Yes, a possible incorrect front panel setting on the Tektronix 371B that could cause it to measure half the VDC value compared to the Horizontal V/Div reading is an incorrect HORIZONTAL VOLTS/DIV knob setting. If the knob is not set properly, it may misrepresent the horizontal sensitivity, leading to incorrect voltage measurements on the display.

This answer is automatically generated

Summary of Contents for Tektronix 371B

Page 1 Service Manual 371B Programmable High Power Curve tracer 070-A843-50 Warning The servicing instructions are for use by qualified personnel only. To avoid personal injury, do not perform any servicing unless you are qualified to do so. Refer to all safety summaries prior to performing service.
Page 2 Copyright © Tektronix Japan, Ltd. All rights reserved. Copyright © Tektronix, Inc. All rights reserved. Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedes that in all previously published material. Specifications and price change privileges reserved.
Page 3 Tektronix, with shipping charges prepaid. Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the Tektronix service center is located.
Page 5: Table Of Contents
..........4–13 371B Service Manual...
Page 6 5–5 371B Setup and Initialization ........
Page 7 Table of Contents List of Figures Figure 2–1: Basic 371B block diagram ......2–4 Figure 2–2: Location of the LINE VOLTAGE INDICATOR .
Page 8 ........9–39 371B Service Manual...
Page 9 ......5–73 Table 5–13: Incremental Accuracy Using STEP MULTI .1X ..5–73 371B Service Manual...
Page 10 ....... 6–2 Table 6–3: Recommended accessories ......6–3 371B Service Manual...
Page 11 Do Not Operate in Wet/Damp Conditions. Do Not Operate in an Explosive Atmosphere. Keep Product Surfaces Clean and Dry. Provide Proper Ventilation. Refer to the manual’s installation instructions for details on installing the product so it has proper ventilation. 371B Service Manual...
Page 12 WARNING indicates an injury hazard not immediately accessible as you read the marking. CAUTION indicates a hazard to property including the product. Symbols on the Product. The following symbols may appear on the product: WARNING Protective Ground CAUTION Double High Voltage (Earth) Terminal Refer to Manual Insulated viii 371B Service Manual...
Page 13 Use Care When Servicing With Power On. Dangerous voltages or currents may exist in this product. Disconnect power, remove battery (if applicable), and disconnect test leads before removing protective panels, soldering, or replacing components. To avoid electric shock, do not touch exposed connections. 371B Service Manual...
Page 14 Service Safety Summary 371B Service Manual...
Page 15: Diagrams
Preface This is the service manual for the 371B Programmable High Power Curve Tracer. The manual contains information needed to service the 371B to the module level. Manual Structure This manual is divided into sections, such as Specifications and Theory of Operation.
Page 16: Manual Conventions
H Names of front panel controls appear in the same case (initial capitals, all uppercase, etc.) in the manual as is used on the 371B Programmable High Power Curve Tracer front panel. Front panel names are all upper-case letters;...
Page 17 6:00 a.m. – 5:00 p.m. Pacific time This phone number is toll free in North America. After office hours, please leave a voice mail message. Outside North America, contact a Tektronix sales office or distributor; see the Tektronix web site for a list of offices. xiii...
Page 18 Preface 371B Service Manual...
Page 19 Introduction This manual contains information needed to properly service the 371B Program- mable High Power Curve Tracer as well as general information critical to safe and effective servicing. To prevent personal injury or damage to the analyzer, consider the following...
Page 20 371B as well as new options. Warranty Repair Service Tektronix warrants this product for one year from date of purchase. The warranty appears on the back of the title page in this manual. Tektronix technicians provide warranty service at most Tektronix service locations. The Tektronix product catalog lists all worldwide service locations.
Page 21 Specifications...
Page 23: Product Overview
The 371B calculates these values for you, unlike earlier curve tracers where these functions had to be calculated manually. The 371B also has the ability to average readings to reduce the effects of random noise, which can obscure actual curve data.
Page 24 Product Overview 371B Service Manual...
Page 25: Table 1-1: Collector Supply Electrical Specification
Specifications This section contains the 371B Programmable High Power Curve Tracer specifications. All specifications are guaranteed unless labeled “typical”. Typical specifications are provided for your convenience but are not guaranteed. Performance Conditions The following electrical and environmental characteristics are valid for instru-...
Page 26 Tan Delta (Typical) Within "2.5 mA at 3 kV Sweep Start Voltage Less than +10 %, -10 % of peak volt. Valid for High Voltage mode. OUTPUTS Indicator Indicates all outputs (COLLECTOR SUPPLY, STEP GENERATOR output terminal) enabled/disabled mode. 371B Service Manual...
Page 27 Number of Steps 0 to 10. However, 0 to 5 when STEP/OFF SET AMPLITUDE setting is 5 V or 2 A. Step Polarity Positive, Negative Corresponds to the collector supply POLAR ITY when step generator INVERT is disabled. 371B Service Manual...
Page 28 With 1 kW load, 1 mA/step with STEP MULTI .1X off. Fall Time Less than 40 ms With 1 kW load, 1 mA/step with STEP MULTI .1X off. Overshoot/ Less than 10 % With 1 kW load, 1 mA/step and zero Variable Undershoot Collector Supply. 371B Service Manual...
Page 29: Table 1-3: Vertical Deflection System
300 W peak power watts 500 mA/div to 5 A/div 30 W peak power watts 100 mA/div to 5 mA/div 3 W peak power watts 10 mA/div to 500 mA/div 0.3 W peak power watts 10 mA/div to 500 mA/div 371B Service Manual...
Page 30: Accuracy
Supplemental Information A/D Converter Resolution 10 bits for 1024 division, 100 points per one division. Tolerance Within "2 count Max Data Point 1024 Max Sample Rate 1024 times Line frequency Min Sample Rate 1/8 times Line frequency 371B Service Manual...
Page 31: Table 1-6: Crt And Readout
5 V/div to 50 V/div 100 mV/div to 5 V/div Per Step Step Generator Current / Voltage Output At Step .1X Multi,readout is 1/10 times Per Step. 200 mV to 5 V Voltage source 1 mA to 2 A Pulsed Current 371B Service Manual...
Page 32: Table 1-7: Power Requirements
250 V, 4 A, Slow Line Frequency 48.0 Hz to 63.0 Hz Maximum Power Dissipation 400 W max. (Fully Loaded) Maximum line current is 4.5 Arms at 50 Hz, 90 V line, with 5 % clipping. 371B Service Manual 1-10...
Page 33: Table 1-9: Physical Specification
(no condensation) Altitude Operating Up to 3.0 km (10000 ft) Non Operating Up to 15 km (50000 ft) Maximum operating temperature decreases 1_C each 300 m (1000 ft) above 1.5 km (5000 ft) Relative Humidity 1-11 371B Service Manual...
Page 34 Meets the limits of the National Safe Transit Association test procedure 1A-B-2; 10 drops of 610 mm (24 in). Packaged transportation vibration Meets the limits of the National Safe Transit Association test procedure 1A-B-1 ;excursion of 25mm (1 in) p p at 4.63 Hz 10.8m/s for 60 minutes. 371B Service Manual 1-12...
Page 35: Table 1-13: Certifications And Compliances
CAN/CSA C22.2 NO. 1010.1 Self Declaration EN 61010 1 with second amendment Installation Category Power input - Installation Category II (as defined in IEC 61010-1, Annex J) Pollution Degree Pollution degree 2 (as defined in IEC 61010-1) 1-13 371B Service Manual...
Page 36: Table 1-14: Installation Category And Pollution Degree Descriptions
The area is protected from direct sunshine, rain, or direct wind. Pollution Degree 4 Pollution that generates persistent conductivity through conductive dust, rain, or snow. Typical outdoor locations. 371B Service Manual 1-14...
Page 37: Table 1-15: Text Display
GPIB Interface. The IEEE-488-1978 (GPIB) standard defines the GPIB interface functions and the allowed subsets of those functions. Function Implemented As Source handshake Acceptor Handshake Talker Listener Service request Remote/Local Parallel poll Device Clear Device trigger Controller 1-15 371B Service Manual...
Page 38 Specifications 371B Service Manual 1-16...
Page 39 General Information...
Page 41: General Information
General Information This section provides the following information: H Description and features of the 371B Programmable High Power Curve Tracer. H Measurement concept H Initial inspection procedure H Installation procedures H Repackaging procedure for shipment Product Description The 371B is a high-power, GPIB-programmable digital-storage curve tracer that provides static and dynamic semiconductor device testing.
Page 42: Related Manuals
371B to a particular measurement application. 371B Components The 371B consists of two large components: a main unit and a test fixture unit. Main Unit The main unit contains front and rear panel controls, indicators and connectors, a display CRT, and the control electronics.
Page 43 When the cover is closed the collector supply voltage is enabled. The enabled state is indicated by a red WARNING indicator on the 371B. When lit, the WARNING indicator indicates that the collector supply is enabled and that a dangerous voltage may appear at the patch panel terminals on the test fixture unit.
Page 44: Figure 2-1: Basic 371B Block Diagram
The display screen is designed to display the operating characteristics of the DUT in an easy-to-read, standard graph form. The 371B can be applied to a broad range of semiconductor test application, such as: H Semiconductor design analysis...
Page 45: Installation
Work carefully to avoid injury due to improper lifting. The CRT can implode if it or the 371B is handled severely. When handling the 371B always be aware of and practice safe work habits. If damaged, the CRT...
Page 46: Table 2-1: Line Voltage Ranges
General Information 5. Thoroughly inspect the 371B for mechanical and electrical defects that may have occurred during shipment. If the instrument has been damaged in shipment, first contact the shipping company and then contact your nearest Tektronix field representative. Checking Standard Standard accessories are shipped with your 371B.
Page 47: Figure 2-2: Location Of The Line Voltage Indicator
CAUTION. To prevent damage to the instrument, check the position of the LINE VOLTAGE INDICATOR located on the rear panel of the 371B before connecting the instrument to a line voltage source. Also, check to ensure that the proper line fuses are installed for the main and collector power supplies.
Page 48: Table 2-2: Power Cord Identification
General Information Table 2-2: Power cord identification Plug configuration Normal usage Option number North America Standard 125 V Europe 220 V United Kingdom 240 V Australia 240 V Switzerland 220 V China 240 V No power cord supplied. 371B Service Manual...
Page 49 11 minutes of cooling. WARNING. Prolonged use of the 371B at high power settings can make the device under test, test fixture unit, or protective cover hot enough to cause injury. Avoid touching any of these areas until cooled.
Page 50 The 371B is cooled by air drawn through the fan from the rear and blown out through holes on the side panels. To ensure proper cooling of the instrument, maintain clearance at top, sides, and rear of the instrument.
Page 51: Figure 2-3: Location Of The Rackmount Latch Release
371B into the rack. Once the 371B is installed in a rack, use care that when extended, the 371B does not tip the rack forward, causing personal injury or instrument damage.
Page 52: Figure 2-4: Rackmount Hole Spacing
When rackmounting the 371B, take note of the following: Allow one inch clearance above and below, and on the left and right sides of the 371B for air circulation. Allow at least three inches of clearance between the 371B rear panel and the rack enclosure for adequate cooling air and to provide cable clearance.
Page 53: Figure 2-6: Rackmounting Hardware
The front lip of the stationary track section must mount in front of the front rail to allow the 371B spring latch to function properly. The slide-out tracks consist of two assemblies, one for each side of the instru- ment.
Page 54: Figure 2-7: Mounting Stationary Rackmount Sections
4. After mounting the instrument in the slide-out tracks, adjust for proper width by loosening the front and rear screws and allowing the slides to seek the proper width. Center the instrument, then tighten the screws. Figure 2-7: Mounting Stationary Rackmount Sections 371B Service Manual 2-14...
Page 55 7. Once the instrument is out of the rack, press the latch release and push the instrument back into the rack. Rackmount to Cabinet To convert the 371B rackmount version to a cabinet model, use the following Conversion procedure (see Figure 2–8): 1.
Page 56: Figure 2-8: Cabinet-To-Rackmount Conversion
General Information Cabinet to Rackmount To convert the 371B cabinet model to a rackmount version, use the following Conversion procedure (see Figure 2–8): Figure 2-8: Cabinet to Rackmount Conversion 1. Remove the bracket from each comer on the rear panel.
Page 57: Repacking For Shipment
General Information Repacking for Shipment If you must ship the 371B long distances, we recommend that you repackage the instrument the same as when it initially arrived at your site. The cartons and packaging material in which the instrument was shipped should be saved and used for this purpose.
Page 58 General Information 371B Service Manual 2-18...
Page 59 Theory of Operation...
Page 61: Theory Of Operation
Curve Tracer circuits. Block Diagram Description The following description is an overview of the 371B operation. Figure 3–1 is an overall block diagram of the 371B. The numbers enclosed in diamonds within each block in Figure 3–1 indicate the schematic diagrams associated with the block.
Page 62: Figure 3-1: 371B Block Diagram
Theory of Operation Figure 3-1: 371B Block Diagram 371B Service Manual...
Page 63 Display effect that the collector supply and step generator circuits have on the device under test (DUT). These circuits include: H Horizontal sense circuit H Vertical sense circuit H Sense board interface circuit H Display offset circuit 371B Service Manual...
Page 64 D/A converter circuit is selected and output to the CRT output circuit. Control and Processing This group of circuitry consists of circuits that control the 371B and circuits that process acquired data. These circuits are: H CPU circuit...
Page 65 The main power supply circuit supplies low-voltage operating power to the circuits of the 371B. It also outputs a TIM-INT signal synchronized to the frequency of the power line to the PLL and clock circuit and the CPU circuit.
Page 66: Detailed Circuit Description
Illustrations, for an explanation of schematic standards used in this manual. Mother Board The A1 Mother Board connects inter-board signals of the 371B. These include control, drive, data, reference, and sense signals, as well as power supply and ground lines.
Page 67 The display D/A converter circuitry is located on A4 Digital Display board. The Circuit display D/A converter circuitry consists of the following circuits: 1. X data & attribute prefetch latch 2. X-Y data & attribute load latch 371B Service Manual...
Page 68 –55 V power supply circuit and the voltage amplifier circuit. This circuit transforms the output of the step generator on the A3 A/D board into voltage steps of various amplitudes to be applied to the device under test. The STEP/ 371B Service Manual...
Page 69 This circuitry is located on the A14 Lower Key & FDD board, and consists of the bus buffer circuit, the address decoder interface signals with the A2 CPU board, set up collector supply VARIABLE settings, and transfer the status data to the A2 CPU board. 371B Service Manual...
Page 70 CRT circuit. The CRT HV power supply circuitry provides the various high voltage operating potentials required by the CRT, and displays the 371B data. GPIB & Printer Interface The GPIB and printer interface circuitry is located on the A22 Interface board.
Page 71 Maintenance...
Page 73: Preventive Maintenance
Cleaning The 371B should be cleaned as often as operating conditions require. Accumula- tion of dirt in the instrument can cause overheating and component breakdown. Dirt on components acts as an insulating blanket and prevents efficient heat dissipation.
Page 74: Visual Inspection
Air Filter Inspect and clean the air filter periodically to maintain cooling air flow. Remove the filter retainer (remove four attaching screws) from the rear of the 371B. Wash the filter in soapy water, rinse, dry, and replace on the 371B.
Page 75: Troubleshooting
Troubleshooting The following information is provided to facilitate troubleshooting the 371B: H Troubleshooting aids H Troubleshooting equipment H Troubleshooting techniques...
Page 76 “Adjustment and Test Point Locations” pullout pages appear in Chapter 8: Diagrams and Circuit Board Illustrations. Troubleshooting The following equipment is useful for troubleshooting the 371B. Equipment 1. Transistor Tester Description:...
Page 77 If there is any question about the correct function or operation of any control on the instrument, refer to the 371B User manual. Also, a user-initiated diagnostic routine allows you to check the functionality of each front panel push button or rotary switch.
Page 78 The 371B Troubleshooting charts in the Chapter 8: Diagram and Circuit Board Illustrations, provides a guide for locating defective circuits. Start at the top of the chart and perform the checks until one of the checks fails.
Page 79: Table 4-1: Default And Extended Power-Up Routines
Diagnostics The 371B has three sets of diagnostic routines. H Power-up diagnostics are run every time the 371B is powered up. There is a default set and and an extended set that can be run during power up. H User-initiated diagnostics can be used to verify the operation of the front-panel controls.
Page 80 If a checksum error is found, the error message is displayed in the error message area of the CRT graticule and the 371B does not advance to the next routine. ROM must function properly in order to continue with power-up diagnostics.
Page 81: Table 4-2: Power-Up System Error Messages
The operator can follow the lighting sequence to obtain a visual indication that the LEDs are operating. When all LEDs have been lit in sequence, the 371B diagnostic software advances to the display quality check. CAUTION. Be sure to turn the NON STORE/STORE/VIEW intensity control to a level that prevents burning the CRT when the display quality test pattern is displayed.
Page 82: Figure 4-1: Display Quality Test Pattern
The following message also appears in the text area of the display graticule. PUSH SHIFT KEY TO GO ON The displayed error can be ignored and the test continued by pressing the cursor SHIFT button. However, keep in mind that the front–panel control may not operate correctly. 4-10 371B Service Manual...
Page 83: Table 4-3: Front Panel Control Identification
To start this routine, simultaneously press the cursor SHIFT button, and the NON STORE button. To exit this routine, press the cursor SHIFT button, then press the NON STORE button once again. Table 4–3 lists the 371B controls and the corresponding numbers or messages. Table 4-3: Front Panel Control Identification Control...
Page 84 GPIB. To initiate this routine, the GPIB controller sends the TESt? query over the GPIB. The 371B responds by running its boot ROM and system RAM diagnos- tic routines and returning boot ROM and system RAM information to the...
Page 85: Disassembly/Assembly
Overview In the following procedures, directional terms (top, bottom, left, right) are based on the assumption that your 371B is in a normal, upright position and that you are facing the front of the instrument. Installation or reassembly procedures are the reverse of the disassembly procedures unless otherwise noted.
Page 86 Top and Side Panels. Before any assembly can be removed, the top and side panels must be removed. 1. Remove the four cabinet panel retainers from each corner of the 371B rear panel. 2. Remove the securing screw at the middle rear of the top panel. Slide the panel back to remove it from the 371B.
Page 87 Chapter 9: Mechanical Parts for location of related chassis-mounted sub-assem- blies and components. Drawer Unit. Perform the following to remove the drawer unit from the 371B. 1. Remove the right and left cabinet panels from the main unit. The drawer unit is secured to the main unit using a long metal bracket on each side.
Page 88 A23 FDD Interface Circuit Board. Remove and replace the A23 FDD Interface circuit board as follows: 1. Pull out the drawer unit from the main body of the 371B. 2. Remove the connector for J100 from the A13 Key Interface circuit board.
Page 89 4. Two cable assemblies, W622 and W632 are hardwired to the A30 Connector board. Remove these cables at J622 and J632, respectively, on the A10 Sense board. Remove the cables from the chassis clamps. 5. Remove the A30 board from the Front Porch assembly. 4-17 371B Service Manual...
Page 90 A31 Relay Board. Perform the following to remove the A31 Relay board. 1. Remove the drawer unit from the 371B. 2. Remove the shield (four screws) that covers the A31 Relay board and the A15 High-Current Control board.
Page 91 A16 High Current Control Board. Perform the following to remove the A16 High-Current Control board from the drawer unit. 1. Remove the drawer unit from the 371B. 2. Remove the shield (four screws) that covers the A31 Relay board and the A16 High-Current Control board.
Page 92 6. Remove the two screws exposed on the lower side of the CRT bezel, and remove the CRT bezel from the front panel. 7. Remove the CRT filter, spacer, and implosion shield from the CRT frame. 8. Remove the four screws located on the inner side of the frame. 4-20 371B Service Manual...
Page 93 10. Install the CRT bezel and bezel cover. 11. Reconnect the CRT anode cap. 12. If you installed a replacement CRT, perform the adjustment procedures provided in Chapter 5: Performance Check and Adjustment. 13. Install the right side, rear, and top panels. 4-21 371B Service Manual...
Page 94 Remove J192 from the A25 Main Power Supply board. 5. Remove the eight screws from the A1 Mother board. 6. Lift the A1 Mother board from the 371B. 7. Replace the A1 Mother board in the reverse order of removal.
Page 95 A7 Step Generator Circuit Board. Perform the following to remove and install the A7 Step Generator board. 1. Remove the top, rear, and right side panels from the 371B. 2. Remove J70, J72, J74, J76, and J78 from the A7 board.
Page 96 A11 Main Key Board. Perform the following to remove and install the A11 Main Key board. 1. Remove the top, rear, and side panels from the 371B. 2. Remove the CRT bezel from the front panel (refer to the CRT removal procedure).
Page 97 A22 Interface Board. Perform the following to remove and install the A22 Interface board. 1. Remove the top and rear panels from the 371B. 2. Remove J220 from the A1 Mother board. Refer to the “A2, A3, A4, and A5 Plug-In Circuit board”...
Page 98 A25 Main Power Supply Board. Perform the following to remove and install the A25 Main Power Supply board. 1. Remove the top and rear panels from the 371B. 2. Remove J72, J190, J192, J194, J250, J252, J280, and J290 from the A25 board.
Page 99 A28 and A29 Graticule Illumination Lamp Boards. Perform the following to remove and install the A28 and A29 Graticule Illumination Lamp boards. 1. Remove the top panel from the 371B. 2. Remove the CRT bezel cover from the lower side of the CRT bezel by pulling it off with your fingernail.
Page 100 Maintenance Also check that the air flow arrow marked on the fan is pointing toward the inside of the 371B. 4. Remove the four screws and nuts that secure the Cooling Fan to the rear panel. Lift the Cooling Fan, fan cover, filter, and fan guard from the rear panel.
Page 101 Performance Verification...
Page 103: Performance Verification
2000 hours of operation or at least once every year, to ensure that it is operating properly. At the same time, Tektronix recommends that you thoroughly inspect and clean the 371B as instructed in Chapter 4: Maintenance of this manual. Check the performance of this instrument at an ambient temperature between +10_C and +40_C unless otherwise stated.
Page 104: Test Equipment
The specifications for test equipment listed in Table 5–1 are the minimum required to check performance requirements of the 371B. Detailed operating instructions for test equipment are not given in these procedures; refer to the test equipment instruction manual if more information is needed.
Page 105: Table 5-1: Test Equipment
Special Fixtures Special fixtures are used to facilitate instrument adjustment. These fixtures are available from Tektronix, Inc. Order by part number from Tektronix field representatives. 371B Service Manual...
Page 106: Table 5-2: Performance Check And Adjustment Alternatives
It is not necessary to perform all the checks and adjustments whenever you make a minor repair or whenever a specific area of 371B performance is questioned. The performance check and adjustment procedures are designed to check a specific electrical specification or to perform a specific adjustment.
Page 107: Accuracy
Table 5-2: Performance Check and Adjustment Alternatives (Cont.) Task Procedure Options Functional Check of Front Panel Perform the First-Time Operating Exercises" in Section 3 of the 371B User manual. Controls and Connectors Perform the User-Initiated Push Button Diagnostic Routine" in Chapter 3: Maintenance. Complete Functional Check.
Page 108: Table 1-2: Step Generator
Amplitude Accuracy (Voltage) Maximum Voltage Offset Accuracy Short Circuit Limit Amplitude Accuracy (Current) D13, D15 Maximum Current D14, D16 Maximum Voltage in Current Mode Ripple and Noise Collector Supply Calibrator Voltage Gain Pulse Form Minimum Current Maximum Voltage 371B Service Manual...
Page 109: B Setup And Initialization
Perform the following to setup and initialize the 371B before making any performance checks or adjustments. Setup 1. Check that the 371B is set for the proper power source and that a suitable power cord has been attached. 2. Remove the 371B cabinet panels to gain access to internal adjustments and test points.
Page 110 Performance Verification With the power up settings in memory, you can initialize the 371B, as instructed, by performing the following: 1. Press the setup RECALL button (with the memory location set to location 1). 2. Check that the SET 1 message is displayed.
Page 111: Performance Check And Adjustment Procedures
371B and test equipment connections and that provides initialization instructions and control settings. NOTE. You will be instructed to initialize the 371B at the beginning of most procedures to prevent the carry-over of inappropriate setup conditions from previous procedures.
Page 112 Performance Verification Parts of Procedure. Each procedure is composed of sequentially-numbered steps. Functional headings, such as “Examining CRT Bias” and “Adjusting CRT Bias” are provided to help identify steps associated with a specific task. 5-10 371B Service Manual...
Page 113: Power Supply
NOTE. The characteristics examined in this step are examples of typical Deviation and Ripple instrument operation; they are not specifications. Equipment Setup: 371B 371B To 371B Ground Jack To 371B Ground Jack 371B Settings: Initialize the 371B Test Equipment Settings: DIGITAL MULTIMETER...
Page 114: Table 5-4: Voltage Regulation And Ripple
Test Point Deviation Limits (V) Ripple (mV) +5.2 V +4.992 to +5.408 v200 -12 V -11.4 to -12.6 v100 +12 V +11.4 to +12.6 v100 -6.5 V -6.5 -6.37 to -6.67 +6.5 V +6.5 +6.37 to +6.67 5-12 371B Service Manual...
Page 115 Adjusting the +2 V Reference (A25R500) Equipment Setup. Set up the equipment as shown in the following illustration and set controls as described. 371B To 371B Ground Jack 371B Settings: Initialize the 371B Test Equipment Settings: DIGITAL MULTIMETER Mode DC Voltage NOTE.
Page 116 Adjusting the -2 V Reference. 2. ADJUST R51 6 (–2 V ADJ) on the A25 Main Power Supply board, for a digital multimeter reading of –2.000 V. Removing the Setup. 3. Disconnect the digital multimeter leads from the 371B. 5-14 371B Service Manual...
Page 117 Performance Verification A4. Adjusting PLL To A3 371B Digital Multimeter 371B Settings: Initialize the 371B Test Equipment Settings: DIGITAL MULTIMETER Mode DC Voltage 1. Connect the Digital Multimeter test leads to A-GND test point and 9 pin of U110. 2. In case that the frequency of line power supply is 50 Hz, adjust R118 PLL FREQ-1 adjustment on the A3 A/D board for a digital multimeter readout of 2.0 "0.1 V.
Page 118 371B. Be certain that the digital multimeter ground lead is connected to the 371B ground terminal. 1. Use a #1 POZIDRIV screwdriver to remove the high-voltage shield from the left side of the 371B. There are three shields on the left side; remove the center shield. 5-16...
Page 119 5. Change the following 371B setting: POWER WARNING. To avoid electric shock hazard, be certain the 371B POWER switch is set to OFF before disconnecting the digital multimeter leads. 6. Disconnect the high voltage digital multimeter probe and negative lead from the 371B.
Page 120: Display
DC Voltage NOTE. See “Test Point and Adjustment Locations Pullout 1” in Chapter 8 for the location of test points for this step. Examining Horizontal CAL ZERO. 1. Change the following 371B setting: DISPLAY Mode CAL ZERO 5-18 371B Service Manual...
Page 121 Cal zero mode is initiated by pressing the VIEW button while holding down the SHIFT button. 2. EXAMINE the digital multimeter for reading between –0.995 and –1.005 V. Examining Horizontal CAL FULL. 3. Change the following 371B setting: DISPLAY Mode CAL FULL Cal full mode is initiated by pressing the STORE button while holding down the SHIFT button.
Page 122 Fully counterclockwise GRAT ILLUM Fully counterclockwise 1. While pressing the cursor SHIFT button, set the 371B POWER switch to ON. This displays the frame test pattern on the CRT. Examining CRT Bias. 2. EXAMINE the CRT for the center spot to be barely visible. If the spot is bright or not visible at all, the following adjustment may be necessary.
Page 123 NOTE. R210 can be adjusted through the access hole in the high voltage shield. 3. ADJUST GRID BIAS adjustment R210 on the A20 H.V. Regulator board until the CRT spot is barely visible. Removing the Setup. 4. Change the following 371B settings: INTENSITY NON STORE/STORE/VIEW Optimum intensity...
Page 124 371B 371B Settings: POWER FOCUS Fully counterclockwise 1. While pressing the cursor SHIFT button, set the 371B POWER switch to ON. This displays the Frame Test Pattern on the CRT. Examining Astigmatism. 2. Change the following 371B settings: INTENSITY NON STORE/STORE/VIEW...
Page 125 Performance Verification 4. ADJUST ASTIG adjustment R420 on the A18 CRT Output board for a circular spot shape. 5. Change the following 371B settings: FOCUS Clockwise for smallest pos sible spot INTENSITY NON STORE/STORE/VIEW Normal Viewing READOUT/CURSOR Normal Viewing 6. EXAMINE the CRT for the frame test pattern to be similarly in focused.
Page 126 Examining VIEW. 3. Press the ENTER button to store the displayed trace (spot) in memory location 1. 4. EXAMINE the display for ENTER COMPLETE message. 5. Change the following 371B setting: DISPLAY Mode VIEW 6. CHECK that the VIEW LED is lit.
Page 127 Performance Verification Examining NON STORE. 8. Change the following 371B setting: DISPLAY Mode NON STORE 9. CHECK that the NON STORE LED is lit 10. EXAMINE the CRT for a continuous increase in spot brightness as the NON STORE/STORE/VIEW INTENSITY control is turned from fully counterclockwise to fully clockwise.
Page 128 371B Settings: Initialize the 371B 1. Press the REF button. 2. CHECK that the REF LED is lit. 3. Change the following 371B setting: DISPLAY INVERT 4. EXAMINE the CRT for a continuous increase in brightness of the trace (spot) as the REF INTENSITY control is turned from full counterclockwise to full clockwise: 5.
Page 129 Equipment Setup. Set up the equipment as shown in the following illustration and set controls as described. 371B 371B Settings: Initialize the 371B, then set the following control as indicated. CURSOR Mode WINDOW 1. Examine the display for a continuous increase in readout and brightness as the READOUT/CURSOR INTENSITY control is turned from full counterclockwise to full clockwise.
Page 130 Gain (A3R622) Equipment Setup. Set up the equipment as shown in the following illustration and set controls as described. 371B 371B Settings: Initialize the 371B, then set the following control as indicated. CURSOR Mode DISPLAY Mode CAL ZERO NOTE.
Page 131 Cal full mode is initiated by pressing the STORE button while holding the cursor SHIFT button. Examining Cal Full. 7. EXAMINE the 371B for the following: H The vertical CURSOR readout is between 9.98 A and 10.02 A. H The horizontal CURSOR readout is between 9.98 V and 10.02 V.
Page 132 CURSOR readouts is 10.00 A between the cal zero and cal full modes. Example: Cal Zero –0.05 A, Cal Full 9.95 A, difference equals 10.00 A. 13. Press the REF button while pressing the cursor SHIFT button. This initiates cal off mode. 5-30 371B Service Manual...
Page 133 Initiating the Test Pattern. 1. While pressing the cursor SHIFT button, set the 371B POWER switch to This initiates the diagnostic routine. The logo first appears, followed by the display test pattern shown in Figure 5–1.
Page 134: Figure 5-1: Diagnostic Test Pattern Display
If the pattern centers do not align, the following adjustments are necessary. Adjusting SY POSITION and SX POSITION. The SX and SY POSITION controls change the frame test pattern position without changing the dot test pattern position. 5-32 371B Service Manual...
Page 135 H ORTHOGONALITY changes the test pattern shape from the rhombus to rectangular. H X-GAIN and Y-GAIN change the test pattern from rectangular to square. H Front-panel POSITION controls change the position of the whole display. Checking Orthogonality. 8. Change the following 371B settings: 5-33 371B Service Manual...
Page 136 A5 Display Control board to position the outer eight dots of the dot pattern within the inner and outer frame patterns. Checking and Adjusting Geometry. 13. Change the following 371B settings: POSITION Vertical and Horizontal Position the center dot pattern at graticule center.
Page 137 Looping Zero (A10R413) Equipment Setup. Set up the equipment as shown in the following illustration and set controls as described. 371B 371B Settings: Initialize the 371B, then set the following settings: COLLECTOR SUPPLY PEAK POWER WATTS 3 mW HIGH VOLTAGE...
Page 138 NOTE. See “Test Point and Adjustment Locations Pullout 2” in Chapter 8 for the location of adjustments R462, R422, and R413. 3. ADJUST TAN ZERO adjustment R462 on the A10 Sense board to align the trace with the horizontal graticule line. 4. Change the following 371B setting: COLLECTOR SUPPLY VARI 0.0 % ABLE...
Page 139: Measurement Accuracy
Equipment Setup. Set up the equipment as shown in the following illustration and set controls as described. TO A5TP 60 (HO) 371B Digital Multimeter TO A5TP 80 (GND) 371B Settings: Initialize the 371B, then set the following control as indicated. DISPLAY Horizontal 100 mV/DIV COLLECTOR CURSOR Mode Test Equipment Settings:...
Page 140: Table 5-5: Horizontal Balance Limits
SHIFT button and the 300 mW or 30 mW button. The indicator to the left of HIGH or LOW will change color from red to green. Adjusting Horizontal Balance. 2. Change the following 371B settings: DISPLAY Mode NON STORE...
Page 141 6. ADJUST H BAL adjustment R276 on the A10 Sense board for minimum spot shift while setting HORIZONTAL VOLTS/DIV from 50 V/DIV COLLECTOR to 500 V/DIV COLLECTOR. Rechecking After Adjustment. 7. Change the following 371B setting: DISPLAY Mode STORE 8. Repeat Step 1.
Page 142 CURRENT/DIV setting. Equipment Setup. Set up the equipment as shown in the following illustration and set controls as described. 371B 371B Settings: Initialize the 371B, then set the following control as indicated. COLLECTOR SUPPLY PEAK POWER WATTS 30 mW DISPLAY...
Page 143: Table 5-6: Vertical Zero Limits
If the CURSOR readout is within the given limits, go on to the next procedure. Adjusting Vertical Balance. NOTE. See “Test Point and Adjustment Location Pullouts 1 and 2” in Chapter 8 for the location of adjustment R645 and R146. 2. Change the following 371B settings: DISPLAY Mode NON STORE COLLECTOR SUPPLY...
Page 144 Performance Verification Rechecking After Adjustment. 8. Change the following 371B settings: DISPLAY Mode STORE COLLECTOR SUPPLY PEAK POWER WATTS 30 mW 9. Repeat Step 1. 5-42 371B Service Manual...
Page 145 READOUT plus 20 mV.) Equipment Setup. 1. Turn off the 371B. 2. Remove the connector at J76 on the A7 Step Generator board. 3. Turn on the 371B and configure as shown in the setup illustration below. 371B 371B Settings: DISPLAY...
Page 146: Figure 5-2: Setup For Determining Voltage Measurement Accuracy
Performance Verification 371B Calibration Fixture Figure 5-2: Setup for determining voltage measurement accuracy 5. Set the voltage source to 0 V. 6. CHECK that the horizontal CURSOR readout is within the limits shown in Table 5–7 for a voltage source of 0.000 V at each setting of HORIZONTAL VOLTS/DIV STEP GEN.
Page 147 READOUT plus 20 mV.) Equipment Setup. Set up the equipment as shown in the following illustration and set controls as described. 371B 371B Settings: Initialize the 371B, then set the following control as indicated. DISPLAY HORIZONTAL 100 mV/DIV COLLECTOR CURSOR...
Page 148: Figure 5-3: Setup For Determining Low Voltage Measurement Accuracy
2. CHECK that the horizontal CURSOR readout is within the limits shown in Table 5–8 at each setting of HORIZONTAL VOLTS/DIV COLLECTOR with changing each Voltage setting. 371B Calibration Fixture Figure 5-3: Setup for determining low voltage measurement accuracy Table 5-8: Collector Low Voltage Measurement Accuracy...
Page 149 TAL VOLTS/DIV setting. Equipment Setup. Set up the equipment as shown in the following illustration and set controls as described. 371B 371B Settings: Initialize the 371B, then set the following control as indicated. COLLECTOR SUPPLY PEAK POWER WATTS 30 mW DISPLAY...
Page 150: Figure 5-4: Setup For Determining High Voltage Measurement Accuracy
0 V or disabled. 7. Disconnect the voltage source from the Calibration Fixture. 8. Initialize the 371B. CAUTION. Before disconnecting the voltage source, make sure that the voltage source has been set to 0 V or disabled.
Page 151: Table 5-9: Collector High Voltage Measurement Accuracy
Mode Equipment Setup. Set up the equipment as shown in the following illustration and set controls as described. 371B 371B Settings: Initialize the 371B, then set the following control as indicated. COLLECTOR SUPPLY PEAK POWER WATTS 30 mW DISPLAY VERTICAL...
Page 152: Figure 5-5: Calibration Fixture Setup For Checking Collector Current Measurement Accuracy In High Voltage Mode
4. Verify that vertical CURSOR readout is within the limit shown in Table 5–10 at each setting of the current source, peak power watts, and VER- TICAL CURRENT/DIV. 5. Disable the current source, then disconnect the patch cords. 6. Initialize the 371B. 5-50 371B Service Manual...
Page 153: Table 5-10: Cursor Readout With Current
Current Mode Equipment Setup. Set up the equipment as shown in the following illustration and set controls as described. 371B 371B Settings: Initialize the 371B, then set the following control as indicated. DISPLAY VERTICAL 2 mA/DIV HORIZONTAL 500 mV/DIV COLLECTOR...
Page 154: Figure 5-6: Calibrating Cursor Readout For Checking Accuracy Of Collector Current Measurement
4. Connect the short patch cords and plug the two shorting bars over the 250 mW load resistor label as shown in Figure 5–7. 5. Close the protective cover. 6. Set the HIGH CURRENT breaker to ENABLED. 371B Calibration Fixture Figure 5-6: Calibrating CURSOR readout for checking accuracy of collector current measurement 5-52...
Page 155: Figure 5-7: Calibration Fixture Setup For Measuring High Collector Current Measurement Accuracy
8. CHECK that the vertical CURSOR readout is within a reading specified in Table 5–11. 9. Set the HIGH CURRENT breaker to DISABLED. 10. Remove the patch cords from the Calibration Fixture. 11. Initialize the 371B. Table 5-11: High Collector Current Measurement Accuracy PEAK POWER VERTICAL...
Page 156: Step Generator
Equipment Setup. Set up the equipment as shown in the following illustration and Multi .1X Balance set controls as described. (A3R510) 371B 371B Settings: Initialize the 371B, then set the following control as indicated. STEP GENERATOR SOURCE VOLTAGE STEP/OFFSET AMPLITUDE NUMBER OF STEPS...
Page 157 Determining Whether Adjustment is Necessary. 1. EXAMINE the digital multimeter for a reading of 0 mV"1 mV when the STEP/OFFSET AMPLITUDE is set to 5 V, 2 V, and 1 V. 2. Change the following 371B setting: STEP GENERATOR STEP MULTI .1X The indicator above the STEP MULTI .1X button will be lit.
Page 158 10. EXAMINE the digital multimeter for a reading of 0 V"1 mV when the STEP/OFFSET AMPLITUDE is set to 5 V, 2 V, and 1 V. 11. If further adjustments are required, repeat Steps 4 through 9. Removing the Setup. 12. Disconnect the digital multimeter leads and patch cords. 5-56 371B Service Manual...
Page 159 Equipment Setup. Set up the equipment as shown in the following illustration and (A7R417) set controls as described. 371B 371B Settings: Initialize the 371B, then set the following control as indicated. COLLECTOR SUPPLY PEAK POWER WATTS 30 W DISPLAY Mode...
Page 160: Figure 5-8: Calibration Fixture Connections For Procedure D2
1. ADJUST SGV BALANCE adjustment R405 on the A7 Step Generator board for no horizontal display shift when STEP/OFFSET AMPLITUDE is set back and forth between 500 mV and 1 V. Changing the Setup. 2. Change the following 371B settings: DISPLAY Mode STORE...
Page 161 VOLTAGE 9. Repeat Steps 5 through 8 to determine if further adjustment is necessary. Removing the Setup. 10. Disconnect the DC voltage source from the 371B. D3. Adjusting Step NOTE. The characteristics examined in this procedure are examples of typical Generator Gain (A3R518) instrument operation;...
Page 162 J340. 2. Change the position of jumper J340 on the A3 A/D board to the CAL position. 3. Change the following 371B setting: POWER Equipment Setup. Set up the equipment as shown in the following illustration and set controls as described.
Page 163: Figure 5-9: Calibration Fixture Connection For Adjusting Step Generator Gain
R518. 7. ADJUST SG GAIN adjustment R518 on the A3 A/D board for a digital multimeter reading of 10.00 V"0.01 V. Returning Jumper J340 to the Zero Position. 8. Change the following 371B setting: POWER 5-61 371B Service Manual...
Page 164 Performance Verification 9. Change the position of jumper J340 on the A3 A/D board to the Zero position. 10. Change the following 371B setting: POWER Removing the Setup. 11. Disconnect the digital multimeter. 5-62 371B Service Manual...
Page 165: Figure 5-10: Calibration Fixture Connections For Adjusting Step Generator Current Zero And Negative Current Balance
Current Balance (A7R380) Equipment Setup. Set up the equipment as shown in the following illustration and set controls as described. 371B 371B Settings: Initialize the 371B, then set the following control as indicated. DISPLAY Mode NON STORE Horizontal 100 mV/DIV STEP GEN...
Page 166 Correcting for Unsatisfactory Adjustment. NOTE. Repeat procedures D1 through D2 if R322 cannot be satisfactorily adjusted. Adjusting Negative Current Balance. 4. Change the following 371B setting: STEP GENERATOR INVERT The indicator beside the INVERT button will be lit. NOTE. See “Test Point and Adjustment Locations Pullout 2” in Chapter 8 for the location of adjustment R380.
Page 167 (A7R305) Equipment Setup. Set up the equipment as shown in the following illustration and set controls as described. 371B 371B Settings: Initialize the 371B, then set the following control as indicated. COLLECTOR SUPPLY PEAK POWER WATTS 30 W DISPLAY Horizontal...
Page 168: Figure 5-11: Calibration Fixture Connections For Adjusting Loop Gain In Current Source Mode
Performance Verification 371B Calibration Fixture Figure 5-11: Calibration Fixture connections for adjusting Loop Gain in current source mode 5. Close the protective cover. Noting the Reference Value. 6. Note the digital multimeter reading. This reading will be used in Step 9.
Page 169 Equipment Setup. Set up the equipment as shown in the following illustration and set controls as described. 371B 371B Settings: Initialize the 371B, then set the following control as indicated. STEP GENERATOR NUMBER OF STEPS Test Equipment Settings: TEST OSCILLOSCOPE...
Page 170: Figure 5-12: Calibration Fixture Connections For Checking Step Rates, Pulse Form
Performance Verification 371B Calibration Fixture Figure 5-12: Calibration Fixture connections for checking step rates, pulse form 4. Close the protective cover. 5. Set the test oscilloscope to DC coupling. 6. Set the test oscilloscope time/division to 50 ms/division. 7. CHECK that the pulse width is 450 ms to 550 ms at half amplitude and overshoot or undershoot is within 10 % of full amplitude.
Page 171 10 ms/DIV TRIGGERING LINE BANDWIDTH 20 MHz 1. Connecting the X1 probe tip from the test oscilloscope to the STEP GENERATOR VOLTAGE terminal and the ground lead to the COMMON terminal plugs as shown in Figure 5–13. 5-69 371B Service Manual...
Page 172: Figure 5-13: Calibration Fixture Connections For Checking Ripple Pulse Noise Of Voltage Source Mode
AMPLITUDE + 2 mV. H With STEP MULTI .1X on, variation between step amplitudes is less than 5 %. 1. Change the following 371B setting: POWER 2. Change the position of jumper J340 on A3 A/D board from ZERO to CAL.
Page 173 Performance Verification 3. Change the following 371B setting: POWER Equipment Setup. Set up the equipment as shown in the following illustration and set controls as described 371B 371B Settings: Change the following control as indicated. COLLECTOR SUPPLY PEAK POWER WATTS...
Page 174: Figure 5-14: Calibration Fixture Connections For Checking Incremental Accuracy
Performance Verification 371B Calibration Fixture Figure 5-14: Calibration Fixture connections for checking Incremental Accuracy 5. Close the protective cover. 6. Press the SINGLE button so that the spot moves to the left-most vertical graticule line. 7. CHECK the digital multimeter reading for the value specified for STEP 0 of Table 5–12.
Page 175: Table 5-12: Incremental Accuracy
23. Change the position of the jumper J340 from CAL to ZERO on the A3 A/D board. Table 5-13: Incremental Accuracy Using STEP MULTI .1X STEP DMM Reading (") -12 to +12 mV 180 to 220 mV 372 to 428 mV 564 to 636 mV 756 to 844 mV 5-73 371B Service Manual...
Page 176 H Each step is within 2 % of total output + 3 % of Step Amplitude + 2 mV. Source Mode 1. Change the following 371B setting: POWER 2. Change the position of jumper J340 from ZERO to CAL on the A3 A/D board and turn the POWER switch to ON.
Page 177 NUMBER OF STEPS SOURCE VOLTAGE STEP/OFFSET AMPLITUDE 200 mV Test Equipment Settings: DIGITAL MULTIMETER Mode DC VOLTAGE 3. Connect the digital multimeter between the STEP GENERATOR VOLTAGE terminal and the COMMON terminal as shown in Figure 5–15. 5-75 371B Service Manual...
Page 178: Source Mode
1.952 to 2.048 V 9.768 to 10.232 V 9. Disconnect the digital multimeter. 10. Press the RECALL button to initialize the 371B. 11. Proceed to the “Setup Conditions” for procedure D10 to check maximum voltage accuracy. Otherwise perform the following steps.
Page 179 Performance Verification 12. Set the 371B POWER switch to OFF. 13. Change the position of the jumper J340 from CAL to ZERO on A3 A/D board. D10. Checking Maximum Specifications: Voltage Accuracy of H Each step is within 2 % of total output + 3 % of Step AMPLITUDE + 2 mV.
Page 180 Performance Verification Equipment Setup. Set up the equipment as shown in the following illustration and set controls as described. 371B 371B Settings: Initialize the 371B, then set the following control as indicated. POWER COLLECTOR SUPPLY PEAK POWER WATTS 30 W...
Page 181: Figure 5–16: Setup For Checking Maximum Voltage Accuracy Of Voltage Source Mode
STEP/OFFSET AMPLITUDE to 200 mV. 6. CHECK that the digital multimeter reading is within the range specified in Table 5–15 for each STEP/OFFSET AMPLITUDE setting from 200 mV to 1 V. 7. Change the following 371B settings: STEP GENERATOR INVERT STEP/OFFSET AMPLI...
Page 182: Service Manual
Performance Verification 9. Press the SHINGLE button and change the following 371B settings: DISPLAY HORIZONTAL 5 V STEP GEN STEP GENERATOR STEP/OFFSET AMPLI TUDE NUMBER OF STEPS OFFSET 25.00 V 10. Press the REPEAT button five times until the spot moves to the right-most vertical graticule line.
Page 183 5 V of Step AMPLITUDE. Equipment Setup. Set up the equipment as shown in the following illustration and set controls as described. 371B 371B Settings: Initialize the 371B, then set the following control as indicated. COLLECTOR SUPPLY PEAK POWER WATTS HIGH VOLTAGE DISABLED...
Page 184: Figure 5–17: Setup For Checking Offset Accuracy
OFFSET column in Table 5–16 for each setting of STEP/OFFSET AMPLITUDE from 200 mV to 5 V. 4. Press the step generator INVERT button to turn invert on. 5. Repeat Step 3. 6. Change the following 371B settings: STEP GENERATOR INVERT STEP/OFFSET AMPLI...
Page 185: Table 5–16: Offset Accuracy
Performance Verification 8. Change the following 371B settings: STEP GENERATOR INVERT STEP OFFSET AMPLI 200 mV TUDE OFFSET -2000 mV 9. Repeat Step 7. 10. Remove the patch cords from the STEP GENERATOR VOLTAGE OUTPUT and the COMMON terminals. 11. Initialize the 371B.
Page 186 Voltage Source Mode Equipment Setup. Set up the equipment as shown in the following illustration and set controls as described. 371B 371B Settings: Initialize the 371B, then set the following control as indicated. STEP GENERATOR NUMBER OF STEPS SOURCE VOLTAGE...
Page 187: Figure 5–18: Setup For Checking Short Circuit Current Limit Of Voltage Source Mode
H Each step is within 2 % of total output + 3 % of step AMPLITUDE + 10 nA. Current Source Mode 1. Change the following 371B setting: POWER 2. Change the position of jumper J340 from ZERO to CAL on the A3 A/D board.
Page 188 NOTE. When the jumper position is changed from ZERO to CAL, store mode is disabled. Equipment Setup. Set up the equipment as shown in the following illustration and set controls as described. 371B Change the following 371B setting: POWER 371B Settings: Change the following control as indicated. COLLECTOR SUPPLY...
Page 189: Figure 5–19: Setup For Checking Amplitude Accuracy Of Normal Step Current Source Mode
Performance Verification 371B Calibration Fixture Figure 5-19: Setup for checking amplitude accuracy of normal step current source mode 4. Simultaneously press the SHIFT and COLLECTOR SUPPLY POLAR- ITY buttons to set VERTICAL AMP CHECK MODE. 5. Press the SHINGLE button, and press the REPEAT button ten times until the spot moves to the upper-most horizontal graticule line.
Page 190: Table 5–17: Current Amplitude Accuracy
10. To check maximum current accuracy, proceed to the “Setup Conditions” for procedure D14; otherwise perform the following steps. 11. Set the 371B POWER switch to OFF. 12. Change the position of jumper J340 from CAL to ZERO on A3 A/D board.
Page 191 Performance Verification Equipment Setup. Set up the equipment as shown in the following illustration and set controls as described. 371B Change the following 371B setting: POWER 371B Settings: Change the following control as indicated. COLLECTOR SUPPLY PEAK POWER WATTS DISPLAY...
Page 192: Figure 5–20: Setup For Checking Maximum Current Accuracy Of Normal Step Current Source Mode
3. Connect the digital multimeter between the STEP GENERATOR CUR- RENT terminal and the COLLECTOR SUPPLY HIGH VOLTAGE terminal as shown in Figure 5–20, and close the protective cover. 371B Calibration Fixture Figure 5-20: Setup for checking maximum current accuracy of normal step current source mode 4.
Page 193 –2043.0 mA). 9. Press the step generator INVERT button to turn invert off and disconnect the digital multimeter. 10. Set the 371B POWER switch to OFF. 11. Change the position of the jumper J340 from CAL to ZERO. 5-91...
Page 194 Equipment Setup. Set up the equipment as shown in the following illustration and set controls as described. 371B 371B Settings: Initialize the 371B, then set the following control as indicated. STEP GENERATOR NUMBER OF STEPS STEP/OFFSET AMPLITUDE 100 A...
Page 195: Figure 5–21: Setup For Determining Cursor Measurement Variation
Performance Verification 1. Connect long patch cords between the Calibration Fixture and the voltage source as shown in Figure 5–21. 371B Calibration Fixture Figure 5-21: Setup for determining cursor measurement variation 2. Apply 0.750 V from the voltage source. 3. Note the reading of the horizontal CURSOR readout.
Page 196: Figure 5–22: Setup For Measuring Pulse Amplitude Accuracy
Performance Verification 371B Calibration Fixture Figure 5-22: Setup for measuring pulse amplitude accuracy 8. Set the load resistor to 750 mW 9. Close the protective cover. 10. Move the dot cursor, using the cursor position buttons, to the right-most dot, representing the tenth step generator pulse.
Page 197 Source Mode Equipment Setup. Set up the equipment as shown in the following illustration and set controls as described. 371B 371B Settings: Initialize the 371B, then set the following control as indicated. STEP GENERATOR NUMBER OF STEPS STEP/OFFSET AMPLITUDE 100 mA...
Page 198: Figure 5–23: Setup For Determining Cursor Measurement Variation
Performance Verification 1. Connect long patch cords between the Calibration Fixture and the voltage source as shown in Figure 5–23. 371B Calibration Fixture Figure 5-23: Setup for determining cursor measurement variation 2. Apply 0.750 V from the voltage source. 3. Note the reading of the horizontal CURSOR readout.
Page 199: Figure 5–24: Setup For Measuring Maximum Pulse Amplitude Accuracy
14. Press the step generator INVERT button to reverse step polarity. 15. Repeat Steps 8 through 12. 16. Compare the calculated value of PULSE AMPLITUDE with the LIMIT VALUE (–1957 to –2043 mA). 17. Disconnect the patch cords. 18. Initialize the 371B. 5-97 371B Service Manual...
Page 200 Mode Equipment Setup. Set up the equipment as shown in the following illustration and set controls as described. 371B 371B Settings: Initialize the 371B, then set the following control as indicated. COLLECTOR SUPPLY PEAK POWER WATTS 30 W DISPLAY HORIZONTAL...
Page 201 Equipment Setup. Set up the equipment as shown in the following illustration and set controls as described. 371B 371B Settings: Initialize the 371B, then set the following control as indicated. COLLECTOR SUPPLY PEAK POWER WATTS 30 W STEP GENERATOR...
Page 202: Figure 5–25: Setup For Checking Ripple And Pulse Noise
Figure 5-25: Setup for checking ripple and pulse noise 4. Close the protective cover. 5. CHECK that the ripple pulse noise is less than 20 mVp-p. 6. Disconnect the X1 probe and the patch cords. 7. Initialize the 371B. 5-100 371B Service Manual...
Page 203: Collector Supply
Mode DC Voltage Removing the Shield Panel and Connecting the Meter. 1. Change the following 371B setting: POWER 2. Remove the shield panel on the A6 Collector Supply board. 3. Connect the positive lead of the digital multimeter to J62 pin 1 on the A6 Collector Supply Output board and the negative lead to ground.
Page 204 Output board for a digital multimeter reading of 0 V"1.00 mV. Disconnecting the Meter and Replacing the Shield Panel. 7. Change the following 371B setting: POWER 8. Disconnect the digital multimeter from the 371B. 9. Replace the shield panel. 10. Change the following 371B setting: POWER...
Page 205 Voltage (A6R401) Equipment Setup. Set up the equipment as shown in the following illustration and set controls as described. 371B 371B Settings: Initialize the 371B, then set the following control as indicated COLLECTOR SUPPLY PEAK POWER WATTS 30 W HIGH VOLTAGE...
Page 206 Performance Verification 5. EXAMINE the display for a horizontal CURSOR readout between 3000 V and 3300 V. 6. Change the following 371B setting: COLLECTOR SUPPLY PEAK POWER WATTS 300 mW 7. EXAMINE the display for a horizontal CURSOR readout between 300 V and 345 V.
Page 207 Performance Verification Determining Whether Further Adjustment is Necessary. 12. Repeat Steps 3 to 8 to determine whether further adjustment is necessary. Removing the Setup. 13. Change the following 371B setting: COLLECTOR SUPPLY HIGH VOLTAGE DISABLED 5-105 371B Service Manual...
Page 208 H Rise and Fall time are between 40 and 120 ms with collector supply VARIABLE set at 50 %. Equipment Setup. Set up the equipment as shown in the following illustration and set controls as described. 371B 371B Settings: Initialize the 371B Test Equipment Settings: TEST OSCILLOSCOPE COUPLING VERTICAL 5 V/Div...
Page 209: Figure 5–26: Setup For Checking Pulse Form
Performance Verification 371B Calibration Fixture Figure 5-26: Setup for checking pulse form 2. Close the protective cover and set the HIGH CURRENT breaker to the ENABLED position. 3. Set the collector supply VARIABLE control to 50 %. 4. Set the test oscilloscope time/DIV to 50 ms/DIV.
Page 210: Figure 5–27: Setup For Checking Maximum Peak Current In High Current Mode
400 mA"20% at 30 mW. Equipment Setup. Set up the equipment as shown in the following illustration and set controls as described. 371B 371B Settings: Initialize the 371B, then set the following control as indicated. COLLECTOR SUPPLY PEAK POWER WATTS 3 kW DISPLAY...
Page 211: Figure 5–28: Setup For Checking Maximum Peak Current In High Voltage Mode
12. Set the peak power watts to 3 W. 13. Repeat Step 11. 14. Set the peak power watts to 300 mW. 15. Repeat Step 11. 16. Set the peak power watts to 30 mW. 17. Repeat Step 11. 18. Initialize the 371B. 5-109 371B Service Manual...
Page 212: Table 5–18: Minimum Output Current
Current Output Reading 3 kW 400 A 300 W 40 A 30 W 32 mA to 48 mA 3.2 mA to 4.8 mA 300 mW 3.2 mA to 4.8 mA 30 mW 320 mA to 480 mA 5-110 371B Service Manual...
Page 213 30 mW. Equipment Setup. Set up the equipment as shown in the following illustration and set controls as described. 371B 371B Settings: Initialize the 371B, then set the following control as indicated. COLLECTOR SUPPLY PEAK POWER WATTS 30 mW HIGH VOLTAGE...
Page 214: Table 5–19: Maximum Peak Voltage
7. Set the HIGH CURRENT breaker to the ENABLED position. 8. Set the VARIABLE control to 100 %. 9. CHECK that the value of the horizontal CURSOR readout is set between 28.5 V to 33.0 V. 10. Change the following 371B settings: COLLECTOR SUPPLY POLARITY PEAK POWER WATTS...
Page 215: Test Fixture
Equipment Setup. Set up the equipment as shown in the following illustration and set controls as described. Test Equipment Settings: DIGITAL MULTIMETER Mode OHMS 1. Connect the patch cords as shown in Figure 5–29 on the Test Fixture. 5-113 371B Service Manual...
Page 216: Figure 5–29: Setup For Checking Sense Load Resistance
Performance Verification 371B Test Fixture Figure 5-29: Setup for checking sense load resistance 2. CHECK that the resistance between the COLLECTOR SENSE and #1 is less than 1 W. 3. CHECK that the resistance between the BASE SENSE and #2 is less than 1 W.
Page 217: Figure 5–30: Setup A For Checking Test Fixture Continuity
Test Equipment Settings: DIGITAL MULTIMETER Mode OHMS 1. Connect the patch cords on the Test Fixture as shown in Figure 5–30. 371B Test Fixture Figure 5-30: Setup A for Checking Test Fixture continuity 5-115 371B Service Manual...
Page 218: Figure 5–31: Setup B For Checking Test Fixture Continuity
4. CHECK that the resistance between the EMITTER and #6 is less than 1 W. 5. Connect the patch cords on the Test Fixture as shown in Figure 5–31. 371B Test Fixture Figure 5-31: Setup B for Checking Test Fixture continuity 6.
Page 219: Reconfigure The 371B
2. Disconnect all test equipment from the 371B 3. Install any protective covers/panels removed during the performance check and adjustment procedures. 4. Install the top and side panels to the 371B. The 371B is ready for use. 5-117 371B Service Manual...
Page 220 Performance Verification 5-118 371B Service Manual...
Page 221 Options...
Page 223: Options And Accessories
371B Programmable High Power Curve Tracer comes configured for installation in a 19-inch wide instrument rack. Option D1 A calibration data test result report will be provided with the 371B Program- mable High Power Curve Tracer when this option is specified. Option A9 371B Programmable High Power Curve Tracer comes without the power cord.
Page 224: Accessories
Options and Accessories Accessories Standard Accessories The 371B Programmable High Power Curve Tracer includes the standard accessories listed in Table 6–1: Table 6-1: Standard accessories Accessory Part number User Manual 070 A840 XX Test Fixture 016 A328 00 Test Adapters...
Page 225: Table 6–3: Recommended Accessories
Options and Accessories Recommended The following optional accessories, listed in Table 6–3, are recommended for use Accessories with the instrument: Table 6-3: Recommended accessories Accessory Model number Thermal Printer iDP3240 CBM, Thermal Printer (http://www.jcbm.co.jp) 371B Service Manual...
Page 226 Options and Accessories 371B Service Manual...
Page 227 Electrical Parts List...
Page 229: Replaceable Electrical Parts
The repair of is the exchange of the board fundamentally. This section contains a list of the electrical components for the 371B Program- mable High Power Curve Tracer. Use this list to identify and order replacement parts. Parts Ordering Information Replacement parts are available through your local Tektronix field office or representative.
Page 230: Using The Replaceable Electrical Parts List
670 7918 03 670 7918 XX When you order parts, Tektronix will provide you with the most current part for your product type, serial number, and modification (if applicable). At the time of your order, Tektronix will determine the part number revision level needed for your product, based on the information you provide.
Page 231 City, state, zip code TK0191 SONY/TEKTRONIX 5-9-31 KITASHINAGAWA, TOKYO JAPAN 141-0001 SHINAGAWA-KU, TOKYO 80009 TEKTRONIX INC. 14150 SW KARL BRAUN DR BEAVERTON OR 97077-0001 PO BOX 500 TKOBD TAISHO ELECTRIC IND CO LTD 5-28- 16 OKUSAWA TOKYO JAPAN SETAGAYA- KU 371B Service Manual...
Page 232 CIRCUIT BD ASSY:COLLECTOR PWR SPLY TK0191 ORDER BY DESC 671-0227-01 CIRCUIT BD ASSY:PRIMARY TK0191 ORDER BY DESC 670-9324-01 CIRCUIT BD ASSY:LAMP(R) 80009 670932401 670-9324-02 CIRCUIT BD ASSY:LAMP(L) 80009 670932402 671-0305-01 CIRCUIT BD ASSY:CONNECTOR 80009 671030501 671-0306-00 CIRCUIT BD ASSY:RELAY 80009 671030600 371B Service Manual...
Page 233 CA ASSY,SP,ELEC:1,22 AWG,3.0 L 80009 174100900 A28W280 174-0313-00 CA ASSY,SP,ELEC:2,26 AWG,30.0 L,RIBBON 80009 174031300 A29W290 174-0312-00 CA ASSY,SP,ELEC:2,26 AWG,22.0 L,RIBBON 80009 174031200 A30W622 174-0991-00 CA ASSY,SP,ELEC:6,26 AWG,23.6 L,RIBBON TK0191 174099100 A30W632 174-0993-00 CA ASSY,SP,ELEC:6,26 AWG,23.6 L,RIBBON TK0191 174099300 371B Service Manual...
Page 234 300484 CABLE ASSY,PWR,:125V,1A.200MM L 80009 161025701 W400 174-0296-00 CA ASSY,SP,ELEC:34,28 AWG,5.5 L,RIBBON 80009 174029600 W410 198-5749-00 WIRE SET,ELEC:371B W/D-SUB 50 CONT,FEMALE 80009 198574900 W610 198-5750-00 WIRE SET,ELEC:371B W/D-SUB 50 CONT,MALE 80009 198575000 W617 174-0989-00 CA ASSY,SP,ELEC:2,26 AWG,15.7 L,RIBBON TK0191 174098900...
Page 235 Diagrams...
Page 237 Circuit Board Interconnections 2 371B Service Manual...
Page 238 371B Service Manual...
Page 239 Circuit Board Interconnections 2 371B Service Manual...
Page 240 371B Service Manual...
Page 241 Test Point & Adjustment Locations 1 371B Service Manual...
Page 242 Test Point & Adjustment Locations 2 371B Service Manual...
Page 243 Test Point & Adjustment Locations 2 371B Service Manual...
Page 244 Test Point & Adjustment Locations 3 371B Service Manual...
Page 245 Troubleshooting Tree 371B Service Manual...
Page 246 8-10 Troubleshooting Tree (Cont.) 371B Service Manual...
Page 247 Troubleshooting Tree (Cont.) 8-11 371B Service Manual...
Page 248 8-12 371B Service Manual...
Page 249 Mechanical Parts List...
Page 251: Mechanical Parts List
Mechanical Parts List This section contains a list of the replaceable modules for the 371B. Use this list to identify and order replacement parts. Parts Ordering Information Replacement parts are available through your local Tektronix field office or representative. Changes to Tektronix instruments are sometimes made to accommodate improved components as they become available and to give you the benefit of the latest circuit improvements.
Page 252: Using The Replaceable Parts List
Module Servicing Modules can be serviced by selecting one of the following three options. Contact your local Tektronix service center or representative for repair assistance. Module Exchange. In some cases you may exchange your module for a reman- ufactured module. These modules cost significantly less than new modules and meet the same factory specifications.
Page 253 KYORITSU PLASTIC IND CO LTD 2739 FURUIKE OHHIRA SHIZUOKA JAPAN NUMAZU-CITY TK0DW MIZUNO MFG CO LTD 592-1 TSUMADA KANAGAWA JAPAN ATSUGI-CITY TK0EV MORI HATSUJO CO LTD 1-1-17 BUNDA TOKYO JAPAN SUMIDA-KU TK0FE NAKANO PERMALLOY CO LTD 5-22-14 HIGASHINAKANO TOKYO JAPAN NAKANO-KU 371B Service Manual...
Page 254 SEASTROM MFG CO INC 701 SONORA AVE ENDALE CA 91201-2431 93907 TEXTRON INC 600 18TH AVE ROCKFORD IL 61108-5181 CAMCAR DIV 99742 PERMACEL TAPE DIV U S HIGHWAY 1 NEW BRUNSWICK NJ 08903 AN AVERY CO P O BOX 671 371B Service Manual...
Page 255 80009 4073890XX (ATTACHING PARTS) 212-0002-XX SCREW,MACHINE:8-32 X 0.25,FLH,STL 0KB01 ORDER BY DESC 212-0004-XX SCREW,MACHINE:8-32 X 0.312,PNH,STL TK0435 ORDER BY DESC (END ATTACHING PARTS) 407-3890-XX BRACKET,SUPPORT:ALUMINUM 80009 4073890XX (ATTACHING PARTS) 212-0002-XX SCREW,MACHINE:8-32 X 0.25,FLH,STL 0KB01 ORDER BY DESC 371B Service Manual...
Page 256 SCREW,MACHINE:4-40 X 0.188,PNH,STL TK0435 ORDER BY DESC (END ATTACHING PARTS) 390-1088-XX CABINET,TOP:ALUMINUM 80009 3901088XX (ATTACHING PARTS) 211-0507-XX SCREW,MACHINE:6-32 X 0.312,PNH,STL TK0435 ORDER BY DESC (END ATTACHING PARTS) 426-2136-XX FRAME SECT,CAB.:REAR,AL 80009 4262136XX 390-0985-XX CABINET SIDE:RIGHT 80009 3900985XX (ATTACHING PARTS) 371B Service Manual...
Page 257 671-0227-01 CKT BOARD ASSY:PRIMARY(A27) TK0191 671022701 342-0827-XX INSULATOR,PLATE:CKT BD,POLYCARBONATE 80009 3420827XX (ATTACHING PARTS) 211-0661-XX SCR,ASSEM WSHR:4-40 X 0.25,PNH,STL TK0435 ORDER BY DESC (END ATTACHING PARTS) 342-0828-XX INSULATOR,PLATE:CKT BD,POLYCARBONATE 80009 3420828XX 129-1187-XX SPACER,POST:43MM L,W/4-40 EXT THD,BRS 80009 1291187XX 371B Service Manual...
Page 258 TK0435 ORDER BY DESC (END ATTACHING PARTS) 196-3098-XX LEAD,ELECTRICAL:18 AWG,7.0 L,5-4 80009 1963098XX (ATTACHING PARTS) 211-0565-XX SCREW,MACHINE:6-32 X 0.250,TRH,STL TK0435 ORDER BY DESC 210-0407-XX NUT,PLAIN,HEX:6-32 X 0.25,BRS 73743 3038-402 (END ATTACHING PARTS) 129-A590-00 SPACER,POST 80009 129A59000 220-A178-00 NUT,PLATE 80009 220A17800 371B Service Manual...
Page 259: Figure 9–1: Cabinet, Rear
Figure 9-1: Cabinet, Rear 371B Service Manual...
Page 260 9-10 371B Service Manual...
Page 261: Figure 9–2: Display, Front
Figure 9-2: Display, Front 9-11 371B Service Manual...
Page 262 9-12 371B Service Manual...
Page 263 (END ATTACHING PARTS) 214-3880-XX CONTACT,SPRING:GROUNDING CRT 80009 2143880XX (ATTACHING PARTS) 211-0661-XX SCR,ASSEM WSHR:4-40 X 0.25,PNH,STL TK0435 ORDER BY DESC (END ATTACHING PARTS) 255-1106-XX PLASTIC CHANNEL:250 X 3.3 X 4.0MM,NYLON 80009 2551106XX 334-6691-XX MARKER,IDENT:MKD DANGER 80009 3346691XX 9-13 371B Service Manual...
Page 264 FILTER,LED DSPL:GRAY,10.8 & 18.3M,PC 80009 3780349XX 351-0887-XX GUIDE,PUSH BTN:MAIN KEY BD,POLYCARBONATE 80009 3510887XX 671-1768-01 CKT BOARD ASSY:SUB KEY(A12) 80009 671176801 (ATTACHING PARTS) 129-1131-XX SPACER,POST:12.7MM L,4-40 THD,BRASS 80009 1291131XX (END ATTACHING PARTS) CKT BOARD ASSY INCLUDES: 129-1128-XX .SPACER,POST:5.1MM,L,POLYCARBONATE 80009 1291128XX 9-14 371B Service Manual...
Page 265 .NUT,PLAIN,HEX:0.25-32 X 0.312,BRS 73743 2X-20319-402 210-0046-XX .WASHER,LOCK:0.261 ID,INTL,0.018 THK,STL 78189 1214-05-00-0541 (END ATTACHING PARTS) 407-3665-XX BRACKET,ANGLE:FRONT PNL MTG,ALUMINUM TK0CA 30-0071 (ATTACHING PARTS) 211-0106-XX SCREW,MACHINE:4-40 X 0.625,FLH,STL TK0435 ORDER BY DESC (END ATTACHING PARTS) 386-A846-00 SUB PANEL 80009 386A84600 9-15 371B Service Manual...
Page 266 PAD,CUSHIONING:150MM X 12MM X 13MM TK019 3481048XX 671-B126-01 CKT BOARD ASSY:CPU(A2) 80009 671106401 (ATTACHING PARTS) 671-0235-08 CKT BOARD ASSY:A/D(A3) 80009 671023508 (ATTACHING PARTS) 670-9306-04 CKT BOARD ASSY:DIGITAL DSPLY(A4)(ATTACHING PARTS) 80009 670930604 670-9307-04 CKT BOARD ASSY:DISPLAY CONT(A5) (ATTACHING PARTS) 80009 670930704 9-16 371B Service Manual...
Page 267: Figure 9–3: Chassis, Ciircuit Board
Figure 9-3: Chassis, Ciircuit Board 9-17 371B Service Manual...
Page 268 9-18 371B Service Manual...
Page 269: Figure 9–4: Power Supply
Figure 9-4: Power Supply 9-19 371B Service Manual...
Page 270 9-20 371B Service Manual...
Page 271 (ATTACHING PARTS) 212-0507-XX SCREW,MACHINE:10-32 X 0.375,PNH,STL TK0435 ORDER BY DESC 211-0507-XX SCREW,MACHINE:6-32 X 0.312,PNH,STL TK0435 ORDER BY DESC 212-0507-XX SCREW,MACHINE:10-32 X 0.375,PNH,STL TK0435 ORDER BY DESC (END ATTACHING PARTS) 120-1755-01 XFMR,PWR,STU:CMOS,CLK GEN & READY INTFC:(T200) TK019 120175501 9-21 371B Service Manual...
Page 272 PLATE,CONN MTG:FEMALE,STEEL 80009 3865485XX (ATTACHING PARTS) 211-0507-XX SCREW,MACHINE:6-32 X 0.312,PNH,STL TK0435 ORDER BY DESC (END ATTACHING PARTS) 198-5749-00 WIRE SET,ELEC:371B W/D-SUB 50 80009 198574900 CONT,FEMALE:(W410),(ATTACHING PARTS) 211-0661-XX SCR,ASSEM WSHR:4-40 X 0.25,PNH,STL TK0435 ORDER BY DESC (END ATTACHING PARTS) 386-5909-XX PLATE,CONN MTG:FEMALE,STEEL...
Page 273 (ATTACHING PARTS) 211-0105-XX SCREW,MACHINE:4-40 X 0.188,FLH,STL TK019 2110105XX (END ATTACHING PARTS) 136-0933-XX SOCKET,PIN TERM:0.16 DIA,GRAY TK0BW SLB4-F6.3-8 136-0934-XX SOCKET,PIN TERM:0.16 DIA,RED TK0BW SLB4-F6.3-1 342-0852-XX INSULATOR,BSHG:15MM OD X 11.3MM L,PC TK019 3420852XX 334-A582-00 MARKER,IDENT:MARKED I/O SIGNALS TK0AU 30-0218 9-23 371B Service Manual...
Page 274 GUIDE,SW ACT AD:INTERLOCK TK019 3510823XX (ATTACHING PARTS) 210-0586-XX NUT,PL,ASSEM WA:4-40 X 0.25,STL TK0435 ORDER BY DESC (END ATTACHING PARTS) 333-A441-00 PANEL,FRONT:371B TEST FXTR,ALUMINUM 80009 3333576XX (ATTACHING PARTS) 211-0101-XX SCREW,MACHINE:4-40 X 0.25,FLH,100 DEG,STL TK0435 ORDER BY DESC 211-0101-XX SCREW,MACHINE:4-40 X 0.25,FLH,100 DEG,STL...
Page 275 .NUT,PLAIN,HEX:M3 X 5.5MM,STL TK0BJ 30-0614 210-1459-XX .WASHER,PLAIN:3.2MM ID X 0.5MM THK,STL TK0191 210145900 (END ATTACHING PARTS) 202-0343-XX COVER AND BASE FOR CONNECTING BOX 80009 2020343XX 614-0919-XX ADAPTER PANEL ASSEMBLY 80009 6140919XX (CONTAINS FIGURE 5-2 THROUGH FIGURE 5 13) 9-25 371B Service Manual...
Page 276 Mechanical Parts List 9-26 371B Service Manual...
Page 277: Figure 9–5: Test Fixture
Figure 9-5: Test Fixture REV MAR 96 9-27 371B Service Manual...
Page 278 9-28 371B Service Manual...
Page 279: Figure 9–6: Front Porch
Figure 9-6: Front Porch 9-29 371B Service Manual...
Page 280 9-30 371B Service Manual...
Page 281 NUT,PL,ASSEM WA:6-32 X 0.312,STL TK0435 ORDER BY DESC (END ATTACHING PARTS) 426-2331-XX FRAME:POLYCARBONATE 80009 4262331XX 333-3887-XX PANEL,FRONT:FDD,POLYCARBONATE 80009 3333887XX 122-0184-XX ANGLE,RAIL:SUBPANEL MTG,RIGHT 80009 1220184XX (ATTACHING PARTS) 211-0038-XX SCREW,MACHINE:4-40 X 0.312,FLH,STL TK0435 ORDER BY DESC (END ATTACHING PARTS) 9-31 371B Service Manual...
Page 282 NUT,PLAIN,HEX:0.25-28 X 0.375,BRS 73743 3089-402 210-0046-XX WASHER,LOCK:0.261 ID,INTL,0.018 THK,STL 78189 1214-05-00-0541 (END ATTACHING PARTS) 333-3514-XX PANEL,FRONT:371B,PWR SW 80009 3333514XX 426-2213-XX SUBPANEL,FRONT:PWR SW TK019 4262213XX (ATTACHING PARTS) 210-0586-XX NUT,PL,ASSEM WA:4-40 X 0.25,STL TK0435 ORDER BY DESC (END ATTACHING PARTS) 9-32 371B Service Manual...
Page 283 SCREW,MACHINE:6-32 X 0.312,PNH,STL TK0435 ORDER BY DESC (END ATTACHING PARTS) 151-0896-00 TRANSISTOR:(Q902) TK00L MG100H1BS1 (ATTACHING PARTS) 211-0507-XX SCREW,MACHINE:6-32 X 0.312,PNH,STL TK0435 ORDER BY DESC 210-0803-XX 300000 300401 WASHER,FLAT:0.15 ID X 0.375 OD X 0.032,STL 12327 ORDER BY DESC 9-33 371B Service Manual...
Page 284 NUT BLOCK:4-40 X 0.282,NI SIL TK0914 ORDER BY DESC (ATTACHING PARTS) 211-0105-XX SCREW,MACHINE:4-40 X 0.188,FLH,STL TK0435 MACHINE SCREW (END ATTACHING PARTS) 343-1287-XX CLAMP,CABLE:8.4MM ID,NYLON 80009 3431287XX (ATTACHING PARTS) 210-0407-XX NUT,PLAIN,HEX:6-32 X 0.25,BRS 73743 3038-402 (END ATTACHING PARTS) 9-34 371B Service Manual...
Page 285 Serial no. Mfr. index number effective discont'd Name & description code Mfr. part number number 198-5750-00 WIRE SET,ELEC:371B W/D-SUB 50 CONT,MALE:(W610) 80009 198575000 (ATTACHING PARTS) 211-0661-XX SCR,ASSEM WSHR:4-40 X 0.25,PNH,STL TK0435 ORDER BY DESC (END ATTACHING PARTS) 386-5917-XX PLATE,CONN MTG:STEEL 80009...
Page 286 (ATTACHING PARTS) 211-0538-XX SCREW,MACHINE:6-32 X 0.312,FLH,STL TK0435 ORDER BY DESC (END ATTACHING PARTS) 337-3479-XX SHIELD,CRT:LOWER TK0FE 30-0004 (ATTACHING PARTS) 211-0661-XX SCR,ASSEM WSHR:4-40 X 0.25,PNH,STL TK0435 ORDER BY DESC (END ATTACHING PARTS) 342-0846-XX INSULATOR,PLATE:CIRCUIT BREAKER,PC TK0CP 30-0079 9-36 371B Service Manual...
Page 287: Figure 9–7: Drawer Chassis
Figure 9-7: Drawer Chassis 9-37 371B Service Manual...
Page 288 9-38 371B Service Manual...
Page 289: Figure 9–8: Accessories
Figure 9-8: Accessories 9-39 371B Service Manual...
Page 290 9-40 371B Service Manual...
Page 291 161-0304-00 CABLE ASSY,PWR,:3 X 1.0MM SQ,250V/10A, 2.5 METER (OPTION AC ONLY) OPTIONAL ACCESSORIES 070-A843-50 SERVICE MANUAL,371B 80009 070A843XX ----------- A1001,TEST ADAPTER:(BLANK ADAPTER) ----------- A1005,TEST ADAPTER:(AXIAL ADAPTER) 012-0991-00 GPIB CABLE :2m 016-0930-00 RACK MOUNT KIT K475 CART 9-41 371B Service Manual...
Page 292 Mechanical Parts List 9-42 371B Service Manual...

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