VERTICAL DEFLECTION SCHEMATIC.

22-28V Vs

.8Vpp 24,F7

Thermal Protection

V.+12V Vertical Linearity Circuit

196

 

 

 

 

 

 

 

 

 

 

 

 

Vert.

 

 

DECREASES

 

 

 

 

Capacitor multiplier for the 2793.

Out

 

 

200K

 

 

200K

 

 

 

 

 

 

 

TOP AND

 

 

 

 

 

 

 

 

 

BOTTOM

412

MPS2907

413

 

2SC4159E

270

 

 

 

VERT. SIZE.

 

 

 

Boost

 

 

 

 

 

 

 

 

196

GND

 

 

I

 

 

 

409

 

 

197

30

11

12

13

 

 

 

 

 

 

D5

 

 

 

D5

 

 

 

 

 

 

1N4005

198

 

 

 

 

 

 

 

H

 

 

 

 

200K

 

200K

 

.1uF

 

+ 1,000uF

 

 

0

 

 

 

 

1N4005

 

371

 

372

INCREASES

399

 

199

382

 

395

 

 

 

GND

 

119

 

PN2222

 

PN2222

TOP AND

 

 

 

 

 

BOTTOM

 

 

 

 

 

 

 

 

 

 

VERT. SIZE.

 

 

 

 

 

 

 

 

411

 

 

373

2SC3467

 

 

1.5-2.7V Vs

 

 

 

 

 

 

 

 

 

4.7

 

 

 

 

 

 

 

 

 

 

 

 

 

VRAS. POS.

 

 

 

24Vpp 24,E4

 

 

See

 

 

See

 

 

 

 

396

1N4148

1N4148

 

 

 

 

 

 

Table

 

Table

0 TO 7 VDC

100

 

 

 

 

 

 

 

 

 

 

 

 

.1uF

406

407

405

 

404

420

 

 

 

 

 

1/2W

VERTICAL

 

 

397

 

 

 

 

 

 

394

YC1

 

 

 

 

 

 

 

 

426

YOKE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

12-16VDC Vs

 

 

 

 

 

 

 

1,000uF

390, 2W 50Vpp 28,F6

YC2

 

 

 

 

 

 

421

 

 

 

 

 

 

 

 

35V+

 

427

 

 

 

 

 

 

 

 

 

 

 

 

GND

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

449The output of the vertical drive, differential

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

22K

 

 

 

amplifier, is connected to the power amplifier

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

370

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

which drives the yoke. A booster circuit is

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

connected to the the power amplifier supply via

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4.5-5.3V

Vs

 

 

 

 

15.8K

 

 

 

capacitor

380

 

and clamp diode

382

such that

 

 

5Vpp

16,E5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

when the booster is active, during vertical

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

408

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

retrace, the power supply to the vertical output

16

 

 

 

 

 

 

15

 

 

 

 

 

14

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

amplifier is doubled. Resistor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

396

and capacitor

397

 

make up a high

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GND

 

 

 

V. Ref.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LA7851

 

 

 

frequency vertical output stabilization circuit.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The vertical output at pin 12 is connected to

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

In similar manner, the positive half of the

 

 

 

the vertical yoke. Resistor

421

 

is a load resistor

 

 

 

 

across the yoke which stabilizes the vertical

 

vertical current waveform is conducted by

 

 

 

 

 

 

 

deflection feedback loop. The yoke return is

 

transistor

 

373

diode

405

, and resistors

372

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

decoupled by capacitor

 

 

and the vertical

 

and

 

 

 

 

 

 

. Both transistors

 

 

and

 

 

 

may

449

 

 

 

 

 

404

 

373

411

 

 

 

 

 

 

current is sensed by resistor

 

 

 

 

 

 

. The vertical

 

be connected to pin 4 via solder connection

HH or

 

385

 

raster position is adjusted by injecting current in

 

they may be connected to inverting transistor

 

the vertical yoke return.

This is accomplished

 

 

409

 

 

and resistors

412

and

413

.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

by transistor

 

420

, with emitter resistor

394

,

 

The inverting transistor is connected with

 

 

 

 

 

 

 

 

and the V. RAS. POS. control

 

 

 

 

 

.

 

solder connection I and decreases the vertical

483

 

 

 

 

 

 

 

size at the top and bottom of the screen.

 

 

 

 

A capacitive multiplier circuit is connected in

 

 

 

 

The ramp capacitor

 

 

 

is connected to a

series with the 27 volt line, in the 27” monitor, to

 

 

 

 

401

 

reduce the ripple voltage due to beam current

 

differential amplifier at pin 6 and the negative

 

variations. Transistor

 

 

 

 

conducts current

 

 

197

 

 

 

feedback from the yoke return line is connected

 

 

 

 

from the 27 volt line to the LA7838 deflection

 

to pin 7. This negative feedback, which senses

 

supply input pin 8. Capacitor

 

 

 

 

 

 

and resistors

 

 

119

 

 

the DC component of the vertical output voltage,

 

 

 

 

 

and

 

 

 

 

form a low pass filter which is

 

 

196

 

198

 

 

is also the current feedback for the LA7838. It is

 

 

 

 

connected to the base of this transistor. Diode

 

made up of voltage divider resistors

 

 

 

and

 

388

 

 

 

conducts the inductive current from the

 

 

199

 

 

 

 

 

 

 

 

 

+

 

 

 

 

 

 

 

and a wave shaping integrator.

 

 

 

390

 

 

393

 

vertical yoke during the first part of retrace.

 

The wave shaping integrator, capacitor

 

 

 

and

 

391

A jumper at

 

 

 

replaces the capacitive

 

 

196

 

resistor

 

 

 

 

 

 

 

, is used as the primary vertical

 

 

392

multiplier circuit in the chassis with smaller

 

linearity adjustment.

 

 

 

 

 

 

 

CRTs.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

81

Page 65
Image 65
Genius 2093, ISO XFR-75W, 1493, 2793, 3693, 1793, 1993, ISO XFR-100W manual Vertical Deflection Schematic

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.