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ZCM-1490
Service manual
Zenith ZCM-1490 Service Manual
Color video monitor
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Service manual
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Table Of Contents
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Warnings and Cautions
Contents
Introduction
Specifications
Installation
Controls and Connections
Front View
Rear View
Subminiature D-Type Connector
Video Input Cable Pin Functions
Set-Up and Operation
Initial Tests
Color Bar Test
Fill Screen Test
Disassembly
CRT Anode Discharging
Rear Cover Removal
Rear Chassis Panel Removal
Video Board Removal
Control Board Removal
PIN Board Removal
Fan and Bottom Panel Removal
Support Bracket and Shield Removal
Deflection Board Assembly Removal
Power Supply/Dynamic Focus Board Assembly Removal
CRT Lead Dress and Removal
Adjustments
Video Board Adjustment Locations
PIN Board Adjustment Locations
Dynamic Focus Board Adjustment Locations
Preparation
Deflection Board Adjustments
Horizontal Hold
Horizontal DC Raster Centering
Horizontal Phase
Horizontal Size
Vertical Hold
Dynamic Focus
Focus
Vertical Linearity
Pincushion Adjustments
North-South Pincushion
CRT Cutoff
East-West Pincushion
CRT Gun Waveforms
Video Gain
Final Checks
Circuit Descriptions
Functional Overview
Block Diagram
Video Input Processing
Video Amplifiers
Video Drivers
Cascode Output Amplifier
DC Restoration
Sync Input Processing
Class AB Output Stage
Cutoff
Black Level
Vertical Processing and Controls
Horizontal Controls
Mode Selection
Horizontal Deflection
Horizontal Driver
Horizontal Output
Anode Voltage
Anode Voltage Regulator
High Voltage Shutdown
Automatic Brightness Limiter
Vertical Deflection
Vertical Centering
Blanking Pulses
Pincushion Correction
E-W Waveform Generator
East-West Regulator
North-South Waveform Generator
Degaussing Coil
N-S Output
Troubleshooting
Safety Guidelines
AC Leakage Test
Suggested Tools and Equipment
Inspection and Preparation
AC Leakage Voltmeter Circuit
Cleaning Procedure
Disk-Based Diagnostics
Surface Mount Component Replacement
Troubleshooting Charts
General Troubleshooting Chart
Resistance Measurements
Parts List
Schematics and Waveforms
Waveform Explanation
Oscilloscope Display Information
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Table of Contents
Troubleshooting
Troubleshooting
53
Surface mount component replacement
57
General troubleshooting chart
58
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