Zenith ZVM-1380 Page 19 Service Manual Download | Manualshive

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Summary of Contents for ZVM-1380

Page 1: ...UAL Color Video Monitor ZVM 1380 NI Hldata systems NOTE This preliminary manual is based upon preliminary engineering informa tion Your monitor may be slightly different than the one represented in th...

Page 2: ...vice Bulletins SERVICE DATE BULLETIN OF CHANGED NUMBER ISSUE PAGE S PURPOSE OF SERVICE BULLETIN LIMITED RIGHTS LEGEND Contractor is Zenith Data Systems Corporation of St Joseph Michigan 49085 The enti...

Page 3: ...g the unit WARNING Discharge the high voltage at the anode lead of the CRT before attempting service on the high voltage supply or associated circuits Refer to the ser vicing section of this manual fo...

Page 4: ...orm the user that the air vents at the bottom back and top of the monitor must not be blocked Page iv CAUTION Be sure the signal and power cables are unplugged from the computer or other signal and po...

Page 5: ...Supplies 4 2 Test Equipment 4 2 Inspection and Troubleshooting 4 3 Cleaning Procedure 4 4 Servicing Diagrams 4 4 Contents Chapter 5 Parts Lists Figures 1 1 Front Panel Controls and Indicators 1 3 1 2...

Page 6: ......

Page 7: ...nput signal operation Other display presentations may be used with some change in display position or appearance Power Input Video Input Horizontal Sync Vertical Sync Video Cable Connector CRT Display...

Page 8: ...al Resolution Vertical Resolution Misconvergence Page 1 2 640 dots Mode 1 and Mode 2 200 lines noninterlaced Mode 1 400 lines interlaced Mode 1 350 lines noninterlaced Mode 2 700 lines interlaced Mode...

Page 9: ...BER ONLY Contrast Adjusts the intensity of the intensified data on the screen Brightness Adjusts the intensity of the entire display G N A switch Selects green normal or amber display CAUTION Avoid se...

Page 10: ...se of a 120 VAC or a 240 VAC cable Voltage Select switch Selects 115 VAC or 230 VAC operation VSize 1 control Control vertical size for mode 1 V Size 2 control Controls vertical size for mode 2 H Cent...

Page 11: ...r bar test displays 16 different colors in the form of a bar graph A gray scale shades of a single color is displayed if the monitor is used with a com puter that does not have color capabilities If t...

Page 12: ...computer for the BASIC program op eration 2 Enter the program shown in Listing 2 2 3 Run the program by typing RUN and pressing the RETURN key The screen will be filled with the letter Z or any other...

Page 13: ...enhance the hue of a particular color by providing additional drive to the displayed color In this manner as many as 16 different colors can be displayed Chapter 3 Circuit Descriptions In mode 2 addit...

Page 14: ......

Page 15: ...rate the monitor with excessive high voltage any longer than necessary to locate the cause of the excessive voltage Chapter 4 Servicing WARNING Carefully handle the CRT when holding removing or instal...

Page 16: ...must be used during troubleshooting to prevent personal injury and or damage to the monitor or test eqUipment Page 4 2 Suggested Supplies and Equipment TOOLS AND SUPPLIES The following items are recom...

Page 17: ...The checkout procedure for each board or module follows after Table 4 1 Servicing Table 4 1 Fault Isolation PROBLEM POSSIBLE CAUSE ITEM TO CHECK Dead monitor No power power LED is not lit No raster Hi...

Page 18: ...are pro vided in this section The source location of waveforms referenced in the text are shown on both schematic and component location drawings A Z 150 PC computer was used to supply the RGB signals...

Page 19: ...05 Capacitor 22 f1 F 35 volts electrolytic CapaCitor 01 f1 F ceramic disc Capacitor 100 f1 F 16 volts electrolytic Capacitor 47 f1 F 25 volts electrolytic Capacitor 47 f1 F 25 volts electrolytic C206...

Page 20: ...pacitor 2 7 F 250 volts C419 Capacitor 22 F 160 volts electrolytic C546 Capacitor 0331LF C420 Capacitor 100 pF ceramic disc C571 Capacitor 01 ILF ceramic disc C421 Capacitor 1 ILF 50 volts electrolyti...

Page 21: ...or 182076 0406 Transistor 28D667C D501 Diode 1N4148 or 182076 0407 Transistor BU208 D502 Diode 1N4148 or 182076 0408 Transistor 28C2898 D541 Diode 1N4148 or 182076 0409 IC LM324 or HA17324 D542 Diode...

Page 22: ...stor 1 5 fl 1 2 watt 5 R208 Control 10 k o brightness R319 Resistor 10 0 1 watt 5 R209 Control 10 k o contrast R320 Thermistor 2 2 0 1 watt R210 Resistor 56 k o R321 Resistor 2 0 0 R211 Resistor 33 0...

Page 23: ...0 kn 1 4 watt 5 R415 Resistor 1 5 kn 1 4 watt 5 R450 Resistor 39 kn R416 Resistor 4 7 kn R451 Control 22 kn 20 kV adjust R417 Resistor 1 kn R452 Resistor 2 kn 1 4 watt 5 R418 Resistor 620 n R453 Resis...

Page 24: ...atts R511 Resistor 4700 R559 Resistor 2 7 kO 2 watts R512 Resistor 4700 R560 Resistor 6 8 kO 2 watts R513 Resistor 1 kO R561 Resistor 6 8 kO 2 watts R514 Resistor 1 kO R562 Resistor 3000 1 4 watt 5 R5...

Page 25: ...1 2 watt 5 R587 Resistor 820 n R907 Control 10 kn R588 Resistor 27 kn 2 watts R589 Resistor 27 kn 2 watts R590 Resistor 6 8 kn 2 watts Transformers T402 Transformer TLN 125A R591 Resistor 6 8 kn 2 wa...

Page 26: ......

Page 27: ...BeL Parts Lists 229 1 2K 6 ma I35Y Figure 5 1 Part 1 Monitor Schematic Page 5 9 C9 Yll 3JOPI 2 1 _ A FBTG2 CJlT M34JOU 30X66...

Page 28: ...1S0Y _ _ _ r 22 sKV R436 0411 AGP10G C418 TP 21 182Pt a R485 lTP t 2 23S H54 i 11 C432 D R440 j t p 1 __ 22 fW 0306 IMI2 Q402 180 V FW82 K r 16 14 13 1 II 10 9 0404 A418 1 50V Y06E I 25D66 lt 100 N 2S...

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