Genius 1793, ISO XFR-75W, 2093 Blanking, Master Gain, Beam Limiter, And Fault Circuits Schematic

BLANKING, MASTER GAIN, BEAM LIMITER, AND FAULT CIRCUITS SCHEMATIC.

Remote control PCB

MASTER

+12V

VIDEO GAIN LINE

1K

RC2

GAIN

1K

4-7VDC Vs

062

485

GND

4-9Vpp 61,B4

+12V

VERTICAL

BLANKING

6.8K

6.8K

(BIAS ACTIVE)

6

250

0

Ω

251

MPS2907

From auto bias IC pin 13

8

2-3VDC

Vs

7

1/2

1N4148

211

2

2.3-

4Vpp 63,C4

LM393

2.7V

+ 5

253

1

1/2

212

210

LM393

3

1.8K

4-7VDC

Hs

+

(VERTICAL BIAS O/S)

1.8K

1K

4

368

4-9Vpp 61,B4

From LA7851 pin 16

208

248

4.5-5.3V Vs

1.8K

.047uF

5Vpp 16,E5

252

GND

207

HORIZONTAL BLANKING

PN2222

270Ω

(FLYBACK PULSE)

From FBT pin 8

078

081

093

0VDC

Hs

072

56Vpp 62,D6

0Ω

1N4937

077

GND

080

GAIN SELECT RESISTORS

12

M GAIN

C5346

241

S

T

U

1.62K

2.7K

VIDEO INTERFACE IC

+12V

1.62K

604Ω

1.21K

076

064

260

244

245

FBT

1.21K

8

258

GND

453

BEAM CURRENT

EHT 4

+12V

Return

LIMITER CIRCUIT.

+6V

1K

+

10uF

28.0K

12.1K

PN2222

012

MPSA64

014

020

62K

034

009

LIMIT

D

BEAM CURRENT

1N4148

011

+3.4V

.1uF

036

071

018

15.8K

010

037

7-10VDC

GND

75Ω

1K

61, C2

T CPR0432

FAULT

100uF

066

065

+

GND

180

035

CIRCUIT

3

0Ω

Temperature

22K

1/4

1

019

Power supply

Sensor

LM324

2

033

017

2SA1371

controller IC

Excessive beam current or

GND

C5184

Ω

OVP 14

high temperature comparator.

0

200K

115

Shutdown

109

005

008

77