 

 

 

 

958

 

1.8K

9

LM324

 

 

852

 

 

 

1N4005

68.1K

100uF

VIDEO

+

 

2SA1370

955

 

920

 

 

 

 

085

 

 

 

 

 

 

850

TC9

 

 

 

+ +16V

INTERFACE

Video

 

 

 

 

 

 

 

 

 

 

 

 

 

090

127K

089

 

Amp.

 

 

 

 

 

 

 

15.8K

3.3K

 

 

169K

 

 

 

 

 

 

 

 

 

 

 

 

On main

 

 

 

 

954

 

 

 

 

 

914

909

 

 

858

 

 

087

 

 

 

 

1.8K

 

 

 

 

 

 

 

board at DD1.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Blue BEAM CURRENT

948

 

Blue video BIAS control line.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+12V Line

For XX92

 

 

 

 

 

1N4005 X3

 

 

 

AUTO BIAS CIRCUIT

 

 

 

 

C

900

10

+10V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Green &

2.74K

 

 

 

 

 

903

905

906

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C17

 

 

 

 

 

 

 

 

 

 

 

Red BEAM

C7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CURRENT

 

 

11

5

 

920

 

3.8-

 

 

.1uF

 

AUTO BIAS IC

 

 

 

 

 

1.82K

 

+

4.2V

 

 

907

1

 

GND

 

Vcc

 

22

 

 

 

 

 

 

7

 

 

 

 

 

 

 

 

 

 

 

1/4

 

 

 

 

 

 

 

 

CA3224E

 

 

 

 

 

C4

 

6

LM324

 

 

 

 

 

 

 

 

 

 

 

 

 

4K

 

 

 

 

12

200

 

 

 

 

 

 

 

927

 

 

 

10uF

 

 

 

 

 

 

 

 

 

.1uF

 

2

 

 

 

 

21

 

 

 

 

 

 

 

 

C8

 

 

 

 

 

 

 

 

 

 

 

 

 

13

 

 

 

7

 

 

 

Blueinput

Blue

 

 

C10

 

 

 

5K

 

 

 

 

 

 

+

 

14

 

 

 

 

 

 

 

 

 

 

 

 

 

 

hold

 

 

 

 

 

 

 

 

 

 

 

68.1K

 

921

 

 

 

 

 

 

 

895

 

 

2,200pF

 

3

 

C9

 

 

 

 

 

 

sw.

cap.

 

 

 

 

941

 

 

 

 

C3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2.5-

 

 

 

 

+

 

 

 

 

.047uF

 

3

 

normal

 

 

20

33K

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

 

 

 

6.7V

 

 

 

 

 

1/4

 

 

 

 

 

1.2-

 

comp.

 

 

 

 

 

908

15

 

 

 

2

LM324

17

 

 

922

2.5V

 

sw. in grid pls. pos.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4K

 

 

 

 

 

 

200

 

 

.1uF

 

4

 

 

19

10uF

Green

 

 

 

 

 

 

 

C13

 

 

 

 

 

 

 

 

 

 

 

 

16

 

5K

 

5

 

 

 

Green input

Green

+

Video Amp.

 

C11

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5.7-

 

 

 

hold

 

 

 

 

 

 

 

 

 

 

 

68.1K

 

923

 

 

 

 

 

894

BIAS.

 

2,200pF

 

 

 

C12

 

 

6.3V

 

 

 

cap.

 

 

 

 

 

 

 

 

 

 

sw.

 

 

 

 

818

 

 

12

 

 

C2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

.047uF

 

 

 

 

 

 

 

2.5-

33K

 

 

 

+

 

 

 

 

 

5

 

 

 

 

 

18

 

 

 

 

 

 

14

 

 

 

 

 

 

 

 

 

6.7V

 

 

 

 

 

1/4

 

 

 

 

 

 

1.2-

 

comp.

 

 

 

 

 

910

 

 

 

 

 

LM324

 

 

 

 

924

 

 

 

 

 

 

 

18

 

 

 

13

20

 

 

 

2.5V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4K

 

 

 

 

 

 

200

 

 

.1uF

 

6

 

 

 

 

 

17

10uF

Red

 

 

 

 

 

 

 

C16

 

 

 

 

 

 

 

 

 

 

 

 

19

 

 

 

4

 

 

 

Red input

Red

 

+

 

C14

 

 

 

5K

 

 

 

 

 

 

Video Amp.

 

 

 

 

 

 

 

 

 

 

5.7-

 

 

 

hold

 

 

 

 

 

 

 

 

 

 

 

 

 

 

925

 

 

 

 

 

 

892

BIAS.

 

2,200pF

 

 

C15

 

68.1K

 

 

6.3V

 

 

 

cap.

 

 

 

 

 

 

 

 

 

 

sw.

 

 

 

 

815

 

 

 

 

C1

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

.047uF

 

 

 

 

 

 

 

2.5-

33K

TC 10

 

 

GND

 

 

 

7

 

 

 

 

 

16

 

 

 

 

 

 

 

 

 

 

 

 

 

6.7V

 

 

 

 

 

 

 

 

 

 

comp.

 

 

 

 

V. Osc. O/S

 

 

 

 

 

 

 

 

 

 

926

1.2-

 

 

 

 

 

 

911

 

 

 

 

V. osc o/s or Delayed V. osc o/s

 

 

2.5V

 

6V REF.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

V. Blanking

 

 

 

 

 

 

 

 

 

 

22K

 

8

 

CL

 

BIAS

 

15

 

 

Filament Pls.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

18

 

 

891

 

.2-

 

START

 

 

 

4.6-5.2VDC

Bias active

 

 

 

 

 

 

 

 

 

 

.6V

 

COUNTER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

9

 

FF

Q

 

 

14

 

ABA

Grid pulse

 

 

 

 

 

 

 

 

 

 

 

 

 

GND

 

5V REF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TC 6

Program pulse

 

 

 

 

 

 

 

 

 

 

 

2-

 

 

EN

 

 

 

To

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

21 H. LINE

 

 

Vertical

 

 

+12V

 

 

 

 

 

 

 

 

1N4148

10

 

AUTO

 

 

7.8 to 8.8Vdc Vs

 

 

 

 

 

 

2.7K

 

 

COUNTER

 

13 Blanking

 

 

 

 

Grid pulse

 

 

BIAS

 

8.4Vp-p 95uS

 

1.8K

 

 

 

884

 

 

 

 

 

CL

 

ACTIVE

 

2.2 to 2.7Vdc Vs

 

 

 

 

 

9 to 10Vdc Vs

 

888

 

 

 

DECODER

 

 

 

MPS2907

 

 

 

 

 

 

 

4.2Vp-p 360uS

 

 

933

9.6Vp-p

95uS

 

 

2,200pF

 

sw. control

 

 

 

 

 

To CRT Grid #1

 

 

 

 

 

 

 

 

 

889

 

11

GRID

PROGRAM 12

 

 

 

 

 

 

928

 

 

 

 

 

 

 

PULSE

PULSE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.8K

1.8K

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-15V to -27V

874

931

 

 

 

 

GND

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

73

Page 57
Image 57
Genius 2093, ISO XFR-75W, 1493, 2793, 3693, 1793, 1993, ISO XFR-100W manual Gnd

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.