Zenith ZVM-130 Page 39 Service Manual Download

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Summary of Contents for ZVM-130

Page 1: ...585 121 2 SERVICE MANUAL Color Video Monitor ZVM 130 7IN TN Idata systems 860 109 2...

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: ...ng 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 f...

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

Page 5: ...ents Video Output Module 70 5 2 Interface Module 85 5 2 Power Supply Board 65 5 2 Power Supply Assembly 65 5 3 CRT 105 5 3 Chapter 6 Parts List 6 1 Figures 1 1 Monitor Front View 1 1 1 2 Monitor Rear...

Page 6: ...inouts 3 4 6 6 A 13284 Heat Sync Assembly 6 8 6 7 A 12842 Capacitor and Cable Assembly 6 8 4 1 General Troubleshooting 4 3 6 8 9 293 03 Power Supply Module 6 8 6 9 A 9522 06 Secondary Control Panel 6...

Page 7: ...lowing controls indicators and connectors COLOR BLACK DISPLA Y LE VEL LEVEL DRIVE D GREEN WHITE Figure 1 1 Monitor Front View Power Switch Power Indicator Volume Display Drive Black Level Chapter 1 Ch...

Page 8: ...Electrical Power Dimensions Weight Page 1 2 Luma 1 Volt P P NTSC standard composite Audio 0 3 to 1 0 Volts RMS 2 5 MHz 100 nanoseconds Plus or minus 4 volts horizontal Plus or minus 4 volts vertical...

Page 9: ...E switch Chapter 2 Installation If the monitor is to be used for graphics display or text and color display select color by pulling out the GREENIWHITE switch 7 Turn on the computer and video monitor...

Page 10: ...ent will flow from one side of the AC line through the degaussing coil and thermis tor RX3296 to the other side of the AC line This high AC current demagnetizes the mask and then quickly drops to a va...

Page 11: ...deo output module and horizontal and Page 3 2 vertical sync signals for the sweep module These sig nals are developed from a composite video input sig nal Additionally ABL voltage is supplied from the...

Page 12: ...ness Range Control 3 Display Drive Control connector key 4 Sharpness Control 5 Noise Processor Switch 6 Black Level Control TP7 To Primary Control Board 1 Ground 2 Volume Control Circuit Descriptions...

Page 13: ...ound 2E9 To Interface Module 1 60 Volt Pulse 2 Horizontal Blanking connector key 3 Ground 4 5 Page 3 4 Vertical Sync Horizontal Sync Table 3 3 Video OutputModule PIN NUMBER SIGNAL NAME DESCRIPTION 5A2...

Page 14: ...the original de sign be modified or altered without permission from Zenith Electronics Corporation AC LEAKAGE TEST To prevent electrical shock after reassembly perform an AC leakage test on all expos...

Page 15: ...braid HE 490 185 Cable ties HE 354 59 Lint free cloths Page 4 2 TEST EQUIPMENT Oscilloscope DC to 100 MHz dual trace triggered sweep Tektronix Model 465 or equi valent Logic probe Capable of detecting...

Page 16: ...tical size on CRT R2172 2 Width adjust LX3261 Servicing Adjustments INTERFACE MODULE Background Red Green and Blue and G2 Adjustments These adjustments are to be made in a darkened room 1 Locate conne...

Page 17: ...UNLAWFUL R2390 CHROMA OSCILLATOR ADJUST POWER MODULE FX3201 FUSE L2278 3 58MHz TRAP ADJUST REPLACE ONLY WITH PART NUMBERS SHOWN ABOVE BACKGROUND ADJUST R2406 GREEN BACKGROUND ADJUST Figure 4 2 Adjust...

Page 18: ...interlaced video signal SWEEP MODULE Vertical Size and Vertical Center Adjustments These controls R2172 size and R2125 vertical center ing are to be adjusted under low light conditions 1 Turn the G2...

Page 19: ...y 4 Choose any character to fill the screen by pressing it The capital Z is recommended 5 Check to see if the screen is filled with the test character and if the width and height of the dis play are c...

Page 20: ...n the vertical axis illustrated to measure delta voltage or on the horizontal axis not illustrated to measure delta time o Reference cursor which may be varied either on the vertical axis illustrated...

Page 21: ...Page 4 8 Servicing Figure 4 5 Interface Module Component Waveforms Connector 9F2 Pin 1 Input Connector Connector 2A5 Pin RED Signal Location and IC1301 Pin1 Junction C 1303 and R 1303...

Page 22: ...YO R2420 J 1 121 B95A f hVcc R2415 R2439 I C2404 N L L rf c 10 t Pf r iK BLUE P 1 8 IICKGROUND 10 YO 1 YO 0121 ____________ 1 YO A2425 20 R24 t lOOK 1j2W I L C2400 r22M 35V vOC TO VIDEO OUTPUT TO VID...

Page 23: ...13 R3221 s 1 i1 1 R3220 CiiiD r 0 0 Figure 4 7 Sweep Module Component Location Ciiil 10 1 Ie11 II I Pin 5 Pin 4 Pin 2 Pin 1 2E8 Connector 2E9 Pin 5 Horizontal Sync Connector 2E9 Pin 4 Vertical Sync Co...

Page 24: ...1 ZW I L J RX2125 3K VERT CENT I Rx2129 C21048 I IK I saOMF 1I 2W 2SV L __ J eAG e2149 l00MF 35V X2141 lii w _ J Q2148 121 1064 I C3403 C3421 PROV 1_ 0068 49 r 01 R l R2172 R 1 6 VER gIZE 1 2 9 391 L...

Page 25: ...1 1 1 2 9 293 MODULE SERIES PASS POWER SUPPLY 1 3 114 802 SCREW THO FORM 8 18xO 312 TP B STAT BRONZE 2 2 2 2 4 19 733 04 CABLE TIE 1 1 1 1 5 A 13284 HEAT SINK ASSEMBLY SERIES PASS 1 1 1 6 F 20120 HEAT...

Page 26: ...l I L J 1 I ODC VOLTAGE SOURCE g OUND L _______ J TO SWEEP BOARD NOTE ALL PERIPHERAL INfORMATION IS FOR REfERENCE ONLY II APPLIES TO ASSEMBLIES WHERE INDICATED AS SHOWN Q TOOC VOLTAGES NOTES AG GROUNO...

Page 27: ...7 TO NTERFACE _ _ _ GREEN MODULE _ _ _ _REO _ _ _ _ _ _1 VOC Page 4 14 NOTES 1 i HE I S UFliD ACENT TOLERANCE 2 CAPACITORS ARE IN MICROFARADS UNLESS OTHERWISE SPECIFIED Figure 4 15 Video Output Modul...

Page 28: ...COLOR TINT SHARP CONNECTORS DRI VE LEVEL LEVEL NESS 204 895 10 0 l________ BR I ____________ fl TO 9 230 03 SCHEMATIC FOR A 9522 SERIES SECONDARY CONTROL Figure 4 17 I I 12 I VDC I SHARPNESSI NDISEswP...

Page 29: ...MTG CABLE AND HSNG ASSY 0 312P lUP 1 TWIN LEAD 3S8 CABLE AND HSNG ASSY 0 156P 1P TP7 1 DESCRIPTION QTY Figure 4 18 Primary Control Board Component Location VOLUME CONTROL 15kn POT POWER SWITCH PUSH PU...

Page 30: ...11 11 11 11 11 301 66282N045EE 8 11 11 11 11 11 11 301 86282N055EE 7 CABLE TIE CABLE SHIELDED LEAD PLUG 9H2 CONNECTOR CABLE ASSY 0 165P 2 CONDo 1 UP SHIELDED 9G3 CONNECTOR CABLE ASSY 0 165P 2 CONDo 1...

Page 31: ...nel 40 1 Remove the back cover 10 2 Remove the top cover 20 3 Remove the two screws 35 that secure the input panel to the right chassis CRT mounting plate 151 4 Chapter 5 Disassembly Reassembly Discon...

Page 32: ...152 Disconnect interface module connectors to allow access to screw 73 Loosen screw 73 and lift the sweep module up and toward the rear of the monitor Page 5 2 Video Output Module 70 1 2 3 4 5 6 Remov...

Page 33: ...cabinet top 20 Disassembly Reassembly 3 Discharge the high voltage and disconnect the high voltage lead from the CRT WARNING Discharge the high voltage at the anode lead to the CRT using a jumper lead...

Page 34: ...ere is no replacement part number assigned Assemblies identified by part numbers that start with the letter F are not available at this assembly level Chapter 6 Parts List Table 1 Monitor MajorAssembl...

Page 35: ...ic 151 12 8720 Right chassis mounting plate C1303 22 7648 23 47pFdisc 152 12 88720 01 Left CRT chassis mounting plate C1304 22 7774 08 0047 j l F polyester 153 12 08719 Channel support front C1451 22...

Page 36: ...trolytic Resistors C2401 22 7405 02 2 2 Il F electrolytic R1207 63 10235 65 510 G 1 4 watt 5 Diodes R1211 63 10235 73 1 1 kG 1 4 watt 5 R1212 63 10235 84 3 3 kG 1 4 watt 5 CR1301 103 142 01 Low voltag...

Page 37: ...4 watt 5 R2417 63 10235 72 1 kG 1 4 watt 5 R2257 63 10235 72 1 kG 1 4 watt 5 R2418 63 10243 56 220 n 1 2 watt 5 R2276 63 10235 74 1 2 kG 1 4 watt 5 R2419 63 10235 72 1 kn 1 4 watt 5 R2278 63 10235 78...

Page 38: ...ransistors 9 391 Sweep Module see Figure 4 7 05101 121 01034 NPN REFERENCE ZDSPART N A 126 02169 Heat sink for 05101 DESIGNATOR NUMBER DESCRIPTION N A 114 01403 Screw for 05101 N A 93 02110 Washer for...

Page 39: ...1 C3407 22 n73 10 0068 fl F polyester N A 114 802 Screw bronze for 01001 C3408 22 7862 01 1 fl F electrolytic C3410 22 n74 12 01 fl F polyester 02147 121 975 NPN C3411 22 7773 16 022 fl F polyester 02...

Page 40: ...R3412 63 10235 82 2 7 k O 1 4 watt 5 R2148 63 10243 68 600 0 1 2 watt 5 RX2170 63 10565 08 2 2 0 1 2 watt 5 R3413 63 10235 82 2 7 k O 1 4 watt 5 R2171 63 10235 52 150 n 1 4 watt 5 R3414 63 10938 35 2...

Page 41: ...V 1 2 watt DESIGNATOR NUMBER DESCRIPTION CRX3271 through Integrated Circuit Parts CRX3274 103 345 06 Low voltage general ICX3201 223 18 Voltage regulator Integrated Circuits N A 78 03169 Socket for I...

Page 42: ...039 06 Connector 6 circuit N A 78 3042 05 Connector 5 circuit chain N A 78 3042 06 Connector 6 circuit chain N A 86 389 Female terminal N A 157 44 Fastener push in Parts List Table 6 10 A 13042 Primar...

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