Yokogawa DL7100, DL7200 Service Manual

Service
Manual

Model 7014
DL7100/DL7200
Digital Oscilloscope

SM 701410-01E

Yokogawa Electric Corporation

SM 701410-01E

3rd Edition

IMPORT ANT NOTICE TO THE USER

This manual contains information for servicing YOKOGAWA’s DL7100/DL7200 Series
Digital Oscilloscopes. Check the serial number to confirm that this is the correct
service manual for the instrument to be serviced. Do not use the wrong manual.

Before any maintenance and servicing, read all safety precautions carefully .

Only properly trained personnel may carry out maintenance and servicing described
in this service manual.

Do not disassemble the instrument or its parts, unless otherwise clearly permitted by
this service manual.

Do not replace any part or assembly, unless otherwise clearly permitted by this
service manual.

In principle, Yokogawa Electric Corporation (YOKOGAWA) does not supply parts
other than those listed in the customer maintenance parts list in this service manual
(mainly modules and assemblies). Therefore if an assembly fails, the user should
replace the whole assembly and not components within the assembly (see “Note”). If
the user attempts to repair the instrument by replacing individual components within the
assembly, YOKOGAWA assumes no responsibility for any consequences such as
defects in instrument accuracy, functionality, reliability, or user safety hazards.

YOKOGAWA does not offer more detailed maintenance and service information than
that contained in this service manual.

All reasonable efforts have been made to assure the accuracy of the content of this
service manual. However, there may still be errors such as clerical errors or omissions.
YOKOGAWA assumes no responsibility of any kind concerning the accuracy or
contents of this service manual, nor for the consequences of any errors.

All rights reserved. No part of this service manual may be reproduced in any form or by
any means without the express written prior permission of YOKOGAWA. The contents
of this manual are subject to change without notice.

Disk No. SM12
3rd Edition : March 2002 (YK)
All Rights Reserved, Copyright © 1999, Yokogawa Electric Corporation

SM 701410-01E

1

NOTE YOKOGAWA instruments have been designed in a way that the replacement of elec-

tronic parts can be done on an assembly (module) basis by the user. YOKOGAWA
instruments have also been designed in a way that troubleshooting and replacement of
any faulty assembly can be done easily and quickly. Therefore, YOKOGAWA strongly
recommends replacing the entire assembly over replacing parts or components within
the assembly. The reasons are as follows:

• The instruments use high-performance microprocessors, large scale CMOS gate arrays,
and surface-mount components to provide state-of-the-art performance and functions.

• Repair of components can only be performed by specially trained and qualified mainte­nance personnel with special highly-accurate tools, including costly ones.

•When taking the service life and cost of the instruments into consideration, the replace­ment of assemblies offers the user the possibility to use YOKOGAWA instruments more
effectively and economically with a minimum in downtime.

Adobe and Acrobat are trademarks of Adobe system incorporated.

INTRODUCTION

This manual contains information for servicing YOKOGAWA DL7100/DL7200 Series
Digital Oscilloscopes.

NOTE This manual is the third edition, March 2002.

WARNING

This service manual is to be used by properly trained personnel only. To avoid
personal injury, do not perform any servicing unless you are qualified to do so.
Refer to the safety precautions prior to performing any servicing.
Even if servicing is carried out according to this service manual, or by qualified
personnel, YOKOGAWA assumes no responsibility for any result occurring from
that servicing.

SAFETY PRECAUTIONS

The following general safety precautions must be observed during all phases of opera­tion, service, and repair of this instrument. Failure to comply with these precautions or
with specific warnings given elsewhere in this manual violates safety standards of
design, manufacture, and intended use of the instrument.
[Yokogawa Electric Corporation] assumes no liability for the customer’s failure to
comply with these requirements.

2

SM 701410-01E

General definitions of safety symbols used on equipment and in manuals

Explanation: To avoid injury, death of personnel or damage to the instrument, the

operator must refer to an explanation in the instruction manual.

This symbol represents a functional grounding terminal. Such terminals should not be
used as a “protective grounding terminal”.

WARNING

CAUTION

WARNING

A WARNING sign denotes a hazard. It calls attention to a procedure, practice,
condition or the like, which, if not correctly performed or adhered to, could result
in injury or death of personnel.

A CAUTION sign denotes a hazard. It calls attention to a procedure, practice,
condition or the like, which, if not correctly performed or adhered to, could result
in damage to or destruction of part of the product.

Power Supply

Ensure the source voltage matches the voltage of the power supply before
turning ON the power.

Power Cord and Plug

To prevent an electric shock or fire, be sure to use the power supply cord
supplied by YOKOGAWA. The main power plug must be plugged in an outlet
with a protective grounding terminal. Do not invalidate protection by using an
extension cord without protective grounding.

Protective Grounding

The protective grounding terminal must be connected to ground to prevent an
electric shock before turning ON the power.

Necessity of Protective Grounding

Never cut off the internal or external protective grounding wire or disconnect the
wiring of the protective grounding terminal. Doing so poses a potential shock
hazard.

Defects in Protective Grounding or Fuses

Do not operate the instrument if you suspect the protective grounding or a fuse
might be defective.

Fuse

To prevent a fire, make sure to use fuses with the specified standard (current,
voltage, type). Before replacing the fuses, turn OFF the power and disconnect
the power source. Do not use a different fuse or short-circuit the fuse holder.

SM 701410-01E

3

Do Not Operate Near Flammable Materials

Do not operate the instrument in the presence of flammable liquids or vapors.
Operation of any electrical instrument in such an environment constitutes a
safety hazard.

Do Not Remove Any Covers

Some areas inside the instrument carry high voltage. Do not remove any cover,
especially if the power supply is connected. The cover should be removed by
qualified personnel only.

External Connection

To ground safely, connect the protective grounding before connecting the
instrument to a measurement or control unit.

HOW TO USE THIS MANUAL

This manual is meant to be used by qualified personnel only. Make sure to read the
safety precautions at the beginning of this manual as well as the warnings and cautions
contained in the chapters relevant to any servicing you may be carrying out.

This manual contains the following chapters:

1 GENERAL INFORMATION

Provides an introduction, and describes safety considerations.

2 PERFORMANCE TEST

Describes the tests for checking the performance of the instrument.

3 ADJUSTMENTS

Describes the adjustments which can be performed by users.

4 PRINCIPLES OF OPERATION

Provides function block diagrams and describes the principles of operation.

5 TROUBLESHOOTING

Describes procedures for troubleshooting and how to proceed in case parts need to be
replaced.

6 SCHEMATIC DIAGRAM

Provides a system configuration diagram.

7 CUSTOMER MAINTENANCE PARTS LIST

Contains exploded views and a list of replaceable parts.

Specifications are not included in this manual; for specifications, refer to IM 701410­01E.

4

SM 701410-01E

CONTENTS

IMPORTANT NOTICE TO THE USER .................................................................................... 1

INTRODUCTION ....................................................................................................................3

SAFETY PRECAUTIONS........................................................................................................3

HOW TO USE THIS MANUAL .................................................................................................4

Chapter 1 GENERAL INFORMATION

1.1 Introduction............................................................................................. 1 - 1

1.2 Safety Considerations ............................................................................ 1 - 1

Chapter 2 PERFORMANCE TEST

2.1 Introduction............................................................................................. 2 - 1

2.2 Test Environment.................................................................................... 2 - 1

2.3 Equipment Required for Performance Test ............................................ 2 - 1

2.4 Self_Diagnosis ....................................................................................... 2 - 2

2.5 Vertical Axis DC Voltage Accuracy Test.................................................. 2 - 2

2.6 Frequency Response Test...................................................................... 2 - 4

2.7 Time-Base Accuracy Test ....................................................................... 2 - 5

2.8 Trigger Sensitivity Test ........................................................................... 2 - 7

2.9 Trigger Accuracy Test ............................................................................. 2 - 8

2.10 Logic Input Function Test ................................................................... 2 - 10

Chapter 3 ADJUSTMENTS

3.1 Introduction............................................................................................. 3 - 1

3.2 Test Environment.................................................................................... 3 - 1

3.3 Equipment Required............................................................................... 3 - 2

3.4 DC Gain Adjustment on the AD board .................................................... 3 - 2

3.5 Flatness Adjustment on the Analog Board ............................................ 3 - 6

1

2

3

4

5

6

7

Chapter 4 PRINCIPLES OF OPERATION

4.1 Introduction............................................................................................. 4 - 1

4.2 Function of Each Assembly.................................................................... 4 - 1

4.3 Function of Each ASIC ........................................................................... 4 - 5

Chapter 5 TROUBLESHOOTING

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

5.2 Flowchart................................................................................................ 5 - 1

5.3 Power Supply Secondary Voltage.......................................................... 5 - 5

5.4 Self Test.................................................................................................. 5 - 6

5.4.1 Key Board Test ........................................................................................................ 5 - 7

5.4.2 Memory Test .............................................................................................................. 5 - 7

5.4.3 FDD Test ................................................................................................................... 5 - 8

5.4.4 SCSI Test .................................................................................................................. 5 - 8

5.4.5 Printer Test ................................................................................................................ 5 - 9

5.4.6 Accuracy Test.......................................................................................................... 5 - 10

5.4.7 PC Card Test (Option)............................................................................................. 5 - 10

Chapter 6 SCHEMATIC DIAGRAM

Chapter 7 CUSTOMER MAINTENANCE PARTS LIST

7.1 Customer Maintenance Parts List .......................................................... 7 - 1

7.2 Standard Accessories............................................................................. 7 - 4

SM 701410-01E

5

Chapter 1 GENERAL INFORMATION

This chapter provides the general information.

1.1 Introduction

1.2 Safety Considerations

1.1 Introduction

This manual describes servicing information on any YOKOGAWA DL7100/DL7200
Series Digital Oscilloscopes.
This chapter contains information required for using this manual and information that
must be read before starting servicing of DL7100/DL7200 series instruments.

1.2 Safety Considerations

You must thoroughly read the safety precautions at the beginning of this manual. Also
fully read the warnings and cautions contained in each chapter.

1.1 Introduction

1

GENERAL INFORMATION

SM 701410-01E

1 - 1

Chapter 2 PERFORMANCE TEST

Contents of This Chapter

2.1 Introduction

2.1 Introduction

2.2 Test Environment

2.3 Equipment Required

2.4 Self-Diagnosis

2.5 Vertical Axis DC Voltage Accuracy Test

2.6 Frequency Response Test

2.7 Time-Base Accuracy Test

2.8 Trigger Sensitivity Test

2.9 Trigger Accuracy Test

2.10 Logic Input Function Test

2.1 Introduction

The aim of the test is to check the basic performance of the instrument. The order of the
test procedures is just for convenience and does not have any significant meaning.
Please use recommended equipment or their equivalents.

2.2 Test Environment

2

PERFORMANCE TEST

1) Operate the instrument under the following conditions.

• Ambient temperature: 23 ±2 °C

• Humidity: 55 ±10% RH

•Voltage of power supply: Specified voltage ±1%

• Frequency of power supply: Specified frequency ±1%

2) Warm up time

•More than 30 minutes after turning ON the instrument.

• Confirm that self-calibration is correctly executed after the 30 minute warm up.

(Be sure to Pay attention to the warm up time of all equipment that will be used in the
test.)

2.3 Equipment Required for Performance Test

Equipment Qty Mandatory Specifications Recommended

Calibrator 1 Accuracy ±0.05% WAVETEK 9500

Output voltage –40 V to 40 V
Output resolution 1 mV
Output frequency range 0.1 MHz to 500 MHz

Programmable head 1 WAVETEK 9520

SM 701410-01E

2 - 1

2.4 Self_Diagnosis

Equipment Required

None

Procedure

Follow the procedure described in section 14.3, “Self-Diagnosis Test (Self-Test)” of the
instruction manual (IM 701410-01E) .

2.5 Vertical Axis DC Voltage Accuracy Test

Specifications

2 mV/div to 50 mV/div: ±(1.5% of 8 div.+0.2 mV)
100 mV/div to 500 mV/div: ±(1.5% of 8 div.+2 mV)
1 V/div to 10 V/div: ±(1.5% of 8 div.+20 mV)

Permissible Range

Range Tolerance

2 mV/div ±0.44 mV
5 mV/div ±0.8 mV
10 mV/div ±1.4 mV
20 mV/div ±2.6 mV
50 mV/div ±6.2 mV
100 mV/div ±14 mV
200 mV/div ±26 mV
500 mV/div ±62 mV
1 V/div ±140 mV
2 V/div ±260 mV
5 V/div ±620 mV
10 V/div ±1.22 V

Equipment Required

Equipment Qty Mandatory Specifications Recommended

Calibrator 1 Accuracy ±0.05% WAVETEK 9500

Output voltage –40 V to 40 V
Output resolution 1 mV

Programmable Head 1 WAVETEK 9520

Connection

DL7100/DL7200

Calibrator

Programable Head

SM 701410-01E2 - 2

2.4 Self diagnosis

Procedure

1) Turn on the power source of the DL7100/DL7200. After warm-up press the MISC key,

followed by Calibration soft key, then press the Cal Exec soft key to calibrate the
instrument.
Next, press the INITIALIZE key, then press the Initialize soft key to initialize the
settings.

2) Set the DL7100/DL7200 oscilloscope as shown below.

VERTICAL (for all channels)

Coupling DC1 MΩ
V/div According to the inspection item below
Probe 1:1

HORIZONTAL

T/div 1 ms/div

TRIGGER

Mode Auto

ACQ

Mode Box Average
Count Infinite

DISPLAY

Format Single

MEASURE

Mode ON
Item Set Up ▼ (Set to channel to be measured)

Select A vg.
Time Range 1 –5 div
Time Range 2 +5 div

2

PERFORMANCE TEST

3) Input the following voltages from the voltage generator to the DL7100/DL7200 to be
tested, read the indication on the DL7100/DL7200 (value of Avg), and compare the
reading with the tolerance.

Measurement Range Test input voltage Tolerance

2 mV/div –8, 0, +8 mV ±0.44 mV
5 mV/div –20, 0, +20 mV ±0.8 mV
10 mV/div –40, 0, +40 mV ±1.4 mV
20 mV/div –80, 0, +80 mV ±2.6 mV
50 mV/div –200, 0, +200 mV ±6.2 mV
100 mV/div –400, 0, +400 mV ±14 mV
200 mV/div –800, 0, +800 mV ±26 mV
500 mV/div –2, 0, +2 V ±62 mV
1 V/div –4, 0, +4 V ±140 mV
2 V/div –8, 0, +8 V ±260 mV
5 V/div –20, 0, +20 V ±620 mV
10 V/div –40, 0, +40 V ±1.22 V

4) Test all channels in the same manner.

SM 701410-01E

2 - 3

2.6 Frequency Response Test

Specifications

DC50 Ω (1 V/div to 10 mV/div) DC to 500 MHz (–3 dB point)
DC50 Ω (2 mV/div and 5 mV/div) DC to 400 MHz (–3 dB point)

Permissible Range

Range Input Amplitude (p-p) Input Frequency Permissible Range (Sdev)

1 V/div 5 V 500 MHz 1.26 V to 1.98 V
200 mV/div 1.2 V 500 MHz 301 mV to 476 mV
50 mV/div 0.3 V 500 MHz 75.1 mV to 119 mV
5 mV/div 30 mV 400 MHz 7.51 mV to 11.9 mV
2 mV/div 12 mV 400 MHz 3.01 mV to 4.76 mV

Equipment Required

Equipment Qty Mandatory Specifications Recommended

Calibrator 1 Output voltage 0 V to 10 V WAVETEK 9500

Programmable Head 1 WAVETEK 9520

Connection

Output resolution 1 mV
Output frequency range 0.1 MHz to 500 MHz

DL7100/DL7200

Calibrator

Programable Head

Procedure

1) Turn on the power source of the DL7100/DL7200. After warm-up press the MISC key,
followed by Calibration soft key, then press the Cal Exec soft key to calibrate the
instrument.
Next, press the INITIALIZE key, then press the Initialize soft key to initialize the
settings.

2) Set the DL7100/DL7200 as shown below.
VERTICAL (for all channel)

Coupling DC50 Ω
V/div Set this according to following measurement

conditions

Probe 1:1

HORIZONTAL

T/div 2 ns/div

TRIGGER SIMPLE

Mode Normal
SIMPLE

SM 701410-01E2 - 4

2.6 Frequency Response Test

Source (Channel to be tested)

ACQ

Mode Average
Count Infinite
Weight 4
Record Length 1 k

DISPLAY

Format Single

MEASURE

Mode ON
Item Set up ▼ (Set to channel to be tested)

Select Sdev
Time Range 1 –5.00 div
Time Range 2 +5.00 div

3) Input voltages as listed on the following table to the DL7100/DL7200 you are testing,
and check if the automatically measured value of waveform parameters (Sdev) is within
the permissible range.

2

PERFORMANCE TEST

Range Input Amplitude (p-p) Input Frequency Permissible Range (Sdev)

1 V/div 5 V 500 MHz 1.26 V to 1.98 V
200 mV/div 1.2 V 500 MHz 301 mV to 476 mV
50 mV/div 0.3 V 500 MHz 75.1 mV to 119 mV
5 mV/div 30 mV 400 MHz 7.51 mV to 11.9 mV
2 mV/div 12 mV 400 MHz 3.01 mV to 4.76 mV

4) Test all channels in the same manner.

2.7 Time-Base Accuracy Test

Specifications

±0.005%

Permissible Range

Time Range Input Frequency Permissible Range

2 µs/div 500.2 MHz 200±25 kHz
5 µs/div 200.1 MHz 100±10 kHz

Equipment Required

Equipment Qty Mandatory Specifications Recommended

Calibrator 1 300mVp-p, sine wave WAVETEK 9500

Programmable Head 1 WAVETEK 9520

200.1MHz and 500.2MHz

SM 701410-01E

2 - 5

Connection

DL7100/DL7200

Calibrator

Programable Head

Procedure

1) Turn on the power source of the DL7100/DL7200. After warm-up press the MISC key,
followed by Calibration soft key, then press the Cal Exec soft key to calibrate the
instrument.
Next, press the INITIALIZE key, then press the Initialize soft key to initialize the
settings.

2) Set the DL7100/DL7200 as shown below.
VERTICAL

CH1

V/div 50 mV/div
Coupling DC50 Ω
Probe 1:1

HORIZONTAL

T/div According to the inspection item below

Display

Format Single

ACQ

Record Length 10k

MEASURE

Mode ON
Item Set up ▼

CH1 Select Freq

3) Input a 300 mVp-p sine wave signal with the input frequency listed in the table below to
the DL7100/DL7200 you are testing, and check if the automatically measured wave­form parameters (Freq) are within the permissible range.

Time Range Input Frequency Permissible Range (Freq)

2 µs/div 500.2 MHz 200±25 kHz
5 µs/div 200.1 MHz 100±10 kHz

SM 701410-01E2 - 6

2.8 Trigger Sensitivity Test

Specifications

DC to 500 MHz: 1 divp-p on the screen

2.8 Trigger Sensitivity Test

Permissible Range

500 mV/div 500 MHz 1 divp-p on the screen

Equipment Required

Equipment Qty Mandatory Specifications Recommended

Calibrator 1 500 mVp-p, 500 MHz, sine wave WAVETEK 9500
Programmable Head 1 WAVETEK 9520

Connection

DL7100/DL7200

Calibrator

Programable Head

2

PERFORMANCE TEST

Procedure

1) Turn on the power source of the DL7100/DL7200. After warm-up press the MISC key,

followed by Calibration soft key, then press the Cal Exec soft key to calibrate the
instrument.
Next, press the INITIALIZE key, then press the Initialize soft key to initialize the
settings.

2) Set the DL7100/DL7200 as shown below.

VERTICAL (for all channels)

V/div 500 mV/div
Coupling DC50 Ω
Probe 1:1

HORIZONTAL

T/div 1ns/div

TRIGGER

Mode Normal
ENHANCED

Type Pattern
Set Pattern ▼

Clock CH (Set to channel to be measured)
Slope ↑ (channel to be measured)

X (the other channel)

SM 701410-01E

2 - 7

Condition True

Level / Coupling ▼

Level 0 mV
Coupling DC

DISPLAY

Format Single

ACQ

Record Length 1 k
Mode Average
Count Infinite
Weight 4

3) Input a sine wave signal of 500 mVp-p 500 MHz to the DL7100/DL7200, and confirm
that the waveform stabilizes.

NOTE If the trigger is not activated, adjust the trigger lever within ±250 mV until the trigger is

activated.

4) Test all channels in the same manner.

2.9 Trigger Accuracy Test

Specifications

±(1 div.+10% of the trigger level)

Permissible Range (when 200 mV/div)

Trigger level Offset Permissible Range

600 mV 600 mV –260 mV ≤ (Vin + Vout) / 2 ≤ 260 mV
–600 mV –600 mV –260 mV ≤ (Vin + Vout) / 2 ≤ 260 mV

Equipment Required

Equipment Qty Mandatory Specifications Recommended

Calibrator 1 400mVp-p, 2kHz, sine wave WAVETEK 9500
Programmable head 1 WAVETEK 9520

Connection

Calibrator

DL7100/DL7200

Programable Head

SM 701410-01E2 - 8

2.9 Trigger Accuracy Test

Procedure

1) Turn on the power source of the DL7100/DL7200. After warm-up press the MISC key,

followed by Calibration soft key, then press the Cal Exec soft key to calibrate the
instrument.
Next, press the INITIALIZE key, then press the Initialize soft key to initialize the
settings.

2) Set the DL7100/DL7200 oscilloscope as follows.

VERTICAL (for all channels)

V/div 200 mV/div
Probe 1:1
Band Width 20 MHz
Offset –600 mV, 600 mV

HORIZONTAL

T/div 100 µs/div

TRIGGER

ENHANCED

Type OR
Window ON
Set Pattern ▼

IN, OUT (channel to be measured)
– (the other channel)

Level / Coupling ▼

Center –600 mV, 600 mV
Width 1.2 V

DISPLAY

Format Single

CURSOR

Type Marker
Position 0.0 div

2

PERFORMANCE TEST

SM 701410-01E

3) Input a sine wave signal of 400 mVp-p, 2 kHz to the DL7100/DL7200 oscilloscope, and

use cursors to read the voltage of the waveform at the trigger position. Set Vin for
Polarity IN, Vout for Polarity out, and check if (Vin+Vout)/2 is within the permissible
range.

Trigger level Offset Permissible Range

600 mV 600 mV –260 mV ≤ (Vin + Vout) / 2 ≤ 260mV
–600 mV –600 mV –260 mV ≤ (Vin + Vout) / 2 ≤ 260mV

4) Test all channels in the same manner.

2 - 9

2.10 Logic Input Function Test

Equipment Required

Equipment Qty Mandatory Specifications Recommended

Probe 1 400 MHz frequency range Yokogawa 700988
Logic Probe 2 8 bit Yokogawa 700985

Connection

DL7100/DL7200

GND (Black)
Input (Red)

Procedure

1) Turn on the power of the DL7100/DL7200 and press the INITIALIZE key, then press
the Initialize soft key to initialize the settings.

2) Press the AUTO SETUP key and select the Auto Setup soft key.

3) Press the LOGIC key, press the Mode function key, then select the ON.

4) Press the Select function key and select the Pod A soft key.

5) Press the Level function key, select the User soft key, and turn the jog shuttle to 0.5V.

6) Set POD B in the same manner as POD A.

7) Press the ENHANCED key, press the Type function key, and select the Logic soft key.

8) Press the Set Pattern function key, set the Clock CH to None and set Condition to
Enter.

9) Set the 1st bit status of POD A to H. The other bits and the bits of the other POD are set
to X.

10) Connect the 1st bit probe of POD A to the PROBE COMPENSATION output terminal.

11) Check whether the trigger activated correctly. If the logic input signal is displayed,
check the waveform on the screen.

12) Change the connection of the probe and test the other bits in the same manner.

13) Change the connection of POD B and test POD B in the same manner.

SM 701410-01E2 - 10

Chapter 3 ADJUSTMENTS

Contents of This Chapter

3.1 Introduction

3.2 Test Environment

3.3 Equipment Required

3.4 DC Gain Adjustment on the AD board

3.5 Flatness Adjustment on the Analog board

3.1 Introduction

The main unit cover must be removed before adjusting the DL7100/DL7200 read the
warning and caution below before doing so.

3.1 Introduction

3

ADJUSTMENTS

WARNING

CAUTION

Circuit patterns of the printed circuit board are exposed. Be careful when handling so
that hands or fingers are not injured by the protruding pins.

• Circuit patterns of the printed circuit board are exposed. If these patterns touch other

metallic materials, electrical shorting will occur, causing the circuit to be damaged or
burnt.

• It is sometimes necessary to turn the DL7100/DL7200 upside down for adjustment. Do

not drop, or allow the instrument to fall over.

•When feeding power with the DL7100/DL7200’s cover open, apply a flow of air to the

AD board.

3.2 Test Environment

1) Operate the instrument under the following conditions.

• Ambient temperature: 23 ±2 ˚C

• Humidity: 55 ±10 % RH

•Voltage of power supply: Specified voltage ±1 %

• Frequency of power supply: Specified frequency ±1 %

SM 701410-01E

2) Warm up time

•More than 30 minutes after tuning ON the instrument.

• Confirm that self calibration is correctly executed after a 30 minute warm up.

(Be sure to pay attention to the warm up time of all equipment that will be used in the
test.)

3 - 1

3.3 Equipment Required

Table 3.1 Equipment required

Equipment Critical Specification Recommended

Calibrator DC WAVETEK 9500
Programmable Head Output Level : 1 V WAVETEK 9520

Accuracy : < 0.02%
Square wave
Frequency : 10 kHz
Output Level : > 60 Vp-p

NOTE The values shown in the specification column are those set in this service manual.

These values do not indicate the performances of the recommended equipment and
tools. Therefore, non-designated equipment and tools which satisfy the specifications
may be permitted for use.

3.4 DC Gain Adjustment on the AD board

Procedure

1) Remove the main unit cover.

2) Allow the unit to warm up for 10 minutes or more.

3) Connect each instrument as shown in Figure 3.1 Connection method.

DL7100/DL7200

Calibrator

Programable Head

Figure 3.1 Connection Method

4) Press the INITIALIZE key and select the Initialize soft key to execute initialization.

5) Press the MISC key and select the Calibration soft key.

6) Press the Cal Exec soft key to perform calibration.

3 - 2 SM 701410-01E

3.4 DC Gain Adjustment on the AD board

7) Set up the DL7100/DL7200 and calibrator as follows.

DL7100/DL7200 VERTICAL (for all channels)

V/div 2 mV/div
Position 0 div
Probe 1:1
Offset +1.000 V
Bandwidth 20 MHz

HORIZONTAL

T/div 1 ms/div

TRIGGER

Mode Auto

ACQ

Mode Box Average
Count Infinite

DISPLAY

Format Single

MEASURE

Mode ON
Item Set Up ▼(Set to channel to be measured)

Select A vg.
Time Range 1 -5 div
Time Range 2 +5 div

Calibrator DC Output Level +1.0000 V

3

ADJUSTMENTS

8) Adjust the variable resistor (refer to table 3.2, “ Adjustment Point” and figure 3.2,3.3,
“Adjustment Point Location Diagram”) corresponding to each channel so that the DC
wave form fits within 1 V±1 mV as shown in figure 3.4, “Observed Waveform.”

9) Perform the adjustment of 7) for all channels.

Table 3.2 Adjustment Point

Channel Adjustment Point

ch1 R707
ch2 R714
ch3 R721
ch4 R728

SM 701410-01E

3 - 3

R707

R714

R721

R728

Figure 3.2 Adjustment Point Location Diagram (DL7100)

3 - 4 SM 701410-01E

3.4 DC Gain Adjustment on the AD board

R707

R714

R721

R728

3

ADJUSTMENTS

Figure 3.3 Adjustment Point Location Diagram (DL7200)

SM 701410-01E

3 - 5

Figure 3.4 Observed Waveform

3.5 Flatness Adjustment on the Analog Board

NOTE Before performing this flatness adjustment, the DC gain adjustment on the AD board

must have been completed.

Procedure

1) Remove the main unit cover.

2) Turn on the power and allow the unit to warm up for 10 minuets or more.

3) Connect each instrument as shown in figure 3.5, “Connection Method.”

DL7100/DL7200

Calibrator

Programable Head

Figure 3.5 Connection Method

4) Press the INITIALIZE key and select the Initialize soft key to execute initialization.

5) Press the MISC key and select the Calibration soft key.

6) Select the Cal Exec soft key to perform calibration.

3 - 6 SM 701410-01E

3.5 Flatness Adjustment on the Analog board

7) For adjustment of the /10 range, set up the DL7100/DL7200 oscilloscope and calibrator
as follows.
DL7100/DL7200 VERTICAL (for all channels)

V/div 100 mV/div
Position 0 div
Probe 1:1

HORIZONTAL

T/div 10 µs/div

TRIGGER

Mode Auto

ACQ

Mode Box Average
Count Infinite

DISPLAY

Format Single

Calibrator Wave Form Square wave

Frequency 10 kHz
Amplitude 600 mVp-p

8) Adjust the variable capacitors CV101 and CV201, (refer to figure 3.6, “Adjustment
Point Location Diagram”) so that the top of the waveform becomes flat as shown in
figure 3.7, “Observed Waveform.” The flatness of the waveform must be fitted within
±0.1 div.

9) For adjustment of the /100 range, set up the DL7100/DL7200 oscilloscope and calibra­tor as follows.
DL7100/DL7200 VERTICAL (for all channels)

V/div 1 V/div
Position 0 div
Probe 1:1

HORIZONTAL

T/div 10 µs/div

TRIGGER

Mode Auto

ACQ

Mode Box Average
Count Infinite

DISPLAY

Format Single

Calibrator Wave Form Square wave

Frequency 10 kHz
Amplitude 6 Vp-p

10) Adjust the variable capacitors CV102 and CV202 (refer to figure 3.6, “Adjustment
Point Location Diagram”) so that the top of the waveform becomes flat as shown in
figure 3.7, “Observed Waveform.” The flatness of the waveform must be fitted within
±0.1 div.

3

ADJUSTMENTS

SM 701410-01E

3 - 7

11)For adjustment of the /200 range, set up the DL7100/DL7200 oscilloscope and calibra­tor as follows.
DL7100/DL7200 VERTICAL (for all channels)

V/div 10 V/div
Position 0 div
Probe 1:1

HORIZONTAL

T/div 10 µs/div

TRIGGER

Mode Auto

ACQ

Mode Box Average
Count Infinite

DISPLAY

Format Single

Calibrator Wave Form Square wave

Frequency 10 kHz
Amplitude 60 Vp-p

12)Adjust the variable capacitors CV103 and CV203 (refer to figure 3.6, “Adjustment
Point Location Diagram” ) so that the top of the waveform becomes flat as shown in
figure 3.7, “Observed Waveform.” The flatness of the waveform must be come within
±0.1 div.

CV202

The assembly number differs dependeing on
the date of manufacture as follows:
During or before July, 2001: B9969MA
July, 2001 – December, 2001: B9989MA
After December, 2001: B9989ML

CV203

CV103

CV102

CV101

CV201

Figure 3.6 Adjustment Point Location Diagram

3 - 8 SM 701410-01E

Figure 3.7 Observed Waveform

3

ADJUSTMENTS

SM 701410-01E

3 - 9

4.1 Introduction

Chapter 4 PRINCIPLES OF OPERATION

Contents of This Chapter

4.1 Introduction

4.2 Function of each assembly

4.3 Function of Each ASIC

4.1 Introduction

The block diagrams of the DL7100 are shown in figure 4.1 and figure 4.2.
The block diagrams of the DL7200 are shown in figure 4.3 and figure 4.4.
Figure 4.1 and figure 4.3 are block diagrams of the circuit from the analog input to the
data acquisition circuit including the attenuator, one-chip amplifier, analog multiplexer,
A/D converter, trigger comparator, trigger circuit, and the ring buffer memory and its
controller.
Figure 4.2 and figure 4.4 are block diagrams of (1) the data processing section which
processes the acquired data and displays the waveform, (2) the CPU, and (3) the
peripheral circuitry. In addition, figure 4.2 and figure 4.4 include a block diagram of the
logic input circuit.

4

PRINCIPLE OF THE OPERATION

4.2 Function of Each Assembly

This section describes the ATT board assembly and AFC board assembly.

(1) Analog Board Assembly

The analog board assembly has a coupling switch for AC/DC, 1 MΩ/50 Ω, and GND/
Measure and a switch circuit for the attenuator (1:1/10:1/100:1/200:1). Relays are used
to make the switch. In addition, a one-chip amplifier IC and an analog multiplexer IC
are onboard.

The one-chip amplifier IC has a gain switch circuit, a low-pass filter circuit (external
capacitor), a trigger coupling circuit (external capacitor), and a trigger bandwidth
limiting circuit (external capacitor). In addition, the input offset voltage and the trigger
level are varied using an external DC voltage input. The frequency bandwidth of the IC
is approximately 600 MHz.

As indicated in figure 4.1, the vertical sensitivity from 10 V/div to 2 mV/div is achieved
by switching the gain on the attenuator and the one-chip amplifier IC.

The analog multiplexer IC is used to achieve the interleave operation.
During the interleave operation, the input signal of CH1 (CH3) is supplied to the A/D
converter of CH2 (CH4).
The frequency bandwidth of the IC is approximately 2 GHz.

SM 701410-01E

The above-mentioned control signal, offset, and DC voltage for the trigger level are
supplied by the analog front-end controller (AFC) on the AD board assembly.

4 - 1

Table 4.1 Setting Range and Amplifying Level

Setting Range Attenuator Division Ratio Amplifying Rate

2 mV/div 1/1 x25
5 mV/div 1/1 x10
10 mV/div 1/1 x5
20 mV/div 1/1 x2.5
50 mV/div 1/1 x1
100 mV/div 1/10 x5
200 mV/div 1/10 x2.5
500 mV/div 1/10 x1
1 V/div 1/100 x5
2 V/div 1/100 x2.5
5 V/div 1/100 x1
10 V/div 1/200 x1

The setting range here is for the 1:1 probe setting.

(2) AD Board Assembly

The AD board assembly has the time base, trigger, A/D converter, ring buffer controller
(RBC), and analog control circuits onboard.

The time base is of a PLL configuration. 1 GHz and 800 MHz can be switched. On the
DL7100, the frequency of the clock is converted to 500 MHz or 400 MHz using high­speed ECL logic and distributed to each channel. When in interleave mode, the clock
for CH2 and CH4 is delayed by 1 ns with respect to the clock for CH1 and CH3,
respectively. On the DL7200, the 1-GHz or 800-MHz clock is distributed to each
channel without any frequency conversion. When in interleave mode, the clock for
CH2 and CH4 is delayed by 500 ps with respect to the clock for CH1 and CH3, respec­tively. For making minute time measurements of phase difference between the trigger
and sampling clock (needed during repetitive sampling mode, for example), the T-V
converter (TVC) is used.

The trigger section consists of a comparator, fast trigger logic (FTL), and pulse width
detector (PWD). It also has a TV trigger circuit used only on CH1. The comparator has
a window comparator function that allows window triggering. The window width is
controlled by an external DC voltage input. The frequency bandwidth of the compara­tor IC is 1 GHz.

On the DL7100, the A/D converter operates at 500 MHz only when the sampling rate is
500 MS/s or when in 1 GS/s interleave mode. In all other cases, the A/D converter
operates at 400 MHz. Sampling rates of 200 MS/s or lower are attained by extracting a
portion of the data sampled at 400 MHz using the RBC. On the DL7200, the A/D
converter operates at 1 GHz only when the sampling rate is 500 MS/s or 1 GS/s or when
in 2 GS/s interleave mode. In all other cases, the A/D converter operates at 800 MHz.
A sampling rate of 500 MS/s is attained by extracting a portion of the data sampled at 1
GHz using the RBC. Sampling rates of 200 MS/s or lower are attained by extracting a
portion of the data sampled at 800 MHz using the RBC.

The RBC performs primary processing such as the above-mentioned data extraction of
sampled data, envelope, and box averaging, then stores the data in the ring buffer
memory. The written data are transferred to the acquisition memory interface (AMI) on
the CPU board assembly according to the trigger address.

4 - 2

The analog control circuit consists of an analog front-end controller (AFC), a PWM D/
A converter, and a serial/parallel converter. This circuit controls the analog section of
the analog board assembly and the AD board assembly.

SM 701410-01E

4.2 Function of each assembly

(3) Ring Buffer Memory Board Assembly

The ring buffer memory board assembly consists of a fast bus buffer (FBB) and ring
buffer memory (fast SRAM).
The 701410 and 701420 use a 1-Mbit SRAM and a 4-Mbit SRAM, respectively.
The 701430 and 701440 have twice the amount of SRAM that the 701410 and 701420
have, respectively.

(4) CPU Board Assembly

The CPU board assembly consists of the secondary data processing section, a display
section (for displaying waveforms and other information), the CPU, and its peripheral
circuits.

The secondary data processing section consists of an acquisition memory interface
(AMI), work memory (PBSRAM), and the acquisition memory on the ACQ memory
board assembly. The AMI processes the data (averaging, for example) that are trans­ferred from the RBC on the AD board assembly and stores the result in the acquisition
memory. Then, the AMI converts the stored data to display data by performing addi­tional processing such as compression and interpolation. The resultant data are trans­ferred to the graphic control process (GCP) according to the display update interval.
The AMI also has the computation function (addition, subtraction, multiplication,
division, differentiation, integration, etc.) and auxiliary functions such as automated
measurement of waveform parameters.

The display section consists of a GCP, graphic memory (synchronous GRAM), charac­ter memory (fast SRAM), and VGA VIDEO OUT circuits. The GCP writes the wave­form data that are transferred from the AMI (includes the AMI on the logic board
assembly) to the graphic memory. It synthesizes the contents of the graphic memory
and the character memory and displays them on the TFT color LCD. The GCP also
controls the built-in printer.

The CPU is Hitachi's HD6417709A operating at 66 MHz. The CPU peripheral circuits
include the main memory (synchronous DRAM), flash memory, backup memory, a
GPIB controller, a SCSI controller, an FDD controller, a Centronics interface, and an
RS-232 interface. The CPU I/O interface (CIO) controls a part of these peripheral
circuits.

4

PRINCIPLE OF THE OPERATION

SM 701410-01E

(5) ACQ Memory Board Assembly

The ACQ memory board assembly has an acquisition memory (synchronous DRAM)
onboard. It is controlled by the acquisition memory interface (AMI) on the CPU board
assembly. The acquisition memory uses a 64-Mbit synchronous DRAM. The 701430 and
701440 uses twice the amount of 64-Mbit synchronous RAMs as the 701410 and 701420.

(6) Logic Board Assembly (Option)

The logic board assembly consists of an interface section of the logic probe, a data
acquisition section, and a logic trigger circuit. The interface section supplies power to
the logic probe and provides a buffer for the logic input. Similar to the analog input
section, the data acquisition section has an RBC, a ring buffer memory, an AMI,
acquisition memory, and a work memory. For the ring buffer memory, a 1-Mbit SRAM
is used for option /N1, /N3 and a 4-Mbit SRAM is used for option /N2, /N4.
Option /N3 and option /N4 use twice the amount of SRAM as option /N1 and option /
N2, respectively.

4 - 3

(7) Rear Board Assembly

The rear board assembly provides EXT CLOCK IN/EXT TRIG IN/TRIG GATE IN and
TRIG OUT.
This board supplies the power source (+12V, -12V) for the active probes.

(8) Key Board Assembly

Key switches, LEDs, the rotary encoder, and the jog shuttle are installed on the key
board assembly.

(9) Line Trigger Board Assembly

The AC Line input from the inlet is supplied to the power supply unit across the switch
on the line trigger board assembly.
This assembly also contains the line trigger circuit.

(10) Power Board Assembly

The power board assembly distributes the DC voltage output from the power supply
unit to the AD board assembly, ring buffer memory board assembly, and CPU board
assembly.

(11) Bus Board Assembly

The CPU board assembly and the AD board assembly exchange signals via the bus
board assembly.

(12) LCD Board Assembly

The LCD board assembly converts the connector of the LCD signal cable.

(13) LCD Assembly

8.4-inch color TFT LC display
Full display resolution: 640 x 480
Waveform display resolution: 500 x 384

(14) Printer Assembly (Option)

The printer is of a thermal sensitivity type that prints 8 dots per mm and 832 dots per
line. A hardcopy of the display is printed in approximately 12 seconds.

(15) FDD Assembly

The FDD assembly supports 3.5-inch floppy disks with the formats of 640 KB, 720 KB,

1.2 MB, and 1.44 MB.

(16) Ethernet + PC Card Interface Board Assembly (option)

Option /C9 consists of a PC card interface section. Option /C10 consists of a PC card
interface section and an Ethernet interface section. The PC card interface section has a
PC card slot and a PC card controller. The Ethernet interface section has an Ethernet
connector and a LAN (local area network) controller. These interfaces are controlled by
the CPU and CPU I/O interface (CIO) that are on the CPU board assembly.

4 - 4

(17) OPT TRIG Board Assembly (option)

Option /F7 consists of a CANBus Trigger section. The OPT TRIG Board Assembly
provide CANBus Trigger signal.

SM 701410-01E

4.3 Function of Each ASIC

The following items describe the IC and the gate array function used in each assembly.

(1) Analog Front-End Controller (AFC)

The AFC is a Bi-CMOS gate array. Its main functions are controlling the analog front­end circuit and assisting the trigger circuit. It has a PWM signal output circuit used for
D/A conversion, a parallel port, a serial port, a trigger hold-off circuit, an auto trigger
circuit, a TV trigger generator, a fast counter, and a slow counter, etc.

(2) Fast Trigger Logic (FTL)

The FTL is an ECL gate array. Its main functions include generation of trigger signals
according to the trigger functions, trigger hold-off function, and the control of the time­to-voltage converter (TVC).

(3) Pulse Width Detector (PWD)

The PWD is an analog IC. Using an internally-startable oscillator and an external
counter (AFC), it detects the pulse width for width triggering.

(4) Time-to-Voltage Converter (TVC)

This is the analog IC that measures the internal sampling clock and trigger time, and
coverts time to voltage.

4.3 Function of Each ASIC

4

PRINCIPLE OF THE OPERATION

(5) Ring Buffer Memory Controller (RBC)

The RBC is a Bi-CMOS gate array. It performs primary processing of the data such as
the extraction of the sampled data, envelope, and box averaging. It also provides
functions for controlling the ring buffer memory and the interface to the acquisition
memory interface (AMI).

(6) Fast Bus Buffer (FBB)

The FBB is a CMOS gate array. Its function is to provide a buffer for the data bus,
address bus, and control signal between the ring buffer memory controller (RBC) and
the ring buffer memory.

(7) Acquisition Memory Interface (AMI)

The AMI is a CMOS gate array. Its functions include interface to the ring buffer
memory controller (RBC), interface to the graphic control processor (GCP), averaging,
history control, waveform computation, and auxiliary functions for the automated
measurement of waveform parameters.

(8) Graphic Control Processor (GCP)

The GCP is a CMOS gate array. Its functions include interface to the acquisition
memory interface (AMI), graphic memory and character memory control, waveform
drawing function (accumulated display, for example), built-in printer control, and
display data generation for the LCD.

SM 701410-01E

(9) CPU I/O Interface (CIO)

The CIO is a CMOS gate array. Its functions include interface to the CPU
(HD6417709A) and the peripheral ICs, keyboard control, LED control, interrupt
control, and DMA selection.

(10) CANBus Trigger Logic (CTL)

The CTL is Field Programmable Gate array. Its function is generation of CANBus
trigger signal.

4 - 5

CH1/CH2

SRAM

SRAM

CH3/CH4

SRAM

SRAM

Signal

Control

FBB

RBC

RBC

FBB

Board Assembly

Ring Buffer Memory

FTL

TVC

Assembly

To Rear Board

*

PWD

AFC

Time Base

Level Converter

AD Board Assembly

*

A/D Converter

To Logic Board

Assembly

Trigger Level

Offset

Filter

(20MHz

100MHz)

TV Trigger

*

Comparator

Line Trigger

*

Assembly

Assembly

From Logic Board

From Bus Board

Assembly

Assembly

To CPU Board

To AD Board

To Ring Buffer

*

*

*

DC

Memory Board Assembly

DC

DC

Analog Board Assembly

one chip Amplifier Multiplexer

Coupling

(GND/MES) ATT

Coupling

(1MΩ/50Ω)

(AC/DC)

Coupling

CH1

CH2

CH3

CH4

Figure 4.1 Block Diagram (Analog Section) of the DL7100

AC/DC

DC/AC/

HFrej

Gain1/1 1/10

1/100 1/200

GND/MES

1MΩ/50Ω

Power Board Assembly

DC

Unit

Power

AC

AC

Line T rigger Boar d Assembl y

4 - 6

SM 701410-01E

(Option)

Printer

4.4 Functions of Each Gate Array

Key Board

Assembly

VGA Video OUT

LCD

GCP

CIO

Graphic

Memory

Memory

Character

FD Drive

FD Controller

CENTRONICS

GPIB

GPIB IF

Backup RAM

SCSI

SCSI IF

CENTRONICS IF

CPU

RS-232

RS-232 IF

DRAM

PC Card (/C9, /C10)

Flash ROM

Ethernet (/C10)

PC CARD IF Board

PC CARD IF

ETHERNET IF

Assembly (/C9)

or

Trigger Logic

*

To AD Board Assembly

Ethernet Board

Assembly (/C10)

LOGIC A

*

From AD Board

RBC

AMI

Assembly

FBB

SRAM

SRAM

Work

ACQ

LOGIC B

Memory

Memory

*

From AD Board

Assembly

4

PRINCIPLE OF THE OPERATION

Logic Board Assembly (Option)Rear Board Assembly

CPU Board Assembly

EXT CLOCK IN

EXT TRIG IN

TRIG GATE IN

TRIG OUT

PROBE POWER

From AD Board

x4

*

Assembly

AMI

Work Memory

BUS Board

Assembly

ACQ Memory

ACQ Memory

ACQ Memory

Board Assembly

CH1/CH2

AMI

CH3/CH4

Work Memory

*

To AD Board

Assembly

Signal

Control

Figure 4.2 Block Diagram (Digital Section) of the DL7100

SM 701410-01E

4 - 7

CH1/CH2

SRAM

FBB

SRAM

SRAM

FBB

SRAM

CH3/CH4

SRAM

FBB

SRAM

SRAM

FBB

SRAM

Signal

Control

Board Assembly

Ring Buffer Memory

OPT TRIG Board

CTL

Assembly (/F7)

AD Board Assembly

Rate Reducer

A/D Converter

one chip Amplifier Multiplexer

RBC

RBC

RBC

RBC

Time Base

*

Assembly

To Logic Board

Trigger Level

Offset

AFC

TV Trigger

Filter

(20MHz

100MHz)

DC/AC/

HFrej

Gain1/1 1/10

1/100 1/200

PWD

Line Trigger

FTL

Comparator

Power Board Assembly

TVC

Assembly

To Rear Board

*

*

*

Assembly

Assembly

From Logic Board

From Bus Board

Assembly

Assembly

To CPU Board

To AD Board

To Ring Buffer

*

*

*

DC

DC

Power

Unit

AC

Memory Board Assembly

DC

DC

4 - 8

Analog Board Assembly

Coupling

(GND/MES) ATT

Coupling

(1MΩ/50Ω)

(AC/DC)

Coupling

CH1

CH2

CH3

CH4

Figure 4.3 Block Diagram (Analog Section) of the DL7200

AC/DC

GND/MES

1MΩ/50Ω

AC

Line T rigger Boar d Assembl y

SM 701410-01E

(Option)

Printer

Key Board

Assembly

LCD

VGA Video OUT

GCP

CIO

Graphic

Memory

Memory

Character

FD Drive

FD Controller

CENTRONICS

GPIB

GPIB IF

Backup RAM

SCSI

SCSI IF

CENTRONICS IF

CPU

RS-232

RS-232 IF

DRAM

PC Card (/C9, /C10)

Flash ROM

Ethernet (/C10)

PC CARD IF Board

PC CARD IF

ETHERNET IF

Assembly (/C9)

or

Trigger Logic

*

To AD Board Assembly

Ethernet Board

Assembly (/C10)

LOGIC A

*

From AD Board

RBC

AMI

Assembly

FBB

SRAM

SRAM

Work

ACQ

LOGIC B

Memory

Memory

*

From AD Board

Assembly

RBC

FBB

SRAM

4

PRINCIPLE OF THE OPERATION

SRAM

Logic Board Assembly (Option)Rear Board Assembly

CPU Board Assembly

Work Memory

BUS Board

SM 701410-01E

EXT CLOCK IN

EXT TRIG IN

TRIG GATE IN

TRIG OUT

PROBE POWER

From AD Board

x4

*

Assembly

AMI

ACQ Memory

ACQ Memory

ACQ Memory

Board Assembly

Assembly

CH1/CH2

AMI

CH3/CH4

Work Memory

*

To AD Board

Assembly

Signal

Control

Figure 4.4 Block Diagram (Digital Section) of the DL7200

4 - 9

Chapter 5 TROUBLESHOOTING

Contents of This Chapter

5.1 Introduction

5.2 Flowchart

5.3 Power Supply Secondary Voltage

5.4 Self Test

5.4.1 Key Board Test

5.4.2 Memory Test

5.4.3 FDD Test

5.4.4 SCSI Test

5.4.5 Printer Test

5.4.6 Accuracy Test

5.4.7 PC Card Test (Option)

5.1 Introduction

5

TROUBLESHOOTING

5.1 Introduction

WARNING

NOTE If an error message is displayed, the error may have been caused by incorrectly operat-

5.2 Flowchart

This chapter describes possible solutions for rectifying errors.
In such cases, assembly removal may be required.
Please keep the following precautions in mind.

Assembly replacement is to be performed only by qualified service technicians
who have experience working with the hazards involved (such as fire and

electrical shock).

ing the unit. Refer to the user’s manual, and perform the correct operation.

Figure 5.1, “Troubleshooting Flowchart” shows an analytical method for handling
malfunctions.

SM 701410-01E

5 - 1

(1)

START

Power ON

LCD OK?

Check the

fuse

Fuse OK?

Check secondary

voltage of power supply

Voltage O K?

INITIALIZE

†

LCD OK?

*

Check secondary

voltage of power

supply unconnected

to power board

Voltage OK?

(1)’

Check each

board for shorts

Check display.

Connect RGB VIDEO

OUT to monitor

Replace

FUSE

*

Replace Power

Supply Unit or Line

Trig Board Ass’y

‡

No error

messages?

Execute self-test

Self-test

successful?

Execute performance

test.

Performance

test successful?

END

Maintenance Service is Required
Contact your nearest YOKOGAWA representative as listed on the back cover of this manual.

5 - 2

(2)’

Check error

contents.

(3)’

Check self-test

results

(4)’

Check

performance

test results.

Monitor

Replace CPU

display OK?

Check LCD

backlight

Backlight

Replace Lamp

lights up?

Replace LCD

* See section 5.3 for detailed instructions.

†

To initialize the settings, reboot the

DL7100/DL7200 while pressing the RESET
key.

‡

The monitor to be connected must be VGA

Figure 5.1 Troubleshooting Flowchart

Board Ass’y

Unit or

Inverter Unit

Ass’y

SM 701410-01E

(1)’

5.2 Flowchart

A short may occur in an assembly other than the power supply unit.
To check in which voltage line a short has occurred, investigate each assembly to which
voltage is supplied, using a circuit tester.
Table 5.1, “Correspondence of Assembly to Voltage” shows the relationship between
assemblies and voltages supplied to them.

Table 5.1 Correspondence of Assembly to Voltage

Voltage Series Assembly No. Assembly

B9969MB AD Board Assembly (Model: 701410, 701420)
B9986MB AD Board Assembly (Model: 701430, 701440)
B9969MC CPU Board Assembly
B9969MD RB MEM2M Board Assembly (Model: 701410)
B9969ME RB MEM8M Board Assembly (Model: 701420)
B9986MD RB MEM4M Board Assembly (Model: 701430)

+3.3V B9969MF ACQ MEM Board Assembly (Model: 701410, 701420)

+5.0V B9969MK KEY Board Assembly

-5.2V B9969MH LOGIC2M Board Assembly (Option: /N1)

+12V B9969MP POWER Board Assembly

-12V B9969MH LOGIC2M Board Assembly (Option: /N1)

+24V B9969EA PRINTER Assembly (Option: /B5)

* The assembly number differs depending on the date of manufacture as follows:

During or before June, 2001: B9969MA
July, 2001 — December, 2001: B9989MA
After December, 2001: B9989ML

B9986ME RB MEM16M Board Assembly (Model: 701440)

B9986MF ACQ MEM Board Assembly (Model: 701430, 701440)
B9969MH LOGIC2M Board Assembly (Option: /N1)
B9969MJ LOGIC8M Board Assembly (Option: /N2)
B9986MH LOGIC4M Board Assembly (Option: /N3)
B9986MJ LOGIC16M Board Assembly (Option: /N4)
B9969MN PC Card I/F Board Assembly (Option: /C9)
B9986MG OPT TRIG Board Assembly (Option: /F7)
B9969MP POWER Board Assembly
B9969MQ LCD Board Assembly
B9969MT PC Card I/F + Ethernet Board Assembly (Option: /C10)
A1057VA LCD Unit

B9989ML
B9969MB AD Board Assembly (Model: 701410, 701420)
B9986MB AD Board Assembly (Model: 701430, 701440)
B9969MC CPU Board Assembly
B9969MH LOGIC2M Board Assembly (Option: /N1)
B9969MJ LOGIC8M Board Assembly (Option: /N2)
B9986MH LOGIC4M Board Assembly (Option: /N3)
B9986MJ LOGIC16M Board Assembly (Option: /N4)

B9969ML LINE TRG Board Assembly
B9969MN PC Card I/F Board Assembly (Option: /C9)
B9986MG OPT TRIG Board Assembly (Option: /F7)
B9969MP POWER Board Assembly
B9969MR REAR Board Assembly
B9969MT PC Card I/F + Ethernet Board Assembly (Option: /C10)
B9969EA PRINTER Assembly (Option: /B5)
A1092UN FDD Unit

B9989ML
B9969MB AD Board Assembly (Model: 701410, 701420)
B9986MB AD Board Assembly (Model: 701430, 701440)
B9969MC CPU Board Assembly

B9969MJ LOGIC8M Board Assembly (Option: /N2)
B9986MH LOGIC4M Board Assembly (Option: /N3)
B9986MJ LOGIC16M Board Assembly (Option: /N4)
B9969MP POWER Board Assembly
B9969MR REAR Board Assembly

B9969MB AD Board Assembly (Model: 701410, 701420)
B9986MB AD Board Assembly (Model: 701430, 701440)
B9969MC CPU Board Assembly

B9969MR REAR Board Assembly
A1476UP INVERTER Unit

B9969MB AD Board Assembly (Model: 701410, 701420)
B9986MB AD Board Assembly (Model: 701430, 701440)

B9969MJ LOGIC8M Board Assembly (Option: /N2)
B9986MH LOGIC4M Board Assembly (Option: /N3)
B9986MJ LOGIC16M Board Assembly (Option: /N4)
B9969MR REAR Board Assembly

B9969MC CPU Board Assembly

B9969SA FAN Assembly

*

*

ANALOG Board Assembly

ANALOG Board Assembly

5

TROUBLESHOOTING

SM 701410-01E

5 - 3

(2)

When trouble occurs, refer to the instruction manual to determine whether the trouble
was caused by erroneous operation or by a hardware defect. Table 5.2, “Correspon­dence of Messages to Defective Assemblies,” shows which a trouble may be due to a
hardware failure.

Table 5.2 Correspondence of Massages to Defective Assemblies

Code Message Assembly No. Assembly

713 Calibration failure. ••• B9989ML

B9969MB AD Board Assembly (Model: 701410, 701420)
B9986MB AD Board Assembly (Model: 701430, 701440)
B9969MC CPU Board Assembly
B9969MD RB MEM2M Board Assembly (Model: 701410)
B9969ME RB MEM8M Board Assembly (Model: 701420)
B9986MD RB MEM4M Board Assembly (Model: 701430)
B9986ME RB MEM16M Board Assembly (Model: 701440)
B9969MF ACQ MEM Board Assembly

B9986MF ACQ MEM Board Assembly

B9969MM BUS Board Assembly
901 Failed to backup setup data. ••• B9969MC CPU Board Assembly
906 Fan stopped ••• B9969SA FAN Assembly

907 Backup battery is flat. B9969MC CPU Board Assembly
* The assembly number differs depending on the date of manufacture as follows:

During or before June, 2001: B9969MA
July, 2001 — December, 2001: B9989MA
After December, 2001: B9989ML

*

ANALOG Board Assembly

(Model: 701410, 701420)

(Model: 701430, 701440)

(3)

When trouble occurs, check the test item displaying FAIL and select the relevant
defective item from table 5.3, “Correspondence of Test Items to Defective Assemblies.”
If necessary, replace the relevant assembly.

Table 5.3 Correspondence of Test Item to Defective Assemblies

Test item Assembly No. Assembly

Key Board B9969MC CPU Board Assembly

Memory B9969MC CPU Board Assembly
FDD B9969MC CPU Board Assembly

SCSI B9969MC CPU Board Assembly
Printer B9969MC CPU Board Assembly

Accuracy B9989ML

PC Card B9969MC CPU Board Assembly

* The assembly number differs depending on the date of manufacture as follows:

During or before June, 2001: B9969MA
July, 2001 — December, 2001: B9989MA
After December, 2001: B9989ML

B9969MK KEY Board Assembly

A1092UN FDD Unit

B9969EA PRINTER Assembly (Option: /B5)

B9969MB AD Board Assembly (Model: 701410, 701420)
B9986MB AD Board Assembly (Model: 701430, 701440)
B9969MC CPU Board Assembly
B9969MD RB MEM2M Board Assembly (Model: 701410)
B9969ME RB MEM8M Board Assembly (Model: 701420)
B9986MD RB MEM4M Board Assembly (Model: 701430)
B9986ME RB MEM16M Board Assembly (Model: 701440)
B9969MF ACQ MEM Board Assembly (Model: 701410, 701420)
B9986MF ACQ MEM Board Assembly (Model: 701430, 701440)
B9969MM BUS Board Assembly

B9969MN PC Card I/F Board Assembly (Option: /C9)
B9969MT PC Card I/F + Ethernet Board Assembly (Option: /C10)

*

ANALOG Board Assembly

5 - 4

SM 701410-01E

(4)

5.2 Flowchart

When trouble occurs, check the non-conforming test and select the relevant defective
assembly from table 5.4, “Correspondence of Test Items to Defective Assemblies.” If

necessary, replace the relevant assembly.

Table 5.4 Correspondence of Test Item to Defective Assemblies

Test item Assembly No. Assembly

2.5 Vertical Axis DC Voltage Accuracy B9989ML
Test B9969MB AD Board Assembly (Model: 701410, 701420)

B9986MB AD Board Assembly (Model: 701430, 701440)

2.6 Frequency Response Test B9989ML
B9969MB AD Board Assembly (Model: 701410, 701420)
B9986MB AD Board Assembly (Model: 701430, 701440)

2.7 Time-base Accuracy Test B9989ML
B9969MB AD Board Assembly (Model: 701410, 701420)
B9986MB AD Board Assembly (Model: 701430, 701440)

2.8 Trigger Sensitivity Test B9989ML
B9969MB AD Board Assembly (Model: 701410, 701420)
B9986MB AD Board Assembly (Model: 701430, 701440)

2.9 Trigger Accutracy Test B9989ML
B9969MB AD Board Assembly (Model: 701410, 701420)
B9986MB AD Board Assembly (Model: 701430, 701440)

2.10 Logic Input Function Test B9969MH LOGIC2M Board Assembly (Option: /N1)
B9969MJ LOGIC8M Board Assembly (Option: /N2)
B9986MH LOGIC4M Board Assembly (Option: /N3)
B9986MJ LOGIC16M Board Assembly (Option: /N4)

* The assembly number differs depending on the date of manufacture as follows:

During or before June, 2001: B9969MA
July, 2001 — December, 2001: B9989MA
After December, 2001: B9989ML

*

*

*

*

*

ANALOG Board Assembly

ANALOG Board Assembly

ANALOG Board Assembly

ANALOG Board Assembly

ANALOG Board Assembly

5

TROUBLESHOOTING

5.3 Power Supply Secondary Voltage

Check power supply secondary voltage if they fit the values listed on figure 5.2, “Power
Supply Secondary Terminals” and T able 5.5, “Power Supply Secondary Terminal’s Voltage.”

1

7 Connector

2

8

3

9

4

10

11

12

131415

16

5

6

Figure 5.2 Power Supply Secondary Terminal

To release the security function while checking voltage without connecting the power
supply secondary terminal to the power board, short pins number 1 and 4 (See figure

5.3, “Release Security Function”) of the connector shown in figure 5.2, “Power Supply

Secondary Terminal.” Check the voltage between terminals and GNDs of individual
modules as the GNDs within each module are isolated from each other.

Table 5.5 Power Supply Secondary Terminal’s Voltage

Module T erminal Voltage Cable color

–5.3 V

+3.4 V*

+24 V

+12.1 V

+5.1 V

–12.1 V

* +3.58 V for Models 701430 and 701440.

123456

1, 2
7, 8
3, 4
9, 10
5
11
6
12
13
15
14
16

GND
–5.3 V
+3.4 V
GND
+12.1 V
GND
+5.1 V
GND
+5.1 V
GND
GND
–12.1 V

Black
Brown
Red
Black
White
Black
Yellow
Black
Orange
Black
Black
Blue

SM 701410-01E

Short

Figure 5.3 Release Security Function

5 - 5

5.4 Self Test

After turning the power ON, first press the MISC key and then the Next 1/2 soft key.
Press the Self Test soft key and then the Test Item soft key to display the Self T est
menu screen (figure 5.4).

Figure 5.4 Self Test Menu

Press the soft key of the desired self-test object.

5 - 6

Figure 5.5 Self Test Item

SM 701410-01E

5.4.1Key Board Test

Check the operations key-switches, rotary knobs and jog-shuttle on the front panel.

1) Press the Test Item soft key in the Self test menu, and select Key Board. Press the
Exec soft key to start the key test.

2) The names of each key you press should be inversely displayed on a white background.
To complete the key test, press all the keys at the front panel one by one. To abort the
key test, press the ESC key twice.

5.4.2 Memory Test

The memory test is performed and its result is displayed. When the test has been
completed normally, “Pass” is displayed on the screen (refer to figure 5.6). When the
test detects a problem, “Failed” is displayed on the screen. Refer to table 5.3 to select
the relevant defective assembly.

5.3 Self Test

5

TROUBLESHOOTING

SM 701410-01E

Figure 5.6 Execution Results of the Memory Test

5 - 7

5.4.3 FDD Test

The FDD test is performed and its result is displayed. Insert a floppy disk into the drive
before executing the test. If the test has been completed normally, “Pass” is displayed
on the screen (refer to figure 5.7). When the test detects a problem, “Failed” is dis­played on the screen. Refer to table 5.3 to select the relevant defective assembly.

5.4.4 SCSI Test

Figure 5.7 Execution Results of the FDD Test

The SCSI test is performed and its result is displayed. When the test has been com­pleted normally, “Pass” is displayed on the screen (refer to figure 5.8). When the test
detects a problem, “Failed” is displayed on the screen. Refer to the table 5.3 to select
the relevant defective assembly.

5 - 8

Figure 5.8 Execution Results of the Accuracy Test

SM 701410-01E

5.4.5 Printer Test

1: Vertically printed lines on alternate dots
2: Checkered pattern every other 1 dot
3: Checkered pattern every other 2 dots
4: Checkered pattern every other 4 dots
5: Checkered pattern every other 8 dots
6: Checkered pattern every other 16 dots
7: Checkered pattern every other 32 dots
8: Checkered pattern every other 64 dots
9: Horizontally printed lines on alternate line

5.3.4 Self Test (PRINTER)

If the DL7100/DL7200 is equipped with the optional printer (/B5), print out the patterns
shown in figure 5.9, “Printer Print Patterns” on the printing paper.

1

5

TROUBLESHOOTING

2
3
4
5

6
7

8

SM 701410-01E

9

Figure 5.9 Printer Print Patterns

5 - 9

5.4.6 Accuracy Test

The accuracy test is performed and its result is displayed. When the test has been
completed normally, “Pass” is displayed on the screen (refer to figure 5.10). When the
test detects a problem, “Failed” is displayed on the screen. Refer to the table 5.3 to
select the relevant defective assembly.

5.4.7 PC Card Test (Option)

The PC card test is performed and its result is displayed. Insert a flash ATA card into
the slot before executing the test. The test has been completed normally, “Pass” is
displayed on the screen (refer to figure 5.11). When the test detects a problem, “Failed”
is displayed on the screen. Refer to table 5.3 to select the relevant defective assembly.

Figure 5.10 Execution Results of the Accuracy Test

5 - 10

Figure 5.11 Execution Results of the PC Card Test

SM 701410-01E

Chapter 6 SCHEMATIC DIAGRAM

6

SCHEMATIC DIAGRAM

SM 701410-01E

*

* The assembly number differs depending on the date of manufacture as follows:

During or before June, 2001: B9969MA
July, 2001 — December, 2001: B9989MA
After December, 2001: B9989ML

*

Figure 6.1 Schematic Diagram of the DL7100

6 - 1

*

*

* The assembly number differs depending on the date of manufacture as follows:

During or before June, 2001: B9969MA
July, 2001 — December, 2001: B9989MA
After December, 2001: B9989ML

Figure 6.2 Schematic Diagram of the DL7200

6 - 2

SM 701410-01E

7.1 Customer Maintenance Parts List

Chapter 7 CUSTOMER MAINTENANCE

PARTS LIST

7.1 Customer Maintenance Parts List

7.2 Standard Accessories

7.1 Customer Maintenance Parts List

7

CUSTOMER MAINTENANCE PARTS LIST

SM 701410-01E

Note:

Parts marked with a symbol are CMPL (Customer maintenance parts list) parts.

7 - 1

17

16

21

20

19

18

1514

13

12

Item

1

2

3
4

5
6
7
8

B9969DA

B9969DB

B9969DK
B9969DD

B9969DC
B9969DE
A9120ZM
A9083ZM

22 23 24

QtyPart No.

Description
Front Bezel Assembly (701410, 701420)

1

Front Bezel Assembly

1B9986DA

(701430 not /F7, 701440 not /F7)
Front Bezel Assembly

1B9986EH

(701430 /F7, 701440 /F7)

Front Bezel (701410, 701420)

1

Front Bezel (701430, 701440)1B9986DB
Front Bezel (701430 /F7, 701440 /F7)1B9986DE
Lens

10

Knob

1

Knob

1

Knob

1

Foot Assembly

4

Foot

1

Spacer1A9110ZM9

Support2A9086ZM10
Screw2Y9512LB11

34

11

10

5

8

7

1

2

6

Item

B9969EQ

13

B9969DV

14

(select)

15

Y9418LB

16

A9137ZM

17

A9136ZM

18

(select)

B9946GZ

19

A9079ZM

20

B9969CX
B9969DX 1 Case Assembly (701410, 701420 not /B5)

21

9

QtyPart No.

Description
Cover2A9065ZM12

Grip Assembly

1

Rear Foot

4

B.H. Screw, M4x18

4

Cover (/B5)

1

Case (/B5)

1

Screw (/B5)

2

Knob (/B5)

2

Case Assembly (701410, 701420 /B5)

1

Case Assembly (701430, 701440 /B5)1B9986CX
Case Assembly (701430, 701440 not /B5)1B9986DX
Front Cover (see page 7-4)1B9969BY
Knob1B9969DG22
Knob1B9969DH23

Knob2B9969DJ24

Note :

(select)

CMPL parts

7 - 2

SM 701410-01E

7.1 Customer Maintenance Parts List

19

27

26

25 24 23 22 21 20

28

34

15

31

181716

33

14
13

12

30

10

32

11

7

CUSTOMER MAINTENANCE PARTS LIST

29

1

2

3

Item

B9969DU

1

A1057VA

2
3

B9969MQ

4

A1214WF

5

B9969MK

6

B9969TD

7

B9969EC
B9986EC 1 Analog Board Assembly (701430, 701440)

8

B9969MP

B9986MD
B9986ME11
B9969MJ 1 Logic 8M Board Assembly (/N2)

B9986MH 1 Logic 4M Board Assembly (/N3)
B9986MJ 1 Logic 16M Board Assembly (/N4)

14 B9969MC 1 CPU Board Assembly

B9969MF15 ACQ MEM Board Assembly (701410, 701420)1
B9986MF 1 ACQ MEM Board Assembly (701430, 701440)

16

B9969DR

17

QtyPart No.

Description
Knob

1

LCD

1

LCD Board Assembly

1

Multi conductor

1

Key Board Assembly

1

Cable

1

Analog Board Assembly (701410, 701420)

1

Power Board Assembly

1

Bus Board Assembly1B9969MM9
Cable1B9969TD10

Tube1A9425XK11
RB MEM 2M Board Assembly (701410)1B9969MD12
RB MEM 8M Board Assembly (701420)1B9969ME
RB MEM 4M Board Assembly (701430)

RB MEM 16M Board Assembly (701440)
Logic 2M Board Assembly (/N1)1B9969MH13

PC Card Bezel (/C9) (/C10)1B9969DQ
PC Card Cover (/C9) (/C10)1

4

5

(select)

6

Part No.

Item

18

B9969DS

(select)

19

B9969MR

21

B9918TD

22

A1092UN

23

B9969ED
B9986ED 1 Power Supply Assembly (701430, 701440)

24

B9969BX

25

(select)

31 B9986DC 1 Cover (not /C10, /C9)
32 B9986DD 1 Cover (not /C10)

33 A9066ZB 2 Cap (not /N1, /N2, /N3, /N4)
34 B9969EB PC Card Assembly (/C9)

B9969FC PC Ether Assembly (/C10)

35 B9986MG OPT TRIG Board Assembly

Qty

Description
Spring (/C9) (/C10)

1

Rear Board Assembly

1

Printer (/B5)1A1207UD20
Cable (/N1, /N2, /N3, /N4)

1

Memory System

1

Power Supply Assembly (701410, 701420)

1

Rivet

4

Fan Assembly1B9969SA
Line Trig Board Assembly

1B9969ML26

Retainer E1Y9250ET27
Power Supply1A1476UP28
Spacer2B9946DG29
Multi conductor1A1214WF30

1
1
1

(701430 /F7, 701440 /F7)

9

8

7

35

Note :

CMPL parts

(select)

(select)

SM 701410-01E

7 - 3

7.2 Standard Accessories

1

7

2

8

3

10

4

9

11

5

7 - 4

Part No.

Item

A1006WD

1
2

A1253JZ 1 3P-2P Adapter *

4

A1054WD

5

A1024WD

6

B9850NX

7

B9969ET
IM701410-01E

8

B9969BY

9
10 A9088ZM 2 Stopper
11 A1352EF 2 Fuse
12 700988 2 Probe

700988 2 Probe (/E2)

13 700939 2 FET Probe (/E3)

Qty

Description

1

Power Supply Code (UL/CSA standard) *

1A1009WD3

Power Supply Code (VDE standard)

1

Power Supply Code (BS standard)

1

Power Supply Code (AS standard)

11Roll Chart (/B5)

Soft Case
DL7100/DL7200 Digital Oscilloscope User’s Manual

1

DL7100/DL7200 Digital Oscilloscope Operation Guide1IM701410-02E
DL7100/DL7200 Digital Oscilloscope Communication Interface1IM701410-01E

DL7200 CAN Bus Signal Analysis Function

1IM701410-01E

Front Cover

1

12

13

6

, †

‡

§
||

(select)

#

Note:

7014 - -M

*
†

7014 - -D

‡

7014 - -F

§

7014 - -Q
|| 7014 - -R
# 701430, 701440

CMPL parts

SM 701410-01E