Ceronix 1493 Service Manual

Text of Ceronix 1493 User Guide:

• Ceronix 1493, AC line User supplied Isolation Transformer V- GND +52V to +127V + + LOAD H Dy & EHT VIDEO 142 SECONDARIES 136 166 137 V REF. Error Amp. Comp. OSC. ENABLE DRIVER 115 C5184 (-200V) FET V- FLYBACK DIODE GND Res. + V+ SIMPLIFIED POWER SUPPLY CIRCUIT, FUNCTION, DESCRIPTION. The switching regulator includes the power FET 136 which passes current from V- to GND through the inductor 166 . During the time the FET is on, the current in the inductor is increasing and the inductor is storing energy. As can be seen from the wa

• LA7851 Vertical Oscillator Vertical Sync LA7838 One Shot Clamp 5V Current Source 401 1uF Retrace Booster 385 Vertical Yolk + 390393 392 391 388 Linearity Fine Tuning Vertical 403 375 6V +23V to +27V Vertical Size Ramp Control Circuit 46 7 12 13 9 2 +6V 449 SIMPLIFIED VERTICAL DEFLECTION CIRCUIT Current Feedback Voltage Feedback Drive Output VERTICAL DEFLECTION CIRCUIT, FUNCTION

• ABCDEFGHI J 2 3 4 5 6 7 ABCDEFGHI J 1 2 3 4 5 6 7 1 9 282 285 287 290 291 294 300 301 302 305 307 308 310 311 312 313 315 317 321 309 319 303 320 227 237 238 224 220 234 263 262 240 272 070 074 075 077 219 221 007 016 039 003 103 105 025 024 199 119 198 027 028 205 247 256 354 360 366 399 255 259 387 452 171A 442 443 439 518 436 147 381 448 451 201 101 407 182 225

• Ceronix 1493, BLANKING, MASTER GAIN, AND FAULT CIRCUIT DESCRIPTION. 76 Horizontal blanking ( ) is added to the gain line by transistors 072 . This transistor pulls down on the gain line when the flyback pulse is high. Capacitor 081 is charged by diode 080 and resistor 093 such that, as soon as the flyback pulse starts going positive the NPN transistor 072 turns on and horizontal blanking starts. The time constant of capacitor 081 and resistors 078 and 093 is chosen such that the capacitor will lead the FBP on the downward slope and turn the horizontal blanking transistor off just at the end of the FBP. This advanced timing compensates for the tur

• 111 Precision Resistor Arrays (PRAs). P/N CPR0511Video Amplifier Resistor Array "BLUE Film" BLUE B C E 1234 13 14 15 16 17 18 19 20 12 34567 10 11 12 13 14 8 9 NPN E NE592 OutputB NPN 9.25V LINE GND VIDEO INPUT AUTO BIAS 127V LINE PNP E CAP. PNP B DIODE PNP B PNP E PNP C AMP Output K2 1.29K K7 K6 K3A K21 K1 100Ω K4 15Ω K12 K20 K5 K8 K10 K9 K11 K

• Ceronix 1493, The aging of the picture tube (CRT) not only affects the balance of the cathode cutoff voltage, which is corrected by the auto bias circuit, but it also affects the gain of the CRT. The Auto Bright circuit actively corrects for CRT gain changes by sensing any common bias voltage change, from the auto bias circuit, and adjusts the screen voltage to hold the average bias voltage constant. The lower adjustment on the flyback transformer which is the screen voltage, is used to set the auto bright voltage to the center of its range. Therefore, the auto bright circuits sets up a se

• Ceronix 1493, TABLE OF CONTENTS About This Manual............................................................................................................. Table of Contents................................................................................................................ CERONIX Monitor Simplified Block Diagram................................................................. Installation Instructions; English, French, and German................................................ CERONIX Monitor Electrical Specification...................................................................... 1493, 1793, 1993, 2093, 2793, and

• Ceronix 1493, 110 Precision Resistor Arrays (PRAs). P/N CPR0510 Video Amplifier Resistor Array "K Film" K B C E 1234 13 14 15 16 17 18 19 20 12 34567 10 11 12 13 14 8 9 NPN E NE592 OutputB NPN 9.25V LINE GND VIDEO INPUT AUTO BIAS 127V LINE PNP E CAP. PNP B DIODE PNP B PNP E PNP C AMP Output K2 1.62K K7 K6 K3A K21 K1 100Ω K4 15Ω K12 K20 K5 K8 K10 K9 K11 K19 K22 K18 12.1K K16 K17 K15 18Ω K13 678 10115912 A GND GND 120V LINE K3B 150Ω 150Ω 606Ω 689Ω A - Increases Output Voltage by 10V K 301Ω 33Ω 2.2K 3.32K 75Ω K14 1.2K 21K 820Ω 5.62K 1

• 910111213 Retrace Booster GND Boost Drive Vert. Out Thermal Protection LA7838 Vertical Deflection 377 603 601 607 4.7Ω 610 3.3Ω 608 4.7Ω 609 606 602 380 470uF 605 1.2Ω 604 611 FR205 TIP31A +24V + TIP31A TIP32A FR205 382 1N4007 8 +24V 605 604 607 606 609 608 610 611 E C B Vertical Amp. PCB PNP NPN NPN 601 602 603 612, LA7838 CPB1615 E C B E C B 135791113 PCB View; Foil Side. The output of t

• Ceronix 1493, SETUP AND CONVERGENCE PROCEDURE CAUTION: To avoid electrical shock, take care not to touch the yoke conductors or push against the anode cap. Use a knife to brake free the magnetic rings on the yoke, which are usually locked with red varnish. Bring the adjustment tabs on each pair of magnetic rings in line for the starting point. 1. Loosen the yoke clamp. Remove the yoke wedges and the tape from the CRT. 2. Connect a test generator to the video input. 3. Turn the monitor on. Switch the test generator to red field. Adjust the horizontal and vertical raster size, on the

• Ceronix 1493, ∆ Bd.# Part No. Bd. Sch. Ref. Description A B C D E F G H I J K L M N O P Q R S T U V W X Com. PRICE CERONIX XX93 Monitor Part List 62 A CPA4233, 1493-CGA B CPA4235, 1493-CGA C CPA4200, 1493-VGA D CPA4252, 1493-SVGA E CPA4243, 1793-VGA H CPA4250, 1793-SVGA G CPA4247, 1793-SVGA I CPA4221, 1993-VGA J CPA4255, 1993-VGA K CPA4249, 1993-SVGA L CPA4256, 1993-SVGA M CPA4112, 2093-CGA N CPA4166,

• Ceronix 1493, 7.5V BIAS LINE MASTER GAIN & BLANKING +12V 200Ω 3.6K 2 16 12 +ANALOG ENABLE RED VIDEO INPUT 2. POSITIVE GOING ANALOG MODE. MG 11 1 15.8K 15.8K 75.0Ω 75Ω C5346 RED channel shown 270Ω 15KHz 0Ω Saturated Color (.70V) Black Level (0V) VIDEO AMPS 7.5V BIAS LINE MASTER GAIN& BLANKING +12V 200 3.6K 2 3 16 12 RED VIDEO INPUT 1. NEGATIVE GOING ANALOG MODE. MG 236278 3.5V 271 C5346 RED channel shown -Analog Black Level (-A BL) 301Ω 340Ω Ω Saturated Color (1V) Black Level (5.6V) 6.3V VIDEO AMPS 2

• Ceronix 1493, Highpot, Für Schock Gefahren, StromkreisBeschreibung. Für die Modelle 1493,1793,1993,2093,2793, und 3693 videomonitoren. Maschine, in der der Monitor benutzt wird. Der MONITOR wird an den Einschließung Erden über das Signalkabel, Monitor Stütze Hardware und den schützende Erde Erdungsdraht angeschlossen. Der Chassiserden muß an die Masse Erdletung angeschlossen werden. Alle großen zugänglichen Metallteile werden an erden angeschlossen. ERDEN Wechselstromezeile Gebäudeverdrahtung PrimärZeile SICHERUNG Lokalisierung Transformator HIGHPOT Prüfvorrichtung Es ist die Verantwortung der Firma, die den Ceronix Monitor in dort system benutzt

• Ceronix 1493, The auto bias circuit performs all of its sensing and bias corrections during the sixteenth to the twenty first horizontal cycle, after the vertical sync pulse. Before the sixteenth cycle, the SW in the auto bias IC is open ( SW in "C" position). If the CRT cathode is too far into cutoff, less beam current flows at the grid pulse time. This causes the beam current buffer to output a smaller negative pulse and less voltage is stored in the coupling capacitor. The program pulse a

• Ceronix 1493, LM393 + 1/2 HORIZONTAL BLANKING 0VDC 56Vpp 62,D6 Hs 4.5-5.3V 5Vpp 16,E5 Vs 2-3VDC 4Vpp 63,C4 Vs +12V PN2222 .047uF 1 3 VERTICAL GND 368 1.8K 1N4937 078 080 093 270Ω 081 072 248 252 253 250 211 210 6.8K 251 6.8K 1.8K 207 208 1K 1.8K GND 1N4148 7 5 6 4 8 2 MPS2907 212 2.3- 2.7V 0Ω BLANKING 4-7VDC 4-9Vpp 61,B4 Hs 077 0Ω LM393 + 1/2 From auto bias IC pin 13 (BIAS ACTIVE) From LA7851 pin 16 (VERTICAL BIAS O/S) From FBT pin 8 (FLYBACK PULSE) BEAM CURRENT LIMITER CIRCUIT. 258 260 244 245 076 604Ω 1.21K 1.62K S TU 1.21K 064 +12V GAIN SELECT RESISTORS GND VIDEO INTERFACE IC C5346 M GAIN 2

• Ceronix 1493, 8 CERONIX XX93 Monitor Electrical Specification. 7. Picture tube 1493-CGA/VGA/SVGA 1793-SVGA InchInch mmmm 13.2 335 16.1 409 11.1 281 12.9 328 8.3 211 9.6 245 .0110" .28mm .0098" .25mm Useful area Useful horizontal Useful vertical Useful diagonal Spacing of dot/line trios 90°90° 57% 50% Deflection angle Light transmission Approximately Approximately 92.1 in 593 cm 124 in 804 cm 1993-VGA/SVGA Inch mm 18 457 14.4 366 10.8 274 .0102" .26mm 100° 45% Approximately 165 in 1,003 cm 2222 2 2 1793-VGA/SVGA Inch mm 16 407 12.9 328 9.7 246 .0106" .27mm 90° 53% Ap

• Ceronix 1493, HORIZONTAL DEFLECTION CIRCUIT DESCRIPTION. 3,300pF-38KHz 12 2.7K 1uF + -.2VDC 1.5Vpp 04,E6 Hs 7.3-8.7V 4Vpp 02,D6 Hs 7.3-8.7V 4Vpp 03,D6 Vs 3-4VDC 1.4Vpp 05,E6 Hs 2.4-3.4VDC 06,E6 0Vpp 1 64 52 3 GND 1 18 10K 1uF + 45K 8.8K22K 12K 0Ω 202 I2 I3 I12 I7 344 347 I6 GND 6,10 9 25K I5 350 351 2 7 8 6.8K I13 BIAS MULTIPLIER Horizontal SYNC INPUT POSITION O/S SYNC O/S SAW TOOTH GENERATORTR. PICTURE DELAYED I4 1N4007 333 11 330pF NEG. Hs 17 I PRA 416 484 20K Horizontal Position RC7 comp. + - 11 5.4-6VDC 11, E5 348 12-18VDC 33Vpp 27,E7 Hs 200Ω 2W 337 340 GND 342 1N4007 2SC4159E 2.2K.5W 341 +24V 338 100uF + 22

• Ceronix 1493, Vs2.2 to 2.7Vdc 4.2Vp-p 360uS Vs7.8 to 8.8Vdc 8.4Vp-p 95uS 68.1K C1 LM324 1/4 LM324 1/4 LM324 1/4 +12V Line 100K R G B 3.3K 909 Vs9 to 10Vdc 9.6Vp-p 95uS 2.7K 884 888 TC 10 1N4148 8 + AUTO BIAS CIRCUIT 11 13 9 10 12 14 15 7 6 5 4 16 17 18 19 1 2 320 21 22 GND Vcc Blue Blue GND CA3224E AUTO BIAS IC +10V .047uF .047uF .047uF .1uF .1uF .1uF 891 22K 926 925 924 923 922 921 907 .1uF 894 908 895 927 910 892 911 33K + + 10uF 10uF 10uF 33K 33K 2.5- 6.7V 2.5- 6.7V 2.5- 6.7V 4.6-5.2VDC 2- 3V .2- .6V 1.2- 2.5V 5.7- 6.3V 1.2- 2.5V 1.2- 2.5V 5.7- 6.3V 3.8- 4.2V 7 5 4 comp. input hold cap. comp. hold cap. comp. hold cap. sw.

• Ceronix 1493, 1.62K 604Ω 1.21K 1.21K BoRo Go GAINM+ ENA IN BG IN R IN R R R G A- BL 4-7VDC 5-9Vpp 61,B4 Vs U Blanking & Beam Current Limit R VC 4 RED INPUT VC 3 GND 0VDC 56V 28,D3 Hs 6 5.6V to 1.1V, NEGATIVE ANALOG, DC COUPLED, VIDEO INTERFACE CIRCUIT DESCRIPTION. SOCKET BOARD 127V TC8 Feedback V Sync CRT Auto Bright Beam current Feedback Beam current Feedback Beam current CRT Auto Bias Beam Current Buffer B+G+R=∑ Red Video Amp. Green Video Amp. Blue Video Amp. ABA TC 3 Blue TC5 Green TC7 Red TC 6TC 10 SOCKET BOARD CONNECTOR (TC) 206 800 ARC PROTECT 100uF 209 + 10 4 TTL BL B GND Controls XRC5346A R B 241 16 13 5 12396 11 0 VC 11.5V-12.5V VIDEO GAIN LINE GND +12V 293

• Ceronix 1493, CERONIX CHASSIS. The ISO XFR-75W/-100W MUST be grounded by mounting on a grounded, conductive surface via at least two screws. Connector: AC Line AC Line or neutral WARNING: Mains power and ground connections must be made before power is applied to the ISO XFR-75W or the ISO XFR-100W Isolation Transformers. Preferred orientation for optimum cooling. INSTALLATION of the ISO XFR-75W, ISO XFR-100W ISOLATION TRANSFORMERS. WARNING: FOR CONTINUED SAFETY, REPLACE SAFETY CRITICAL COMPONENTS ONLY WITH MANUFACTURER'S RECOMMENDED PARTS (REFER TO SERVICE LITERATURE). AVIS: POUR MAINTENIR LE DEGRE DE SECURITE

• Ceronix 1493, 0.325" 0.45" NOTE: When box is placed on a flat, the highest point shall not xceed 0.015". 0.200"DIA. Holes on a 0.375" grid. 20PL. 0.50" 0.35" 0.375" 0.933" 2.40" 0.45" 0.45" 0.55" 6.15" 5.75" 5.15" 5.150" 6.25" 0.250" 0.30" 0.250" 0.325" 0.43" 3.375" 0.190" X 0.375" DIA. HOLES 4 PL. 0.250" 6.75" 6.000" 7.25" 0.250" 2.575" ±0.020" 0.200"DIA. Holes on a 0.375" grid. 0.328" Dia.

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