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Zenith Manuals
Monitor
ZVM-1240
Service manual
Zenith ZVM-1240 Service Manual
Monochrome video monitors
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Table of Contents
Characteristics
Controls,Cables, and Indicators
ZVM-1240 and ZVM-1240-E Monitors
Specifications
Installation
BASIC Program Used to Fill the Screen with a Character
Circuit Description
ZVM-1240 and ZVM-1240-E Monitor Block Dia- Gram
Power Supply
High B + Indicating Circuit
Video and Highlight Driver Circuits
Horizontal Sweep
Horizontal Output
Vertical Sweep
Spot Burn Protection
Brightness
Focus
Dynamic Focus
Servicing
Safety and Service Guidelines
AC Leakage Test
AC Leakage Voltmeter Circuit
Other Precautions
Suggested Equipment and Supplies
Tools and Supplies
Test Equipment
Troubleshooting
General Troubleshooting
Circuit Board Troubleshooting
Adjustments
B+ (+16.2 V) Voltage
Focus
CRT Yoke
Positioning
Linearity
Cleaning Procedures
Servicing Diagrams
Main Board Component Location
Main Board Waveforms
ZVM 1240-/1240-E Schematic
B+ Supply Component Location
Waveform - Anode of CRX506
B+ Supply Schematic - ZVM-1240
B+ Supply Schematic - ZVM-1240-E
B + Supply Transistor Voltages
CRT Board Component Location
CRT Board Waveforms
CRT Board Schematic
ZVM-1240/1240-E Exploded View
Disassembly/Reassembly
Back Cover (130)
CRT Board (125)
Main Board (80)
Control Mounting Bracket (40)
Power Switch (110)
Crt (10)
Lead Dressing
Parts Lists
Major Assemblies
Electronic Components
Waveform Photograph Explanations
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Table of Contents
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Characteristics
3
Controls,Cables, and Indicators
4
Specifications
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585-123-01
SERVICE MANUAL
Monochrome Video Monitors
ZVM-1240/1240-E/1240-EM
7'''''H
I data
systems
860-111
Table of
Contents
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Table of Contents
Troubleshooting
Other Precautions
13
General Troubleshooting
14
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This manual is also suitable for:
Zvm-1240-em
Zvm-1240-e
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