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Atari SM194, Technical Manual, Page: 26 / 41

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Summary of Contents for SM194

Page 1: ...SMI 94 Technical Manual Februari 199...

Page 2: ...ription 2 Electrical Characteristics 3 Display Performance 4 Controls 5 Options 6 Mechanical Description 7 Environmental Performance 8 Agency Compliance 9 Interface 10 Theory of Operation 11 Appendix...

Page 3: ...nitor can be custom configured for any horizontal scan frequency from 32 KHz to 128 KHz and for vertical field frequencies from 49 Hz to 120 Hz The specific values included in this document are for a...

Page 4: ...ative edge Positive Optional Signal Level TTL Signal rise fall TTL Pulse Width 0 5uSec min to 50 of total horizontal scan time Input Impedance typical 100 Ohms Frequency 32 KHz to 128 KHz Blanking 3 0...

Page 5: ...4 0 DISPLAY PERFORMANCE 4 1 Input Conditions Character Brightness Contrast Viewing Direction Viewing Distance Ambient Temp Supply Voltage Warm up time Display size 4 2 Video Rise Fall times At raster...

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Page 7: ...A B 0 07 inches max 4 5 5 Center Bow 0 07 inches max...

Page 8: ...ity 4 8 1 Jitter 4 8 2 Jitter and Swim resulting from Monitor Generated Sources Radiated power line interference of 0 005 inch max down to a frequency of 47 Hz Interference from other nonsynchronous s...

Page 9: ...reference black level will stay constant with 2 5 0 CONTROLS 5 1 User Brightness Power Switch Contrast Available on Grey Scale Units 5 2 Internal Contrast Brightness Horizontal Centering Phase Horizo...

Page 10: ...rd Bonded quarter wavelength optical coated panel available as options 6 4 Orientation Format Landscape and portrait with horizontal scan in Long or Short dimension 6 5 Controls Remote contrast LED Po...

Page 11: ...Storage Temperature Humidity Operating Altitude Nonoperating Altitude Sweep 5 500 5Hz 0 5g max from 0 to 200 Hz 0 33g max from 200 to 500 Hz Duration of sweep is 15 minutes then 15 minute dwell on pea...

Page 12: ...ignments ECL TTL 1 ECL Video TTL Video 2 ECL Video Return GND N C 3 H Sync H Sync 4 V Sync V Sync 5 N C N C 6 ECL Not Video TTL Video Return GND 7 ECL Not Video Return GND H Sync Return GND 8 Sync Ret...

Page 13: ...duration determined by C18 and R12 The PLL then centers this pulse on flyback The data centering potentiometer V10 should be set to center the video in the raster The amount and range of delay is set...

Page 14: ...ot side of the yoke to ground This component determines the size and length of the flyback pulse The S shaping capacitor s C25 C44 is used to correct linearity since the CRT face has a larger radius o...

Page 15: ...of C8 D3 allows the charge and discharge ramps to have adjustable slopes Vertical sync pulses come in on pin 5 See figure 2 The ramp generator is made up of a current generator controlled by current t...

Page 16: ...tical S shaping is done by using the TL43T U9 and C21 with R3 8 as an integrator The vertical ramp across R3 3 integrated becomes the vertical parabola on the output of U9 This parabola is fed back to...

Page 17: ...of C8 D3 allows the charge and discharge ramps to have adjustable slopes Vertical sync pulses come in on pin 5 See figure 2 The ramp generator is made up of a current generator controlled by current t...

Page 18: ...e high voltage supply will be shut down If Q9 does not receive a signal at the horizontal rate C3 9 will charge up and turn Q10 on which will provide a positive voltage to the remote shut down pin on...

Page 19: ...ning oscillator frequency is approximately equal to 1 55RC 3842 can also be synchronized to an external clock This is achieved by capacitively coupling a stepped down signal of the horizontal flyback...

Page 20: ...nsated by R24 and C24 Error current is fed through the optocoupler to the error amplifier of the 3842 3842 draws very little current in start up mode There is enough power from the line bleeders R2 an...

Page 21: ...for the non inverting input and thus the anode voltage In addition to the anode voltage 1200V and 120V are developed from the same transformer The remote shutdown will shut the high voltage supply dow...

Page 22: ...peaking inductor for the amplifier which helps Q2 turn on and off faster during it s transitions Any ripple or other noise on the voltage driving the cathode will probably show on the screen as shadi...

Page 23: ...ite sync and the other to a filtered composite sync The horizontal rate is filtered out by R23 4 and C223 The output is a negative vertical sync signal Composite sync is used for the horizontal sync s...

Page 24: ...1 A and separate sync uses JR101 B The sync separator separates the vertical sync signal from the composite signal This is accomplished with an exclusive OR gate U103D One input is tied directly to th...

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Page 28: ...o H h A05I AGD...

Page 29: ...FIGURE...

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Page 32: ...17 1 Phase Locked Loop Drift 13 3 0 10 Maximum Switching Power Supply 20 6 Tap 2 5 Brightness 14 5 G2 650 VDC 30 Footiamberts 3 L Display Quality 16 1 Use Reference Display Focus 15 6 Reference Q1002...

Page 33: ...op 220V werkt levert 9 25 40 Volt High Voltage Power supply levert 120 en 1200 Volt Deflection board Zorgt voor sync en dus voor de complete beeldbesturing unieke bescherming tegen inbranden bij vert...

Page 34: ...ce 17 1 Phase Locked Loop Drift 133 0 10 Maximum Switching Power Supply 20 6 Tap 2 5 Brightness 14 5 G2 650 VDC 30 Footlamberts 3fL Display Quality 16 1 Use Reference Display Focus 15 6 Reference Q100...

Page 35: ...3 M Q7 T2 120 V 14 M High voltage box deflec tion protection 1200 V 8 9 M High voltage box deflec tion protection Q5 D5 SPS defecten check VI FET transformator en output diodes vervang ook VI FET bij...

Page 36: ...is veel beter Atari krijgt VCX 1000 Moniterm beschikt over een support BBS De Atari interface kaart is ontwikkeld door een extreme ontwikkelaar De software is geschreven door deze ontwikkelaar en Ken...

Page 37: ...470PF NPO r T 1A IB IQ 1CLR 20 1CX IRC DIS U1 THR OUT TLCS5S TRIC CTRL CND 74LS221 2A 22 20 2CLR 20 2CX VIP PCA 1BK IK TO PIN 16 OF IH VERT UN 1 R28 180K 200K VERT HcICHT nvo 2SK 5V V4 4r VERT LIN CO...

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