Tektronix 7140 Instruction Manual page 6

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TABLE OF CONTENTS (CONT)
TROUBLESHOOTING THE HIGH-EFFICIENCY
POWER-SUPPLY UNIT . . . . . . . . . . . . . . . . . . . . . . . ~ ~ ~ ~ . 4-7
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
PRELIMINARY PROCEDURE . . . . . . . . . . . . . . . . . 4-8
TROUBLESHOOTING PROCEDURE . . . . . . . . . . . . 4-8
TROUBLESHOOTING THE CRT AND ASSOCIATED
CIRCUITRY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12
CRT DISPLAY SYMPTOM CHECKOUT
PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13
CRT CIRCUIT TROUBLESHOOTING
PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13
CORRECTIVE MAINTENANCE . . . . . . . . . . . . . . . . . . . . . 4-22
OBTAINING REPLACEMENT PARTS . . . . . . . . . . . . . 4-22
SOLDERING TECHNIQUES . . . . . . . . . . . . . . . . . . . . 4-22
COMPONENT REMOVAL AND REPLACEMENT . . . . . 4-23
DISPLAY UNIT KICKSTAND . . . . . . . . . . . . . . . . . 4-23
POWER-SUPPLY UNIT REMOVAL . . . . . . . . . . . . 4-23
CATHODE-RAY TUBE REMOVAL . . . . . . . . . . . . . 4-24
CATHODE-RAY TUBE REPLACEMENT . . . . . . . . 4-25
CIRCUIT BOARDS . . . . . . . . . . . . . . . . . . . . . . . . - 4-25
PLUG-IN INTERFACE CONNECTORS . . . . . . . . . 4-30
DELAY LINE REMOVAL . . . . . . . . . . . . . . . . . . . . . 4-30
SEMICONDUCTORS . . . . . . . . . . . . . . . . . . . . . . . 4-30
INTERCONNECTING PINS . . . . . . . . . . . . . . . . ~ ~ . 4-34
PUSHBUTTON SWITCHES . . . . . . . . . . . . . . . . . . 4-35
GRATICULE LIGHT BULBS . . . . . . . . . . . . . . . . . . 4-35
POWER TRANSFORMER . . . . . . . . . . . . . . . . . . . . 4-35
LINE FUSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-37
ADJUSTMENT AFTER REPAIR . . . . . . . . . . . . . . . 4-37
7104 Instruction
PART I-PERFORMANCE CHECK . . . . . . . . . . . . . . . 5-15
INDEX TO PERFORMANCE CHECK
PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15
PERFORMANCE CHECK POWER-UP
SEQUENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15
A. Z-AXIS AND DISPLAY . . . . . . . . . . . . . . . . . . . . 5-16
B. CALIBRATOR AND OUTPUT SIGNALS . . . . . 5-18
C . TRIGGER SYSTEM . . . . . . . . . . . . . . . . . . . . . . 5-22
D . HORIZONTAL SYSTEM . . . . . . . . . . . . . . . . . . 5-24
E . VERTICAL SYSTEM . . . . . . . . . . . . . . . . . . . . . 5-27
F . READOUT SYSTEM . . . . . . . . . . . . . . . . . . . . . 5-31
G . PHOTOGRAPHIC WRITING RATE . . . . . . . . . . 5-33
PART II-ADJUSTMENT AND PERFORMANCE
CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-35
INDEX TO ADJUSTMENT AND PERFORMANCE
CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-35
ADJUSTMENT AND PERFORMANCE CHECK
POWER-UP SEQUENCE . . . . . . . . . . . . . . . . . . . . 5-35
A . POWER SUPPLY . . . . . . . . . . . . . . . . . . . . . . . 5-36
B . Z-AXIS AND DISPLAY . . . . . . . . . . . . . . . . . . . 5-38
C . CALIBRATOR AND OUTPUT SIGNALS . . . . . 5-46
D . TRIGGER SYSTEM . . . . . . . . . . . . . . . . . . . . . . 5-50
E. HORIZONTAL SYSTEM . . . . . . . . . . . . . . . . . . 5-54
F . VERTICAL SYSTEM . . . . . . . . . . . . . . . . . . . . . 5-61
G . READOUT SYSTEM SN B053266
& BELOW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-68
G . READOUT SYSTEM SN 8053267
& ABOVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-71
H . PHOTOGRAPHIC WRITING RATE . . . . . . . . . . 5-74
SECTION 8 INSTRUMENT OPTIONS
SECTION 5 CALIBRATION
USING THESE PROCEDURES . . . . . . . . . . . . . . . . 5-2
SECTION 7 REPLACEABLE ELECTRICAL PARTS
PERFORMANCE CHECK SUMMARY . . . . . . . . . . . 5-2
ADJUSTMENT INTERVAL . . . . . . . . . . . . . . . . . . . . 5-2
SECTION 8 DIAGRAMS AND CIRCUIT BOARD
TEKTRONIX FIELD SERVICE . . . . . . . . . . . . . . . . . 5-2
ILLUSTRATIONS
TEST EQUIPMENT REQUIRED . . . . . . . . . . . . . . . . . 5-12
SPECIAL FIXTURES . . . . . . . . . . . . . . . . . . . . . . . 5-12
SECTION 9 REPLACEABLE MECHANICAL PARTS
TEST EQUIPMENT ALTERNATIVES . . . . . . . . . . . 5-12
CHANGE INFORMATION

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