LeCroy WaveJet/A Service manual

LeCroy Color Digital Oscilloscopes

WaveJet/A Series

Service Manual

Version H – Feb. 2010

WJ-SM-E ECO H

LeCroy Corporate Headquarters

700 Chestnut Ridge Road
Chestnut Ridge, NY 10977-6499
USA

Tel : [phone]
http://www.lecroy.com

LeCroy European Service
LeCroy SA

4, Rue Moïse Marcinhes
Case postale 341
1217 Meyrin 1
Geneva

Tel : [phone]

LeCroy Japan Service

LeCroy Japan Corporation
Sasazuka Center Bldg. – 6th floor,
1-6, 2-Chome, Sasazuka, Shibuya-ku
Tokyo Japan 151-0073

Tel. [phone]

© 2007 by LeCroy Corporation. All rights reserved.

LeCroy, ActiveDSO, ProBus, SMART Trigger, WavePro, and Waverunner are registered
trademarks of LeCroy Corporation. JitterTrack, WaveMaster, and X-Stream are trademarks
of LeCroy Corporation. Information in this publication supersedes all earlier versions.
Specifications subject to change without notice.

Read this first

Warranty 1-1

1. Warranty and Product Support 1-1

1.2 Product Assistance 1-1

1.3 Maintenance Agreements 1-1

1.4 Staying Up to Date 1-2

1.5 Service and Repair 1-2

1.6 How to return a Product 1-2

1.7 What Comes with Your Scope 1-2

General Information 2-1

2.1 Product Assistance 2-1

2.2 Installation for Safe and Efficient Operation 2-1
Operating Environment 2-1
Safety Symbols 2-1
Power Requirements 2-3
Cleaning and Maintenance 2-3
Power On 2-3

Specifications

3.1....... Vertical System.......................................................................................................3-1

3.2....... Horizontal System...................................................................................................3-3

3.3....... Acquisition System..................................................................................................3-3

3.4....... Acquisition Processing............................................................................................3-3

3.5....... Trigger System........................................................................................................3-3

3.6....... Basic Triggers.........................................................................................................3-3

3.7....... SMART T riggers .....................................................................................................3-3

3.8....... Documentation and Connectivity ............................................................................3-4

3.9....... Display....................................................................................................................3-4

3.10..... Analog Persistence.................................................................................................3-4

3.11..... Zoom.......................................................................................................................3-4

3.12..... Internal Waveform Memory.....................................................................................3-4

3.13..... Setup Storage .........................................................................................................3-4

3.14..... Math Tools...............................................................................................................3-5

3.15..... Measure Tools.........................................................................................................3-5

3.16..... General...................................................................................................................3-5

3.17..... Environmental:........................................................................................................3-5

3.18..... Declaration of Conformity:......................................................................................3-6

Table of Contents i

Theory of Operation

4.......... Theory of Operation ..............................................................................................4-1

4.1....... Block Diagram .......................................................................................................4-1

Figure 4-1 Wavejet Block Diagram.......................................................................4-1

4.2....... FE & ADC UNIT ...................................................................................................4-2

4.2.1.... Front End...............................................................................................................4-2

4.2.1.1. Control ...................................................................................................................4-3

4.2.1.2. Divide gain.............................................................................................................4-3

4.2.1.3. Analogy control voltage.........................................................................................4-4

Figure 4-2 Front End Block Diagram 1................................................................4-4

4.2.2.... Analog to Digital Converter..................................................................................4-5

Figure 4-3 ADC System Architecture ...................................................................4-5

4.2.3.... Trigger & Timebase...............................................................................................4-6

Figure 4-4 Trigger & Time base Block Diagram ..................................................4-6

4.2.3.1. Trig amp.................................................................................................................4-6

4.2.3.2. TLC ........................................................................................................................4-6

4.2.3.3. TIM.........................................................................................................................4-7

4.2.3.4. Clock Generator.....................................................................................................4-7

4.2.3.5. Analogy Control voltage........................................................................................4-7

4.2.4.... DAC & Calibrator..................................................................................................4-8

Figure 4-5 Calibrator Block Diagram...................................................................4-8

4.3....... CPU Board.............................................................................................................4-9

Figure 4-6 CPU Board Block Diagram.................................................................4-9

4.3.1.... CPU........................................................................................................................4-10

4.3. 2... CPU Memory .........................................................................................................4-10

4.3. 3... NVRAM..................................................................................................................4-10

4.3. 4... Flash Memory........................................................................................................4-10

4.3. 5... Operating System..................................................................................................4-10

4.3. 6... WDP-LSI (Waveform Display Processor LSI) ......................................................4-10

4.3. 7... WDP Local Memory...............................................................................................4-11

4.3. 8... Interfaces...............................................................................................................4-11

4.3. 9... Buffer .....................................................................................................................4-11

4.4....... Mother Board.........................................................................................................4-12

4.5....... Front Panel............................................................................................................4-13

4.5.1.... Key board...............................................................................................................4-13

4.5.2.... Panel Board ...........................................................................................................4-13

4.5.2.1. Encoders.................................................................................................................4-13

4.6....... Power Supply.........................................................................................................4-15

Figure 4-7 Power Supply Block Diagram ...............................................................4-16

4.6.1.... Input Voltages........................................................................................................4-17

4.6.2.... Output Voltages.....................................................................................................4-17

4.6.3.... Basic Operation.....................................................................................................4-17

4.6.3.1. Pre-converter.........................................................................................................4-17

4.6.3.2. Main Converter .....................................................................................................4-17

4.6.4.... Connector Assignments.........................................................................................4-18

4.6.5.... Output Voltage Adjustment Range.......................................................................4-18

4.6.6.... +3.3V STBY Standby Supply Rail (Pre-Converter’s secondary output) .............4-19

4.6.7.... Over-Current Protection .......................................................................................4-19

ii Table of Contents Rev H

4.6.8.... Over-Temperature Protection ...............................................................................4-19

4.6.9.... Over-Voltage Protection ........................................................................................4-19

Performance Verification

5.......... Performance Verification.......................................................................................5-1

5.1....... Introduction...........................................................................................................5-1

5.1.1.... List of Tested Characteristics ...............................................................................5-1

5.1.2.... Calibration Cycle...................................................................................................5-1

5.2....... Test Equipment Required .....................................................................................5-2

5.2.1.... Test Records...........................................................................................................5-2

5.3....... Turn On..................................................................................................................5-2

5.4....... Input Impedance ...................................................................................................5-3

5.4.1.... Channel Input Impedance ....................................................................................5-3

5.4.2.... External Trigger Input Impedance.......................................................................5-6

5.5....... Peak-Peak Noise Level..........................................................................................5-7

5.6 ...... DC Accuracy...........................................................................................................5-10

5.6.1.... Positive DC Accuracy ............................................................................................5-10

5.7....... Offset Accuracy......................................................................................................5-13

5.7.1.... Positive Offset Accuracy........................................................................................5-13

5.7.2.... Negative Offset Accuracy ......................................................................................5-15

5.8....... Trigger Level..........................................................................................................5-21

5.8.1.... Description.............................................................................................................5-21

5.8.2.... Channel Trigger at 0 Division Threshold.............................................................5-21

5.8.3.... Channel Trigger at +3.0 Divisions Threshold .....................................................5-23

5.8.4.... Channel Trigger at −3.0 Divisions Threshold .....................................................5-24

5.9....... Time Base Accuracy...............................................................................................5-26

5.9.1.... Description.............................................................................................................5-26

5.9.2.... Clock Verification Procedure.................................................................................5-26

Table 1: WaveJet Test Report.............................................................................................1of 8

Table 2: Impedance Test Record.........................................................................................3 of 8

Table 3: Peak to Peak Noise Test Record...........................................................................3 of 8

Table 4: DC Gain Accuracy Test Record(CH1, CH2).........................................................4 of 8

Table 5: DC Gain Accuracy Test Record(CH3, CH4).........................................................4 of 8

Table 6: Positive Offset Test Record ..................................................................................5 of 8

Table 7: Negative Offset Test Record.................................................................................5 of 8

Table 8: 10 mV/div, Bandwidth Test Record......................................................................6 of 8

Table 9: 50 mV/div, Bandwidth Test Record......................................................................6 of 8

Table 10: 100 mV/div. Bandwidth Test Record ..................................................................7 of 8

Table 11: 500 mV/div. Bandwidth Test Record..................................................................7 of 8

Table 12: Channel DC Trigger Test Record.......................................................................8 of 8

Table 13: Time Base Test Record .......................................................................................8 of 8

Maintenance

6.......... Maintenance..........................................................................................................6-1

6.1....... Introduction...........................................................................................................1

6.1.1.... Safety Precautions.................................................................................................6-1

6.1.2.... Anti-static Precautions..........................................................................................6-1

Rev H

Table of Contents iii

6.2....... Board Exchange Procedure...................................................................................2

6.2.1.... Operation of the calibration mode ........................................................................6-2

6.2.2.... Front End & ADC UNIT .......................................................................................6-3

6.2.3.... CPU UNIT.............................................................................................................6-6

6.2.4.... POWER UNIT .......................................................................................................6-7

6.2.5.... KEY BOARD, PANEL BOARD and MOTHER BOARD......................................6-9

6.2.6.... List of value calibration ........................................................................................6-10

6.3....... Spare Parts............................................................................................................6-13

6.4....... Error indication at start up...................................................................................6-13

6.5....... Step Pulse adjustment (for 35x) ...........................................................................6-14

6.6....... Troubleshooting and Flow Charts ........................................................................6-17

6.6.1.... Introduction...........................................................................................................6-17

6.6.2.... Repair Level...........................................................................................................6-17

6.6.3.... Troubleshooting Flowchart for BOARD or UNIT ................................................6-18

6.6.4.... Power Supply Unit ................................................................................................6-20

6.6.5.... Boot up sequence ...................................................................................................6-21

6.6.6.... Inverter Board .......................................................................................................6-22

6.6.7.... Panel board............................................................................................................6-23

6.6.8.... Key Board ..............................................................................................................6-24

6.6.9.... FE Board and ADC Board.....................................................................................6-25

Mechanical Parts & Removal

7.......... Mechanical Parts & Removal................................................................................7-1

7.1....... Over All Replaceable Parts ...................................................................................7-1

7.2....... Over All Block Diagram ........................................................................................7-1

7.3....... Disassembly Flow Charts .....................................................................................7-2

STEP 1 Disassembly REAR CASE.....................................................................................7-3

STEP 2.Disassembly REAR COVER .................................................................................7-4

STEP 3.Disassembly FRONT END & ADC.......................................................................7-5

STEP 4.Disassembly CPU UNIT.......................................................................................7-6

STEP 5.Disassembly POWER BOARD .............................................................................7-7

STEP 6.Disassembly INLET..............................................................................................7-8

STEP 7.Disassembly MOTHER BOARD...........................................................................7-9

STEP 8.Disassembly FAN MOTOR ...................................................................................7-10

STEP 9.Disassembly INVERTER......................................................................................7-11

STEP 11.Disassembly LCD ................................................................................................7-13

STEP 12.Disassembly KEY BOARD .................................................................................7-14

7.4....... Assembly................................................................................................................7-16

Assembly 1 ..........................................................................................................................7-16

Assembly 2 ..........................................................................................................................7-16

Assembly 3 ..........................................................................................................................7-16

Assembly 4 ..........................................................................................................................7-17

Assembly 5 ..........................................................................................................................7-17

Assembly 7 ..........................................................................................................................7-17

Assembly 8 ..........................................................................................................................7-18

Assembly 9 ..........................................................................................................................7-18

Assembly 10 ........................................................................................................................7-18

Assembly 11 ........................................................................................................................7-18

iv Table of Contents Rev H

1. Warranty and Product Support

It is recommended that you thoroughly inspect the contents of the oscilloscope
packaging immediately upon receipt. Check all contents against the packing
list/invoice copy shipped with the instrument. Unless LeCroy is notified promptly of any
missing or damaged item, responsibility for its replacement cannot be accepted.
Contact your nearest LeCroy Customer Service Center or national distributor
immediately (see chapter 2 for contact numbers).

1.1 Warranty

LeCroy warrants its oscilloscope products for normal use and operation within
specifications for a period of three years from the date of shipment. Calibration each
year is recommended to ensure in-spec. performance. Spares, replacement parts and
repairs are warranted for 90 days. The instrument's firmware has been thoroughly
tested and is thought to be functional, but is supplied without warranty of any kind
covering detailed performance. Products not made by LeCroy are covered solely by
the warranty of the original equipment manufacturer.

Under the LeCroy warranty, LeCroy will repair or, at its option, replace any product
returned within the warranty period to a LeCroy authorized service center. However,
this will be done only if the product is determined after examination by LeCroy to be
defective due to workmanship or materials, and not to have been caused by misuse,
neglect or accident, or by abnormal conditions or operation.

1.2 Product Assistance

Note: This warranty replaces all other warranties, expressed or implied, including but
not limited to any implied warranty of merchantability, fitness, or adequacy for any
particular purpose or use. LeCroy shall not be liable for any special, incidental, or
consequential damages, whether in contract or otherwise. The client will be responsible
for the transportation and insurance charges for the return of products to the service
facility. LeCroy will return all products under warranty with transport prepaid.

Help on installation, calibration, and the use of LeCroy equipment is available from the
LeCroy Customer Service Center in your country.

1.3 Maintenance Agreements

LeCroy provides a variety of customer support services under Maintenance Agreements.
Such agreements give extended warranty and allow clients to budget maintenance costs
after the initial three-year warranty has expired. Other services such as installation,
training, enhancements, on-site repairs and calibrations are available through special
supplemental support agreements.

Read this First 1-1

1.4 Stay i ng Up to D a t e

LeCroy is dedicated to offering state-of-the-art instruments, by continually refining and
improving the performance of LeCroy products. Because of the speed with which physical
modifications may be implemented, this manual and related documentation may not
agree in every detail with the products they describe. For example, there might be small
discrepancies in the values of components affecting pulse shape, timing or offset, and —
infrequently — minor logic changes. However, be assured the scope itself is in full order
and incorporates the most up-to-date circuitry. LeCroy frequently updates firmware and
software during servicing to improve scope performance, free of charge during
warranty. You will be kept informed of such changes, through new or revised manuals
and other publications.

Nevertheless, you should retain this, the original manual, for future reference to
your scope’s hardware specifications.

1.5 Service and Repair

Please return products requiring maintenance to the Customer Service Department in
your country or to an authorized service facility. The customer is responsible for
transportation charges to the factory, whereas all in-warranty products will be returned to
you with transportation prepaid. Outside the warranty period, you will need to provide us
with a purchase order number before we can repair your LeCroy product. You will be billed
for parts and labor related to the repair work, and for shipping.

1.6 How to return a Product

Contact the nearest LeCroy Service Center or office to find out where to return the product.
All returned products should be identified by model and serial number. You should
describe the defect or failure, and provide your name and contact number. In the case of a
product returned to the factory, a Return Authorization Number (RAN) should be used.

Return shipments should be made prepaid. We cannot accept COD (Cash On
Delivery) or Collect Return shipments. We recommend air-freighting.

It is important that the RAN be clearly shown on the outside of the shipping package
for prompt redirection to the appropriate LeCroy department.

Note: Wherever possible, please use the original shipping carton. If a substitute
carton is used, it should be rigid and packed so that that the product is surrounded
by a minimum of four inches or 10 cm of shock-absorbent material.

1-2 Read this First

2. General Information

2.1 Product Assistance

Help on installation, calibration, and the use of LeCroy equipment is available from your
local LeCroy office, or from LeCroy’s

• Customer Care Center, 700 Chestnut Ridge Road, Chestnut Ridge,

New York 10977–6499, U.S.A., tel. [phone]

• European Service Center, 4, Rue Moïse Marcinhes, Case postale 341, 1217 Meyrin 1,
Geneva Switzerland, tel. [phone].

• LeCroy Japan Corporation, Sasazuka Center Bldg – 6
Sasazuka, Shibuya-ku, Tokyo Japan 151-0073, tel. [phone]

2.2 Installation for Safe and Efficient Operation
Operating Environment

th

floor, 1-6, 2-Chome,

The oscilloscope will operate to its specifications if the environment is maintained within
the following parameters:

Temperature................10 to 35 °C rated.

Humidity.......................5 t o 80 % RH ( no n -c o ndensing)

Altitude.........................2000 m (6560 ft)

The oscilloscope has been qualified to the following EN61010-1 category 2nd edition

and cUL: CAN/CSA C22.2 No61010-1-04

Safety Symbols

manual, they have the following meanings

Where these symbols or indications appear on the front or rear panels, and in this

.............................CAUTION: Refer to accompanying documents (for Safety-related

information). See elsewhere in this manual wherever the symbol is
present,as indicated in the Table of Contents.

:

General Information 2-1

.............................CAUTION: Risk of electric shock

..............................On (Supply)

........................... Off (Supply)

..............................Earth (Ground) Terminal

............................Protective Conductor Terminal

...............................Earth (Ground) Terminal on BNC Connectors

WARNING................... Denotes a hazard. If a WARNING is indicated on the instrument, do

not proceed until its conditions are understood and met.

Any use of this instrument in a

WARNING

The oscilloscope has not been designed to make direct measurements on the human

body. Users who connect a LeCroy oscilloscope directly to a person do so at their own
risk.

manner not specified by the
manufacturer may impair the
instrument’s safety protection.

2-2 General Information

Power Requirements

The oscilloscope operates from 90 to 264V at 47 to 63 Hz and 90 to 132 at 380 to 420
Hz. No voltage selection is required, since the instrument automatically adapts to the
line voltage present.

The power supply of the oscilloscope is protected against short-circuit and
overload by means of a current limiting circuit.

Maintain the ground line to avoid an electric shock.
None of the current-carrying conductors may exceed 250 V rms with respect to ground

potential. The oscilloscope is provided with a three-wire electrical cord containing a
three-terminal polarized plug for mains voltage and safety ground connection.

The plug's ground terminal is connected directly to the frame of the unit. For adequate
protection against electrical hazard, this plug must be inserted into a mating outlet
containing a safety ground contact.

Cleaning And Maintenance

Maintenance and repairs should be carried out exclusively by a LeCroy technician
Cleaning should be limited to the exterior of the instrument only, using a damp, soft
cloth. Do not use chemicals or abrasive elements. Under no circumstances should
moisture be allowed to penetrate the oscilloscope. To avoid electric shocks, disconnect
the instrument from the power supply before cleaning.

CAUTION

Risk of electrical shock:
No user serviceable parts
inside. Leave repair to
qualified personnel.

General Information 2-3

This page intentionally left blank

2-4 General Information

3. Specifications

Note - All specifications apply to WJ3xx and WJ3xxA series

3.1 Vertical System Bandwidth (-3 dB @ 50 ohms):

WJ354
WJ352
WJ334
WJ332
WJ324
WJ322
WJ314
WJ312

Input Channels: 4 (WJ354/334/324/314); 2 (WJ352/332/322/312)
Rise Time (typical):

WJ354
WJ352
WJ334
WJ332
WJ324
WJ322
WJ314
WJ312

Bandwidth Limiters:

WJ354
WJ352
WJ334
WJ332
WJ324
WJ322
WJ314
WJ312

500 MHz
350 MHz
200 MHz
100 MHz

750 ps

1.00 ns

1.75 ns

3.50 ns

20 MHz/100
MHz

20 MHz

Specifications 3-1

Input Impedance:

WJ354
WJ352
WJ334

1 Mohm+/-1.5 % || 16 pF, 50

ohm +/-1.5 %
WJ332
WJ324
WJ322
WJ314

1 Mohm+/-1.5 % || 20 pF
WJ312

Input Coupling:

WJ354
WJ352
WJ334

GND, DC1Mohm, AC1Mohm,

DC50ohm
WJ332
WJ324
WJ322
WJ314

GND, DC1Mohm, AC1Mohm
WJ312

.1.1 Max Input Range:

WJ354
WJ352
WJ334
WJ332
WJ324
WJ322
WJ314
WJ312

Vertical Resolution: 8-bit
Sensitivity:

WJ354
WJ352
WJ334
WJ332
WJ324
WJ322
WJ314
WJ312

+/-400 V
(50 ohms)

+/-400 V

2 mV/div~10 V/div (1 Mohms), 2 mV/div~2
V/div (50 ohms)

2 mV/div~10 V/div (1 Mohms)

CAT I (1 Mohms), 5 V

pk

CAT I (1 Mohms)

pk

rms

DC Gain Accuracy: +/-(1.5 % + 0.5% of full scale)
Offset Range:

Offset Accuracy: +/-(1 % + 0.5% of full scale + 1 mV)

3-2 Specifications

2 mV/div~50 mV/div +/-1 V

50.2m V/div~500m

+/-10 V
V/div
502 mV/div~10 V/div +/-100 V

3.2 Horizontal System Timebase Range:

WJ354
WJ352
WJ334
WJ332
WJ324
WJ322
WJ314
WJ312

Clock Accuracy: 10 ppm

500 ps/div - 50
s/div
1 ns/div - 50
s/div

2 ns/div - 50
s/div
5 ns/div - 50
s/div

3.3 Acquisition System

Single-shot Sampling Rate: 1 GS/s
Sampling Rate -- Equivalent Time Sampling (RIS): 100 GS/s
2 Channel Max.: 2 GS/s (WJ354/352/334/332/324/322); 1 GS/s (WJ314/312)
Standard Record Length: 500 kpts/Ch
Standard Capture Time: up to 250 µs at 2 GS/s (WJ354/352/334/332/324/322); up to

500 µs at 1 GS/s (WJ314/312)

3.4 Acquisition Processing

Averaging: Up to 256 sweeps
Peak Detect: Period of 1 ns

3.5 Trigger System

Trigger Modes: Auto, Normal, Single, Stop
Trigger Types: Edge, Pulse Width, Period, Pulse Count, TV
Trigger Source: Any Channel, Ext (100 mV/div), Ext/10(1 V/div), Line
Trigger Slope: Positive, Negative
Trigger Coupling: AC, DC, LFRej, HFRej
Holdoff by Time: up to 50 s
External Trigger Range: EXT: +/-0.5 V, EXT10: +/-5.0 V
External Trigger Impedance: 1 Mohms +/-1.5% || 16 pF (WJ354/352/334/332)
1 Mohms +/-1.5% || 20 pF (WJ324/322/314/312)

3.6 Basic Triggers

Edge/Slope: Triggers when the signal meets the slope (positive, negative) and level

condition

3.7 SMART Triggers

Pulse Width: 15 ns to 50 s

Specifications 3-3

Period (Interval): 40 ns to 50 s
Pulse Count: Edge trigger with Holdoff between 1 and 9999 events
TV Trigger: NTSC, PAL, Custom

Line: up to 3000
Field: (1, 2, 4, 8)

3.8 Documentation and Connectivity

Waveform File Data: Save waveform data to internal reference traces or USB memory

in binary, ASCII or Mathcad formats
Screen Images: Save screen images to USB memory in a variety of formats with white

or black background

USB: 1 front panel mounted USB 1.1 port.
Probes

1 PP006A probe per channel (WJ354/352/334/332); 1 PP010 probe per channel
(WJ324/322/314/312)

Scale Factors: Automatically or manually selected depending on probe used

3.9 Display

Type: Color, 7.5" Flat Panel TFT LCD
Resolution: VGA: 640 X 480 pixels
Real Time Clock: Date, Hours, Minutes, Seconds displayed with Waveforms
Grid Styles: YT, XY, XY Triggered
Waveform Display Styles: Sample dots joined or dots only

3.10 Analog Persistence

Analog and Color-graded Persistence: Variable saturation levels
Persistence Selections: Select Single or Spectrum.
Persistence Aging Time: 100 ms, 200 ms, 500 ms, 1 s, 2 s, 5 s, 10 s, Infinite

3.11 Zoom

Zoom Expansion Traces: Horizontal expansion of up to 4 zoom traces in a separate

grid

3.12 Internal Waveform Memory

REF Waveforms: Store up to 5 waveforms to the internal reference memory

3.13 Setup Storage

Front Panel and Instrument Status: Store up to 5 setups to the internal memory or

save to a USB memory device for recall later

3-4 Specifications

3.14 Math Tools

1 math trace; choose between Sum, Difference, Product, FFT (up to 8 kpts with
Rectangular, Hanning, and Flat Top windows)

3.15 Measure Tools Standard Parameters:

Vertical Horizontal Other

Maximum
Minimum
Peak-Peak
RMS
Cycle RMS
Mean
Cycle Mean
Top
Base
Top-Base
+Overshoot

-Overshoot

Tr 20-80%
Tf 80-20%
Tr 10-90%
Tf 90-10%
Frequency
Period
No. of
+Pulses
No. of ­Pulses
+Pulse
Width

-Pulse
Width
Duty Cycle

Integral
Skew
Skew@Level

3.16 General

Autocalibration: 3 minutes after power-up and whenever there is a change in ambient

temperature of 5 °C

Calibrator Signal: 0.6 V +/-1 %, 1 kHz +/-0.5 %
AC Power In:

90 to 264 VAC 47 to 63 Hz
90 to 132 VAC 380 to 420 Hz

Power Consumption: 75 VA max.
Standby Power Consumption: 10 VA max. (90 to 264 VAC, 50/60 Hz)
Physical Dimensions (HxWxD): 190 mm (7.5”) x 285 mm (11.2”) x 102 mm (4.0”)

Weight: 3.2 kg (approx.)
Warranty and Service: 3-year warranty, calibration recommended yearly
Optional service programs include extended warranty and calibration

services

3.17 Environmental:

Temperature (operating): 10 to 35 °C
Temperature (storage): -20 to +60 °C
Humidity (operating): 5 to 80% RH (non-condensing)

Specifications 3-5

Altitude (operating): up to 2000 m

Certifications:

CE EN61326:1997 +A1:1998 +A2:2001

+A3:2003

EN61010-1:2001
UL 61010-1, 2nd edition
cUL CAN/CSA C22.2 No 61010-1-04

3.18 Declaration of Conformity:

Meets intent of the European Council Directives 73/23/EEC for product
safety and 89/336/EEC for electromagnetic compatibility. This declaration
is based upon compliance of the WaveJet oscilloscope to the following
standards:

EN 61326: 1997 +A1:1998 +A2:2001 +A3:2003 EMC requirements for
electrical equipment for measurement, control, and laboratory use.

Emissions:

EN 55011: 1998+A2:2002 Radiated & Conducted Emissions (Class A)
EN 61000-3-2:2000 Harmonic Current Emissions

Immunity:

EN 61000-4-2:1999 Electrostatic discharge

(±4 kV contact discharge; ±8 kV air discharge)
EN 61000-4-3: 2002+A1:2003 RF Radiated Fields
(3 V/m, 80 MHz to 1 GHz, 80% amplitude modulated)

EC
Declaration

of Conformity

EN 61000-4-4: 2004 Electrical Fast Transient/Burst
(1 kV on AC mains)
EN 61000-4-5: 1995+A1:2001 Surge
(1 kV differential mode, 2 kV common mode)
EN 61000-4-6: 1996+A1:2001 RF Conducted Field
(3 V, 150 kHz to 80 MHz, amplitude modulated with
1 kHz sine wave)
EN 61000-4-11: 2004 Mains Dips and Interruptions

(100% interruption for 1 full AC cycle)
EN 61010-1: 2001 Safety requirements for electrical equipment for

measurement control and laboratory use
With the following limits:
Installation (Overvoltage) Category II

(Line voltage in equipment and to wall outlet)
Installation (Overvoltage) Category I
(All mains isolated terminals)

Pollution Degree 2
Protection Class I

3-6 Specifications

4 Theory of Operation

4.1 Block Diagram

Figure 4-1 Wavejet Block Diagram

Rev H Theory of Operation 4-1

4.2 FE & ADC UNIT

The FE & ADC UNIT is divided into the following sections:

• Front End (FE BOARD)
Composed the high impedance buffer, variable gain amplifier and differential
amplifiers circuit.

• Analog to Digital Converter (ADC BOARD)
Composed the ADC08D1000, DMC, and Memory circuit.

• Trigger (FE BOARD)
Composed the CH selector, coupling, TV sync and TLC circuit.

• Time Base (ADC BOARD)
Composed 1GHz & 200MHz clock generator by dual PLL controller and TIM
circuit.

• DAC & Calibrator (FE BOARD)

4.2.1 Front End

The front end processes an analog signal for ADC and trigger, consists of 1M ohms
attenuators, high impedance buffer, variable gain amplifier AD8370 and ADC drive
amplifiers.

The main functions of the Front end without the amplifiers are:

• Operation for four channels, calibration with Software controls.

• Input protection (clamp + thermal detection) and coupling (AC, DC, 1MΩ, 50Ω).

• Attenuator by 10, & by 100.

• Offset control of ±1V.

• Detection of over loading at 50Ω (WJ35x, WJ33x)

• Input of signal for DC calibration.

The main functions of AD8370 and ADC drive amplifiers are:

• Amplitude normalization for the ADC system: the BNC the dynamic range is 16 mV
to 80V FS (full scale) and the ADC/TRIG system input is 700 mV differential.

• Fine adjustment of gain and variable control.

• Bandwidth limiter of 20MHz and 100MHz.

4-2 Theory of Operation Rev H

4.2.1.1 Control

Relay control
The relay of the attenuator is set by selecting the input coupling and the gain as
shown in the table below.

Input coupling

Control port Relay GND 1M,DC 1M,AC 50,DC
GND RL1 H L L L

1M/*50 RL5 H H H L
AC/DC RL4 R S R S
1/10 RL2 S X X X
1/100 RL3 S X X X

H: high (+5V)
L: low (0V)
S: set for latching relay (+5V 10ms)
R: reset for latching relay (-5V 10ms)

Attenuator

Control port Relay 2mV-99mV 100mV-0.99V 0.99V-10V

1/10 RL2 R S S

1/100 RL3 R R S

4.2.1.2 Divide gain

The gain ratio in each block and input range is a table below.
The BNC the dynamic range is 16 mV to 80V FS (full scale) and the output is 700 mV
differential (ADC input).

The fine function of Volts/div is carry out by software magnify.

Range V/div
Block 2mV 5mV 10mV 20mV 50mV 100mV 200mV 500mV 1V 2V 5V 10V

ATT 1/*10 1 1 1 1 1 0.1 0.1 0.1 0.1 0.1 0.1 0.1
ATT 1/*100 1 1 1 1 1 1 1 1 0.1 0.1 0.1 0.1
AD8370 43.75 17.5 8.75 4.375 1.75 8.75 4.375 1.75 8.75 4.375 1.75 0.875
Total (ratio) 43.75 17.5 8.75 43.75 1.75 0.875 0.4375 0.175 0.0875 0.04375 0.0175 0.00875

4.2.1.3 Analog control voltage

Rev H Theory of Operation 4-3

Circuit name Signal level Signal name

CHx_OFFSET +/-4V Offset control signal for Front End

CHx_HFADJ 0 to 4V Frequency response adjust

INT_CAL -+/- 0.3V Signal each CH commonness for calibration

Figure 4-2 Front End Block Diagrams 1

4-4 Theory of Operation Rev H

4.2.2 Analog to Digital Converter

The analog to digital converter system performs the signal conversion to 8 bits by
using ADC08D1000, Digital Memory Controller (DMC), and Synchronous Memory.

3 wire Control

CH1 ADC SIG

CH2 ADC SIG

CH3 ADC SIG

CH4 ADC SIG

3 wire Control

ADC08D1000

Dual 1GS/s

8bit ADC

Clock Gene

ADC08D1000

Dual 1GS/s

8bit ADC

CH1

Momory

500k

Dig it a l Mo mo r y

Controler

Dig it a l Mo mo r y

Controler

CH3

Momory

500k

CH2

Momory

500k

DMC

WDP

DMC

CH4

Momory

500k

Figure 4-3 ADC System Architecture

Rev H Theory of Operation 4-5

4.2.3 Trigger & Timebase

TRIG

TRIG
AM P

CLK GENE

DCLK

ADC DM C

TLC

DATA

TRIG

TIM

W A T O to C H 3

Figure 4-4 Trigger & Time base Block Diagram

W DP FE

W J35x/33x

W J32x/31x

4.2.3.1 Trig amp

The main functions of Trig amp are:

z Selecting trigger source (CH1, CH2, CH3, CH4, EXT, Line)
z Setting of trigger level
z Setting of trigger coupling (DC, AC, LFREJ, HFREJ)
z Setting of slope (+, -)
z Generates TV SYNC signal

(Composite Sync. Output, Vertical Sync. Output, and ODD/EVEN output) to the
MST429A.

4-6 Theory of Operation Rev H

4.2.3.2 TLC

TLC (Trigger Control Logic) is custom CMOS Gate Array for trigger.
There is no external IC (MC100xxx) in WJ32x/31x.

The main functions of TLC are:

z Generates Actual trigger signal for Time Base.
z Setting of trigger type (Edge, Pulse, Period, Pulse Count, TV)
z Setting of Hold off time
z Frequency Counter

4.2.3.3 TIM

TIM (Time Interval Measurement) is the circuit, which measures the time relation of
Actual Trigger Signal and Sampling CLK.
The main functions of TLC are:

z Generates Actual trigger signal for DMC.
z Generates Gate Signal (TIMG) for DMC.

4.2.3.4 Clock Generator

Clock Generator consists of 10MHz reference oscillator, Dual PLL IC LM2330U,
2GHz VCO and 200MHz oscillator.
The main functions of TLC are:

z Generates 1GHz-sampling clocks for ADC.
z Start/Stop for synchronize ADC system.
z Generates 200.2MHz clock for TLC.

4.2.3.5 Analog Control voltage

Circuit name Signal level Signal name

CHx TRIG LVL1 +/-4V Trigger level control signal

TIM ADJ 0/+4V TIM gain control signal

PLL ADJ 0/+4V 200MHz VCO ADJ (Normally +2V Fix)

Rev H Theory of Operation 4-7

4.2.4 DAC & Calibrator

DAC & Calibrator consist of 16bit SCAN DAC, 8bit/12ch ADC and Calibrator.
The main functions of the DAC & Calibrator are:

• Generates Analog Control voltage for FE and ADC.

• Generates internal calibration signal.

• Generates CALOUT signal for probe.

3wire Control bus

Referenc e

+4V

Internal calibration
signal to CH1-4,EXT

~
+/-12mV

1/10

8bit /12ch

DAC

16bit /8ch

SCAN DAC

1/1
1/5

1/20

+/-3V +/-0.3V

Analog control
Voltage
0 to +4V

Analog control
Voltage
+/-4V

CALOUT
1kHz 0.6V

SW

Figure 4-5 Calibrator Block Diagram

4-8 Theory of Operation Rev H

4.3 CPU Board

CPU board controls the following main functions:

- Sensing Panel and Key event and control LEDs of Panel.

- Control the user Interface (Menu Control, Message Control etc.)

- Control the Front End Board and ADC Board.

Control USB Interface (Host and Device).

- Control the WDP-LSI (Waveform Display Processor).

- Control the Remote Interface.

Figure 4-6 CPU Board Block Diagram

Rev H Theory of Operation 4-9

4.3.1 CPU

The WaveJet processor is the Renesas 32-Bit RISC Microcomputer SH7727.

4.3. 2 CPU Memory

The CPU memory is connected to CPU via CPU address and data bus. The

memory’s configuration is 16Mbytes, consisting of 1 piece of 4M x 32bit SDRAM.

4.3. 3 NVRAM

NVRAM (Non Volatile RAM) is backed up by a lithium battery. The memory’s

configuration is 128kbytes, consisting of 1 piece of 128K x 8bit SRAM. This is
used for current panel setup, panel setup for Save/Recall and Reference
waveform data.

4.3. 4 Flash Memory

The flash memory is stored the firmware, font data, and adjustment data for ADC

board and Front-End board.

4.3. 5 Operating System

The system uses MiSPO, NORTi Ver.4 as the operating system. The operating

system is compliant with µITRON specifications. The µITRON specification is now
a de facto standard in the Japanese embedded industry.

4.3. 6 WDP-LSI (Waveform Display Processor LSI)

The main function of WDP-LSI is that it displays the acquired waveform to LCD

without CPU accessing. So, WaveJet‘s acquisition system has a high waveform
capture rates. The WDP-LSI is implemented with a Xilinx FPGA and has the
following features.

・ The LSI reads the acquisition data from up to 4-acquisition control LSIs (ASIC

having the same I/F as DMC1G: hereafter referred to as the new DMC-LSI) via
ACQ local bus, and performs waveform processing and display control.

・ The LSI is applicable to VGA (640 × 480 pixels) –TFT color LCD.
・ The LSI is capable of displaying waveform frequency and persistence

waveform in 16 gradations at the maximum.

・ The LSI is capable of performing various acquisition processing functions such

as normal, peak detection, average, equivalent sample, and equivalent
sample/average while controlling the new DMC-LSI.

・ Rolling display is allowed with the LSI within the low sweep speed range (50

ms/div. or higher).

4-10 Theory of Operation Rev H

・ Inversion, addition, subtraction, and multiplication can be performed with the

math function of the LSI. The waveform display calculated by the CPU is
supported.

・ The interpolation processing setting of the LSI can be selected from linear (LIN),

Sin (x)/x (SIN), or none (dot).

・ A desired waveform can be selected and displayed from up to 1000 waveforms

obtained in the past with the LSI (history function).

・ The LSI is provided with the deskew function that corrects the skew between

channels for the acquisition data. The math waveforms can be calculated and
displayed based on the acquisition data obtained after deskewing.

・ Gradation display is allowed in the X-Y mode.
・ The LSI with a built-in pulse width counter for measuring the phase difference

between the ADC output clock and the trigger signals is capable of displaying
waveforms, eliminating skew.

・ Various timing signals to be output to the LCD can be controlled based on the

setting of the internal register of the LSI.

4.3. 7 WDP Local Memory

The WDP local memory is connected to WDP-LSI via WDPs local bus. The

memory’s configuration is 16Mbytes, consisting of 1 piece of 4M x 32bit SDRAM.
The memory is used for waveform buffers, display memory and so on.

4.3. 8 Interfaces

The interface on CPU board has USB (Universal Serial Bus) interface which

includes device and host function.

4.3. 9 Buffer

The CPU local buses are buffered CPU address bus and CPU data bus. These

local buses are used for accessing other board, which connected with
Motherboard.

Rev H Theory of Operation 4-11

4.4 Mother Board

The main function of this board is connecting with other boars and module. These
connected boards and module are the following:

- CPU Board.

- Front panel.

- LCD module.

- Inverter module.

- Power board.

- Interface board (Optional).

Figure 4-** Mother Board Block Diagram

4-12 Theory of Operation Rev H

4.5 Front Panel

The front panel consists of two assemblies, the panel board and the keyboard assembly.

Figure 4-11 Front Panel Block Diagram

4.5.1 Keyboard

The front panel assembly consists of the panel board PCB, the panel board metal, the
elastomeric keypad and the keyboard PCB. The keyboard PCB connects to the panel
board assembly, which is connected to the motherboard by CPU local bus. The keyboard
has the LED’s, which illuminate some of the front panel buttons, and has trace patterns,
which act as switches when the elastomeric keypad shorts the traces together in
response to a key press.

4.5.2 Panel Board

Panel board consists of rotary encoder function and control logic (CPLD).
The main processor on CPU board reads the encoder status and the front panel key
status.

4.5.2.1 Encoders

The panel board contains all of the rotary encoders. All encoders have a push switch.
The encoders contain two switches but they are not potentiometers. The software can
determine the direction and speed the encoder is turning based on the order and
frequency of make and break connections of these internal switches. Note: The

encoders on the new WJ3xxA series are a different type, do not mix them with the
non-A type.

Rev H Theory of Operation 4-13

4-14 Theory of Operation Rev H

4.6 Power Supply

Do not touch any electric parts inside the power supplies during operation
as the primary side of the power unit has many high voltage portions to ground.

Power Supply Unit comprises of INLET BOARD and MAIN BOARD.

The INLET BOARD includes Inlet, Fuses and EMI Filters.

The MAIN BOARD includes Pre-converter (Power Factor Correction) and Flyback
Converter (off line).

The Pre-converter has secondary output, internal Bias Supply Circuits.
The Flyback Converter has multi-outputs with liner regulators.

Cooling

The power supply is cooled via forced airflow through its own enclosure. This airflow
is provided by a dedicated fan that is integrated into the power supply enclosure.
The direction of airflow is as follows: The fan will EXHAUST air FROM the unit.

Rev H Theory of Operation 4-15

Inlet
Board

CNAC1

CN1

EMI
Filter

Mult-Output
Flyback
Converter

PFC

LDO

Internal Bias
Voltage

Main Board

Feed Back

LDO

LDO

LDO

LDO

LDO

LDO

LDO

+5V

+5V_USB

+12V

-12V

-5V

+12V_Fan

+3.3V

+2.5V

Remort ON

+3.3(SB)

Figure 4-7 Power Supply Block Diagram

4-16 Theory of Operation Rev H

4.6.1 Input Voltages

The power supply supports a wide ranges of inputs, 90-132 V AC (45-65Hz, 360­440Hz) and 90-264V AC (45-65Hz) are allowed.

4.6.2 Output Voltages

The power supply makes several output voltages:

Table-1

Output Voltage Regulation Min.Load Typ.Load Max.Load

+12V ±5% 0A 0.25A 0.5A

+5V ±2% 0.65A 0.8A 1A

+3.3V ±5% 2.6A 4.6A 6.6A

+2.5V ±5% 0.2A 1.2A 2.2A

-5V ±2% 0.35A 0.6A 0.8A

-12V ±5% 0A 0.25A 0.5A

+5V USB ±5% 0.1A 0.3A 0.5A

+12V FAN ±10% 0.4A 0.8A 1.3A

+3.3V STBY ±5% 0A 0A 0.03A

4.6.3 Basic Operation

The power supply comprises of 2 converters and 8 Linear Regulator (LDO) and has 9
outputs

4.6.3.1 Pre-converter

Pre-converter operates as Power Factor Correction (PFC) circuit. It uses a Critical
Mode Boost Converter topology switching and using MosFETs as the primary switches.
The primary output of the PFC Converter is regulated to 385VDC.

The secondary output of the PFC Converter is about 4.0V. The output is regulated to

3.3VDC by LDO, and supplies as internal Bias voltage.
Whenever AC power Input, the pre-converter runs.

4.6.3.2 Main Converter

Rev H Theory of Operation 4-17

The converter is multi-output Fly Back topology, is switching at approximately 130KHz.
The 3.3V output is used feed back. All outputs except the 3.3V output are regulated

using a linear regulator (LDO).

4.6.4 Connector Assignments

The power supply connectors are arranged as follows:

4.6.5 Output Voltage Adjustment Range

Reference Function PIN NO. Assign
CNAC1 INPUT 1 AC

2 GND
3AC

CN1 INPUT 1 AC

2AC

CN2 OUTPUT 1 +2.5V

2 +3.3V
3 +3.3V
4 +5V USB
5 +12V
6 +5V
7 -5V
8 GND
9 GND

10 GND

CN3 OUTPUT 1 LINE SIGNAL

2 +3.3V STBY
3 +5V USB
4 +3.3V
5 GND
6 GND
7 GND
8 +2.5V

9 +12V
10 -12V
11 ON/OFF
12 +12V FAN
13 (to CN4-2)
14 (to CN4-1)

CN4 OUTPUT 1 (to CN3-14)

2 (to CN3-13)

3 GND

4 +12V FAN

The +3.3V, +5V and –5V Output, each output voltage has an adjustment range of the
nominal voltage as specified in the table-1. Turning adjustment potentiometers
clockwise increases the absolute value of output voltages.

4-18 Theory of Operation Rev H

4.6.6 +3.3V STBY Standby Supply Rail (Pre-Converter’s secondary output)

The +3.3V STBY is a standby supply output that is active whenever the AC power is
present. It provides a power source for the processor standby circuits and fly back
converter circuit for power on.

The +3.3V STBY output is capable of delivering up to 0.03A continuously with the fan
not operating.

4.6.7 Over-Current Protection

All outputs are protected against damage due to overloads or short circuits.
Each output has independent current limiting, but any other outputs except +3.3V Output

will not cause to shut down (That is, the power supply becomes off).
The +3.3V over current circuitry is latch type. Whenever Over-Current protection occurs,

all Outputs shut down or primary switching control is Hicup mode to protect Circuitry
damage. You must restart the power supplies by removing AC Line for a few minutes and
remove the cause of the over-current condition.

4.6.8 Over-Temperature Protection

The power supply will shut down before any damage occurs from over-temperature.
This is true independent of the cause of the over-temperature condition (i.e. blocked
power supply cooling fan, excessive ambient temperature, etc.)

When the power supplies restart, the power supply must remove AC Line for a few
minutes and remove the cause of the over-temperature condition.

4.6.9 Over-Voltage Protection

The 3.3V output has an over-voltage protection. If the output voltage becomes more
than about 120% of the nominal Voltage values, all outputs are shut down. When the
power supplies restart, the power supply must remove AC Line for a few minutes and
remove the cause of the over-Voltage condition.

Rev H Theory of Operation 4-19

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4-20 Theory of Operation Rev H

5. Performance Verification

5.1 Introduction

This chapter contains procedures suitable for determining if the WaveJet series
Digital Storage Oscilloscope performs correctly and as warranted. They check all the
characteristics listed in subsection 5.1.1.

This manual performance verification procedure can be followed to establish a
traceable calibration. It is the calibrating entities’ responsibility to ensure that all
laboratory standards used to perform this procedure are operating within their
specifications and traceable to required standards if a traceable calibration
certificate is to be issued for the WaveJet3xxx/A series Digital Storage Oscilloscope.

5.1.1 List of Tested Characteristics

This subsection lists the characteristics that are tested in terms of quantifiable
performance limits.

• Input Impedance

• Peak to Peak noise level (not required for traceable calibration)

• Positive and Negative DC Gain accuracy

• Positive and Negative Offset

• Bandwidth

• Trigger accuracy (not required for traceable calibration)

• Time base accuracy

• Time interval accuracy (Optional)

•

5.1.2 Calibration Cycle

The WaveJet series Digital Storage Oscilloscope requires periodic verification of
performance. Under normal use (2,000 hours of use per year) and environmental
conditions, this instruments calibration cycle is 12 months.

Rev. H Performance Verification 5-1

5.2 Test Equipment Required

These procedures use external, traceable signal generators, DC precision power
supply and digital multi-meter, to directly check specifications.

Instrument Specifications Recommended
Signal Generator

Radio Frequency
Signal Generator
Audio Frequency

Frequency : .5 MHz to 1 GHz
Frequency Accuracy : 1 PPM
Frequency : 0 to 5 kHz
Amplitude : 8 V peak to peak

HP 8648B or C,
Fluke 9500, Fluke 5820A
HP 33120A or equivalent
opt. 001 required for time

interval test.
Voltage Generator
DC Power Supply

Range of 0 to 20 V, in
steps of no more than 15 mV

Fluke 5820A, Fluke 9500

Datel DVC8500 or

equivalent
Power Meter +

Accuracy ±1 %

Sensor
Digital Multimeter
Volt & Ohm
Coaxial Cable, 5 ns
Coaxial Cable, 5 ns
2 Attenuators, 20 dB
Terminator
T adapter

Table 5-1 : Test Equipment

Voltmeter Accuracy : 0.1 %
Ohmmeter Accuracy : 0.1 %

50Ω, SMA, length 100 cm,
50Ω, BNC, length 100 cm,
50Ω, BNC, 1 % accuracy
50Ω, BNC, 1 % accuracy
50Ω, BNC T adapter

HP437B + 8482A or

equivalent

Keithley 2000 or equivalent

5.2.1 Test Records

The last pages of this chapter contain the WaveJet series test records in the format
of tables. Keep them as masters and use a photocopy for each calibration.

5.3 Turn On

If you are not familiar with operating the WaveJet, refer to the operator's manual.
 Switch on the power using the power switch.
 Wait for about 20 minutes for the scope to reach a stable operating

temperature:

 To provide for quicker setup of the scope for each test, a CD containing panel

setups has been included with this manual. These files must be copied to a USB
memory device in a directory named “SETUP”. Detailed set up information is
contained in the text if a USB device is not available.

5-2 Performance Verification Rev. H

5.4 Input Impedance

DC 1MΩ ±1.5%
DC 50Ω ±1.5%
AC 1.2MΩ ±1.5% at 2mV to 50mV/div
AC 1.0MΩ ±1.5% at 100mV to 10V/div

Specifications

The impedance values for 1MΩ and 50Ω coupling are measured with a high

precision digital multimeter. The DMM is connected to the DSO in 4 wire

configuration (input and sense), allowing for accurate measurements. Check that

the DMM used is measuring the 1 M

in a lower range some readings may not be within specifications.

Ω

inputs in at least a 3 MΩ range. If tested

5.4.1 Channel Input Impedance
a. DC 1MΩ

 Recall STUP0000 or configure the DSO :

Panel Setups : Recall FROM DEFAULT SETUP
Channels Trace ON Channel 1, Channel 2, Channel 3 & Channel 4
Input Coupling : DC 1MΩ on all 4 Channels
Input gain : 100 mV/div. on all 4 Channels
Time base : 200 ηsec/div
Trigger mode : Auto

 Set the DMM to 4 wire measurement mode connecting Ohms and Ohms sense.

Rev. H Performance Verification 5-3

 Connect DMM to Channel 1.

 Measure the input impedance and record it in Table 2, and compare it to the

limits.
 Repeat the above test for all input channels.
 Recall STUP0001 or set Input gain to 1.00 V/div on all 4 Channels
 Repeat the test for all input channels.

 Record the measurements in Table 2, and compare the test results to the limits in

the test record.

c. 50 Ω input (WJ35x and WJ33x only)

 Recall STUP3500 or configure the DSO :

Panel Setups : Recall FROM DEFAULT SETUP
Channels Trace ON Channel 1, Channel 2, Channel 3 & Channel 4
Input Coupling : 50Ω on all 4 Channels
Input gain : 100 mV/div. on all 4 Channels
Time base : 200 ηsec/div.
Trigger mode : Auto

 Measure the input impedance and record it in Table 2, and compare it to the

limits.
 Repeat the above test for all input channels.

d. AC 1MΩ

 Recall STUP0002 or configure the DSO :

Panel Setups : Recall FROM DEFAULT SETUP
Channels Trace ON Channel 1, Channel 2, Channel 3 & Channel 4
Input Coupling : AC 1MΩ on all 4 Channels
Input gain : 100 mV/div. on all 4 Channels
Time base : 200 ηsec/div.
Trigger mode : Auto

 Set the DMM to 4 wire measurement mode connecting Ohms and Ohms sense.
 Connect DMM to Channel 1.

5-4 Performance Verification Rev. H

 Measure the input impedance.

 Record the measurements in Table 2, and compare the test results to the
limits in the test record.

 Repeat the above test for all input channels.
 Recall STUP0003 or configure the DSO :
Panel Setups : Recall FROM DEFAULT SETUP

Channels Trace ON Channel 1, Channel 2, Channel 3 & Channel 4
Input Coupling : AC 1MΩ on all 4 Channels
Input gain : 10 mV/div. on all 4 Channels
Time base : 200 ηsec/div.
Trigger mode : Auto

 Set the DMM to 4 wire measurement mode connecting Ohms and Ohms sense.

 Connect DMM to Channel 1.

 Measure the input impedance.

 Record the measurements in Table 2, and compare the test results to the
limits in the test record.

 Repeat the above test for all input channels.

Rev. H Performance Verification 5-5

5.4.2 External Trigger Input Impedance
a. Ext DC 1MΩ Input Impedance

 Recall STUP0004 or configure the DSO:
Select Setup trigger
Trigger on : EXT

Impedance : DC 1MΩ

 Connect the DMM to External, and measure the input impedance.

 Record the input impedance in Table 2, and compare the result to the limit in the

test record.
 Recall STUP0005 or Set Trigger Source to Ext/10.
 Repeat the test for all input channels.
 Record the measurements in Table 2, and compare the test results to the

limits in the test record.

5-6 Performance Verification Rev. H

5.5 Peak-Peak Noise Level (not required for traceable calibration)

Description

Noise tests with open inputs are executed on all channels with 1M Ω input coupling, 0
mV offset, at a gain setting of 2 mV/div and 10 mV/div. The scope parameters functions
are used to measure the Peak to Peak amplitude of the noise.

Specifications

1.8 mV Peak-Peak at 2 mV/div.

4.0 mV Peak-Peak at 10 mV/div.
With no signal connected to the inputs

 Recall STUP0006 or configure the DSO:
Panel Setups : Recall FROM DEFAULT SETUP

Channels Trace ON Channel 1, Channel 2, Channel 3 & Channel 4
Input Coupling : DC 1M Ω on all 4 Channels
Input gain : 2 mV/div. on all 4 Channels
Input offset : 0.0 mV on all 4 Channels
Trigger setup : Edge
Trigger on : CH1
Trigger Mode : Auto
Time base : 1 µsec/div.

Sample rate 1GS
Max Memory Length 10k points
Press : Measure
Min/Max On

Measure No : A, B, C, D
Measure Source : CH1, CH2, CH3, CH4
Measure Item : Peak to Peak

 Record the four max Peak-Peak parameter values in Table 3, and compare

the test results to the limits in the test record.

Rev. H Performance Verification 5-7

Press Stop.

Recall STUP0007 or set Input gain to 10 mV/div. on all 4 Channels
 Record the measurements (max Peak-Peak of 1,2,3,4) in Table 3, and compare

the results to the limits in the test record.

5-8 Performance Verification Rev. H

5.6 DC Gain Accuracy

Specification

≤ ±1.5 % of reading + 0.5% of FS

Description

This test measures the DC Gain Accuracy within the gain range specified.
It requires a DC source with a voltage range of 0 V to 20 V adjustable in steps of no
more than 1 mV, and a calibrated DMM that can measure voltage to 0.1 %.
Measurements are made using voltage values applied by the external voltage
reference source, measured by the DMM, and in the oscilloscope using the
measurement parameters. For each known input voltage the delta value over 6
divisions is applied. The mean value is measured and the full 6 division tolerance is
used as the limit.

Procedure

 Recall STUP0008 or configure the DSO:
Panel Setups : Recall FROM DEFAULT SETUP

Channels Trace ON Channel 1, Channel 2, Channel 3 & Channel 4
Input Coupling : DC 1MΩ (see Table 4) on all 4 Ch
Input offset : 0.0 mV on all 4 Channels
Input gain : from 2mV/div to 10V/div . (see Table 4)
Bandwidth 20MHz

1 Averaging : 16 sweeps
2 Averaging : 16 sweeps
3 Averaging : 16 sweeps
4 Averaging : 16 sweeps

Trigger : Edge Trigger
Trigger on : Each channel
Mode : Auto
Time base : 1 µsec/div.
Measure setup : Mean

 Connect the test equipment as shown in Figure 5-2.

Figure 5-2: DC Accuracy Equipment Setup

Rev. H Performance Verification 5-9

5.6.1

 For each DSO Volts/div, set the output of the external DC voltage reference
source as shown in Table 4, column PS output.

1) Connect the DMM and record the voltage reading in Table 4, column DMM.

2) Press the delay knob to reset the acquisition

3) Read off the DSO Mean Measure Item, and Record the measurement in Table

4.
 For each DC voltage applied to the DSO input, repeat parts 1), 2) and 3).
 Calculate the Difference (∆ ) by subtracting the DMM voltage reading from the

DSO Mean voltage reading. Record the test result in Table 4, and compare
the Difference (∆ ) to the corresponding limit in the test record.

 Repeat step 5.6.1 for the other channels, substituting channel controls and Input

connector, enter data into table 5.

5-10 Performance Verification Rev. H

5.7 Offset Accuracy

Specifications
±(1.0% of offset +0.5% of FS + 1 mV)

Description

The offset test is done at 10 mV/div, with a signal of ±1.0000 Volt cancelled by an
offset of the opposite polarity.

5.7.1 Positive Offset Accuracy

Procedure

 Recall STUP0009 or configure the DSO:
Panel Setups : Recall FROM DEFAULT SETUP

Channels Trace ON Channel 1, Channel 2, Channel 3 & Channel 4
Input Coupling : DC 1MΩ on all 4 Channels
Input gain : 10mV/div on all 4 Channels
Input offset : +1.0000 Volt on all 4 Channels

1 Averaging : 16 sweeps
2 Averaging : 16 sweeps
3 Averaging : 16 sweeps
4 Averaging : 16 sweeps

Trigger setup : Edge
Trigger on : Line
Mode : Auto
Time base : 1 µsec/div.

 Set the Channel Offset on all 4 Channels to +1.000 V.
 Connect the test equipment as shown in Figure 5-2.

 Set the output of the external DC voltage reference source until the DMM

measures −1.0000 Volt.

1) Connect the DMM and record the voltage reading in Table 6, column DMM.

2) Press the delay knob to reset the acquisition

3) Read off the DSO Mean parameter voltage, and record the measurement in
Table 6, column Max.

 Repeat the test for the other channels, substituting channel controls and input

connector. Record the measurements in Table 6.

Press the delay knob to reset the acquisition after each channel change.

Rev. H Performance Verification 5-11

 Calculate the Difference ( ∆ ) by subtracting the DMM voltage reading from the

DSO Mean voltage reading.

 Record the test result in Table 6, and compare the Difference ( ∆ ) to the

corresponding limit in the test record.

5-12 Performance Verification Rev. H

5.7.2 Negative Offset Accuracy

Procedure

 Recall STUP0010 or configure the DSO as shown in 5.8.1 and for each channel

make the following change:

 Set the Channel Offset on all 4 Channels to -1.000 V.

 Connect the test equipment as shown in Figure 5-2.
 Set the output of the external DC voltage reference source until the DMM

measures +1.0000 Volt.

1) Connect the DMM and record the voltage reading in Table 7, column DMM.

2) Press delay knob to re-set the avg. sweeps.

3) Read off the DSO Maximum parameter voltage, and record the measurement
in Table 7, column Mean.

 Repeat the test for the other channels, substituting channel controls and input

connector. Record the measurements in Table 7, press delay knob to re-set the
avg. sweeps after each channel.

 Calculate the Difference (∆ ) by subtracting the DMM voltage reading from the
DSO Maximum voltage reading. Record the test result in Table 7, and
compare the Difference (∆ ) to the corresponding limit in the test record.

Rev. H Performance Verification 5-13

5.8 Bandwidth

5.8.1 Description

The purpose of this test is to ensure that the entire system has a bandwidth of at
least 500 MHz for a WaveJet 35x, 350 MHz for a WaveJet 33x and 200 MHz for a
WaveJet 32x and 100 MHz for a WaveJet 31x. An external source is used as the
reference to provide a signal where amplitude and frequency are well controlled.
The amplitude of the generator and cable as a function of frequency and power is
calibrated using a HP437B power meter with the HP8482A sensor or equivalent.
Note: If a leveled generator is used then the corrections needed by using the power
meter may not be necessary.

WaveJet 35x
50Ω : DC to at least 500 MHz (-3 dB)

WaveJet 33x
50Ω : DC to at least 350 MHz (-3 dB)

WaveJet 32x
50Ω terminated EXT: DC to at least 200 MHz (-3 dB)

WaveJet 31x
50Ω terminated EXT: DC to at least 100 MHz (-3 dB)

Specifications

5-14 Performance Verification Rev. H

 Recall STUP0011 for 32x, 31x and STUP3510 for 35x, 33x or configure the DSO:

Channels Trace ON Channel 1
Input Coupling : DC on all 4 Channels
WaveJet 35x, WaveJet 33x; Internal. 50Ω
WaveJet 32x, WaveJet 31x ; DC 1MΩ, terminated by external 50Ω
Input gain : 10 mV/div on all 4 Channels
Input offset : 0 mV on all 4 Channels
Trigger setup : Edge
Trigger on : Ch1- 4
Mode : Auto
Time base : 50 nsec/div.
Equiv. sampling : ON
Record length : 10K samples minimum
Measure Item : Peak-Peak of CH1, CH2, CH3, CH4

Panel Setups : Recall FROM DEFAULT SETUP

 Connect the HP8482A power sensor to the power meter.

 Zero and calibrate the HP8482A power sensor following the manufactures

instructions.

 Connect a BNC adapter to the HP8482A power sensor.

 Connect a 50Ω SMA cable to the RF output of the signal generator and then

through the necessary adapters to the power sensor. It is very important that the
same cable/generator be used throughout this BW procedure and that the SMA
connectors are torqued at all their mating locations.

Figure 5-3 : Power Meter Equipment Setup

 Set the generator frequency to 10 MHz

Rev. H Performance Verification 5-15

 Set the generator amplitude to measure 9 µW on the power meter.
 Read the displayed generator output amplitude, and record it in the third

column of the appropriate table.

 Repeat for each channel at 10MHz, recording the results in appropriate table.
 Perform the above measurement setting the 3db point for the model under test,

100.1, 200.1, 350.1 or 500.1 MHz. Set the measured power to the level listed in
the appropriate table. Record the generator output amplitude readout in the third
column of appropriate table.

 Repeat the above measurement for each channel recording the results in the

appropriate table.

 Disconnect the signal generator RF output from the power
sensor.

 Connect the RF output of the signal generator through the same cable that was

calibrated in the previous step into Channel 1.

Figure 5-4 : 50Ω Bandwidth Equipment Setup

 Set the generator frequency to 10 MHz.
 From the generator, apply the 10 MHz recorded generator signal amplitude to

channel 1.

 Measure the value of Peak-Peak(A) in the appropriate table.

5-16 Performance Verification Rev. H










 Set the scopes time base to 5ns/div. Increase the frequency of the generator to

the maximum input frequency for the model under test. Adjust the generator
amplitude recorded in column three for this frequency so that the power remains
constant. Measure the Peak-Peak(A) and record this value in the appropriate
table.

Rev. H Performance Verification 5-17

 Repeat the above steps for Channel 2, Channel 3, and Channel 4 substituting

channel controls, trigger settings and input connector. Record these
measurements in the appropriate table.

 Calculate the ratio to 10 MHz for each channel,

Peak-Peak500.1/ Peak-Peak10 (for WaveJet 35X)
Peak-Peak350.1/ Peak-Peak10 (for WaveJet 33X)
Peak-Peak200.1/ Peak-Peak10 (for WaveJet 32X)
Peak-Peak100.1/ Peak-Peak10 (for WaveJet 31X)
and compare the results to the limits in the test record.

 Repeat the above steps for a V/div setting of 20mV and 1v recording your results

in Tables 8, 9 and 10. Use the power setting shown in the results tables.

5-18 Performance Verification Rev. H

5.8 Trigger Level (not required for traceable calibration)

Specifications

+/- (5% of Trigger signal level + 30% of sensitivity)

5.8.1 Description

The trigger capabilities are tested for several cases of the standard edge trigger:

 Channel (internal), and External Trigger sources
 Three DC levels: −3, 0, +3 major screen divisions
 Positive and negative slopes

5.8.2 Channel Trigger at 0 Division Threshold

Recall STUP0012 or configure the DSO:

Channels Trace ON Channel 1, Channel 2, Channel 3 & Channel 4
Input Coupling : DC 1 MΩ on all 4 Channels
Input gain : 100 mV/div. on all 4 Channels
Input offset : 0 mV on all 4 Channels (use show status to verify)

Trigger setup : Edge
Trigger on : CH1
Slope : Pos
Mode : Auto
Set Trigger level : DC 0.0 mV
Pre-Trigger Delay : 0.0000 s

Time base : 5usec/div.
1 Pre-Processing: Averaging 16 sweeps
2 Pre-Processing: Averaging 16 sweeps
3 Pre-Processing: Averaging 16 sweeps
4 Pre-Processing: Averaging 16 sweeps
Measure : Off

 Set the output of the sine wave generator to 50 kHz.
 Connect the output of the generator to Channel 1 through a 50 Ohm coaxial cable

Panel Setups : Recall FROM DEFAULT SETUP

as shown in Figure 5-5 and adjust the sine wave output amplitude to get 90% of

full scale.

Rev. H Performance Verification 5-19

Figure 5-5 Channel Trigger Equipment Setup

 Set the TRIGGER LEVEL to 0.00V.

 Set the Cursors to “value at Cursor” and Cursor position to t=0.0000s by rotating

ADJUST knob.

 Press the delay knob to reset the acquisition.
 Record in Table 11 the level readout displayed.

Example in the case above: Record in the line of (Trigger Level –0, Trigger Slope­Pos) of Table 10 to 4.956mV.

 Compare the test results to the corresponding limit in the test record.

5-20 Performance Verification Rev. H

 Set Trigger Slope 1 : Neg
 Record in Table 10 the level readout displayed.
 Set trigger to channels 2, 3 and 4 for both POS and NEG slope, move input

signal to appropriate channel and compare the test results to the corresponding
limit in the test record. Press the delay knob to reset the acquisition before

taking a new reading.

5.8.3 Channel Trigger at +3.0 Divisions Threshold

 Recall STUP0013 or configure the DSO as shown in 5.10.2 and for each Channel

make the following change :

Trigger slope : POS
 Connect the output of the generator to Channel 1 through a 50 Ohm coaxial

cable.

Set Trigger level : DC +300 mV

Rev. H Performance Verification 5-21

 Record in Table 10 the level readout displayed.
Example in the case above: Record in the line of (Trigger Level +300, Trigger

Slope- Pos) of Table 10 to 315.9.

 Compare the test results to the corresponding limit in the test record.

 Set Trigger Slope 1 : Neg

 Record in Table 10 the level readout displayed.
 Set trigger to channels 2, 3 and 4 and for both POS and NEG slope move input

signal to appropriate channel and compare the test results to the corresponding
limit in the test record.

5.8.4 Channel Trigger at −3.0 Divisions Threshold

 Recall STUP0014 or configure the DSO as shown in 5.10.2 and for each channel

make the following change :

 Connect the output of the generator to Channel 1 through a 50 Ohm coaxial
cable. Press the delay knob to reset the acquisition.

Set Trigger level : DC −300 mV

5-22 Performance Verification Rev. H

 Record in Table 10 the level readout displayed.
Example in the case above: Record in the line of (Trigger Level -300, Trigger

Slope- Pos) of Table 10 to -305.4mV.

 Compare the test results to the corresponding limit in the test record.
 Set Trigger Slope 1 : Neg
 Press the delay knob to reset the acquisition.
 Record in Table 10 the level readout displayed.

 Set trigger to channels 2, 3 and 4 and for both POS and NEG slope move input

signal to appropriate channel and compare the test results to the corresponding
limit in the test record.

 Press the delay knob to reset the acquisition before taking a new reading.

Rev. H Performance Verification 5-23

5.9 Time Base Accuracy

5.9.1 Description

An external sine wave generator of 10.0 MHz with frequency accuracy better than 1
PPM is used.

Specifications

Clock: accuracy: ≤ 10 PPM

5.9.2 Clock Verification Procedure

 Recall STUP0015 or configure the DSO

Panel Setups : Recall FROM DEFAULT SETUP

Channels trace ON Channel 1
Input gain : .1 V/div.
Input offset : 0 mV
Trigger setup : Edge
TimeBase : 20ns/div
Trigger on : CH1
Slope 1 : Pos

Level 1 : 0 mV
Trigger mode : Auto

Delay : 0.0000 s
 Connect the RF output of the signal generator through a 50 Ohm

coaxial cable into Channel 1.
 Set the generator frequency to 10.0 MHz.
 Adjust the generator output amplitude to get 6 divisions peak to peak.

 Adjust the OFFSET to 0.00 V.
 Adjust TRIGGER LEVEL so the positive edge is located in the center.
 Recall panel STUP0016 or set the scope to the setting below.

 Set time/div to 5ns for WJ31x, 2ns for WJ32x, 1ns for WJ33x and WJ35x.

 Set DELAY to –1.0000 ms at the 1ms/div range.

 Set time/div to 5ns for WJ31x, 2ns for WJ32x, 1ns for WJ33x and WJ35x.

5-24 Performance Verification Rev. H

 Check to make sure that the positive edge is located within ±8 ns from the center

of the scale. (1 ppm = 1 ns)

 Read of the time between the center of the scale and the cross point and record

the value in Table 12.

The clock of accuracy is 2ppm in the figure above.

Rev. H Performance Verification 5-25

6.0 Time Interval Accuracy (optional test)

6.0.1 Description

An external function generator with frequency accuracy better than 0.5 PPM is
required. The function generator may require an external 10MHz reference to meet
the accuracy spec. The 33120A option 001 has this capability. The generator output
is set to square wave function with a frequency of 1 MHz (a period of 1000ns) and
peak-to-peak amplitude of 750mV (95% of full scale)

Specifications:
Time interval accuracy: ≤ ((10ppm * period)+1000ps) + Risetime/20 + 3.5ps

The 1000ps is added due to readout resolution accuracy.
 Recall STUP0017 or configure the DSO

Panel Setups : Recall FROM DEFAULT SETUP

Channels trace ON Channel 1
WaveJet 35x, WaveJet 33x; Internal. 50Ω

WaveJet 32x, WaveJet 31x ; DC 1MΩ, terminated by external 50Ω
Input gain : .1 V/div.
Input offset : 0 mV
Trigger setup : Edge
TimeBase : 200ns/div (equ. sample off)
Trigger on : CH1
Slope 1 : Pos

Level 1 : 0 mV
Trigger mode : Auto

Delay : 0.0000 s
 Connect the function generator through a 50 Ohm coaxial cable into Channel 1.
 Set the generator function to square wave
 Set the generator frequency to 1 MHz.

 Adjust the generator output amplitude to get 7.5 divisions (95% of FS)
 Read the period parameter A, express value in units of ps of time, and record the

value in the second column in table 13. i.e. 1000.0ns = 1000000 ps

 Read the risetime parameter B, express value in units of ps of time, and record

the value in seventh column in table 13, divide this value by 20.

 In the fifth column, enter the CLK accuracy of the scope, 10ppm x period

+1000ps due to readout resolution.

5-26 Performance Verification Rev. H

 In the third column, enter the difference between the second and first column.
 In the fourth column, enter (plus or minus) the square root of the sum of the

square of the values entered in columns 5, 6 and 8. Note that this represents
(plus or minus) the r.s.s. of time accuracy components t

, t2 and t3

1

 Verify that the time interval error in the third column is less than the time interval

accuracy limits of the fourth column.

Rev. H Performance Verification 5-27

This page intentionally left blank

5-28 Performance Verification Rev. H

6. Maintenance

6.1 Introduction

This chapter contains information necessary to board exchange, calibrate and
troubleshoot the LeCroy WaveJet 3xxx and WJ3xxA series.
The main difference between the two series is the black case and new encoders
used by the “A” model. The new “A” model also require a minimum of v5.06 SW, the
scope ID values are also different. See new ID values on page 6-6.

6.1.1 Safety Precautions

The symbol used in this manual indicates dangers that could result in personal injury.

The
damage the instrument.

Do not perform any servicing other than contained in service instructions. Refer to
procedures prior to performing any service.

the power OFF, disconnect the power cord and discharge all capacitors before
disassembling the instrument.

symbol used in this manual identifies conditions or practices that could

The following servicing instructions are for use by qualified personnel only.

Exercise extreme safety when testing high energy power circuits. Always turn

6.1.2 Anti-static Precautions

Any static charge that builds on your person or clothing may be sufficient to

destroy CMOS components, integrated circuits, Gate array’s..........etc.

In order to avoid possible damage, the usual precautions against static electricity are
required.

• Handle the boards in anti-static boxes or containers with foam specially designed
to prevent static build-up.

• Ground yourself with a suitable wrist strap.

• Disassemble the instrument at a properly grounded work station equipped with

anti-static mat.

Rev. H Maintenance 6-1

• When handling the boards, do not touch the pins.

• Stock the boards in anti-static bags.

6-2 Maintenance Rev. H

6.2 Board Exchange Procedure

 See chapter 7 for mechanical replaceable parts.
 See chapter 6.5 Troubleshooting.

6.2.1 Operation of the calibration mode

Enter to the calibration mode

1. Turning the power on while holding down the F1 and F4 keys at the same time.

F1
F2
F3
F4

2. Check the calibration mode by the UTILITIES menu.

Ordinal mode Calibration mode Calibration Item

Rev. H Maintenance 6-3

Press the front panel
UTILITIES button.

Select Item and Adjust Value

F1

Select Item
and Value

ADJUST FINE/COARSE -- This dual-function knob,
select Item no. 1 to 163, is used to dial values into
data entry fields

with F1 or F2

F2

button.

Press the knob to toggle between fine grain and
coarse grain adjustments.

Fine Coarse

6.2.2 FE & ADC UNIT

FE & ADC UNIT

of the WaveJet can not save the calibration data. This data is
saved to the CPU Board. If the FE & ADC UNIT is exchanged, the calibration
data supplied with

make note of the SN code in item 4, see step 4.

FE & ADC UNIT must be recalled. Before removing the ADC/FE

Procedure

STEP 1

Exchange the FE & ADC UNIT. See Chapter 7 Removal

STEP 2

Enter to the calibration mode 6.2.1 Operation of the calibration mode

6-4 Maintenance Rev. H

STEP 3

Recall the Calibration data from USB Memory port in the front of the scope.
Press UTILITIES button
Press F3 button, “Calibration”.
Press F4 button, “Recall cal. from USB Memory”.

Save the calibration data, Item No. 1 to 163 values, to the CPU UNIT.

Display “Recalled CALIB. CAL” at the under the screen

The file name is CALIB.CAL and must follow this path, “ \\CAL\CALIB.CAL”.

STEP 4

Set the four last digits of the serial number of the repaired WaveJet by selecting the
calibration menu "No. 4 Serial No". See note below. For the WJ3xx series this number is
the (s/n – 21092), for a S/N of 22404 the code to enter is 1312. For the WJ3xxA series the
number to enter is (s/n – 19639).

The manufacturer's 4 digit serial number is on a label
pasted to the inside of the REAR COVER. This
number is not the scope serial number.

STEP 5

Machine name setup, Set the machine name by selecting the calibration menu "SYSTEM ID".

After setting it, check to make sure that the machine name is correct by selecting as
follows: Utilities > Status Update > Status.

SYSTEM ID Model

0 NU
1 WJ354
2 WJ334
3 WJ324
4 WJ314
5 WJ352
6 WJ332
7 WJ322
8 WJ312

Rev. H Maintenance 6-5

WJ3xxA system ID numbers:

SYSTEM ID Model

0 NU
11 WJ354A
12 WJ334A
13 WJ324A
14 WJ314A
15 WJ352A
16 WJ332A
17 WJ322A
18 WJ312A

STEP 6

Adjustment of internal reference voltage (center value)

Adjustment specifications 0±0.1mV
Method of adjustment
Select the calibration menu item "CAL REF BAL".
Measure the output from the CALOUT terminal by the

DMM.
Adjust the value to 0V by rotating ADJUST button.

STEP 7

Adjustment of internal reference voltage (+3V reference value)

Adjustment specifications ±0.05% (+2.9985V to +3.0015V)

Method of adjustment Select the calibration menu item "CAL REF GAIN".
Measure the output from the CALOUT terminal by the

DMM and adjust the value to +3V by rotating ADJUST
button.

6-6 Maintenance Rev. H

STEP 8

Execute “self calibration”.

Auto adjustment Items of the list of value calibration is calibrated.
Press “save value to FlashROM” to update the changed settings.

Rev. H Maintenance 6-7

6.2.3 CPU UNIT

CPU UNIT is defective:

1. Save the calibration data from CPU UNIT to USB memory device if you can
acquire the calibration data.

2. If you are unable to save the calibration data from the CPU UNIT

Return both assemblies(CPU & FE/ACQ.) to the factory . A floppy disk will
be returned with the new CALIB file. Follow instructions for FE/ADC
replacement.

Procedure

STEP 1

Exchange the CPU UNIT. See Chapter 7 Removal

STEP 2

Enter to the calibration mode See 6.2.1 Operation of the calibration mode

STEP 3

Recall the Calibration data from USB Memory port in the front of the scope.
Press UTILITIES button
Press F3 button, “Calibration”.
Press F4 button, “Recall cal. from USB Memory”.

Save the calibration data, Item No. 1 to 163 values, to the CPU UNIT.

Display “Recalled CALIB. CAL” at the under the screen

6-8 Maintenance Rev. H

6.2.4 POWER UNIT

............................. CAUTION: Risk of electric shock

Procedure

STEP 1

Exchange the POWER UNIT. See Chapter 7 Removal

STEP 2

Enter to the calibration mode 6.2.1 Operation of the calibration mode

STEP 3

Adjustment of the internal reference voltage (center value)
Adjustment specifications 0±0.1mV

Method of adjustment
Select the calibration menu item "CAL REF BAL".
Measure the output from the CALOUT terminal by the

DMM.
Adjust the value to 0V by rotating ADJUST button.

STEP 4

Adjustment of internal reference voltage (+3V reference value)

Adjustment specifications ±0.05% (+2.9985V to +3.0015V)

Method of adjustment Select the calibration menu item "CAL REF GAIN".
Measure the output from the CALOUT terminal by the

DMM and adjust the value to +3V.

STEP 5

Execute “self calibration”.

Rev. H Maintenance 6-9

Auto adjustment Items of the list of value calibration is calibrated.

Measure the power supply voltages as shown in the table below. If any are found to be
outside of their specifications, POWER UNIT may be exchanged.

The locations of parts are referring to Layouts in Chapter 7.
The following table lists the nominal, min and max voltages for the outputs from the main

power supply. Verify them at the locations listed.

ADC Board

Output voltage Point of measurement

+2.5 V 29J4#1
+3.3 V 29J4#2 and 3

+12 V 29J4#5

+5 V 29J4#6

-5 V 29J4#7

Measure each voltage by the DMM with the default settings.

6.2.5 KEY BOARD, PANEL BOARD and MOTHER BOARD

6-10 Maintenance Rev. H

Procedure

STEP 1

Exchange the KEY BOARD, PANEL BOARD and MOTHER BOARD. See
Chapter 7 Removal

STEP 2

Enter to the calibration mode 6.2.1 Operation of the calibration mode

STEP 3

From the Calibration mode select Test

Next select Production Test. Select On. A picture of the front panel will appear on the screen
Press each button in turn, each push knob and turn each knob in both directions, they will

change color to gray.
Continue until all buttons and knobs have been tested, the total should indicate that all needed

items were pressed or turned. .

RETURN/CLEAR: Panel Test End

Rev. H Maintenance 6-11

6.2.6 List of value calibration

N o . M enu wording Data file wording D e fault Ad justme n t

No. 001 MFG .YEAR M FG _YEAR 2005 Fixed
No. 002 MFG .MONTH MFG_MO N TH 1 Fixed
No. 003 MFG .FACTORY MFG_FACTOR Y 6 Fixed
N o . 004 S ERIAL No. SER IAL_ NU M 1 Manual
No. 005 SYSTEM ID SYSTEM_ID 1 M anual
No. 006 LANGUAGE MODE LANGUAGE MODE 0 Fixed
N o . 007 O PTION ID OP T ION _ID 0 Fixed
No. 008 CONTRAST CONTRAST 0 Fixed
No. 009 CAL R EF GA IN REF_G A IN 25000 Manual
No. 010 CAL REF BAL REF_BAL 0 Manual
No. 011 PLL ADJ P LL_AD J 127 Fixed
N o . 012 T IM G A I N TIM_GA IN 12 7 Manual
No. 013 TRG SKEW TRG_SKEW -600 M anual
No. 014 TRG SKEW ILV TRG_SKEW_ILV -600 M anual
No. 015 TRG SR C CH 1 SKEW TRG_SRC_CH1_SKEW 0
No. 016 TRG SR C CH 2 SKEW TRG_SRC_CH2_SKEW 0 M anual
No. 017 TRG SR C CH 3 SKEW TRG_SRC_CH3_SKEW 0 M anual
No. 018 TRG SR C CH 4 SKEW TRG_SRC_CH4_SKEW 0 M anual
No. 019 TRG SR C EXT SKEW TRG _SRC_EXT_SKEW 0
No. 020 TRG EVEN T SKEW TRG_EVENT_SKEW 700 M anual
No. 021 TRG Pulse SKEW TRG_PULSE_SKEW -50 M anual
No. 022 TRG Period SKEW TRG_PERIOD_SKEW 0 M anual
No. 023 CH1 DMC ADC CLK DLY CH1_DMC_ADC_CLK_DLY 12 M anual
No. 024 CH2 DMC ADC CLK DLY CH2_DMC_ADC_CLK_DLY 12
No. 025 CH3 DMC ADC CLK DLY CH3_DMC_ADC_CLK_DLY 12 M anual
No. 026 CH4 DMC ADC CLK DLY CH4_DMC_ADC_CLK_DLY 12 M anual
No. 027 CH1& 2 D M C M E M C LK DLY CH12_D M C _M E M _CL K_D LY 0 Manual
No. 028 CH3& 4 D M C M E M C LK DLY CH34_D M C _M E M _CL K_D LY 0
No. 029 CH3 DMC WDIS CH3_DMC_W DIS 1 M anual
No. 030 CH3 DMC WDIG CH3_DMC_WDIG 5 Manual
No. 031 CH4 DMC WDQS CH4_DMC_W DQS 1 M anual
No. 032 CH4 DMC WDQG CH4_DMC_WDQG 5 Manual
No. 033 DMC TDLG DMC_TDLG 5 Manual
No. 034 CH1 2mV PRE GA IN CH1_2M V _P RE G AIN 110 Auto
No. 035 CH1 5mV PRE GA IN CH1_5M V _P RE G AIN 44 Auto
No. 036 CH1 10mV PRE GA IN CH1_10MV _P RE G AIN 22 Auto
No. 037 CH1 20mV PRE GA IN CH1_20MV _P RE G AIN 78 Auto
No. 038 CH1 50mV PRE GA IN CH1_50MV _P RE G AIN 32 Auto
No. 039 CH1 10V PR E GA IN CH 1_10V _PR E GA IN 16 A uto
No. 040 CH2 2mV PRE GA IN CH2_2M V _P RE G AIN 110 Auto
No. 041 CH2 5mV PRE GA IN CH2_5M V _P RE G AIN 44 Auto
No. 042 CH2 10mV PRE GA IN CH2_10MV _P RE G AIN 22 Auto
No. 043 CH2 20mV PRE GA IN CH2_20MV _P RE G AIN 78 Auto
No. 044 CH2 50mV PRE GA IN CH2_50MV _P RE G AIN 32 Auto
No. 045 CH2 10V PR E GA IN CH 2_10V _PR E GA IN 16 A uto
No. 046 CH3 2mV PRE GA IN CH3_2M V _P RE G AIN 110 Auto
No. 047 CH3 5mV PRE GA IN CH3_5M V _P RE G AIN 44 Auto
No. 048 CH3 10mV PRE GA IN CH3_10MV _P RE G AIN 22 Auto
No. 049 CH3 20mV PRE GA IN CH3_20MV _P RE G AIN 78 Auto
No. 050 CH3 50mV PRE GA IN CH3_50MV _P RE G AIN 32 Auto
No. 051 CH3 10V PR E GA IN CH 3_10V _PR E GA IN 16 A uto
No. 052 CH4 2mV PRE GA IN CH4_2M V _P RE G AIN 110 Auto
No. 053 CH4 5mV PRE GA IN CH4_5M V _P RE G AIN 44 Auto
No. 054 CH4 10mV PRE GA IN CH4_10MV _P RE G AIN 22 Auto
No. 055 CH4 20mV PRE GA IN CH4_20MV _P RE G AIN 78 Auto

Manual

Manual

Manual

Manual

6-12 Maintenance Rev. H

R

R

No . Menu wording Data file word ing Default Adjustm e nt

No. 056 CH4 50m V P R E G A IN CH4_50MV_PR E GA IN 32 Auto
No. 057 CH4 10V PR E G A IN CH 4_10V _P R E GA IN 16 Auto
No. 058 CH1 2m V A D C F S CH1_2MV_ADC _FS 255 Auto
No. 059 CH1 5m V A D C F S CH1_5MV_ADC _FS 255 Auto
No. 060 CH1 10m V A D C F S C H 1_10M V _A D C _FS 255 Auto
No. 061 CH1 20m V A D C F S C H 1_20M V _A D C _FS 255 Auto
No. 062 CH1 50m V A D C F S C H 1_50M V _A D C _FS 255 Auto
No. 063 CH1 10V AD C F S CH1_10V_ AD C_FS 255 Auto
No. 064 CH2 2m V A D C F S CH2_2MV_ADC _FS 255 Auto
No. 065 CH2 5m V A D C F S CH2_5MV_ADC _FS 255 Auto
No. 066 CH2 10m V A D C F S C H 2_10M V _A D C _FS 255 Auto
No. 067 CH2 20m V A D C F S C H 2_20M V _A D C _FS 255 Auto
No. 068 CH2 50m V A D C F S C H 2_50M V _A D C _FS 255 Auto
No. 069 CH2 10V AD C F S CH2_10V_ AD C_FS 255 Auto
No. 070 CH3 2m V A D C F S CH3_2MV_ADC _FS 255 Auto
No. 071 CH3 5m V A D C F S CH3_5MV_ADC _FS 255 Auto
No. 072 CH3 10m V A D C F S C H 3_10M V _A D C _FS 255 Auto
No. 073 CH3 20m V A D C F S C H 3_20M V _A D C _FS 255 Auto
No. 074 CH3 50m V A D C F S C H 3_50M V _A D C _FS 255 Auto
No. 075 CH3 10V AD C F S CH3_10V_ AD C_FS 255 Auto
No. 076 CH4 2m V A D C F S CH4_2MV_ADC _FS 255 Auto
No. 077 CH4 5m V A D C F S CH4_5MV_ADC _FS 255 Auto
No. 078 CH4 10m V A D C F S C H 4_10M V _A D C _FS 255 Auto
No. 079 CH4 20m V A D C F S C H 4_20M V _A D C _FS 255 Auto
No. 080 CH4 50m V A D C F S C H 4_50M V _A D C _FS 255 Auto
No. 081 CH4 10V AD C F S CH4_10V_ AD C_FS 255 Auto
No. 082 CH1 ADC ITLV OFSBAL CH1_ADC_ITLV_OFSBAL 0 Auto
No. 083 CH2 ADC ITLV OFSBAL CH2_ADC_ITLV_OFSBAL 0 Auto
No. 084 CH3 ADC ITLV OFSBAL CH3_ADC_ITLV_OFSBAL 0 Auto
No. 085 CH4 ADC ITLV OFSBAL CH4_ADC_ITLV_OFSBAL 0 Auto
No. 086 CH1 ADC ITLV FS CH1_ADC_ITLV_FS 255 Auto
No. 087 CH2 ADC ITLV FS CH2_ADC_ITLV_FS 255 Auto
No. 088 CH3 ADC ITLV FS CH3_ADC_ITLV_FS 255 Auto
No. 089 CH4 ADC ITLV FS CH4_ADC_ITLV_FS 255 Auto
No. 090 CH1 ADC ITLV DLY COARSE CH1_ADC_ITLV_DLY_COA
No. 091 CH1 ADC ITLV DLY FINE CH1_ADC_ITLV_DLY_FINE 0 Fixed
No. 092 CH3 ADC ITLV DLY COARSE CH3_ADC_ITLV_DLY_COA
No. 093 CH3 ADC ITLV DLY FINE CH3_ADC_ITLV_DLY_FINE 0 Fixed
No. 094 CH1 2m V H F C H 1_2M V _H F 60 Fixed
No. 095 CH1 10m V H F C H 1_10M V_HF 200 Manua l
No. 096 CH2 2m V H F C H 2_2M V _H F 60 Fixed
No. 097 CH2 10m V H F C H 2_10M V_HF 200 Manua l
No. 098 CH3 2m V H F C H 3_2M V _H F 60 Fixed
No. 099 CH3 10m V H F C H 3_10M V_HF 200 Manua l
No. 100 CH4 2m V H F C H 4_2M V _H F 60 Fixed
No. 101 CH4 10m V H F C H 4_10M V_HF 200 Manua l
No. 102 CH1 2mV OFSBAL CH1_2MV_OFSBAL 0 Auto
No. 103 CH1 5mV OFSBAL CH1_5MV_OFSBAL 0 Auto
No. 104 CH1 10mV OFSBAL CH1_10MV_OFSBAL 0 Auto
No. 105 CH1 20mV OFSBAL CH1_20MV_OFSBAL 0 Auto
No. 106 CH1 50mV OFSBAL CH1_50MV_OFSBAL 0 Auto
No. 107 CH1 10V OFSBAL CH1_10V_O FSBAL 0 Auto
No. 108 CH2 2mV OFSBAL CH2_2MV_OFSBAL 0 Auto
No. 109 CH2 5mV OFSBAL CH2_5MV_OFSBAL 0 Auto
No. 110 CH2 10mV OFSBAL CH2_10MV_OFSBAL 0 Auto

0 M anual
0 M anual

Rev. H Maintenance 6-13

g

g

A

A

A

A

A

A

A

A

A

A

A

A

A

A

A

A

A

A

A

A

A

A

A

A

A

A

A

A

A

A

A

A

No. Menu wordin

No. 111 CH2 20mV OFSBAL CH2_20MV_OFSBAL 0Auto
No. 112 CH2 50mV OFSBAL CH2_50MV_OFSBAL 0
No. 113 CH2 10V OFSBAL CH2_10V_OFSBAL 0
No. 114 CH3 2mV OFSBAL C H3_2M V_OF SBAL 0
No. 115 CH3 5mV OFSBAL C H3_5M V_OF SBAL 0
No. 116 CH3 10mV OFSBAL CH3_10MV_OFSBAL 0
No. 117 CH3 20mV OFSBAL CH3_20MV_OFSBAL 0
No. 118 CH3 50mV OFSBAL CH3_50MV_OFSBAL 0
No. 119 CH3 10V OFSBAL CH3_10V_OFSBAL 0
No. 120 CH4 2mV OFSBAL C H4_2M V_OF SBAL 0
No. 121 CH4 5mV OFSBAL C H4_5M V_OF SBAL 0
No. 122 CH4 10mV OFSBAL CH4_10MV_OFSBAL 0
No. 123 CH4 20mV OFSBAL CH4_20MV_OFSBAL 0
No. 124 CH4 50mV OFSBAL CH4_50MV_OFSBAL 0
No. 125 CH4 10V OFSBAL CH4_10V_OFSBAL 0
No. 126 CH1 Offset GAIN CH1_OFFS E T_G AIN 25000
No. 127 CH2 Offset GAIN CH2_OFFS E T_G AIN 25000
No. 128 CH3 Offset GAIN CH3_OFFS E T_G AIN 25000
No. 129 CH4 Offset GAIN CH4_OFFS E T_G AIN 25000
No. 130 TRG CH1 DC BAL TRG_CH1_DC_BAL 0
No. 131 TRG CH2 DC BAL TRG_CH2_DC_BAL 0
No. 132 TRG CH3 DC BAL TRG_CH3_DC_BAL 0
No. 133 TRG CH4 DC BAL TRG_CH4_DC_BAL 0
No. 134 TRG EXT DC BAL TRG_EXT_DC_BAL 0
No. 135 TRG AC BAL TRG_AC_BAL 0
No. 136 TRG -BAL TRG_NEG_BAL 0
No. 137 TRG CH 1 G A IN TRG_CH1_GA IN 25000
No. 138 TRG CH 2 G A IN TRG_CH2_GA IN 25000
No. 139 TRG CH 3 G A IN TRG_CH3_GA IN 25000
No. 140 TRG CH 4 G A IN TRG_CH4_GA IN 25000
No. 141 TRG EXT G A IN TRG _EXT _G A IN 25000
No. 142 CH1 OV ER LO A D R E F CH1_OVLD _R E F 500 Manual
No. 143 CH2 OV ER LO A D R E F CH2_OVLD _R E F 500 Manual
No. 144 CH3 OV ER LO A D R E F CH3_OVLD _R E F 500 Manual
No. 145 CH4 OV ER LO A D R E F CH4_OVLD _R E F 500 Manual
No. 146 INVERTER SAVE1 REF INVERTER_SAVE1 120 Fixed
No. 147 INVERTER SAVE2 REF INVERTER_SAVE2 200 Fixed
No. 148 CH2 OU T B A L C H 2_O U T_ BA L 0 Manual
No. 149 CH-A PROBE OFS CHA_PROBE_OFS 0 Fixed
No. 150 CH-B PROBE OFS CHB_PROBE_OFS 0 Fixed
No. 151 INTEN GRAD1 INTEN_GRAD1 31 Fixed
No. 152 INTEN GRAD2 INTEN_GRAD2 31 Fixed
No. 153 INTEN OFS INTEN_OFS 31 Fixed
No. 154 PER INTEN GRAD PER_INTEN_GRAD 15 Fixed
No. 155
No. 156 COMP INTEN GRAD COMP_INTEN_GRAD 3 Fixed
No. 157 COMP INTEN AMP GRAD COMP_INTEN_AMP_GRAD 3 Fixed
No. 158 COMP INTEN AMP OFFSET COMP_INTEN_AMP_OFS 4 Fixed
No. 159 PILE TRACE PILE_TRACE 2 Fixed
No . 160 S IN INTERPOLATE SIN 1 Fixed
No. 161 Init on Next Boot INIT_ON_NE XTB O OT 0 Fixed
No. 162 DMC D ebug M ode DMC_DEB U G _M O D E 0 Fixed
No. 163 W D P D ebug M ode WD P _D E B U G_MODE 0 Fixed

TTACK GRAD

Da ta file wordin

TTACK_GRAD 4 Fixed

Default Adjustment

uto
uto
uto
uto
uto
uto
uto
uto
uto
uto
uto
uto
uto
uto
uto
uto
uto
uto
uto
uto
uto
uto
uto
uto
uto
uto
uto
uto
uto
uto

6-14 Maintenance Rev. H

6.3 Spare Parts

LeCroy P/N Assembly Performance

Tests

IW211858093
IW211858091
IW211858092
IW211858090

WJ354/334 FE/ADC UNIT
WJ324/314 FE/ADC UNIT Chapter 5

WJ352/332 FE/ADC UNIT Chapter 5
WJ322/312 FE/ADC UNIT Chapter 5

Chapter 5

IWWDS100531 WJxxx Processor\ CPU UNIT Chapter 5
IWWDS080711 WJxxx POWER UNIT None
IWWDS400131 WJxxx KEY UNIT None
IWWDS400121 WJxxx PANEL UNIT None
IWWDS100541 WJxxx MOTHER UNIT None

See chapter 7 for mechanical replaceable parts.

6.4 Error indication at startup

If an error has occurred at startup, the corresponding LED indication appears as shown in
the table below, and see 6.5

Troubleshooting.

Error

LED indication Error description

code

1 SINGLE/STOP lit up Flash ROM device type recognition error
2 NORMAL lit up Board model option type recognition error
3 SONGLE/STOP & NORMAL lit up Device initialization error
4 AUTO lit up System error (OS initialization error)
5 AUTO & SINGLE/STOP lit up System error (task/object initialization error)
6 AUTO & NORMAL lit up System error (key interrupt handler registration

error)

7 AUTO & NORMAL &

SINGLE/STOP lit up
8 REF lit up System error (OS system startup error)
9 REF & SINGLE/STOP lit up WDP-LSI FPGA configuration error

10 REF & NORMAL lit up WDP-LSI initialization error
11 REF & NORMAL & SINGLE/STOP

lit up

12 REF & AUTO lit up Acquisition memory access error

System error (timer interrupt startup error)

DMC-LSI initialization error

Rev. H Maintenance 6-15

6.5 Step Pulse adjustment for 35x and 33x

The purpose of this adjustment is to ensure that WJ35x FE UNIT for repair has the specifications
both Bandwidth and Overshoot.

Adjustment Locations Front End Board (holes for adjustment)

Adjustment specifications DC50Ω 10mV/div, 20mV/div Overshoot/other distortions are

9% or less for WJ35x and 7% or less for WJ33x.

Settings Reference waveform PSPL TD-1107B + 12dB ATT

(10mV/div)

PSPL TD-1107B + 6dB ATT (20mV/div)

Time/div 2 ns/div, EQU ON, Max Memory Length 10k points
Input Coupling DC 50 Ω

Connection

Overshoot (Rise-time)

Bandwidth

Method of adjustment Adjust the waveform in the 10mV/div and 20mV/div ranges.

6-16 Maintenance Rev. H

(1) Set value to +60 in the Item “No.94 CH1 2mV HF” of

the calibration mode.

(2) In the 20mV/div range, connect the TD1107B through

6dB ATT.
(3) Adjust the overshoot with 2C35 within 9%.
(4) Set the calibrated Sine Wave Generator to 120mV and

500.1MHz for WJ35x and 300.1MHz for WJ33x.

(5) In the 20mV/div range, connect the calibrated Sine

Wave Generator through 50-ohm coaxial cable.
(6) Check the amplitude within 4.7 to 5.2/div with 2C35.
(7) Repeat step(2) to step(6) and Bandwidth and

Overshoot are correctly supplied.

Adjustment trimmer (on the FE board)

CH1 CH2 CH3 CH4
20mV/div 2C35 3C35 4C35 5C35
1V/div 2R55 3R55

4R55 5R55

(8) In the 10mV/div range, adjust the overshoot with Item

“No.95 CH1 10mV HF".

10mV/div CHx 10mV HF 60 to 255
20mV/div CHx 2mV HF Shall be fixed at 60

Calibration Mode

Value

Rev. H Maintenance 6-17

(9) Check the amplitude from 4.7 to 5.2/div in the 10mV/div

ranges.

(10) Adjust the CH2 through CH4 in the same manner.

6-18 Maintenance Rev. H

6.6 Troubleshooting and Flow Charts

6.6.1 Introduction

The troubleshooting information contained in this chapter is intended for use

by qualified personnel having a basic understanding of electronics (analog and
digital). In order to simplify servicing and minimize downtime, the following list of

possible symptoms, likely causes, and troubleshooting steps have been prepared.
The first step in troubleshooting is to check for obvious items like blown fuses.
The power supply is the next item to check before proceeding to more detailed

troubleshooting, since noise or low power supply voltages can cause a variety of

digital and analog problems.

Updating the System Software

System software updates are downloaded through the USB memory port in the front of the scope.

1. Insert the USB memory device containing the

software update in a folder called \firmware into
the USB port at the front of the scope.

2. Press the front panel UTILITIES button.

3. From page 2/3 of the “Utilities” menu, select

Status & Update, then Update.

4. Select OK from the “Update” menu; software

download begins.
The Replay LED on the front panel flashes while
download is in progress.

When finished the update, the message “Update
completed. Please reboot Scope” is displayed.

Never turn off the power while updating the System Software.

CAUTION

Never remove the USB device.

6.6.2 Repair Level

Most procedures in this chapter will allow troubleshooting down to the

LEVEL.

Defective circuit boards will be repaired or exchanged by the regional LeCroy
service office or the local representative.

Rev. H Maintenance 6-19

BOARD

6.6.3 Troubleshooting Flowchart for BOARD or UNIT

START

P

OWER SWITCH ON

P

ERFORM THE POWER SUPPLY

IS

FAN RUNNING

NO

?

U

NIT TROUBELSHOOTING

PROCEDURE

IN CHAPTER

6.5.4.

YES

DO

THE

LED

AND BEEP

FLASH

ON

?

NO

IS

THE

"LEC

YES

D

OES

WHEN

NOBS TURN

YES

D

OES

WHEN

PUSH

ROY

LOGO DISPLAYED

THE SYSTEM

RESPOND

THE

THE SYSTEM

RESPOND

BOTTON

P

ERFORM THE BOOT UP

S

EQUENCE

T

D

S

"

?

YES

P

ERFORM THE INVERTER BOARD

NO

T

ROUBLESHOOTING PROCEDURE

P

NO

ERFORM THE PANEL BOARD

T

ROUBLESHOOTING PROCEDURE

?

P

N

ERFORM THE KEY BOARDS

O

T

ROUBLESHOOTING PROCEDURE

?

OES THE

F

LASHING

LEDS

ARE

"REF"

AND

"ALT" ?

CHAPTER 6.5.6.

IN

IN

CHAPTER 6.5.7.

IN

CHAPTER 6.5.8.

NO

YES

ROUBLESHOOTING

P

ROCEDURE IN

CHAPTER

6.5.5

E

XCHANGE THE CABLES

CPU

BETWEEN

ADC

BOARD AND

BOARD

.

YES

P

IS F

ORFORMANCE

CORRECT

YES

END

ERFORM THE

B

?

NO

OARDS TROUBLESHOOTING

IN

FE

AND

P

ROCEDURE

CHAPTER 6.5.9.

ADC

S

6-20 Maintenance Rev. H

6.6.4 Power Supply Unit

S

TART

ARE

FUSES OPEN

N

AC P

OWER INPUT

THE

?

O

Y

ES

R

EPLACE THE INLET

B

OARD

S

EE IN CHAPTER

.

6.2.4.

D

OES STANDBY

VOLTAGE

R

EMOTE

SECONDARY

V

OLTAGES OUTPUT

OUTPUT

Y

ES

ON

INPUT

ARE A

(3.3V)

LL

?

Y

ES

E

ND

?

SIGNAL

R

EPLACE THE POWER

N

O

S

N

O

S

B

OARD

.

EE IN CHAPTER

R

EPLACE THE POWER

B

OARD

EE IN CHAPTER

6.2.4.

.

6.2.4.

Rev. H Maintenance 6-21

Procedure 1: Fuses Check

The power supply has a surge voltage protection circuit. If AC LINE exceed specified high
input voltage, the varistor protects a surge voltage and any fuse may be opened.

When fuses are open, the varistor may be damaged, so replace the Inlet Board.

Procedure 2: Check Standby voltage (3.3V)

The power supply has standby output (3.3Vstandby).
When ac-power is inputted, the power supply outputs 3.3V standby(internal bias Voltage) at

CN3 pin 2.

Procedure 3: Check ON/OFF signal

The power supply has a remote switch
When CN3 pin 11 is connected to GND, all voltages are not supplied.

6-22 Maintenance Rev. H

6.6.5 Boot up sequence

START

DO THE LEDS

FLASH

AND BEEP

?

ON

END

NO

REPLACE CPU BOARD

SEE IN CHAPTER 6.2.3/6.5.3

YES

Rev. H Maintenance 6-23

6.6.6 Inverter Board

S

TART

IS

THE

"LEC

LOGO DISPLAYED

YES

ROY

REPLACE INVERTER BOARD

"

?

NO

TROUBLESHOOTING

PROCEDURE IN 6.5.3.

IS

THE

"LECOY"

LOGO DISPLAYED

?

NO

E

XCHANGE THE

C

ABLE BETWEEN

I

NVERTER

B

OARD AND POWER

B

OARD

YES

END

6-24 Maintenance Rev. H

6.6.7 Panel board

S

TART

D

OES

S

THE

RESPOND

THE

D

OES THE SYSTEM

RESPONSE

THE

YSTEM

WHEN

NOBS TURN

YES

WHEN

KNOBS TURN

R

NO

?

YES

NO

?

EPLACE PANEL BOARD

IN

SEE

SEE

CHAPTER

D

OES

S

THE

RESPOND

NOBS TURN

THE

R

EPLACE MOTHER

B

OARD

IN

CHAPTER

YSTEM

WHEN

6.2.5

?

6.2.5

D

OES THE SYSTEM

YES

E

ND

YES

RESPONSE

KNOBS TURN

THE

E

XCHANGE THE

C

ABLE BETWEEN

P

ANEL BOARD AND

M

OTHER BOARD

NO

WHEN

?

.

Rev. H Maintenance 6-25

6.6.8 Key Board

S

TART

D

OES THE SYTEM

RESPONSD

WHEN

THE BOTTON PUSH

R

NO

?

EPLACE KEY BOARD

SEE

IN

CHAPTER

D

OES THE SYTEM

RESPONSD

WHEN

THE BOTTON PUSH

6.2.5

R

ECHECK POWER

NO

?

SUPPLY

,

CPU UNIT

PANEL BOARD

,

YES

E

ND

E

XCHANGE THE

C

ABLE BETWEEN KEY

B

OARD AND PANEL

B

OARD

6-26 Maintenance Rev. H

6.6.9 FE Board and ADC Board

S

TART

IS T

IMEBASE

A

CCURACY

P

ROBLEM

NO

IS V

ERTICAL

A

CCURACY

P

ROBLEM

NO

?

?

YES

YES

R

EPLACE

SEE

R

EPLACE

SEE

IN

IN

ADC B

CHAPTER

FE B

CHAPTER

OARD

6.2.2

OARD

6.2.2

END

Rev. H Maintenance 6-27

This page intentionally left blank

6-28 Maintenance

Mechanical Parts & R

l

7 Mechanical Parts & Removal

7.1 Over All Replaceable Parts

Item Fig. No Part Number Name Description

1 KHB202511 FFC-40P-L60-P0.5 3
2 KHB202611 FFC-40P-L100-P0.5 1
3 KHB202811 POWER-INVERTER CABLE UL-I 1
4 KHB203611 POWER-ADC CABLE UL-I 1
5 KHB203711 POWER-MOTHER CABLE UL-I 1
6 DMT620711 109P0612H727 CABLE 150MM 1
7 KHB194411 FFC-33P-L100-P0.5 Flat Cable 1

emova

7.2 Over All Block Diagram

Mechanical Part& Removal 7-1

7.3 Disassembly Flow Charts

Note:
Power is always present on the CPU motherboard and inside the Power Supply
whenever the power cord is plugged into a power source. Remove the power cord
from the instrument before removing or inserting any connectors to the CPU
motherboard. Extreme caution should be taken in protecting the LCD face from
damage (e.g. scratch marks.) when handling, in particular when inserting or

moving from the instrument. re

START

S TEP 1

REAR CASE

STEP 2

REAR COVER

S

TEP 3

FRONT END Assembly

S

TEP 4

CPU Assembly

S

TEP 5

POWER BOARD

STEP 6

INLET

STEP 7

MOTHER BOARD

STEP 8

FAN MOTOR

STEP 9

INVERTER

STEP 10

SUB PANEL

7-2 Mechanical Parts & Removal

STEP 1 Disassembly REAR CASE

• Remove the four KB (+) 3X8S (NIP) and KB (+) 3X16S (NIP) screws on the rear case.
REAR CASE Replaceable Parts

Item Fig. No Part Number Description Quantity

1 MKB130082 KB (+) 3X8S(NIP) 4
2 MKB130162 KB (+) 3X16S(NIP) 4
3
4
5 KRA259011 WJ （ ） NAME LABEL 1
5 KRA276211 WJ 354A NAME LABEL 1
6
6
7 DCN015971 INLET NC-174-10N-G 1
8
8

9
10
11
12
12

KRA259911 WJ USB BLANK LABEL
KAS094511 Grand terminal B

KRA257221 Warning label UL-I 1
KRA276011 Warning label UL-I WJ3xxA 1

KCM150921 REAR FOOT UL-I
KCM152921 REAR FOOT UL-I WJ3xxA
KGM029111 RUBBER FOOT 2
TGM029711 EK-Rubber foot 2
KGM030211 PICHU RUBBER FOOT 2
KCM150721 NEW DSO REAR CASE UL-I 1
KCM152821 NEW DSO REAR CASE UL-I WJ3xxA 1

1
1

2
2

Mechanical Part & Removal 7-3

Removal of REAR FOOT
from REAR CASE is to press
the arrow’s part to the
direction of the arrow.

STEP 2. Disassembly REAR COVER

• Remove the screws in the rear cover in order of Item Fig. No 1-2-3-4.
Note: Assembling REAR COVER, tighten in the same order of the disassembly.

REAR COVER Replaceable Parts

Item Fig. No Part Number Description Quantity

1 KSQ003111 KH (+) 3X4S-NIP 3
2 MKD130103 KD (+) 3X10S 3CR 2
3 MKB130082 KB (+) 3X8S(NIP) 3
4 MKB130162 KB (+)3X16S(NIP) 5
5

KBA819521 REAR COVER

1

Remove the three KB (+) on left side and the four 3X8S(NIP) screws on right side of the rear

cover.

Item Fig. No Part Number Description Quantity

1 MKB130082 KB(+)3X8S(NIP) 7

Left Side from FRONT Right Side from FRONT

7-4 Mechanical Parts & Removal

STEP 3. Disassembly FRONT END & ADC

• Disconnect the two flat cables, 29J1 and 29J2, on the ADC printed-circuit board.

• Remove the two SM4 (+) 3X8SNIP.screws on the ADC printed-circuit board.

• Remove the three KB (+).3X8S (NIP).screws on the both sides of the sub-panel.

• Remove the connector (20J2) on the ADC printed-circuit board.

FRONT END Replaceable Parts

Item Fig. No Part Number Description Quantity

1 MKB130082 KB (+) 3X8S(NIP) 3
2 KSQ012711 SM4 (+) 3X8SNIP 2
3 KHB202511 FFC-40P-L60-P0.5 2
4 KHB203611 POWER-ADC CABLE UL-I 1
5 KCM141911 PS KEY TOP H1 UL-I 1
5 KCM153211 PS KEY TOP H1 UL-I WJ3xxA 1

- - -

- - -

6
6

21185-80-93
21185-80-91
21185-80-92
21185-80-90

WJ354 FE & ADC UNIT 1
WJ324 FE & ADC UNIT 1
WJ352 FE & ADC UNIT 1
WJ322 FE & ADC UNIT 1

Mechanical Part & Removal 7-5

6: FE & ADC UNIT

7-6 Mechanical Parts & Removal