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Agilent Technologies 4339B, Руководство по обслуживанию

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Replaceable

Mechanical

P

arts

List

The

replaceable

mechanical

parts

are

listed

in

T

able

3-4

to

T

able

3-7 .

T

able

3-4.

Replaceable

Mechanical

P

arts

List

1

Reference

Designation

Agilent

P

art

Number

Qty

.

Description

1

04339-04004

1

Cover

0363-0125

30

mm

2

2

Gasket

2

5041-9167

4

F

oot

1460-1345

2

Tilt

Stand

3

04339-65020

1

Front

P

anel

Assembly

1

4

5041-9170

2

Trim

Side

0515-0914

4

Screw

M3

(Hidden)

5

04263-40001

1

Front

Bezel

2

6

04339-00605

1

Sub

P

anel

(Hidden)

2

0515-0914

4

Screw

M3

(Hidden)

2

7

1250-2317

1

HV

BNC

Connector

2

3

0360-1190

1

Lug

T

erminal

(Hidden)

2

8

1250-2317

1

HV

BNC

Connector

2

3

9

1250-2317

1

HV

BNC

Connector

2

3

0360-1190

1

Lug

T

erminal

(Hidden)

2

10

1250-2228

1

Triaxial

Connector

2

3

11

1252-1419

1

Connector

6

pin

2

4

5

04339-01204

1

Lug

T

erminal

(Hidden)

2

04339-24009

1

Nut

(Hidden)

2

12

04339-87122

1

P

anel

Label

2

1

The

assembly

consists

of

the

parts

designated

by

5

through

12

and

cables

connected

to

the

all

connectors

on

the

front

panel.

2

This

part

is

included

in

the

Front

P

anel

Assembly

,

3.

3

Includes

washer

and

nut

4

Includes

washer

5

Furnished

nut

cannot

be

used

Assembly

Replacement

3-5

Содержание 4339B

Страница 1: ...is manual applies directly to instruments with serial number pre x JP1KD For additional important information about serial numbers read Instruments Covered by This Manual in Chapter 1 of this manual Agilent Part No 04339 90043 Printed in JAPAN March 2001 Fourth Edition ...

Страница 2: ...copyright All rights are reserved No part of this document may be photocopied reproduced or translated to another language without the prior written consent of the Agilent Technologies Agilent Technologies Japan Ltd Component Test PGU Kobe 1 3 2 Murotani Nishi ku Kobe shi Hyogo 651 2241 Japan c Copyright Agilent Technologies Japan Ltd 1996 1999 2000 2001 ...

Страница 3: ...Manual Printing History August 1996 First Edition July 1999 Second Edition part number 04339 90043 June 2000 Third Edition part number 04339 90043 March 2001 Fourth Edition part number 04339 90043 iii ...

Страница 4: ...rth blade DO NOT Operate In An Explosive Atmosphere Do not operate the instrument in the presence of ammable gasses or fumes Operation of any electrical instrument in such an environment constitutes a de nite safety hazard Keep Away From Live Circuits Operating personnel must not remove instrument covers Component replacement and internal adjustments must be made by quali ed maintenance personnel ...

Страница 5: ...de potentially dangerous procedures throughout this manual Instructions contained in the warnings must be followed Warning Dangerous voltages capable of causing death are present in this instrument Use extreme caution when handling testing and adjusting this instrument v ...

Страница 6: ...ice facility designated by Agilent Technologies Buyer shall prepay shipping charges to Agilent Technologies and Agilent Technologies shall pay shipping charges to return the product to Buyer However Buyer shall pay all shipping charges duties and taxes for products returned to Agilent Technologies from another country Agilent Technologies warrants that its software and rmware designated by Agilent...

Страница 7: ... incidental or consequential damages whether based on contract tort or any other legal theory Assistance Product maintenance agreements and other customer assistance agreements are available for Agilent Technologies products For any assistance contact your nearest Agilent Technologies Sales and Service O ce Addresses are provided at the back of this manual vii ...

Страница 8: ...ion sign denotes a hazard It calls attention to a procedure practice condition or the like which if not correctly performed or adhered to could result in damage to or destruction of part or all of the product Note denotes important information It calls attention to a procedure practice condition or the like which is essential to highlight A xed to product containing static sensitive devices use an...

Страница 9: ...2 Adjustments Chapter 2 describes the adjustments required to ensure that the 4339B is within its published speci cations after it has been repaired or it fails the performance tests Chapter 3 Assembly Replacement Chapter 3 provides the information on replacing the 4339B assemblies The information includes replaceable assembly lists and removal and installation procedures Chapter 4 Troubleshooting...

Страница 10: ......

Страница 11: ...rocedure References 2 6 Source Voltage Adjustment 2 6 Equipment 2 6 Setup 2 6 Ammeter Adjustment 2 8 Equipment 2 8 Setup 1 2 2 8 Setup 2 2 2 9 3 Assembly Replacement Introduction 3 1 Ordering Information 3 1 Restored Exchange Assemblies 3 1 Replacing the A2 CPU Board Assembly 3 2 Replaceable Assembly List 3 2 Replaceable Mechanical Parts List 3 5 Disassembly Procedures 3 11 Tools and Fasteners 3 1...

Страница 12: ...urce 4 7 Digital Section 4 8 Power Supply Section 4 9 Troubleshooting 4 10 Check Procedure References 4 12 Check 1 DC DC Converter Output Voltage 4 12 Check 2 LCD Displays Anything 4 13 Check 3 LCD Operates Correctly 4 13 Check 4 Any Error Message on LCD 4 13 Check 5 CPU Related Error Message 4 13 Check 6 Ammeter Functionality Check 4 13 Check 7 CPU Power LED Lights 4 14 Check 8 Any Error Code on ...

Страница 13: ...nce 4 14 4 11 Location of High Lead of A2F1 Fuse 4 15 4 12 Test Pad Locations 4 16 4 13 DC DC Converter Output Connector 4 17 4 14 Transformer Secondary Voltage Check 4 18 B 1 Jumper and Switch Settings B 1 Tables 1 1 Required Equipment 1 2 1 2 Required Language Extensions 1 2 2 1 Related Adjustments 2 2 2 2 V Measurement Adapter Switch Settings 2 7 3 1 Replaceable Major Assembly List 3 3 3 2 A2 C...

Страница 14: ......

Страница 15: ...d by a yellow Manual Changes supplement or have a di erent manual part number This sheet contains change information that explains how to adapt the manual to the newer instrument In addition to change information the supplement may contain information for correcting errors Errata in the manual To keep this manual as current and accurate as possible Agilent Technologies recommends that you periodic...

Страница 16: ...1 A Cable Banana Banana Jumper Dual Banana BNC m Cable 11058A Agilent PN 11001 60001 1 A RC Box Adapter No Substitute Agilent PN 04339 65005 1 A V Measurement Adapter No Substitute Agilent PN 04339 65006 1 A Shunt Connector No Substitute Agilent PN 04339 60003 1 A 1 Adjustment 2 Troubleshooting 3 Excluding the 9826A Note Because the 3458A is the only multimeter available which satis es the require...

Страница 17: ...justments Safety Consideration This chapter contains NOTEs CAUTIONs and WARNINGs which must be followed to ensure operator safety and to maintain the instrument in a safe and serviceable condition The adjustments covered in this chapter should be performed only by a quali ed person who is aware of the hazards Warning Any interruption of the protective ground conductor inside or outside the instrum...

Страница 18: ...t Switch There are no EEPROM write protect switches in the 4339B Related Adjustments There are two adjustments for the 4339B Table 2 1 lists the adjustments that must be performed if an assembly has been replaced Table 2 1 Related Adjustments Assembly Replaced Required Adjustment A1 Main Board Assembly All adjustments A2 CPU Board Assy without ROM None1 A3 Ammeter Board Assembly Ammeter Adjustment...

Страница 19: ... dependent le on the disk Figure 2 1 Adjustment Program Flow INITIAL SETUP de nes the standards calibration values Update the calibration values as necessary Source Voltage Adjustment obtains the data to adjust the actual source output voltage equal to the set value This adjustment should be performed if the performance test Source Voltage Accuracy Test fails Ammeter Adjustment obtains two kinds o...

Страница 20: ...ion 1 Turn on the computer and bring up the BASIC system 2 Set the Mass Storage Unit Speci er to the drive directory where the adjustment program exists using the MSI command 3 Load the TE_A4339B le from the adjustment program disk by pressing LOAD TE_A4339B 4Return5 or 4Enter5 4 Run the loaded program by pressing RUN 5 As the program instructs enter the default GPIB address of the Multimeter Note...

Страница 21: ...performed follow right after EEPROM replacement change switch A2SW1 1 to CLOSE so that the 4339B will ignore the self test errors at power on Return the switch to the OPEN position when the adjustments have been completed Refer to Figure B 1 for the switch location Adjustments 2 5 ...

Страница 22: ... source adjustment data stored in the EEPROM Equipment Multimeter 3458A Banana Banana Jumper 11058A V Measurement Adapter Agilent PN 04339 65006 Shunt Connector Agilent PN 04339 60003 Warning To avoid the electrical shock hazard by eventual touch use only the 11058A for connection Each of the jumper s banana plug conductor is equipped with an retractive protective sleeve Setup This setup obtains t...

Страница 23: ...nana Jumper 3 Set the V Measurement Adapter s switches as follows Table 2 2 V Measurement Adapter Switch Settings ID Output 1 2 3 4 0 1 0 1 Disable 4 Connect the Shunt Connector directly to the 4339B s Ground and Guard connectors 5 Connect the V Measurement Adapter s Output cable to the 4339B Output connector 6 Connect the V Measurement Adapter s Interlock cable to the 4339B Interlock connector 7 ...

Страница 24: ...04339 65005 Setup 1 2 This setup obtains the voltage source output resistance and the ammeter scaling factors Figure 2 3 Ammeter Adjustment Setup 1 2 Perform the following steps as the program instructs 1 Connect the RC Box Adapter s Input cable to the 4339B Input connector 2 Connect the RC Box Adapter s Output cable to the 4339B Output connector 3 Connect the RC Box Adapter s Interlock cable to t...

Страница 25: ...aution To prevent electrostatic noise which may cause error in the adjustment data do not move the RC Box Adapter cables while the 4339B is in measurement Setup 2 2 This setup obtains the ammeter input resistance Figure 2 4 Ammeter Adjustment Setup 2 2 Perform the following steps as the program instructs 1 Disconnect the Dual Banana BNC m cable from the RC Box Adapter s Monitor H connector 2 Conne...

Страница 26: ......

Страница 27: ... model number complete instrument serial number the description and function of the part and the quantity of parts required Address the order to the nearest Agilent Technologies o ce Restored Exchange Assemblies Some replacement assemblies are available as either new or restored assemblies The restored assembly is more economical than a new assembly and as with new assemblies a 90 day warranty app...

Страница 28: ...w assembly as long as the ROM and EEPROM are not defective The ROM transfer reduces parts cost for the repair and the EEPROM transfer saves time from readjusting the 4339B For this purpose the A2 assembly can only be ordered without the ROM When the A2 assembly is replaced make sure that the jumpers and switches on the A2 assembly are in the default position as shown in Appendix B Replaceable Asse...

Страница 29: ...Board Assembly w o ROM 04263 00604 1 Case Shield1 0515 1550 4 Screw M3 04339 00612 1 Insulator 0460 0616 70 mm Adhesive Tape for Insulator 6 04339 66504 1 A4 Keyboard Assembly 04339 25151 1 Rubber Key 0515 1550 1 Screw M3 7 04263 61010 1 LCD 04263 25003 1 Filter Transparent 0515 1550 2 Screw M3 8 04339 66503 1 A3 Ammeter Board Assembly 04339 69503 A3 Ammeter Board Assembly Exchange Assembly 92 042...

Страница 30: ... Rev 1 04 Table 3 3 Replaceable Assembly List Reference Designation Agilent Part Number Qty Description A1C500 0180 4334 1 Capacitor 22000 F for power supply A1C501 0180 4334 1 Capacitor 22000 F for power supply A3C500 0180 4334 1 Capacitor 22000 F A5SW1 3101 3173 1 Line Switch A5SW2 3101 3156 1 Voltage Selection Switch A5VR1 0837 0237 1 Varistor A5VR2 0837 0237 1 Varistor 3 4 Assembly Replacement...

Страница 31: ...n 2 0515 0914 4 Screw M3 Hidden 2 7 1250 2317 1 HV BNC Connector 23 0360 1190 1 Lug T erminal Hidden 2 8 1250 2317 1 HV BNC Connector 23 9 1250 2317 1 HV BNC Connector 23 0360 1190 1 Lug T erminal Hidden 2 10 1250 2228 1 Triaxial Connector 23 11 1252 1419 1 Connector 6 pin 245 04339 01204 1 Lug T erminal Hidden 2 04339 24009 1 Nut Hidden 2 12 04339 87122 1 Panel Label 2 1 The assembly consists of ...

Страница 32: ...ion 1 04339 61697 1 GPIB Connector with atcable1 2 0515 1551 2 Screw M3 3 2110 0565 1 Fuse Holder 2110 0202 1 Fuse 0 25 A Slow Blow 230V 2110 0201 Fuse 0 5 A Slow Blow 115V 4 04339 00103 1 Chassis 5 2190 0054 1 Washer 2950 0054 1 Nut 1 Includes two sets of screw washer and nut 3 6 Assembly Replacement ...

Страница 33: ... M4 7 04263 00607 1 Plate Shield 8 0515 01550 4 Screw M3 for A5 9 0515 2079 1 Screw M4 on the Chassis 10 04263 24002 2 Nut Rod for DC DC Conv 2190 0584 2 Washer Spring M3 11 0515 1550 7 Screw M3 for A1 and A2 04339 24006 4 Stando Hidden for A1 12 04339 00612 1 Insulator Hidden 0460 0616 120 mm 2 2 Adhesive Tape for Insulator 13 1400 0866 1 Cable Clamp 14 5040 3347 2 Plate Hidden Chassis Reverse si...

Страница 34: ...5 4 Cable Assy Optical 4 04339 61614 1 Wire Assy Binding Post 5 04339 61606 1 Wire Assy Black1 0890 1806 20 mm Tube Heat Shrink 6 04339 61612 1 Wire Assy Red1 0890 1480 15 mm Tube Heat Shrink 0890 1806 20 mm Tube Heat Shrink 7 04339 61613 1 Wire Assy 8 04339 61616 1 Wire Assy 0890 0311 15 mm Tube Heat Shrink 0890 1806 20 mm Tube Heat Shrink 9 04263 61611 1 Wire Assy 10 04339 61615 1 Wire Assy 0890...

Страница 35: ...hanical Parts List 5 Reference Designation Agilent Part Number Qty Description 1 0160 7457 1 Capacitor 2200 pF 1 6 kV 2 1901 1250 2 Diode 3 04339 24013 1 Stick 4 04339 25008 1 Stud 0515 0914 1 Screw M3 Assembly Replacement 3 9 ...

Страница 36: ...4339 40003 1 Housing1 2 04339 40004 1 Housing with Nut1 0515 1550 1 Screw M31 3050 0891 1 Washer1 3 04339 61651 1 Cable Assembly1 4 04339 60003 1 Shunt Connector2 1 This part is included in the Shunt Connector Assembly 4 2 This assembly consists of the part designated by 1 through 3 3 10 Assembly Replacement ...

Страница 37: ...339B may appear to be Phillips type but they are in fact Pozidrive type To avoid damaging them use only pozidrive screwdrivers to remove or tighten pozidrive type fasteners Cover Removal The following procedure is common for gaining access to any of the assemblies Figure 3 1 Cover Removal 1 Remove the two screws which fasten the cover to the chassis s rear panel 2 Slide the cover toward rear while...

Страница 38: ...he shield case which surrounds the A3 board 6 Remove the nut which fastens the Ext Trigger connector on the rear panel 7 Remove the screw which secures the A1 board to the chassis side 8 Remove the four studs that secure the A1 assembly to the chassis by rotating the studs with a at bladed screwdriver 9 Remove the three screws that secure the A1 assembly to the chassis 10 Remove the A1 assembly fr...

Страница 39: ...n connector cable assembly from the A5 board 3 Remove the screw which xes the green and yellow wire connected to the neutral terminal of the power cable connector to the bottom of the chassis 4 Remove the four screws that secure the A5 board to the chassis 5 Remove the A5 board from the chassis Keyboard Assembly Removal Removal Procedure 1 Remove the cover while referring to Cover Removal 2 Discon...

Страница 40: ... Cover Removal 2 Disconnect the two atcable assemblies and the wire assembly from the front side of the A2 board 3 Remove the screw which fastens the cable assembly on the front side of the A3 Ammeter Board Assembly 4 Remove the screws which fastens the cable assembly on the left front side of the chassis 5 Remove the side trim label from both sides of the front bezel 6 Remove four screws that sec...

Страница 41: ...sis 5 Remove the side trim label from both sides of the front bezel 6 Remove the four screws that secure the front panel bezel to the chassis from both sides 7 Place the front panel assembly so that the front panel faces down 8 Disconnect the cable assembly which includes a core from the front side of the A3 Ammeter board assembly 9 Remove the core holder which holds the cable assembly disconnecte...

Страница 42: ...l 2 Disconnect the two atcable assemblies and the wire assembly from the front side of the A2 board 3 Remove the screw which fastens the cable assembly on the front side of the A3 Ammeter Board Assembly 4 Remove the screws which fastens the cable assembly on the left front side of the chassis 5 Remove the side trim label from both sides of the front bezel 6 Remove the four screws that secure the f...

Страница 43: ...is supplied to the instrument and its protective covers are removed This type of servicing must be performed only by service trained personnel who are aware of the hazards involved for example re and electrical shock When serving can be performed without power applied to the instrument remove power from the instrument Before any repair is completed ensure that all safety features are intact and fu...

Страница 44: ...t for any signs of abnormal internally generated heat such as discolored printed circuit boards and components damaged insulation or evidence of arcing Determine the cause and repair 2 Use an ohmmeter which can accurately measure 0 1 to check the resistance from the instrument enclosure to the power cord s ground pin The resistance must be less than 0 1 Flex the power cord while making this measur...

Страница 45: ...ce Meter is essentially a set of a voltage source and a very sensitive current meter Note In practice ammeter input resistance r which is approximately 1 k decreases the current owing through the DUT The actual current I owing through the DUT R is expressed by I V R r In the current measurement mode the 4339B displays the actual current I for the measurement result For example if R 100 k and V 1 V...

Страница 46: ...set from the keyboard or by an GPIB command The I V converter which is directly connected to the input converts the current owing into to a voltage ramp of which slope is proportional to the input current The CPU calculates the current from the voltage ramp slope then calculates the DUT resistance by dividing the source voltage by the current 4 4 T roubleshooting ...

Страница 47: ...curacy The current ows into the I V Converter in the ammeter section via the contact check transformer As discussed in I V Converter the I V Converter converts current owing into to voltage ramp The normalization ampli er enhances the number of measurement range and of measurement speed selection with fewer range capacitors The I V converter output voltage slope which is proportional to the conver...

Страница 48: ...nge Figure 4 4 shows the DC Voltage Source Section block diagram Figure 4 4 DC Voltage Source Section Block Diagram The Main Ampli er ampli es the reference voltage generated by DAC 1 so that the output voltage is between 0 V and 1 000 V The Pre regulator supplies a voltage to the Main Ampli er The Pre regulator voltage varies according to the output voltage in order to minimize energy consumption...

Страница 49: ...tor the current charges capacitor C As a result the integrator outputs a negative going ramp of which slope is 0Ix C The current Ix can be obtained by 0C 1v 1t where 1t is a certain time interval and 1v is the output voltage drop for this interval Capacitor C which is called range capacitor determines the applicable measurement range in a practical integrator Reference Current Source The Reference...

Страница 50: ... interface on the A2 Assembly allows the 4339B communicate with a controller The handler interface on the A1 Assembly allows the 4339B communicate with an external handler Note Because of required high dc isolation between the A3 Assembly and other assemblies the A3 Assembly communicates with other assemblies via optical bers The A2 CPU Board Assembly includes a processor ROM EEPROM jumpers switch...

Страница 51: ...he line power VR2 blows the fuse F1 if the 4339B is turned on with wrong line voltage setting selection for example 115V selection when using 230 V line voltage Note Because very high dc isolation is required between A3 Ammeter assembly and the other assemblies the 4339B has two independent dc voltage supply systems Both of the transformer secondary voltages are approximately 14 V One of the ac vo...

Страница 52: ...efer to the Check Procedure References for detailed procedure to check each item Refer to Chapter 3 for assembly replacement Note Because of each assembly s high SMD surface mount device ratio the repair should be done by assembly replacement The troubleshooting procedure therefore only isolates the defective assembly 4 10 T roubleshooting ...

Страница 53: ...Figure 4 8 Troubleshooting Flow T roubleshooting 4 11 ...

Страница 54: ...Using a multimeter check to see if the voltages between the test pads TPs shown in Figure 4 9 on A1 Main Board Assembly are in the ranges listed in Table 4 1 4 If passed proceed to Check 2 LCD Displays Anything otherwise proceed to Check 10 Fuse and Line Switch Figure 4 9 DC DC Converter Output Voltage Check Table 4 1 DC DC Converter Output Voltages Connected Test Pad Test Pad 0 Range 9 5 8 GND 5 ...

Страница 55: ... Check 4 Any Error Message on LCD 1 Turn o the 4339B 2 Turn on the 4339B while watching the LCD 3 Check if the LCD displays any error message 4 If an error has NOT occurred replace the A1 Main Board Assembly otherwise proceed to Check 5 CPU Related Error Message Check 5 CPU Related Error Message 1 If the error message is one of the following replace the A2 CPU Board Assembly otherwise proceed to C...

Страница 56: ... 4339B 2 Turn on the 4339B while watching the LEDs on the A2 CPU Board Assembly 3 Check if the LEDs light as the sequence shown in Figure 4 10 4 If LEDs light as the sequence replace the LCD Assembly otherwise possibly HALT doesn t light or BERR lights replace the A2 CPU Board Assembly Note When replacing the A2 CPU Board Assembly refer to Replacing the A2 CPU Board Assembly in Chapter 3 for handl...

Страница 57: ...y is most suspicious Replacing only the fuse may x the problem Note When replacing the A2 CPU Board Assembly refer to Replacing the A2 CPU Board Assembly in Chapter 3 for handling the ROM and EEPROM on the A2 Assembly Figure 4 11 Location of High Lead of A2F1 Fuse Check 10 Fuse and Line Switch 1 Check that the fuse on the 4339B rear panel is not blown 2 Check that the line switch on the A5 AC Inle...

Страница 58: ...C Converter input voltage on A1 Assembly is between 12 V and 15 Vdc Refer to Figure 4 12 for the test pad locations 3 If the voltage is in the range proceed to the Check 12 DC DC Converter Open Output Voltages otherwise proceed to the Check 13 Transformer Secondary Voltage Figure 4 12 Test Pad Locations 4 16 T roubleshooting ...

Страница 59: ...meter check if the DC DC Converter open output voltages on the output connector pins shown in Figure 4 13 are in the ranges shown in Table 4 2 5 If passed replace the A1 Main Board Assembly otherwise replace the DC DC Converter Assembly Figure 4 13 DC DC Converter Output Connector Table 4 2 DC DC Converter Open Output Voltages Pin Pin 0 Voltage Range 1 2 5 1 60 2 V 4 3 12 60 6 V 5 3 012 60 6 V T r...

Страница 60: ...Main Board Assembly Refer to Figure 4 14 for the connector location 3 Turn the 4339B on 4 Using a multimeter check if the transformer secondary voltage is between 13 V and 17 Vac 5 If passed replace the A1 Main Board Assembly otherwise replace the transformer assembly Figure 4 14 Transformer Secondary Voltage Check 4 18 T roubleshooting ...

Страница 61: ...s serial number Instruments manufactured after the printing of this manual may be di erent from those documented in this manual Later instrument versions will be documented in a manual changes supplement that will accompany the manual shipped with that instrument If your instrument serial number is not listed on the title page of this manual or in Table A 1 it may be documented in a yellow MANUAL ...

Страница 62: ......

Страница 63: ... Assembly Use this information when replacing the A2 Assembly Jumper and Switch Settings Figure B 1 shows the default Jumper and Switch Settings When the A2 CPU Board Assembly is replaced set the jumpers and switches to the default side as shown in the gure Figure B 1 Jumper and Switch Settings Default Jumper and Switch Settings B 1 ...

Страница 64: ......

Страница 65: ...Protect Switch 2 2 F Factory Selected Components 2 2 G General Information 1 1 H How To Use This Manual ix I Instruments Covered by This Manual 1 1 Interlock Connector Removal 3 14 I V Converter 4 7 K Keyboard Assembly Removal 3 13 L LCD Assembly Removal 3 14 M Manual Changes A 1 O Ordering Information 3 1 Overall Block Diagram 4 4 Overall Measurement Theory 4 3 P Power Supply Section 4 9 Program ...

Страница 66: ......

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