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Ceronix 1493 Service Manual

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Monitor Models:
1493
1793
1993
2093
2793
3693
Safety Isolating
Transformer Models:
ISO XFR-75W
ISO XFR-100W

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Summary of Contents for Ceronix 1493

  • Page 1: 1493-Cga Main Board Technician Assembly Drawing

    Monitor Models: 1493 1793 1993 2093 2793 3693 Safety Isolating Transformer Models: ISO XFR-75W ISO XFR-100W...

  • Page 2: 1493-Vga/Svga Main Board Schematic

    2 YEAR LIMITED WARRANTY This product is warranted by CERONIX to be free of defects in material and workmanship for a period of two years from the date of purchase. All parts and labor are free of charge during the warranty period.

  • Page 3: About This Manual

    ABOUT THIS MANUAL This manual is specifically written to aid the service technician, repairing CERONIX Models 1493, 1793, 1993, 2093, 2793, and 3693 color monitors. There are three main sections: 1. General Description. 2. Circuit Description. 3. Repair Setup and Appendix.

  • Page 4: Table Of Contents

    CERONIX Monitor Simplified Block Diagram..............Installation Instructions; English, French, and German..........CERONIX Monitor Electrical Specification..............1493, 1793, 1993, 2093, 2793, and 3693 General Operation Description. Video Interface, Amps & Beam Current Sense..Blocks A-D....... Auto Bias, Bias Sync Delay, & Auto Bright.....

  • Page 5: Table Of Contents

    Filament Voltage Test..(German)..................Setup and Convergence Procedure..(English)..............Setup and Convergence Procedure..(German)..............Replacement Parts, Purchase Order Form................ 1493 Degaussing Coil Attachment Specification............... 1793, 1993, 2093 Degaussing Coil Attachment Specification........... 2793, 3693 Degaussing Coil Attachment Specification............. HighPot, for Shock Hazards, Circuit Description..(English)..........

  • Page 6: Horizontal Deflection & Remote

    POWER SUPPLY Power This block diagram gives a broad view of the circuit organization of the 1493, 1793, 1993, 2093, 2793, and 3693 monitors. The blocks with the bold outline represent circuits which provide these monitors with a wide range of operating conditions without the need for adjustment.

  • Page 7: 1793-Svga Main Board Technician Assembly Drawing

    Installation Instructions For The XX93 Monitors. 1. A 3 amp slow blow fuse (for the degaussing current) and a 75 VA isolation transformer are the minimum requirements for using our monitor in a product. Unpack the monitor. Refer to the installation instructions supplied Install the monitor in the enclosure.

  • Page 8: 1993-Vga Main Board Schematic

    Instructions d´installation des écrans XX93. 1. Un fusible á fusion lente de 3 amp (pour le courant du champ magnétique d´adjustement) et un transformateur d´isolation de 75 VA sont le minimum requis pour utiliser nos écrans dans un produit. 2. Déballer l´écran. Se référer aux instructions d´installation foumies par le fabriquant 3.

  • Page 9: 1993-Vga Main Board Technician Assembly Drawing

    Installationsanweisungen für die XX93 Monitore. 1. Ein 3 Ampère-T sicherung (für die degaussing-Strömung) und ein 75 VA Isoliertransformator ist die Minimum-Forderung für benutzen unseren Monitoren in einem Produkt. Packen Sie den Monitor aus. Schließen Sie den Monitor Für Details, Folgen Sie den Installation-Anweisungen, im Gehause an.

  • Page 10: 1993-Svga Main Board Schematic

    CERONIX XX93 Monitor Electrical Specification. INPUTS Standard Video Configurations, available, are: Min. Typ. A. Positive Analog, DC Coupled. Black level 0.00V 0.02V 0.04V .75V Video .6mA To Amp. Video Saturated color 0.75V 0.77V 0.79V Video Source Black level 0.00V 0.02V 0.04V...

  • Page 11: 1993-Svga Main Board Technician Assembly Drawing

    60Hz 65Hz 65Hz 70Hz 75Hz 3. The Power to the monitor is to be supplied by a secondary winding of an isolation transformer. Model 1793 Model 1993 Model 1493 Min. Max. Min. Max. Min. Max. 120VAC 50Hz or 60Hz 90VAC...

  • Page 12: 2093-Cga Main Board Schematic

    CERONIX XX93 Monitor Electrical Specification. 4. Five Controls are located on Model 1793 Model 1993 Model 1493 a separate PCB for easy access. Min. Max. Min. Max. Min. Max. H SIZE--------------Horizontal raster size 10.1" 11.1" 11.9" 12.9" 13.4" 14.4" V SIZE---------------Vertical raster size 7.3"...

  • Page 13: 2093-Cga Main Board Technician Assembly Drawing

    CERONIX XX93 Monitor Electrical Specification. Picture tube 1793-VGA/SVGA 1793-SVGA 1993-VGA/SVGA 1493-CGA/VGA/SVGA Inch Inch Inch Inch Useful diagonal 13.2 16.1 11.1 12.9 12.9 14.4 Useful horizontal Useful vertical 10.8 Useful area 92.1 in 593 cm 125 in 124 in 165 in 1,003 cm...

  • Page 14: 2093-Vga Main Board Schematic

    Refer to the block diagram on page 15 (foldout) when reading this description. The Video Interface is designed around a custom IC and will accept DC or AC coupled positive analog video signals. It can also be used with negative analog and 4 line TTL.

  • Page 15: 2093-Vga Main Board Technician Assembly Drawing

    The CRT Auto Bias IC is a combination of digital and analog circuitry. The digital part is a counter and control logic which steps the analog circuits through a sequence of sample and hold conditions. The analog part uses a transconductance amplifier to control the voltage on a 10uF capacitor (one per gun).

  • Page 16: 2793-Cga Main Board Schematic

    The CRT for the 1493, 1793 and 2093 monitors have a 90° deflection angle. The 1993 incorporates 100° while the 2793 CRT has 110° and the 3693 has 111° deflection angles. These picture tubes have integral implosion protection and a EHT of 25KV.

  • Page 17: 2793-Cga Main Board Technician Assembly Drawing

    The sync pulse from the LA7851 triggers a one shot in the LA7838 which clamps the vertical ramp generation capacitor to 5V during the first half of vertical retrace. The ramp generation capacitor then charges via a constant current set by an external resistor.

  • Page 18: 2793-Vga Main Board Schematic

    The Remote Control PCB houses the: CONTROL DESCRIPTION CIRCUIT 1. H SIZE ----------- Horizontal raster size --------- Diode modulator 2. V SIZE ----------- Vertical raster size ------------- Vertical control 3. V RAS. POS. --- Vertical raster position ------- DC current to V. yoke 4.

  • Page 19: 2793-Vga Main Board Technician Assembly Drawing

    XX93 Monitor Block Diagram. The Switching Regulator is synchronized to the horizontal pulse and drives a power G2≈290V 2 For Dual Focus On Video Board. MOSFET. Unlike most regulators that have a common GND, this power supply has a common GAME G1≈–20V V+ and current is supplied from V- to GND.

  • Page 20: 2793-Vga Main Board Schematic

    X-Y VDC USING A DMM. Measurements 0VDC USE V. or H. SYNC. 27Vpp 57,F1 are taken with X-Y VDC Sync. CERONIX Model 1993-VGA Monitor Circuit. .093" pins AC VOLTS TEST POINT a white screen. Vp-p TP-REF. .093" pin Degaussing Peak to Peak ASS.

  • Page 21: 2793-Vga Main Board Technician Assembly Drawing

    NOTES NOTES Remote Connector VALUE PART No. BD SCH 191K, 0Ω, 62K, 143A 30Ω,139 4937, 141 POWER 100K, 113 510Ω, 004 24.3K 1%,1/4W CPR0148 1371 200pF, 138 0Ω, 532 FR205, 142 20.0K 1%,1/4W CPR0153 CPS1804 18Ω, 133 Wire Tie, 145A 115A 47Ω, CC,140 365K 1%,1/4W...

  • Page 22: 3693-Cga Main Board Schematic

    X-Y VDC USING A DMM. Measurements 0VDC USE V. or H. SYNC. 27Vpp 57,F1 are taken with X-Y VDC Sync. CERONIX Model 1993-SVGA Monitor Circuit. .093" pins AC VOLTS TEST POINT a white screen. Vp-p TP-REF. .093" pin Degaussing Peak to Peak ASS.

  • Page 23: 3693-Cga Main Board Technician Assembly Drawing

    NOTES NOTES Remote Connector VALUE PART No. BD SCH 191K, 0Ω, 62K, 143A 30Ω,139 4937, 141 POWER 100K, 113 510Ω, 004 24.3K 1%,1/4W CPR0148 1371 200pF, 138 FR205, 142 28.0K 1%,1/4W CPR0163 CPS1804 18Ω, 133 Wire Tie, 145A 115A 47Ω, CC,140 44.2K 1%,1/4W CPR0154 0Ω, 114...

  • Page 24: Video Board Schematic

    2.2 to 2.7Vdc 2.7K COUNTER Dark screen 4.2Vp-p 360uS 80-110VDC Ω 1000pF 2.2nF NE592 1.2K 5V REF Ω Ω Jumper CERONIX 3467 21 H. LINE FDH400 AUTO +12V COUNTER BIAS .1uF +9.3V ACTIVE 13350 New Airport Road 1N4148 1.8K PN2907A DECODER 1.8K...

  • Page 25: Video Board Technician Assembly Drawing

    30Ω, 859 PCB, 800 WIRE FOCUS ∆ ∆ RED WIRE 150Ω, CC 1K, 866 10K, CF 0Ω, 864 CERONIX CERONIX 100K, 876 ∆ 0Ω, 865 0Ω, 867 Model XX93-E7 Model XX93-E7 1.8K, 874 Video Board Video Board Note: Common part values marked on drawing.

  • Page 26: Video Board Technician Assembly Drawing

    ∆ 150Ω, CC RED WIRE 1 2 3 4 5 6 7 1K, 866 0Ω, 864 10K, CF ∆ 100K, 876 CERONIX CERONIX 0Ω, 865 0Ω, 867 Model XX93-E7 Model XX93-E7 1.8K, 874 Video Board Video Board 1 2 3 4 5 6 7 8 9 10 11 12 Note: Common part values marked on drawing.

  • Page 27: Safety Critical Components For Xx93 Monitors

    Description 102 CPC1027 D2 6,800pF ±5%, 100V, Film CAUTION: CERONIX XX93 Monitors MUST USE AN APPROVED ISOLATION TRANSFORMER. The monitor chassis must be connected to earth ground via a common connection in the system which contains the monitor. X-RAY NOTE: X-radiation is produced by electrons colliding with the phosphor and shadow mask at the front of the picture tube.

  • Page 28: Safety Critical Components For Xx93 Monitors

    Beschreibung 102 CPC1027 D2 6,800pF ±5%, 100V, Film VORSICHT: MONITOREN CERONIX XX93 MÜSSEN EINEN ANERKANNTEN LOKALISIERUNG TRANSFORMATOR BENUTZEN. Das Monitorchassis muß an die Masse angeschlossen werden, die über einen allgemeinen Anschluß im System gerieben wird, das den Monitor enthält. RöNTGENSTRAHLANMERKUNG: X-Strahlung wird durch die Elektronen produziert, die mit der Phosphor- und Schattenschablone an der Frontseite des Abbildung Gefäßes zusammenstoßen.

  • Page 29: Replacement Part List

    CERONIX XX93 Monitor Part List CPA4233, 1493-CGA CPA4247, 1793-SVGA CPA4112, 2093-CGA CPA4231, 2793-VGA CPA4235, 1493-CGA CPA4250, 1793-SVGA CPA4166, 2093-CGA CPA4254, 2793-VGA CPA4200, 1493-VGA CPA4221, 1993-VGA CPA4224, 2093-VGA CPA4172, 3693-CGA CPA4252, 1493-SVGA CPA4255, 1993-VGA CPA4227, 2093-VGA ISO XFR-75W W ISO XFR-100W...
  • Page 30 CERONIX XX93 Monitor Part List CPA4233, 1493-CGA CPA4247, 1793-SVGA CPA4112, 2093-CGA CPA4231, 2793-VGA CPA4235, 1493-CGA CPA4250, 1793-SVGA CPA4166, 2093-CGA CPA4254, 2793-VGA CPA4200, 1493-VGA CPA4221, 1993-VGA CPA4224, 2093-VGA CPA4172, 3693-CGA CPA4252, 1493-SVGA CPA4255, 1993-VGA CPA4227, 2093-VGA ISO XFR-75W W ISO XFR-100W...
  • Page 31 CERONIX XX93 Monitor Part List CPA4233, 1493-CGA CPA4247, 1793-SVGA CPA4112, 2093-CGA CPA4231, 2793-VGA CPA4235, 1493-CGA CPA4250, 1793-SVGA CPA4166, 2093-CGA CPA4254, 2793-VGA CPA4200, 1493-VGA CPA4221, 1993-VGA CPA4224, 2093-VGA CPA4172, 3693-CGA CPA4252, 1493-SVGA CPA4255, 1993-VGA CPA4227, 2093-VGA ISO XFR-75W W ISO XFR-100W...
  • Page 32 CERONIX XX93 Monitor Part List CPA4233, 1493-CGA CPA4247, 1793-SVGA CPA4112, 2093-CGA CPA4231, 2793-VGA CPA4235, 1493-CGA CPA4250, 1793-SVGA CPA4166, 2093-CGA CPA4254, 2793-VGA CPA4200, 1493-VGA CPA4221, 1993-VGA CPA4224, 2093-VGA CPA4172, 3693-CGA CPA4252, 1493-SVGA CPA4255, 1993-VGA CPA4227, 2093-VGA ISO XFR-75W W ISO XFR-100W...
  • Page 33 CERONIX XX93 Monitor Part List CPA4233, 1493-CGA CPA4247, 1793-SVGA CPA4112, 2093-CGA CPA4231, 2793-VGA CPA4235, 1493-CGA CPA4250, 1793-SVGA CPA4166, 2093-CGA CPA4254, 2793-VGA CPA4200, 1493-VGA CPA4221, 1993-VGA CPA4224, 2093-VGA CPA4172, 3693-CGA CPA4252, 1493-SVGA CPA4255, 1993-VGA CPA4227, 2093-VGA ISO XFR-75W W ISO XFR-100W...
  • Page 34 CERONIX XX93 Monitor Part List CPA4233, 1493-CGA CPA4247, 1793-SVGA CPA4112, 2093-CGA CPA4231, 2793-VGA CPA4235, 1493-CGA CPA4250, 1793-SVGA CPA4166, 2093-CGA CPA4254, 2793-VGA CPA4200, 1493-VGA CPA4221, 1993-VGA CPA4224, 2093-VGA CPA4172, 3693-CGA CPA4252, 1493-SVGA CPA4255, 1993-VGA CPA4227, 2093-VGA ISO XFR-75W W ISO XFR-100W...
  • Page 35 CERONIX XX93 Monitor Part List CPA4233, 1493-CGA CPA4247, 1793-SVGA CPA4112, 2093-CGA CPA4231, 2793-VGA CPA4235, 1493-CGA CPA4250, 1793-SVGA CPA4166, 2093-CGA CPA4254, 2793-VGA CPA4200, 1493-VGA CPA4221, 1993-VGA CPA4224, 2093-VGA CPA4172, 3693-CGA CPA4252, 1493-SVGA CPA4255, 1993-VGA CPA4227, 2093-VGA ISO XFR-75W W ISO XFR-100W...
  • Page 36 CERONIX XX93 Monitor Part List CPA4233, 1493-CGA CPA4247, 1793-SVGA CPA4112, 2093-CGA CPA4231, 2793-VGA CPA4235, 1493-CGA CPA4250, 1793-SVGA CPA4166, 2093-CGA CPA4254, 2793-VGA CPA4200, 1493-VGA CPA4221, 1993-VGA CPA4224, 2093-VGA CPA4172, 3693-CGA CPA4252, 1493-SVGA CPA4255, 1993-VGA CPA4227, 2093-VGA ISO XFR-75W W ISO XFR-100W...
  • Page 37 CERONIX XX93 Monitor Part List CPA4233, 1493-CGA CPA4247, 1793-SVGA CPA4112, 2093-CGA CPA4231, 2793-VGA CPA4235, 1493-CGA CPA4250, 1793-SVGA CPA4166, 2093-CGA CPA4254, 2793-VGA CPA4200, 1493-VGA CPA4221, 1993-VGA CPA4224, 2093-VGA CPA4172, 3693-CGA CPA4252, 1493-SVGA CPA4255, 1993-VGA CPA4227, 2093-VGA ISO XFR-75W W ISO XFR-100W...
  • Page 38 CERONIX XX93 Monitor Part List CPA4233, 1493-CGA CPA4247, 1793-SVGA CPA4112, 2093-CGA CPA4231, 2793-VGA CPA4235, 1493-CGA CPA4250, 1793-SVGA CPA4166, 2093-CGA CPA4254, 2793-VGA CPA4200, 1493-VGA CPA4221, 1993-VGA CPA4224, 2093-VGA CPA4172, 3693-CGA CPA4252, 1493-SVGA CPA4255, 1993-VGA CPA4227, 2093-VGA ISO XFR-75W W ISO XFR-100W...
  • Page 39 CERONIX XX93 Monitor Part List CPA4233, 1493-CGA CPA4247, 1793-SVGA CPA4112, 2093-CGA CPA4231, 2793-VGA CPA4235, 1493-CGA CPA4250, 1793-SVGA CPA4166, 2093-CGA CPA4254, 2793-VGA CPA4200, 1493-VGA CPA4221, 1993-VGA CPA4224, 2093-VGA CPA4172, 3693-CGA CPA4252, 1493-SVGA CPA4255, 1993-VGA CPA4227, 2093-VGA ISO XFR-75W W ISO XFR-100W...
  • Page 40 CERONIX XX93 Monitor Part List CPA4233, 1493-CGA CPA4247, 1793-SVGA CPA4112, 2093-CGA CPA4231, 2793-VGA CPA4235, 1493-CGA CPA4250, 1793-SVGA CPA4166, 2093-CGA CPA4254, 2793-VGA CPA4200, 1493-VGA CPA4221, 1993-VGA CPA4224, 2093-VGA CPA4172, 3693-CGA CPA4252, 1493-SVGA CPA4255, 1993-VGA CPA4227, 2093-VGA ISO XFR-75W W ISO XFR-100W...
  • Page 41 CERONIX XX93 Monitor Part List CPA4233, 1493-CGA CPA4247, 1793-SVGA CPA4112, 2093-CGA CPA4231, 2793-VGA CPA4235, 1493-CGA CPA4250, 1793-SVGA CPA4166, 2093-CGA CPA4254, 2793-VGA CPA4200, 1493-VGA CPA4221, 1993-VGA CPA4224, 2093-VGA CPA4172, 3693-CGA CPA4252, 1493-SVGA CPA4255, 1993-VGA CPA4227, 2093-VGA ISO XFR-75W W ISO XFR-100W...
  • Page 42 CERONIX XX93 Monitor Part List CPA4233, 1493-CGA CPA4247, 1793-SVGA CPA4112, 2093-CGA CPA4231, 2793-VGA CPA4235, 1493-CGA CPA4250, 1793-SVGA CPA4166, 2093-CGA CPA4254, 2793-VGA CPA4200, 1493-VGA CPA4221, 1993-VGA CPA4224, 2093-VGA CPA4172, 3693-CGA CPA4252, 1493-SVGA CPA4255, 1993-VGA CPA4227, 2093-VGA ISO XFR-75W W ISO XFR-100W...
  • Page 43 CERONIX XX93 Monitor Part List CPA4233, 1493-CGA CPA4247, 1793-SVGA CPA4112, 2093-CGA CPA4231, 2793-VGA CPA4235, 1493-CGA CPA4250, 1793-SVGA CPA4166, 2093-CGA CPA4254, 2793-VGA CPA4200, 1493-VGA CPA4221, 1993-VGA CPA4224, 2093-VGA CPA4172, 3693-CGA CPA4252, 1493-SVGA CPA4255, 1993-VGA CPA4227, 2093-VGA ISO XFR-75W W ISO XFR-100W...
  • Page 44 CERONIX XX93 Monitor Part List CPA4233, 1493-CGA CPA4247, 1793-SVGA CPA4112, 2093-CGA CPA4231, 2793-VGA CPA4235, 1493-CGA CPA4250, 1793-SVGA CPA4166, 2093-CGA CPA4254, 2793-VGA CPA4200, 1493-VGA CPA4221, 1993-VGA CPA4224, 2093-VGA CPA4172, 3693-CGA CPA4252, 1493-SVGA CPA4255, 1993-VGA CPA4227, 2093-VGA ISO XFR-75W W ISO XFR-100W...
  • Page 45 CERONIX XX93 Monitor Part List CPA4233, 1493-CGA CPA4247, 1793-SVGA CPA4112, 2093-CGA CPA4231, 2793-VGA CPA4235, 1493-CGA CPA4250, 1793-SVGA CPA4166, 2093-CGA CPA4254, 2793-VGA CPA4200, 1493-VGA CPA4221, 1993-VGA CPA4224, 2093-VGA CPA4172, 3693-CGA CPA4252, 1493-SVGA CPA4255, 1993-VGA CPA4227, 2093-VGA ISO XFR-75W W ISO XFR-100W...
  • Page 46 CERONIX XX93 Monitor Part List CPA4233, 1493-CGA CPA4247, 1793-SVGA CPA4112, 2093-CGA CPA4231, 2793-VGA CPA4235, 1493-CGA CPA4250, 1793-SVGA CPA4166, 2093-CGA CPA4254, 2793-VGA CPA4200, 1493-VGA CPA4221, 1993-VGA CPA4224, 2093-VGA CPA4172, 3693-CGA CPA4252, 1493-SVGA CPA4255, 1993-VGA CPA4227, 2093-VGA ISO XFR-75W W ISO XFR-100W...
  • Page 47 CERONIX XX93 Monitor Part List CPA4233, 1493-CGA CPA4247, 1793-SVGA CPA4112, 2093-CGA CPA4231, 2793-VGA CPA4235, 1493-CGA CPA4250, 1793-SVGA CPA4166, 2093-CGA CPA4254, 2793-VGA CPA4200, 1493-VGA CPA4221, 1993-VGA CPA4224, 2093-VGA CPA4172, 3693-CGA CPA4252, 1493-SVGA CPA4255, 1993-VGA CPA4227, 2093-VGA ISO XFR-75W W ISO XFR-100W...

  • Page 48: Video Interface Circuit, Function, Description (+ & - Analog)

    VIDEO INTERFACE CIRCUIT, FUNCTION, DESCRIPTION (+ & - Analog). The video interface circuit is a general The particular mode of operation is selected by purpose RGB type input circuit. This circuit inserting jumpers, different value components, connects the external video signal to the video and solder bridges.

  • Page 49: To 1.1V, -Analog, Dc, Video Interface Circuit Description

    5.6V to 1.1V, NEGATIVE ANALOG, DC COUPLED, VIDEO INTERFACE CIRCUIT DESCRIPTION. 0VDC SOCKET BOARD 28,D3 Beam current Red Video Amp. Feedback Filament TC11 Beam current Green Video Amp. Fil. Ret. TC12 Feedback Screen Beam current Blue Video Amp. Focus Feedback ARC PROTECT FIL.

  • Page 50: To .7V, +Analog, Dc Video Interface Circuit Description

    0V to .7V, POSITIVE ANALOG, DC COUPLED, VIDEO INTERFACE CIRCUIT DESCRIPTION. To Video Board Blanking & Beam Current Limit VIDEO GAIN Remote FDH400 LINE Control TC7 Red +12V 1.62K 604Ω 1.21K 4-7VDC 1.62K TC5 Green M. GAIN 5-9Vpp 62,B4 TC 3 Blue FDH400 2.7K 1.21K...

  • Page 51: 1Vp-P, +Analog, Ac Video Interface Circuit Description

    1Vp-p, POSITIVE ANALOG, AC COUPLED, VIDEO INTERFACE CIRCUIT DESCRIPTION. 16 13 +12V GAIN +12V Controls XRC5346A PN2222 Black Level Adjustment is optional. 0Ω 1N4937 1N4937 1N4937 1.87K 2.15K 2.15K 88.7Ω 0Ω 100Ω 105Ω 2.7K +12V PN2222 MPS2907 MPS2907 MPS2907 MPS2907 1N4148 1N4148 1N4148...

  • Page 52: Video Amplifier Circuit, Function, Description

    VIDEO AMPLIFIER CIRCUIT, FUNCTION, DESCRIPTION. The video amplifier, is a high speed push pull 127V amplifier, which can swing as much as 90 volts. 560Ω 120V The maximum dynamic output swing is limited to 60 volts. The rest of the output voltage range is 140Ω...
  • Page 53 127V VIDEO AMPLIFIER SCHEMATIC. .1uF Blue Video Amplifier 120V Ω Ω MPS2907 12.1K +12V 1.49K Ω Ω 40.2K Ω .1uF 250V 1370 MMBT 3904 BLUE 9.25V .015uF VIDEO Ω Dark screen CRT. 80-110VDC Ω NE592 1.0K PART Ω Ω Jumper FDH400 3467 AUTO...

  • Page 54: Video Board Power Supply And Arc Protect Schematic

    VIDEO BOARD POWER SUPPLY AND ARC PROTECT SCHEMATIC. Caution! 2 pin degaussing coil plug (CC1 & +127fV From MAIN PCB CC2) must be plugged in such that the pin +120V with the extra wire is closest to the fuse. UNPLUG WHEN REPAIRING MONITOR. 1/2W Focus 1/2W...

  • Page 55: Crt Auto Bias And Auto Bright Circuit, Function, Description

    CRT AUTO BIAS AND AUTO BRIGHT CIRCUIT, FUNCTION, DESCRIPTION. The auto bias circuit is a control system that bias circuit would adjust all three guns in the same direction to maintain constant black forms a closed loop for controlling the CRT bias level.

  • Page 56: Crt Auto Bias, Auto Bright, And Vertical Sync Delay Circuit Description

    CRT AUTO BIAS AND AUTO BRIGHT CIRCUIT DESCRIPTION. The beam current feedback circuit uses a PNP video Load resistor eliminates crossover distortion from transistor to direct most of the beam current to the the OP Amp. . Resistor protects the auto bias circuit while passing the voltage waveform, transistor and OP Amp.

  • Page 57: Crt Auto Bias And Auto Bright Schematic

    CRT AUTO BIAS AND AUTO BRIGHT SCHEMATIC. 100K, 1/2W 2.2nF , 1KV 2.2K 1/2W 330pF 1,000pF AUTO BRIGHT CIRCUIT Adjust the bottom pot on the FBT for +4.2V Beam current off on 2SC3675 FDH400 +12V power down circuit. 100K 68.1K 1.8K LM324 100uF...

  • Page 58: Monitor, Block Diagram Review

    Monitor, Block Diagram Review. G2≈290V 2 For Dual Focus On Video Board. GAME G1≈–20V VIDEO Beam VIDEO VIDEO AMPS. Current Interface Feedback Bias SYNC Auto BLANKING V. & H. EHT≈25KV F.B.P. Bright V retrace Beam limit M. gain Beam current CRT AUTO High temp.

  • Page 59: Blanking, Master Gain, And Fault Circuit, Function, Description

    BLANKING, MASTER GAIN, AND FAULT CIRCUIT, FUNCTION, DESCRIPTION. SIMPLIFIED GAIN CONTROL CIRCUIT: VIDEO INTERFACE C5346 +12V Video GAIN SELECT Amp. +12V RESISTORS MASTER GAIN 3.6K 200Ω VIDEO GAIN LINE +7.5V One of three input circuits. HORIZONTAL BLANKING PN2222 +3.4V FLYBACK PULSE FAULT CIRCUIT SIGNAL 0VDC...

  • Page 60: Blanking, Master Gain, And Fault Circuit Description

    BLANKING, MASTER GAIN, AND FAULT CIRCUIT DESCRIPTION. The master gain control is connected The video gain line will source up to 32mA to the video gain line through a 1K resistor during blank time, which is the reason for . The voltage range of the video gain buffering the vertical blank comparator with line is programmable via resistors a PNP transistor...

  • Page 61: Blanking, Master Gain, Beam Limiter, And Fault Schematic

    BLANKING, MASTER GAIN, BEAM LIMITER, AND FAULT CIRCUITS SCHEMATIC. Remote control PCB +12V MASTER VIDEO GAIN LINE GAIN 4-7VDC 4-9Vpp 61,B4 +12V VERTICAL BLANKING 6.8K 6.8K (BIAS ACTIVE) 0Ω From auto bias IC pin 13 MPS2907 2-3VDC 1N4148 2.3- 4Vpp 63,C4 LM393 2.7V LM393...

  • Page 62: Vertical And Horizontal Sync Circuit Description

    VERTICAL AND HORIZONTAL SYNC CIRCUIT DESCRIPTION. For Interlaced Vertical Sync. Vertical Sync To LA7851 pin 19 Composite Sync Interface Vertical Sync To Horizontal Cycle Synchronization Horizontal Sync Sync 2 Comparators and Composite Sync Decoder To LA7851 pin 1 Composite sync or separate vertical and horizontal sync The synchronization circuit is bypassed, for interlaced are buffered by two comparators in the sync interface vertical sync, because this circuit rejects the half...

  • Page 63: Vertical Deflection Circuit Description And Schematic

    VERTICAL DEFLECTION CIRCUIT, FUNCTION, DESCRIPTION. The LA7851 IC is used for the vertical oscillator. The LA7838 is a vertical deflection control and high efficiency vertical yoke driver IC. Together they form a compact and efficient vertical deflection system. SIMPLIFIED VERTICAL DEFLECTION CIRCUIT +23V to +27V Vertical Sync Retrace...
  • Page 64 VERTICAL DEFLECTION CIRCUIT DESCRIPTION. LA7838 Ramp HEAT Ramp Reset Vertical Vert. SINK Gen. One Shot Drive Deflection V. size Retrace Reset Control Booster Ramp Slope 50/60Hz Drive +12V +27V Remote Control Board 5.5-6.4V 510Ω 3Vpp 21,D5 5-6VDC 5.5-6.5V 1.4Vpp 22,E5 1.4Vpp 23,F4 470uF Vertical...
  • Page 65 22-28V VERTICAL DEFLECTION SCHEMATIC. .8Vpp 24,F7 Thermal Protection Vertical Linearity Circuit V.+12V Vert. Capacitor multiplier for the 2793. DECREASES 200K 200K TOP AND BOTTOM MPS2907 2SC4159E 270Ω VERT. SIZE. Boost 30Ω 1N4005 .1uF 200K 200K 1,000uF 1N4005 0Ω INCREASES TOP AND PN2222 PN2222 BOTTOM...

  • Page 66: Horizontal Deflection Circuit Description And Schematic

    HORIZONTAL DEFLECTION CIRCUIT DESCRIPTION. 1N4007 2.2K.5W 12-18VDC +24V to 27V Supply 33Vpp 27,E7 100uF 2SC4159E 200Ω +12V Supply 5.4-6VDC +24V 3.92K 3.92K 11, E5 Remote Control comp. DELAYED PICTURE Horizontal 1N4007 MULTIPLIER Horizontal SYNC O/S SAW TOOTH POSITION Position TR . GENERATOR BIAS SYNC INPUT...
  • Page 67 HORIZONTAL DEFLECTION SCHEMATIC. 2SC5690 NO DVM Horizontal 100Ω TC11 Fil. .9KVpp 27,G6 Drive Fil. Rtn. TC12 1N4007 Transformer 2.2nF Screen Video Board FOCUS 1.2Ω To Yoke FLYBACK 107V-127V TRANSFORMER LA7851 HORIZONTAL OSCILLATOR DISCHARGE H. V+ 092A 10.8-12V 10, E6 3-7VDC 5.5-6.3V 5-6VDC FOCUS...

  • Page 68: Horizontal Raster Width Control Circuit Description

    HORIZONTAL RASTER WIDTH CONTROL CIRCUIT DESCRIPTION. The power output stage of the horizontal width The purpose of the horizontal width control is to: control circuit is a high efficiency switching mode 1. Provide a convenient means for adjusting driver. The FBT pulse is integrated by capacitor the horizontal raster size.

  • Page 69: Horizontal Raster Width And Position Control Schematic

    HORIZONTAL RASTER WIDTH AND POSITION CONTROL SCHEMATIC. Horizontal Raster Position Adjustment 68Ω 1W 0Ω 4.7Ω V+(+5V) 150Ω 1/2W 12mH 4.7Ω 0Ω 270Ω V+(-5V) 18Ω H. S. +12V +12V Line Vert. Output 510Ω 10.0K Vertical LM324 Yoke 100uF 100uF +6 Volt 1,000uF 10.0K Source...

  • Page 70: Dynamic Focus Circuit Function And Description

    DYNAMIC FOCUS CIRCUIT FUNCTION AND CIRCUIT DESCRIPTION. Model 1793-31.5DF NO DVM .8KVp-p 27,G6 FLYBACK Horizontal Drive TRANSFORMER Transformer CPT1505 1/2W, CC 470Ω 0Ω FOCUS 1N4007 #2 FOCUS 1.2Ω SCREEN H PLL 12-18VDC Dynamic Focus DM Drive 50Vpp 29,F6 0Ω Beam Current P/S Sync VERTICAL 1,000uF...

  • Page 71: Vertical Booster Amplifier Circuit And Description

    Vertical Booster Amplifier Circuit, Circuit And Function Description. Monitors with vertical deflection current which exceeds 2.2 Ap-p cannot be driven directly by the LA7838 vertical LA7838 deflection IC. The vertical booster amplifier circuit Thermal Protection Vertical reduces the output current of the LA7838 by amplifying Deflection Vert.

  • Page 72: Simplified Power Supply Circuit, Function, Description

    SIMPLIFIED POWER SUPPLY CIRCUIT, FUNCTION, DESCRIPTION. +52V to +127V LOAD FLYBACK DIODE H Dy & EHT Res. VIDEO line C5184 Error Amp. SECONDARIES User supplied Comp. Isolation DRIVER Transformer ENABLE REF. OSC. (-200V) The switching regulator includes the When the FET is turned off, the stored power FET which passes current from energy in the inductor continues supplying...
  • Page 73 If the is a tool necessary for trouble shooting flyback diode conduction is sensed, the low CERONIX monitors. When trouble shooting current start mode is selected. This mode the power supply, it can be connected to V- turns the FET on, to a current of .1A, for not...

  • Page 74: Switch Mode Power Supply Circuit Description And Schematic

    SWITCH MODE POWER SUPPLY CIRCUIT DESCRIPTION. Oscillator waveform without sync: Error Amp. V. Oscillator waveform with sync: Fet Drive FET drive, C5184 pin 10: With Sync The series regulator IC , controls sense the max. current. Resistors current to the monitor GND by pulse width and capacitor reduce power supply modulation.
  • Page 75 SWITCH MODE POWER SUPPLY SCHEMATIC. V+ plus 20V ---Video Supply +24, 28V to Vertical Deflection. +16V, 18V to 12V Regulator. V+ plus 5V---H. Raster Shift V+ minus 5V---H. Raster Shift 167A 1N4937 100uF 100uF 0Ω -1.5V 198A 1N4937 +16V 2.33K 4.67K 250V 193K...

  • Page 76: Equipment Setup For Repairing The Model Xx93 Monitor

    Legend Description Represents the XX93 board part number. The parts list gives the CERONIX PART NUMBER which is indexed to the board part number. Part numbers of the resistors on the PRA indicated by LTR. LTR.No.

  • Page 77: Equipment Setup For Repairing The Model Xx93 Monitor

    Feuerprobe genannt. Legende Beschreibung Dieses stellt die Teilnummer des Brettes XX93 dar. Die Stückliste gibt die CERONIX-Teilnummer, die zur Brettteilnummer registriert wird. Teilnummern der Widerstände auf dem PRA angezeigt von LTR. LTR.No. PRA Anschlußstiftzahl. Gehört, um festzustellen welchem PRA die Anschlußstiftzahl, suchen Sie nach der nächsten PRA Teilnummer auf dieser Zeile.

  • Page 78: Power Supply Trouble Shooting Tips

    V+ load sensitive switching mode power supply in line to exceed +160V. First replace the zener. the CERONIX monitor. This feature can cause Never operate the monitor without the crowbar problems with servicing the monitor if the proper zener installed.

  • Page 79: Trouble Shooting Handbook

    Trouble Shooting Handbook The information that is written in this handbook is to help repair XX93 Monitors. Here is a guideline in which this handbook will follow: Color problems. Always wear safety glasses. No video with power. Caution; Use only one hand No V-H sync.
  • Page 80 Problem Tests Probable Solution Turn down M. Gain. If pin 1 still different Excessive Measure voltage of K-Film pin 1 replace K-Film. color. for each color. If affected color If pin 1 voltage same as others, has a .3V difference then others Turn down replace IC Desolder pin 1.
  • Page 81 Problem Tests Probable Solution Turn down M. Gain to minimum. Retrace Measure voltage, auto bias IC If any of the voltages are Lines . pins 2, 4, & 6 for 5.5V to 6.5V. not in the listed voltage range, replace IC Also measure voltage, pins 3, 5, &...

  • Page 82: Filament Voltage Test

    Filament Voltage Test. When replacing either the flyback transformer or the video board, the filament voltage may not be correct. Measuring the filament voltage is not accurate using a true RMS voltage meter, because of the high frequency components, which make up the filament voltage. An oscilloscope, with RMS capability, may be used to measure the filament voltage.

  • Page 83: Filament Voltage Test

    HeizfadenSpannung Test. Wenn der EHT-Transformator oder die Videokarte geändert wird, kann die Heizfadenspannung falsch sein. Die Heizfadenspannung besteht aus Hochfrequenzbestandteilen. Genaues Messen der Heizfadenspannung kann nicht mit einem Effektivwertmeßinstrument erhalten werden. Ein Oszillograph mit Effektivwertmessen-Fähigkeit kann benutzt werden, um die Heizfadenspannung zu messen. Obgleich ein Sichtprüfen der Heizfadenfarbe eine Anzeige der Heizfadenspannung ist, ist es gutes üblich, die Heizfadenspannung zu überprüfen, wenn es irgendeinen Zweifel ¸ber diesen wichtigen...

  • Page 84: Setup And Convergence Procedure

    Always keep one hand free to avoid making a complete electrical circuit. If the corner convergence is still not acceptable, shunts may be used to correct this problem. Shunts are available from CERONIX. Shunt order number is CPM2011.

  • Page 85: Setup And Convergence Procedure

    Schritt können für das günstigste Zusammenlaufen wiederholt werden müssen. Halten Sie immer eine Hand frei beim Arbeiten auf Elektronik. Wenn die Eckkonvergenz noch nicht annehmbar ist, können Shunts benutzt werden, um dieses Problem zu beheben. Shunts sind von CERONIX vorhanden. Shuntauftragsnummer ist CPM2011.

  • Page 86: Replacement Parts Purchase Order Form

    CERONIX, INC. 13350 New Airport Road Auburn, California 95602-7419 Tel. (530) 886 - 6400 Fax. (530) 888 - 1065 WEB. www.ceronix.com REPLACEMENT PARTS PURCHASE ORDER FORM Date Purchase Order No. Requisition No. Name BILL TO SHIP TO STREET & N0.

  • Page 87: 1493 Degaussing Coil Attachment Specification

    DEGAUSSING COIL ATTACHMENT SPECIFICATION. For The Model 1493 Video Monitor. Use degaussing coil part number CPS1766. ATTACH THE GROUNDING STRAP FIRST. With the degaussing coil leads centered on the bottom of the CRT, FORM THE COIL to avoid the remote control board.

  • Page 88: 1793, 1993, 2093 Degaussing Coil Attachment Specification

    Degaussing Coil & Grounding Strap Attachment Specification. For The Model 1793, 1993, 2093 Video Monitor. 1. The first item to attach to the picture tube is the grounding strap. Lay the tube face down on a soft surface. Slide the folded over end of the braided wire over the top left CRT mounting ear (The braided wire is oriented to the left).

  • Page 89: 2793, 3693 Degaussing Coil Attachment Specification

    Degaussing Coil & Grounding Strap Attachment Specification. For The Model 2793 and 3693 Video Monitor. 1. The first item to attach to the picture tube is the grounding strap. Lay the tube face down on a soft surface. Slide the folded over end of the braid over the left top CRT mounting ear.

  • Page 90: Highpot, For Shock Hazards, Circuit Description

    Highpot, For Shock Hazards, Circuit Description. For the models 1493,1793, 1993, 2093, 2793, and 3693 video monitors. It is the responsibility of the company which uses the Ceronix monitor in there system to make sure that no shock hazards exist. Below is a description of the highpot test to verify that the monitor is properly connected to an isolation transformer.

  • Page 91: Highpot, For Shock Hazards, Circuit Description

    Highpot, Für Schock Gefahren, StromkreisBeschreibung. Für die Modelle 1493,1793,1993,2093,2793, und 3693 videomonitoren. Es ist die Verantwortung der Firma, die den Ceronix Monitor in dort system benutzt, sich zu vergewissern, daß kein Schock Gefahren existieren. Unten ist eine Beschreibung Prüfung des highpot zu beglaubigen, daß...

  • Page 92: Wire Routing Instructions

    Wire Routing Instructions. Attach the protective earth, Fold remote cable to clear green / yellow, ground wire. CRT and add wire tie. Rout yoke wires Shorten focus wire over CRT neck. and add wire tie. Shorten EHT wire and add wire tie. Plug in video board.

  • Page 93: Precision Resistor Arrays

    Precision Resistor Arrays (PRAs). Make solder connection CA when using these C PRAs for replacement parts on the XX92 product line. 200Ω Ω Ω Ω 200Ω Ω Ω Ω 200Ω Ω Ω Ω 1.82 2.74K 1.82 5.00K 5.00K 5.00K 68.1K 68.1K 68.1K 900Ω...

  • Page 94: Precision Resistor Array

    Precision Resistor Arrays (PRAs). A - Increases Output Voltage by 10V 1.62K 0Ω 606Ω 820Ω 1.49 5.62K 3904 689Ω 1.2K 1N4148 40.2K 1N4148 150Ω 100Ω 2.2K 15Ω 12.1K 18Ω 3.32K 75Ω 301Ω 150Ω 560Ω 33Ω 180Ω 140Ω +12V +16V 9.25V +12V 127V 120V...

  • Page 95: Precision Resistor Array

    Precision Resistor Arrays (PRAs). A - Increases Output Voltage by 10V 1.29K 0Ω 606Ω 820Ω 1.49 5.62K 3904 689Ω 1.2K 1N4148 40.2K 1N4148 150Ω 100Ω 2.2K 15Ω 12.1K 18Ω 3.32K 75Ω 240Ω 150Ω 560Ω 33Ω 180Ω 140Ω +12V +16V 9.25V +12V 127V 120V...

  • Page 97: Monitor Input Drive Signal Worksheet

    The "Drive Signals To The Monitor Input" form is included here for those people who have problems interfacing their drive electronics with the Ceronix Monitor. DRIVE SIGNALS to the MONITOR INPUT voltage and waveforms, work sheet. CERONIX Company name: 13350 New Airport Road...

  • Page 98: Declaration Of Conformity

    DECLARATION OF CONFORMITY Manufacturer: C. CERONIX 13350 New Airport Road Auburn, California 95602 Component Color Monitor. Equipment: Models: 1493-CGA, 1493-VGA, 1493-SVGA. 1793-VGA, 1793-SVGA. 1993-VGA, 1993-SVGA. 2093-CGA, 2093-VGA. 2793-CGA, 2793-VGA. 3693-CGA. Component Isolation Transformer Assembly. Models: ISOXFR-75W, ISOXFR-100W. IEC 60950, 3rd Edition Standards: 'National Differences: AT, AU, CA, DE, ES, FR, GB, HU, RU, US, ZA.'...

  • Page 99: Iso Xfr-75W And Iso Xfr-100W Safety Isolating Transformer

    Models: ISO XFR-75W ISO XFR-100W SAFETY ISOLATING TRANSFORMER...

  • Page 100: Circuit Function Description

    Circuit Function Description. The basic function of the ISO XFR-75W and ISO XFR-100W is to isolate the line power for monitors requiring an isolation transformer. The transformer is designed to have a low leakage flux value which allows it to be mounted close to the CRT. To accomplish the low leakage flux, the transformer has two sets of primary and secondary coils mounted on a modified toroid type core.

  • Page 101: Auto Voltage Select Schematic And Assembly Drawing

    Shield YEL / GRN ISO XFR-75W, ISO XFR-100W Schematic. 3A Fuse Screw 0Ω Brown CPR0425 T501 L PC1 Screw T506 1N4007 6Ω, .45A, 250V WHITE T502 2.2nF T507 TZL200B 120VAC 200Vz T517 1.5uF, 400V output to Isolation T503 T512 monitor. 2.7Ω...

  • Page 102: Circuit Description

    Stromkreisfunktion Beschreibung Die grundlegende Funktion des XFR75W und des XFR100W ist, die Zeile Energie für die benötigenden Monitoren und Lokalisierung Transformator zu lokalisieren. Der Transformator wird entworfen, um einen niedrigen Durchsickernflusswert zu haben, der erlaubt, daß er nah an der CRT eingehangen wird.

  • Page 103: Installation Instructions

    WARNING! Grounding of the monitor is to be evaluated in the end user application. Installation Instructions. Mount the unit on a, grounded, flat metal surface using at least two screws. Note; The mounting surface should not have holes larger than 0.2"...
  • Page 104 AC Line Mains power. Preferred orientation for optimum cooling. CERONIX CHASSIS. The ISO XFR-75W/-100W MUST be grounded by mounting on a grounded, conductive surface via at least two screws. Mains power and ground connections must be made before WARNING: power is applied to the ISO XFR-75W or the ISO XFR-100W Isolation Transformers.
  • Page 105 WechselstromZeile. Hauptlinie Spannung Lagebestimmung Prefered für das optimale Abkühlen. CERONIX CHASSIS. Das XFR75W und das XFR100W müssen geerdet werden, indem man an einer geerdeten, leitenden Oberfläche mit mindestens zwei Schrauben einhängt. WARNING: Haupt ac Kraft und Erdanschlüsse müssen gemacht werden, bevor Spannung für DEN XFR75W oder Den XFR100W Isolierung †ransformator gegolten wird...

  • Page 106: Specifications

    Model ISO XFR-75W Specifications. Electrical: Notes: Rating; Input Output Volts; 120VAC 108VAC to 132VAC 108VAC to 146VAC Output wired for 120VAC. Volts; 240VAC 216VAC to 264VAC 108VAC to 146VAC Volts; 120VAC 108VAC to 132VAC 216VAC to 292VAC Output wired for 240VAC. Volts;...
  • Page 107 Model ISO XFR-100W Specifications. Electrical: Notes: Rating; Input Output Volts; 120VAC 108VAC to 132VAC 108VAC to 146VAC Output wired for 120VAC. Volts; 240VAC 216VAC to 264VAC 108VAC to 146VAC 216VAC to 292VAC Volts; 120VAC 108VAC to 132VAC Output wired for 240VAC. Volts;...

  • Page 108: Isolation Transformer Trouble Shooting

    Equipment setup for trouble shooting the ISO XFR-75W, ISO XFR-100W Isolation Transformers. SAFETY FIRST; Use only one hand when working on a powered up ISO XFR-75W, ISO XFR-100W to avoid electrical shock. Always wear safety glasses when working on powered up electronic equipment. Mains Power VARIABLE 2A Fuse...

  • Page 109: Isolation Transformer Troubleshooting

    Vorrichtungen haben zum Lösen von Problemen mit dem 75W und dem 100W Isolierung Transformatoren benutzt. SICHERHEIT ZUERST: Um elektrischen Shock zu vermeiden, benutzen Sie nur eine Hand beim Arbeiten auf einem angeschaltenen Transformator 75W oder 100W. Tragen Sie immer Sicherheitsgläser beim Arbeiten auf angeschaltener elektronischer Ausrüstung.

  • Page 110: Manual Voltage Select Schematic And Assembly Drawing

    ISO XFR-75W, ISO XFR-100W Schematic (Manual Voltage Select). Shield YEL / GRN 3A Fuse Screw 0Ω Brown CPR0425 T501 Screw L PC1 T506 WHITE 120 or 240VAC, 50-60Hz input power. 120VAC Switch output to Isolation 0Ω T518 Shown In 240VAC monitor.

  • Page 111: Part List Addendum

    Parts List Addendum.
  • Page 112 Parts List Addendum.
  • Page 113 Parts List Addendum.
  • Page 114 Parts List Addendum.

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