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SM 700820-01E

IMPORTANT NOTICE TO THE USER

This manual contains information for servicing the YOKOGAWA Digital Oscilloscope

DL2700 series. Confirm by serial number that this Service Manual covers the instru-

ment 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 in accor-

dance with and to the extent permitted by 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.

YOKOGAWA ELECTRIC CORPORATION (YOKOGAWA) does not in principle

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, or 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.

by any means without the express written prior permission of YOKOGAWA. The

contents of this manual are subject to change without notice.

Disk No. SM11

2nd Edition : August 1998 (YK)

1996, Yokogawa Electric Corporation

Содержание DL2700 Series

Страница 1: ...Service Manual Yokogawa Electric Corporation SM 700820 01E SM 700820 01E 2nd Edition Model 7008 DL2700 Series Digital Oscilloscope...

Страница 2: ...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...

Страница 3: ...of the instruments into consideration the replace ment of assemblies offers the user the possibility to use YOKOGAWA instruments more effectively and economically with a minimum in downtime INTRODUCTI...

Страница 4: ...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 i...

Страница 5: ...the beginning of this manual and the warnings cautions contained in the referred chapter prior to carrying out any servicing This manual contains the following chapters 1 GENERAL INFORMATION Describe...

Страница 6: ...ironment 3 1 3 3 Equipment Required 3 2 3 4 Dip Switch Setting of the CPU board 3 2 3 5 Rotary Switch Setting of the Printer board 3 2 3 6 Power Supply Adjustment 3 3 3 7 Flatness Adjustment on the At...

Страница 7: ...al describes servicing information on YOKOGAWA Digital Oscilloscope DL2700 series This chapter contains information required for using this manual and information that must be known before starting se...

Страница 8: ...e of the instrument The order of the test is just for convenience and it does not have any significant meaning Please use recom mended equipment or their equivalents 2 2 Test Environment 1 Please oper...

Страница 9: ...ange Yokogawa 700998 Logic Probe 4 8 bit Yokogawa 700985 2 4 Self diagnosis Equipment required None Procedure Follow the procedure described in the Instruction Manual IM 700820 01E Section 14 3 Self d...

Страница 10: ...ss the INITIALIZE key then press the Initialize soft key to initialize the settings 2 Set the DL2700 oscilloscope as shown below VERTICAL for all channels V DIV According to the inspection item below...

Страница 11: ...ner 2 6 Frequency Response Test Specifications In equivalent sampling mode DC to 150 MHz 3 dB point Permissible range Input frequency Permissible range 0 1 MHz 1 dB 10 02 MHz 1 dB 150 02 MHz 1 3 dB Eq...

Страница 12: ...power source of the DL2700 After warm up press the CAL key then press the Calibration soft key to calibrate the instrument Furthermore press the INITIALIZE key then press the Initialize soft key to i...

Страница 13: ...cy Test Specifications 0 01 500 ps Permissible range 50 kHz 10 kHz Equipment required Equipment Qty Mandatory specifications Recommended Standard signal generator 1 Output frequency range HP 8657A 0 1...

Страница 14: ...en by using MEASURE must be 50 kHz 10 kHz 10 kHz tolerance is equal to 0 01 of the sampling clock frequency 100MHz 2 8 Trigger Sensitivity Test Specifications 2 mV div DC to 150 MHz 2 divp p on the sc...

Страница 15: ...the DL2700 as shown below VERTICAL CH1 V DIV 50 mV div COUPLING DC PROBE 1 1 HORIZONTAL TIME DIV 10 ns TRIGGER MODE NORMAL SOURCE CH1 COUPLING DC SLOPE DISPLAY MAINFORMAT SINGLE 3 Input a 150 MHz sign...

Страница 16: ...nection 50 ohm Termination Function Generator Cable DL2700 Procedure 1 Turn on the power source of the DL2700 After warm up press the CAL key then press the Calibration soft key to calibrate the instr...

Страница 17: ...e same manner 2 10 Logic Input Function Test Equipment required Equipment Qty Mandatory specifications Recommended Probe 1 150 MHz frequency range Yokogawa 700998 Logic Probe 4 8 bit Yokogawa 700985 C...

Страница 18: ...bits of the other POD are set to X 12 Connect the 1st bit probe of POD A to the CAL terminal 13 Check the trigger activated correctly If the logic input signal is displayed check the waveform on the...

Страница 19: ...ed Be careful when handling so that hands or fingers are not injured by the pin protrusions Circuit patterns of the printed circuit board are exposed If these patterns touch other metallic materials e...

Страница 20: ...uipment and tools Therefore non designated equipment and tools which satisfy the specifications may be permitted for use The Function Generator setting values described in this service manual are thos...

Страница 21: ...e bind and the plate under the printer 4 Remove all the boards inserted to the mother board No 27 31 to 38 on CMPL 700820 01E Page 3 5 Remove the shielding case of those boards 6 Remove the CN7 and CN...

Страница 22: ...stor VR501 refer to Figure 3 1 and 3 2 Adjustment point location diagram so that the measuring voltage fits within 5 3 0 1V In order to avoid electric shock or fire hazard do not use metallic screwdri...

Страница 23: ...Press the CAL and Calibration option to perform calibration 6 For adjustment of the 1 range set up the DL2700 and Function Generator as follows DL2700 Ch 1 8 Probe 1 1 Volt div 20 mV div Tim div 200 u...

Страница 24: ...00 and Function Generator as follows DL2700 Ch 1 8 Probe 1 1 Volt div 2V div Tim div 20 us div ACQ Record Length 10KW Function Generator Wave Form Square wave Frequency 10 kHz Amplitude 12 Vp p 11 Adj...

Страница 25: ...he main unit cover and the two fixing plates 2 Allow the unit to warm up for 15 minutes or more 3 Connect each instrument as shown in Figure 3 6 Connection method CH 1 to 8 Conversion Adapter DL2700 D...

Страница 26: ...djustment of 7 for all channels Table 3 2 Adjustment point Model Channel Adjustment point 70082_ ch1 RV301 ch2 RV302 70084_ ch1 RV301 ch2 RV302 ch3 RV303 ch4 RV304 70086_ ch1 RV301 on the right AFC bo...

Страница 27: ...3 9 ADJUSTMENTS SM 700820 01E 3 RV301 RV302 RV303 RV304 Figure 3 7 Adjustment point location diagram 3 8 DC Gain Adjustment on the Analog Assembly...

Страница 28: ...ter with 1M input DL2700 Probe Center Board of long slots Connect probe hooktip to TP401 Test Point and probe ground lead to TP701 GND Figure 3 9 Connection method 4 Press the INITIALIZE key and selec...

Страница 29: ...3 11 ADJUSTMENTS SM 700820 01E 3 R423 TP401 Figure 3 10 Adjustment point location diagram 3 9 Start able Oscillator Adjustment on the Trigger Assembly...

Страница 30: ...embly 1 ATT Assembly The ATT Assembly incorporates the three switching circuit blocks the AC DC cou pling GND MEASURE and the attenuator factors 1 1 1 10 and 1 100 These switch ing circuits are compos...

Страница 31: ...supplied for the clock of the A D converter In the 500MSps Interleave mode the 250 MHz is used and the 200 MHz is utilized in the other modes Addition ally the external clock sampling is also possible...

Страница 32: ...nal expansion option 960 CPU 8M Board Assembly without the 1MW computational expansion 960 CPU 16M Board Assembly with the 1MW computational expansion 6 68k CPU Board Assembly The 68k CPU Board Assemb...

Страница 33: ...ray functions used in each assem bly 1 The wide frequency bandwidth amplifier IC Performs the continuous gain control 1 to 20 by the Gilbert cell method The frequency bandwidth is appox 450 MHz 2 Anal...

Страница 34: ...data can be written to the acquisition memories One ADP is in charge of a pair of channels for the interleave function Normally the ADP produces the data at the one eighth speed rate of the A D conver...

Страница 35: ...AC DC Offset Gain Filter 20MHz AC DC HFrej AFC TV Trigger ATT 1chip Amplifire Coupling AC DC Coupling GND MES Comparator GND MES 1 1 1 10 1 100 AC DC Offset Gain Filter 20MHz AC DC HFrej ATT Board As...

Страница 36: ...nter Board Ass y Power Unit Power Unit AC AC A B C D Rear Term Ass y Board Ass y Board 68k CPU Backup RAM Flash RAM Key Controler GPIB Controler SCSI Controler FDD Controler 68k CPU Board Ass y Logic...

Страница 37: ...hapter describes possible solutions for rectifying errors In such cases assembly removal may be required Please keep the following precautions in mind WARNING Replacing assembly is to be performed onl...

Страница 38: ...hart shows an analytical method for handling trouble occurrence YES YES NO NO 2 1 Display Power ON Message displayed START YES NO 4 Execute Performance Test Performance test normal END YES NO 3 Excute...

Страница 39: ...Check secondary side voltage Check power supply voltage FUSE OK VoltageOK END START NO YES Replace power supply unit Voltage OK 1 NO YES Execute INITIALIZE 2 LCD display normal NO YES Check video sig...

Страница 40: ...Board Assembly 68k CPU Board Assembly Video Board Assembly 5V Printer Board Assembly Option Mother Board Assembly KEY Board Assembly LCD Board Assembly SCSI Board Assembly LCD Assembly Printer Assemb...

Страница 41: ...ailure Failed CH ATT Board Assembly AFC Board Assembly ACQ Board Assembly TRG Board Assembly 900 No response from sub system Time out 960 CPU BOARD Assembly 901 Backup failure Battery 906 Fan stopped...

Страница 42: ...y Response Test ATT Board Assembly ACQ Board Assembly 2 7 Time base Accuracy Test TRG Board Assembly 2 8 Trigger Sensitivity Test ATT Board Assembly AFC Board Assembly TRG Board Assembly 2 9 Trigger A...

Страница 43: ...3 1 Self Test Memory_System The Memory System 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 5 When the test...

Страница 44: ...d test depends on the model as follows 70082_ ACQ Board 1 70084_ ACQ Board 1 2 70086_ ACQ Board 1 2 3 70088_ ACQ Board 1 2 3 4 Figure 5 6 Execution results of the Memory ACQ RAM test 5 3 3 Self Test K...

Страница 45: ...patterns on the printing paper 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 Checke...

Страница 46: ...6 SCHEMATIC DIAGRAM SM 700820 01E 6 1 Chapter 6 SCHEMATIC DIAGRAM...

Страница 47: ...SM 700820 01E 6 2...

Страница 48: ...6 3 SM 700820 01E...

Страница 49: ...6 4 SM 700820 01E...

Страница 50: ...6 5 SM 700820 01E...

Страница 51: ...6 6 SM 700820 01E...

Страница 52: ...INTENANCE PARTS LIST SM 700820 01E 7 1 Chapter 7 CUSTOMER MAINTENANCE PARTS LIST 7 1 Customer Maintenance Parts List 7 2 Standard Accessories 7 1 Customer Maintenance Parts List 7 1 Customer Maintenan...

Страница 53: ...83ZM 8 Foot Assembly 4 A9102ZM 7 Top Cover B5 1 B9928CX Top Cover 1 B9929CX 10 Support 2 A9086ZM 4 Foot 4 A9084ZM 11 B H Screw M3x8 2 Y9308LB 18 Knob B5 2 A9079ZM 17 Bezel B5 1 A9074ZM 16 Lever B5 1 A...

Страница 54: ...7 CUSTOMER MAINTENANCE PARTS LIST SM 700820 01E 7 3 19 17 18 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 38 37 36 35 34 33 32 31 27 26 25 24 23 30 29 28 22 21 20 27 16 7 1 Customer Maintenance Parts List...

Страница 55: ...Cover B H Screw M3x16 Grip Assembly Battery Assembly Battery Holder Mother Board Assembly Logic Assembly F2 AFC Board Assembly 70086 70088 AFC Board Assembly 70082 70084 ATT Assembly 70088 ATT Assembl...

Страница 56: ...B9929DG B9929BQ A1051VA A1592JT A9090ZM A1490JT B9929SG B9919GE B9919GA B9919GB B9941GF A9080ZG A9079ZG A9076ZG A9081ZM A9103ZG 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 3 4 5 6 7 8 9 1...

Страница 57: ...2 A1006WD 2 A1253JZ 7 700996 8 9 B9850NX 10 A1353EF 14 366972 13 705900 12 366950 11 6 A9088ZM 5 A1024WD 4 A1054WD 3 A1009WD Power Supply Code UL CSA standard 1 2 Probe Stopper Power Supply Code SAA...

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