Agilent Technologies 4284A User manual

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MANUAL CHANGES
Change Page Note Reference
Designator
HP
Part Number
Description
1 3-6 ▶A 04284-60001 Inner Frame
4-A7-3 ▶A A7U11 1818-5719 IC CMOS 64K EEPROM
A7U12 1818-5719 IC CMOS 64K EEPROM
A7U23 1818-5719 IC CMOS 64K EEPROM
A7U24 1818-5719 IC CMOS 64K EEPROM
4-A20-2 ▶C A20C1 0180-4403 CAPACITOR-FXD 470UF
Agilent 4284A
Precision LCR Meter
Service Manual
MANUAL IDENTIFICATION
Model Number: 4284A
Date Printed: July 2000
Part Number: 04284-90100
This supplement contains information for correcting manual errors and for adapting the manual to newer instruments that contains
improvements or modifications not documented in the existing manual.
To use this supplement
1. Make all ERRATA corrections
2. Make all appropriate serial-number-related changes listed below
SERIAL PREFIX OR NUMBER
CHANGES
MAKE MANUAL
All 1
<>NewItem
ERRATA
SERIAL PREFIX OR NUMBER MAKE MANUAL
CHANGES
▶: New Item C: Change D: Delete A: Add
NOTE
Manual change supplement are revised as often as necessary to keep manuals as current and accurate as possible. Agilent Technologies
recommends that you periodically request the latest edition of this supplement. Free copies are available from all Agilent Technologies offices.
When requesting copies, quote the manual identification information from your supplement, or the model number and print date from the title
page of the manual.
Date/Div: July 2000/33
Page 1 of 1
PRINTED IN JAPAN
Agilent Technologies

MANUAL CHANGES
2940J01172
and above
1
2848J00388
and above
2
HP 4284A
Precision LCR Meter
MANUAL IDENTIFICATION
Model Number: HP 4284A
Date Printed: January 1989
Part Number: 04284-90100
This supplement contains information for correcting manual errors and for adapting the manual to newer instruments that contain improvements
or modifications not documented in the existing manual.
To use this supplement
1. Make all ERRATA corrections
2. Make all appropriate serial-number-related changes listed below
SERIAL PREFIX OR NUMBER MAKE MANUAL CHANGES SERIAL PREFIX OR NUMBER MAKE MANUAL CHANGES
▶New Item
0- ERRATA
Page 3-3, Figure 3-1. Assembly Identification (1/2):
Exchange the assembly labels A40 and A50.
(In HP 4284A, A40 is on the right of A50)
Page 3-14, Table 3-7. Rear Panel Components:
See Parts Information Table at the end of this supplement.
Page 3-37, Table 3-12. Bit Switch Selected Self Test:
Correct Bit Switch No. 5 setting as shown next.
0
FI_I1
F I2
No.5
NOTE
Manual change supplements are revised as often as necessary to keep manuals as current and accurate as possible. Hewlett-Packard recommends
that you periodically request the latest edition of this supplement. Free copies are available from all HP offices. When requesting copies, quote
the manual identification information from your supplement, or the model number and print date from the title page of the manual.
Date/Div: March 1, 1990/33
Page: 1 of 5
HEWLETT
PACKARD
PRINTED IN JAPAN

▶CHANGE 1
Page 1-A30-4, Table 1-46. A30 Handler Interface Replaceable Parts List:
See the Parts Information Table at the end of this supplement.
Page 1-A30-5, Figure 1-44. A30 Handler Interface Component Locations:
Replace the component locations with Figure 1
Page 1-A30-5, Figure 1-45. A30 Handler Interface Schematic Diagram:
Partially change the schematic diagram as described next.
•Rename Fl to F2.
•Add Fl to the +5V line as shown next.
A16+5VOUT
A17+5VOUT
A18+5VOUT
F1
12
0.5A
+5V
•Replace W1 with J2 and W1 as shown next.
J2
•Replace W2, W3, and W4 with J3 and W2 as shown next.
W2

•Replace W5, W6, and W7 with J4 and W3 as shown next.
+5V
12V
J4 W3
•Replace W8 with J5 and W4 as shown next.
J2
•Replace W9, W10, and W11 with J6 and W5 as shown next.
R25 J6
W5
3

A30J1A Pin No. A30J18
ne
ne
+5v
.5V
.5V
MAW/2
EXT.DCV2
/EXTTRIG
/ENT_ TRIG
/AUi BIN
01/1_0t_IINS
/8189
/BINS
/8187
/8186
/SINS
/8184
/8183
/8182
/8181
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
3
2
1
nc
no
EXT.00V1_CCM
EXT.DCVl_COH
EXT.00Vl_COM
EXT.DCV2COM
EXT.DCV2__CCM
/ECM
/IMOD(
/ALARM
EXT.00V1
EXT.DCVI
no
/KEYLOCK
/UNBAL
no
no
/SREJ
/PLO
/PHI
000
••
•
00
0.0
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
••
'0001
o- CO -eo
0- Z8 -eo t-
o
0
0
0_ 11A -00
0
0_1L12i-p 0
O
0.-0Z1/1-00
0
0-61111-00
0-811b-e0
0
0-1.11111-00
0
0-911/1_00
0
0-S1121-0 0
0
0-/Siti-e)
O
0- Et RI-0 0
O
G- Z11b-0 0
O
-0
•otiti-e 0
0
0-6018-e 0
G-E401)300
O
G-L0111-00
O
0-9011i-e0
0
0-S0111-0
0
coota-eo
O
e-eotti-eo _
0
0
0- 101b-e o
e-elb -0 o
O0 0
0-1.11i 0 0 0 0
0o
G-91)i 0 o 0 0 0
0
0o 0
e-stu -o 0 o o
0.•711i -0 0 0 00o
oO
0
O
Or9 o
0-CI -0 o Q o 0 o
o o
0-Zia -e 0 0 o 0
00 0 0
0-11/1 -0 0 0 0 o
O0 0 o
Ocr, 0 0 o
er.oni -0 0 o 0 0
Oo o 0
0- 613 0 0 0 0 0
Oo ___--._____
0- eb -0 o 0 0 [2:1 0
e",
O0
O0
O0
O0
O0
O0
O0
O2 0
O0
00
0
0
0
0
0-LZU -0
0-9ZU -0
GI-SZU -0
G-'7Z1J -0
0-En
G-ZZU -0
G-1Z8 O0
0
0
G-OZU 0 0 5
O0
0-6W -0 0
Oo113u) 0
••
•
0- La -0 0 0
O0
O0
G-9):1-0 0 00 0
O0 0 o
0- St/ -0 0 0 0 No
O0 0 50
00 0 0 (.9
O0 0 0
0- -0 o ■0
0
0
0
0
0
0
0
0
0
0
0
0
O
0
0
0
G-6Z1:1
000
0-013 -0
0-0E11 -0
0
LL
LL
0
00
00
00
00
00
00
00
00
00
0
00
00
00
00
0
00
5<-00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
0
O0
O0
O03 0
O5 0
O0
O0
O ■
A30N18 Pin No. A3OXIA
LGND
LGND
LGND
+5V
.5V
+5V
.12V
LGND
ne
nc
nc
nc
nc
no
nc
/HANDLER
LGND
D14
012
010
DB
D6
D4
02
00
LGND
/VPA
/RESET
RAJ
/UDS
/KEY_LOCK_INT
nc
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
LGND
LGND
LGND
*5V
+5V
.5V
•12‘./
LGND
nC
ne
no
no
no
no
no
Al
LGND
015
D13
011
D9
D7
05
03
DI
/POW_FAIL
/MA
LGND
/LDS
/HDL_TRG_181
1.040
Figure 1. A30 Handler Interface Component Locations

▶CHANGE 2
Page 4-A7-3, Table 4-A7-2. A7 Digital Control Replaceable Parts Lists (4/4)
Change the version number to 1.11.
See Parts Information Table at the end of this supplement.
CHANGE PAGE Note Reference
Designator
HP
Part Number
Description
ERRATA 3-14 ▶D6 (OPT002) 04284-00210 I/F Plate
04284-61610 Flat Cable Assembly
▶D0515-1551 Screw for Connector
0535-0031 Nut
▶D0515-1550 Screw for Plate
7120-0382 Label
▶A6 (OPT002) 04284-61615 Cable Assembly
11-A40-4 ▶CA30 04278-66532 #201 HANDLER IF
A30F1 2110-0741 FUSE 1A 125V
▶AA30F1 2110-0046 FUSE 0.5A 125V
▶AA30F2 2110-0741 FUSE 1A 125V
A30J2 1251-4822 CONN-POST-TP-HDR
▶AA30J3 1251-8736 CONN-POST-TP-HDR
▶AA30J4 1251-8736 CONN-POST-TP-HDR
▶AA30J5 1251-4822 CONN-POST-TP-HDR
▶AA30J6 1251-8736 CONN-POST-TP-HDR
A30W4 8159-0005 RESISTOR-ZERO OHMS
▶DA30W7 8159-0005 RESISTOR-ZERO OHMS
▶DA30W11 8159-0005 RESISTOR-ZERO OHMS
▶AA30W1 1258-0141 JUMPER-REM
▶AA30W2 1258-0141 JUMPER-REM
A30W3 1258-0141 JUMPER-REM
▶AA30W4 1258-0141 JUMPER-REM
▶AA30W5 1258-0141 JUMPER-REM
24-A7-3 ▶C04284-86302 ROMs (Ver. 1.11) set
▶CA7U7 04284-85403 ROM 20K BITO
▶CA7U20 04284-85404 ROM 20K BIT8
Table 1. Parts Information
▶:New Item C: Change D: Delete A: Add
5

"V

Agilent 4284A PRECISION LCR Meter
(Including Option 001, 006, 201, 202, 301)
Service Manual
SERIAL NUMBERS
This manual applies directly to instruments whose serial number prefix is
2826J-, 2832J- or 2848J-, and whose ROM-based firmware version 01.10.
For additional important information about serial numbers,
read "SECTION 1, SERIAL NUMBER of this Service Manual."
..:..:•• Agilent Technologies
Agilent Part No. 04284-90100
Printed in JAPAN July 2000

Notice
The information contained in this document is subject to change without notice.
This document contains proprietary information that is protected by 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
©Copyright Agilent Technologies Japan, Ltd. 1989, 2000

Manual Printing History
The manual printing date and part number indicate its current edition. The printing date
changes when a new edition is printed. (Minor corrections and updates that are incorporated
at reprint do not cause the date to change.) The manual part number changes when extensive
technical changes are incorporated.
January 1989First Edition (part number: 04284-90100)
July 2000Second Edition (part number: 04284-90100)
iii

Safety Summary
The following general safety precautions must be observed during all phases of operation,
service, and repair of this instrument. Failure to comply with these precautions or with specific
WARNINGS elsewhere in this manual may impair the protection provided by the equipment.
In addition it violates safety standards of design, manufacture, and intended use of the
instrument.
The Agilent Thchnologies assumes no liability for the customer's failure to comply with these
requirements.
Ground The Instrument
To avoid electric shock hazard, the instrument chassis and cabinet must be connected to a
safety earth ground by the supplied power cable with earth blade.
DO NOT Operate In An Explosive Atmosphere
Do not operate the instrument in the presence of flammable gasses or fumes. Operation of any
electrical instrument in such an environment constitutes a definite safety hazard.
Keep Away From Live Circuits
Operating personnel must not remove instrument covers. Component replacement and internal
adjustments must be made by qualified maintenance personnel. Do not replace components
with the power cable connected. Under certain conditions, dangerous voltages may exist even
with the power cable removed. To avoid injuries, always disconnect power and discharge
circuits before touching them.
DO NOT Service Or Adjust Alone
Do not attempt internal service or adjustment unless another person, capable of rendering first
aid and resuscitation, is present.
DO NOT Substitute Parts Or Modify Instrument
Because of the danger of introducing additional hazards, do not install substitute parts or
perform unauthorized modifications to the instrument. Return the instrument to a Agilent
Technologies Sales and Service Office for service and repair to ensure that safety features are
maintained.
Dangerous Procedure Warnings
Warnings ,such as the example below, precede 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.
iv

Certification
Agilent Technologies certifies that this product met its published specifications at the time
of shipment from the factory. Agilent Technologies further certifies that its calibration
measurements are traceable to the United States National Institute of Standards and
Technology, to the extent allowed by the Institution's calibration facility, or to the calibration
facilities of other International Standards Organization members.
Warranty
This Agilent Technologies instrument product is warranted against defects in material and
workmanship for a period of one year from the date of shipment, except that in the case of
certain components listed in General Information of this manual, the warranty shall be for the
specified period. During the warranty period, Agilent Technologies will, at its option, either
repair or replace products that prove to be defective.
For warranty service or repair, this product must be returned to a service 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 firmware designated by Agilent
Technologies for use with an instrument will execute its programming instruction when
property installed on that instrument. Agilent Technologies does not warrant that the operation
of the instrument, or software, or firmware will be uninterrupted or error free.
Limitation Of Warranty
The foregoing warranty shall not apply to defects resulting from improper or inadequate
maintenance by Buyer, Buyer-supplied software or interfacing, unauthorized modification or
misuse, operation outside the environmental specifications for the product, or improper site
preparation or maintenance.
No other warranty is expressed or implied. Agilent Thchno'ogles specifically disclaims the
implied warranties of merchantability and fitness for a particular purpose.

Exclusive Remedies
The remedies provided herein are buyer's sole and exclusive remedies. Agilent technologies
shall not be liable for any direct, indirect, special, 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 Office.
Addresses are provided at the back of this manual.
vi

TABLE OF CONTENTS
SECTION 1. GENERAL INFORMATION
1-1. INTRODUCTION
1-2. MANUAL ORGANIZATION
1-3. INSTRUMENT COVERED BY THIS MANUAL
1-4. RECOMMENDED TEST EQUIPMENT
SECTION 2. ADJUSTMENTS
2-1. INTRODUCTION
2-1
2-1
2-2. SAFETY CONSIDERATIONS 2-1
2-3. TEST EQUIPMENT 2-2
2-4. ADJUSTABLE COMPONENTS 2-2
2-5. ADJUSTMENT INTERACTION 2-3
2-6. INITIAL OPERATING PROCEDURE 2-4
2-7. ADJUSTMENT PROGRAM 2-6
2-7-1. General Information 2-6
2-7-2. Initial Operating Procedure 2-7
2-7-3. Closing Procedure 2-9
2-8. POWER SUPPLY ADJUSTMENTS 2-10
2-8-1. Power Supply Switching Frequency
Adjustment 2-10
2-8-2. Power Supply Output Voltage Adjustment 2-12
2-9. SENSE AMPLIFIER DC OFFSET ADJUSTMENT 2-14
2-10. DC BIAS LEVEL ADJUSTMENT 2-16
2-11. TEST SIGNAL LEVEL/LEVEL MONITOR ADJUSTMENTS 2-17
2-12. IMPEDANCE MEASUREMENT ADJUSTMENTS 2-19

TABLE OF CONTENTS
SECTION 3. ASSEMBLY SERVICE INFORMATIONS
3-1. INTRODUCTION
3-1
3-1
3-2. SAFETY CONSIDERATIONS 3-1
3-3. RECOMMENDED TEST EQUIPMENT 3-1
3-4. AFTER SERVICE PRODUCT SAFETY CHECKS 3-2
3-5. ASSEMBLY DESIGNATIONS AND LOCATIONS 3-3
3-6. REPLACEABLE MECHANICAL PARTS LIST 3-5
3-7. TOOLS AND FASTENERS 3-16
3-8. DISASSEMBLY 3-16
3-8-1. Top Cover Removal 3-16
3-8-2. Al Assembly Removal 3-17
3-8-3. Removing the A2, A3, A4, A5, A6, A7
A20, A30, A31, A40, A50 assemblies 3-17
3-8-4. Front Panel Disassembly 3-18
3-8-5. A9 or A90 Assembly Removal 3-18
3-8-6. A10 Assembly Removal 3-18
3-8-7. A13 Assembly Removal 3-19
3-8-8. A91 (LCD module) Assembly Removal 3-19
3-9. THEORY OF OPERATION 3-21
3-9-1. Power Supply Block Section 3-21
3-9-2. Digital Control Block Section 3-23
3-9-3. Source Block Section 3-25
3-9-4. Transducer Block Section 3-27
3-9-5. Vector Ratio detector Section 3-30
3-10. FAULTY BOARD ISOLATION 3-35
3-10-1. Self Test 3-35
3-10-2. Faulty Board Isolation Program 3-38
3-10-3. Faulty Board Isolation Procedure 3-40

TABLE OF CONTENTS
SECTION 4. SERVICE SHEETS 4-1
4-1. INTRODUCITON 4-1
4-2. CIRCUIT DESCRIPTION
4-3. TROUBLESHOOTING AIDS
4-4. BOARD CONNECTOR PIN ASSIGNMENT
4-5. REPLACEABLE PARTS LIST
4-1
4-1
4-2
4-3
4-5-1. Abbreviations 4-3
4-5-2. Replaceable Parts Lists 4-4
4-5-3. Ordering Information 4-5
4-5-4. Direct Mailing Ordering 4-5
4-6. COMPONENT LOCATIONS 4-5
4-7. SCHEMATIC DIAGRAMS 4-5
4-8. Al POWER SUPPLY SERVICE SHEET 4-A1-1
4-9. A2 MODULATOR SERVICE SHEET 4-A2-1
4-10. A3 RANGE RESISTOR SERVICE SHEET 4-A3-1
4-11. A4 HIGH POWER AMPLIFIER/DC BIAS SERVICE SHEET 4-A4-1
4-12. A5 SIGNAL SOURCE SERVICE SHEET 4-A5-1
4-13. A6 VECTOR RATIO DETECTOR SERVICE SHEET 4-A6-1
4-14. A7 DIGITAL CONTROL SERVICE SHEET 4-A7-1
4-15. A9, A13, A90, A91 SERVICE SHEET 4-A9/A13/A90/A91-1
4-16. A10 MEMORY CARD INTERFACE SERVICE SHEET 4-Al 0-1
4-17. All MOTHERBOARD SERVICE SHEET 4-All-1
4-18. A20 HP-IB INTERFACE SERVICE SHEET 4-A20-1
4-19. A30 HANDLER INTERFACE (OPT.201) SERVICE SHEET 4-A30-1
4-20. A31 HANDLER INTERFACE (OPT.202) SERVICE SHEET 4-A31-1
4-21. A40 SCANNER INTERFACE (OPT.301) SERVICE SHEET 4-A40-1
APPENDIX A. MANUAL CHANGES A-1
A-1. INTRODUCTION A-1

A-2. MANUAL CHANGES A-1

SECTION 1
GENERAL INFORMATION
1-1. INTRODUCTION
This manual contains technical information concerning the adjustment and servicing of the
HP 4284A PRECISION LCR METER.
1-2. MANUAL ORGANIZATION
This manual contains four sections. A summary of each section follows.
SECTION 1. GENERAL INFORMATION
Section 1 describes this service manual and lists the recommended test equip-
ment for performance testing, adjusting, and servicing the HP 4284A.
SECTION 2. ADJUSTMENTS
Section 2 provides the necessary adjustments required to ensure that the
HP 4284A is within its published specifications after it has been repaired.
SECTION 3. ASSEMBLY SERVICE INFORMATIONS
Section 3 provides assembly service information (mechanical parts list, disassem-
bly procedures, theory of operation, and faulty board isolation procedures).
When repairing the HP 4284A: refer to this section first, isolate the faulty board,
and then repair the HP 4284A at the component level using the faulty board's
service sheet in SECTION 4.
SECTION 4. SERVICE SHEETS
Section 4 provides a service sheet for each board to use for component level
repair of the faulty board. Each service sheet contains a circuit description,
troubleshooting aids, replaceable parts list, component locations, and schematic
diagram.
Some boards have been set up under the exchange assembly program. So, their
service sheets only contain the exchange board's part number, and the test point
information.
NOTE
The performance test procedure is given in Section 10 of the HP 4284A Operation
Manual (P/N 04284-90000).
1-1