4G5B
Service
TABLE OF CONTENTS
(cont)
SECTION
3 THEORY OF
OPERATION
pag®
INTRODUCTION 3-1
SECTION ORGANIZATION 3-1
INTEGRATED
CIRCUIT DESCRIPTIONS 3-1
GENERAL
DESCRIPTION 3-2
DETAILED DESCRIPTION
3
4
CHANNEL 1 PREAMP
3-4
CHANNEL
2
PREAMP
3-6
VERTICAL
SWITCHING LOGIC 3-6
VERTICAL MODE SWITCH 3-9
VERTICAL OUTPUT
AMPLIFIER
3-10
A AND B TRIGGER GENERATORS 3-11
SWEEP AND Z AXIS LOGIC CIRCUIT 3-12
A AND B SWEEP GENERATORS 3-16
HORIZONTAL
DISPLAY LOGIC 3-18
HORIZONTAL AMPLIFIER 3-18
CRT CIRCUIT
3-20
CALIBRATOR
3-24
LOW-VOLTAGE
POWER SUPPLY
3-25
FAN MOTOR CIRCUIT 3-27
SECTION 4 CALIBRATION
PROCEDURE
Introduction
4-1
Test Equipment Required
4-1
PERFORMANCE
CHECK
4
4
INDEX TO PERFORMANCE CHECK PROCEDURE 4-5
VERTICAL 4-6
TRIGGERS 4-12
HORIZONTAL 4-15
ADJUSTMENT PROCEDURE 4-19
INDEX
TO
ADJUSTMENT
PROCEDURE 4-21
POWER SUPPLY 4-23
DISPLAY AND
Z
AXIS 4-25
VERTICAL 4-27
TRIGGERS 4-40
HORIZONTAL
4-52
GATES, CALIBRATOR, AND EXT
Z AXIS
4-61
ii
REV B MAR 1980
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