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24658/24678 示波器 检修手册

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  • 开发语言:Config
  • 实例大小:36.90M
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  • 发布时间:2022-11-20
  • 实例类别:其他配置
  • 发 布 人:海浪淘沙
  • 文件格式:.pdf
  • 所需积分:2
 相关标签: pdf 46 pd 24

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【实例简介】24658/24678 示波器 检修手册

【实例截图】

【核心代码】

TABLE 。 F CONTENTS
Page
插图目录 .................. iii
名单表 ..........................……. iv
运营商安全总结 .... vi
维修安全总结 ....... vii
第一节 技术参数规范
简介 .............................. 1-1
性能状况 ...... 1-1
第二节 操作资料
安全性 ........……................…........... 2-1
电压选择 .......... 2-1
电路保险丝 ....................................... 2-1
电源线 .. .... ........ .... .... .... ...... 2-1
仪器冷却 ...........….. 2-1
操作资料 .......... 2-1
启动 ................................……. 2-2
重新包装的货物 .. 2-2
第三节A 操作理论
(SN 8050000 & A80VE 以上 )
I 简介 ............................…. 3a-1
部分组织 ............. 3a-1
混合和集成
电路描述 .............. 3a斗
方块图 ...........….........…. 3a-1
块描述 ..............….. 3a-1
详细的电路描述.................................. 3a-5
简介 ..…......................... 3a-5
处理机与数字
控制方式 ..… ................................... 3a-5
前面板扫描和控制 .................…. 3a-9
FRONT-PANEL CONTROLS.…....... 3a-11
TRIGGERS, AND SWEEPS ............ 3a-17
VERTICAL CHANNEL SWITCH
AND OUTPUT AMPLIFIERS ........... 3a-23
READOUT ..….........…....................... 3a-27
HIGH VOLTAGE POWER SUPPLY
AND CRT FOR 24658 ONLY .......... 3a-35
HIGH VOLTAGE POWER SUPPLY
AND MCP-CRT FOR 24678 ONLY 3a-40
LOW VOLTAGE POWER SUPPLY. 3a-46
LOW-VOLTAGE REGULATORS.…. 3a-51
POWER DISTRIBUTION .............…. 3a-53
INTERCONNECTIONS ..........…....... 3a-53
第三节 THEORY OF OPERATION
(SN 8049999 & 8ELOW)
Page
INTRODUCTION .............................… 3-1
SECTION ORGANIZATION ..........… 3-1
HYBRID AND INTEGRATED
CIRCUIT DESCRIPTIONS .............. 3-1
BLOCK DIAGRAM ...........….........…. 3-1
BLOCK DESCRIPTION ..............….. 3-1
DETAILED CIRCUIT DESCRIPTION 3-5
INTRODUCTION ..…......................... 3-5
PROCESSOR AND DIGIT AL
CONTROL .........…............................ 3-5
FRONT-PANEL SCANNING and
ANALOG CONTROLS..................... 3-9
FRONT-PANEL CONTROLS ........... 3-11
ATTENUATORS AND PREAMPS .. 3-13
DISPLAY SEQUENCER,
TRIGGERS, AND SWEEPS .........… 3-17
VERTICAL CHANNEL SWITCH
AND OUTPUT AMPLIFIERS ........… 3-23
READOUT .............................…........ 3-27
HIGH VOLTAGE POWER SUPPLY
AND CRT FOR 24658 ONLY .......... 3-35
HIGH VOLTAGE POWER SUPPLY
AND MCP-CRT FOR 24678 ONLY 3-40
LOW VOLTAGE POWER SUPPLY. 3-46
LOW-VOLTAGE REGULATORS ..... 3-51
POWER DISTRIBUTION .............…. 3-53
INTERCONNECTIONS .................... 3-53
SECTION 4 PERFORMANCE CHECK AND
FUNCTIONAL VERIFICATION
INTRODUCTION ................................ 4-1
PREPARATION ....................…......... 4-1
VERTICAL ..............…......................... 4-4
TRIGGERING ........….........…..........….. 4-15
HORIZONTAL .................….........……. 4-20
PARAMETRIC MEASUREMENTS
CHECK .............................….........…… 4-27
COUNTER/TIMER/丁RIGGER
CHECKS ................….......................... 4-29
HORIZONTAL (cont).......................... 4-34
CALIBRATOR, EXTERNAL
Z-AXIS AND GATE OUTPUTS.……… 4-36
ADDITIONAL FUNCTIONAL
VERIFICATION ...........….........…......... 4-38
WORD RECOGNIZER CHECKS....... 4-40
24658/24678 Service
TABLE 。 F C 。 NTENTS (cont)
Page
SECTION 5 ADJUSTMENT PROCEDURE
INTRODUCTION .................….........…5-1
PARTIAL PROCEDURE .............….. 5-2
PREPARATION FOR
ADJUSTMENT.…......….......….......... 5-2
POWER SUPPLIES AND
DAC REF ADJUSTMENTS................ 5-2
24678 CRT ADJUSTMENTS ........…. 5-4
24658 CRT ADJUSTMENTS ........…. 5-7
CH 1 AND CH 2 INPUT
CAPACITANCE, AND
VERTICAL READOUT JπTER
ADJUSTMENTS ..........................……. 5-10
AUTOMATIC CALIBRATION
CONSTANTS, HORIZONTAL
AND VERTICAL GAIN,
CENTERING, AND TRANSIENT
RESPONSE ADJUSTMENTS ........…. 5-13
CAL 01-HORIZONTAL.. ................ 5-13
CAL 02-VERTICAL ....................... 5-16
CAL 03-TRIGGERING .................. 5-18
CAL 04-CH 2 DELAY
ENABLE/DISABLE ..............…......... 5-19
CAL 05-Set HRS ON and
PWR ON/OFF CYCLES ................... 5-20
CAL 06-VERTICAL
TRANSIENT RESPONSE ................ 5-20
CAL 07-READOUT CENTERING
AND GAIN........................................ 5-22
CAL 09-PARAMETRIC
MEASUREMENTS .......................... 5-22
DYNAMIC CENTERING,
DC BALANCE, AND
X- Y PHASE DIFFERENTIAL
ADJUSTMENTS ..........................……. 5-25
SECTION 6 MAINTENANCE
II
STATIC - SENSITIVE COMPONENTS 6-1
PREVENTIVE MAINTENANCE.......... 6-2
INTRODUCTION ........…................... 6-2
GENERAL CARE .................…......... 6-2
INSPECTION AND
CLEANING ........…·········….........……. 6-2
LUBRICATION ................................. 6-4
SEMICONDUCTOR CHECKS......... 6-4
PERIODIC READJUSTMENT ......... 6-4
TROUBLESHOOTING ....................... 6-5
INTRODUCTION ...........….........……. 6-5
TROUBLESHOOTING AIDS .......…. 6-5
TROUBLESHOOTING
EQUIPMENT .......胃,....� . . . . .口’口’'""'"'" 6-7
Page
TROUBLESHOOTING
TECHNIQUES .............................….. 6-7
DIAGNOSTIC ROUTINES ............... 6-10
CORRECTIVE MAINTENANCE ......... 6-20
INTRODUCTION .............................. 6-20
MAINTENANCE PRECAUTIONS .... 6-20
OBTAINING REPLACEMENT
PARTS ........……························……. 6-20
MAINTENANCE AIDS ........….......... 6-21
INTERCONNECTIONS ..............……6-21
TRANSISTORS, INTEGRATED
CIRCUITS, AND HYBRID
CIRCUITS ........................................ 6-22
SOLDERING TECHNIQUES ........…6-22
REMOVAL AND REPLACEMENT
INSTRUCTIONS .............................. 6-24
SECTION 7 OPTIONS
INTRODUCTION ..............…·········…. 7-1
POWER CORD OPTIONS.…........... 7-1
OPTION 01 ( 2465 B ONLY) .............. 7-1
OPTION 1 R ..........................…......... 7-1
OPTION 05 ...................................…7-2
OPTIONS 06 AND 09 .................….. 7-2
OPTION 10 ................................……7-2
OPTION 11 ...................................... 7-2
SECTION 8 24658 REPLACEABLE ELECTRICAL
PARTS
SECTION 9 24678 REPLACEABLE ELECTRICAL
PARTS
SECTION 10 DIAGRAMS
ACRONYM DICTIONARY
SECTION 11 24658 REPLACEABLE MECHANICAL
PARTS
SECTION 12 24678 REPLACEABLE MECHANICAL
PARTS
CHANGE INFORMATION
Diagn 。 stic and Troublesh 。。 ting Inf 。『『n ation:
DIAGNOSTIC ROUTINES ................................. 6-10
TROUBLESHOOTING CHARTS ..................… M SECTION 10
24658/24678 Service
LIST OF ILLUSTRATIONS
Figure
1-1 246S8 Dimensional drawing.. ..... ........... ............. ... ..... .... ...... ... ... .... ............... ........ ... ..... ... ..... ..... ... 1-22
1-2 24678 Dimensional drawing.......................................................................................................... 1-23
2-1 Line selector switch, line fuse, and detachable power cord ...... .......... ..... .... .... .... ... ..... .... ..... ....... 2-2
(For SN 8050000 & Above)
3-1 Instrument block diagram ................................................................. , ............................................ 3a-2
3-1 Instrument block diagram (cont) .................................................................................................... 3a-3
3-2 Address decoding .......................................................................................................................... 3a-7
3-3 Front-panel switch matrix..................... ........ ................................................................................. 3a-12
3-4 Scale illumination circuit ................................................................................................................ 3a-16
3-S Sweep generator ........................................................................................................................... 3a-22
3-6 Developing the readout display..................................................................................................... 3a-28
3-7 Readout display priorities .............................................................................................................. 3a-32
3-8 Timing of Refresh Prioritizer.......................................................................................................... 3a-33
3-9 Dc restorer circuit (246S8 only)..................................................................................................... 3a-38
3-10 Dc restorer circuit (24678 only)..................................................................................................... 3a-43
3-11 Timing relationships of the Inverter Drive signals......................................................................... 3a-48
3-12 Simplified schematic of control network....................................................................................... 3a-49
(For SN 8049999 & 8elow)
3-1 Instrument block diagram .............................................................................................................. 3-2
3-1 Instrument block diagram (cont) .................................................................................................... 3-3
3-2 Address decoding...................................................................................................................... .... 3-7
3-3 Front-panel switch matrix.............................................................................................................. 3-12
3-4 Scale illumination circuit................................................................................................................ 3-16
3-S Sweep generator..................................................................................................................... ...... 3-22
3-6 Developing the readout display..................................................................................................... 3-28
3-7 Readout display priorities.............................................................................................................. 3-32
3-8 Timing of Refresh Prioritizer.......................................................................................................... 3-33
3-9 Dc restorer circuit (246S8 only)..................................................................................................... 3-38
3-10 Dc restorer circuit (24678 only)..................................................................................................... 3-43
3-11 Timing relationships of the Inverter Drive signals ......................................................................... 3-48
3-12 Simplified schematic of control network....................................................................................... 3-49
6-1 Multipin Connector Orientation ..................................................................................................... 6-6
6-2 Ribbon Cable Removal.................................................................................................................. 6-26
6-3 Power Switch Push 8utton Disassembly ...................................................................................... 6-31
10-1 Color codes for resistors and capacitors.
10-2 Semiconductor lead configurations.
10-3 Locating components on schemcatic diagrams and circuit board illustrations.
10-4 Instrument block diagram.
10-S AS-Control board.
10-6 A6-Front Panel board.
10-7 A 1-Main and A8-Scale Illumination boards.
10-8 A 1S-Holdoff board.
10-9 A 14-Dynamic Centering board.
10-10 A4-Readout board.
10-11 A9-24678 High Voltage board.
10-12 A9-246S8 High Voltage board.
10-13 A2-Regulator and A3-lnverter boards.
Page
iii
2465B/2467B Service
iv
Table
1-1
1-2
1-3
1-4
1-5
1-6
1-7
1-8
2-1
3-1
3-2
3-3
3-4
3-5
3-6
3-7
3-1
3-2
3-3
3-4
3-5
3-6
3-7
4-1
4-2
4-3
4-4
4-5
4-6
4-7
4-8
4-9
4-10
4-11
4-12
4-13
4-14
4-15
4-16
4-17
5-1
5-2
5-3
5-4
5-5
5-6
LIST OF TABLES
Page
24658/24678 Electrical Characteristics ......... .... ....................... ........ ........ .................................... 1-2
Option 06 (C/T/T) Electrical Characteristics .................................................................................. 1-13
Resolution Selections.................................................................................................................... 1-19
Resolution Selections.................................................................................................................... 1-19
Option 09 (WR) Electrical Characteristics ..................................................................................... 1-20
24658 Mechanical Characteristics ........ '" ............ ... .... .... ..... ....... ....... .......... ... ..... ...... ........ .... ....... 1-21
24678 Mechanical Characteristics ......... '" ................................... '" ....... ........ .......... ...... ............... 1-22
Environmental Requirements......................................................................................................... 1-23
Power Cord and Voltage Data ...................................................................................................... 2-3
(For SN B050oo0 & Above)
Intensity Control ............................................................................................................................ 3a-19
Trigger Source Selection............................................................................................................... 3a-21
Vertical Display Selection ........... , .................................................................................................. 3a-24
Horizontal Display Selection......................................................... ................................................. 3a-26
81anking and Intensity Control Selection ...................................................................................... 3a-27
Readout Display Mode Selection .................................................................................................. 3a-31
Operation of Prioritizer Shift Register........................................................................................... 3a-32
(For SN B049999 & Below)
Intensity Control ............................................................................................................................ 3-19
Trigger Source Selection ............................................................................................................... 3-21
Vertical Display Selection .............................................................................................................. 3-24
Horizontal Display Selection.......................................................................................................... 3-26
81anking and Intensity Control Selection...................................................................................... 3-27
Readout Display Mode Selection.................................................................................................. 3-31
Operation of Prioritizer Shift Register........................................................................................... 3-32
Test Equipment Required.............................................................................................................. 4-2
Accuracy Limits .............................................................................................................................. 4-7
Accuracy Limits .............................................................................................................................. 4-9
CH 3 and CH 4 Accuracy Limits................................................................................................... 4-11
CH 1 or CH 2 Triggering Conditions............................................................................................. 4-16
CH 3 or CH 4 Triggering Conditions............................................................................................. 4-17
Settings for A and 8 Timing Accuracy Checks............................................................................ 4-22
Horizontal Timing Accuracy Checked Against the Graticule........................................................ 4-23
Delta Time Display Accuracy......................................................................................................... 4-25
Delayed Sweep Delta Time Accuracy........................................................................................... 4-26
Parametric Measurement Period Checks..................................................................................... 4-27
Parametric Measurement Volts Checks....................................................................................... 4-28
Data Setup Time Checks.............................................................................................................. 4-41
Data Hold Time Checks................................................................................................................. 4-42
Minimum Clock Pulse Width Checks............................................................................................ 4-42
Delay From Selected Edge to WORD RECOG OUT Checks ...................................................... 4-43
Word Recognition Delay................................................................................................................ 4-43
Power Supply Voltage and Ripple Tolerances .............................................................................. 5-3
Horizontal Timing........................................................................................................................... 5- 15
Horizontal Timing ................................................ " ... " ................. ,.................................................. 5-16
Vertical Calibration Signals ............................................................................................................ 5-17
Vertical Calibration Signals ............................................................................................................ 5-17
Parametric Measurement Calibration ............................................... , ........... , ....................... ,........ 5-23
24658/24678 Service
LIST OF TABLES ( c 。 nt)
6-1 Susceptibility to Static Discharge Damage ................................……·································…......... 6-1
6 ” 2 External Inspection Check List... ...............................矗• a � : a O a O O 墨 a : : C : : : 0 ’ 雹 0 0 a O 9 m , 0 a O a a a O …………哥,................... 6-2
6-3 Internal Inspection Check List.. ......….........….........…...............…··················…............................. 6-3
6-4
Sequence of Diagnostic Tests .......................…·······································…................................... 6-11
6-5 Sequence of Exerciser Routines ........................................................…·········….........……............. 6-13
6-6 Kernel Test Failure Codes ........…·…········…··········································………··················…........... 6-13
6-7 Front-Panel LED Option Codes ..........................................................................……..................... 6-13
6-8 Fr 。 nt-Panel LED Device Codes ........…..................….........….........….........……...............…............ 6-14
6 ” 9 Potentiometer Codes and Values (Exerciser 01) .......................................................................... 6-16
6-1 0 Pots and Switches Column ...........…························….........…·····················….............................. 6-17
6-11 NOP Test Data ........…··················….........…·…··························…................................................. 6-19
6-12 Maintenance Aids ..................…······························································….................................... 6-21

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