SIGLENT SHS800X Series User manual

SHS800X / SHS1000X
Handheld Digital Oscilloscope
Service Manual
EN01A

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Contents
1. Important Safety Information ............................................................................................ 1
1.1. General Safety Summary.....................................................................................................................1
1.2. Safety Terms and Symbols..................................................................................................................3
2. First Steps ........................................................................................................................... 4
2.1. Delivery Checklist ................................................................................................................................4
2.2. Quality Assurance................................................................................................................................4
2.3. Maintenance Agreement......................................................................................................................4
3. Document Conventions ..................................................................................................... 5
4. Prepare for Using................................................................................................................ 6
4.1. Adjust the Supporting Leg....................................................................................................................6
4.2. Battery Installation ...............................................................................................................................6
4.3. Connect the Power Supply ..................................................................................................................7
4.4. Power-on Inspection............................................................................................................................7
4.5. Connect the Probe...............................................................................................................................7
4.6. Function Inspection..............................................................................................................................8
4.7. Probe Compensation...........................................................................................................................9
4.8. Multimeter Meter Pen...........................................................................................................................9
5. Performance Test.............................................................................................................. 10
5.1. To Verify DC Gain Accuracy..............................................................................................................12
5.2. To Verify Offset Accuracy..................................................................................................................14
5.3. To Verify DC Measurement Accuracy................................................................................................16
5.4. To Verify Time Base Accuracy...........................................................................................................17
5.5. To Verify Trigger Level.......................................................................................................................18
5.6. To Verify Trigger Sensitivity...............................................................................................................19
5.7. To Verify Bandwidth...........................................................................................................................20
5.8. To Verify Bandwidth Limit..................................................................................................................21
5.9. To Verify Channel Skew ....................................................................................................................22
5.10. To Verify Input Impedance.................................................................................................................23
5.11. To Verify Meter DCV..........................................................................................................................24
5.12. To Verify Meter ACV..........................................................................................................................25
5.13. To Verify Meter RES..........................................................................................................................26
5.14. To Verify Meter CAP..........................................................................................................................26
5.15. To Verify Meter DCI...........................................................................................................................27
5.16. To Verify Meter ACI ...........................................................................................................................28
6. Disassembly Procedures................................................................................................. 29
6.1. Safety Consideration and Cautions ...................................................................................................29
6.2. Tools Lists..........................................................................................................................................29
6.3. Disassembly Procedures...................................................................................................................30

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6.3.1. To Remove the Battery Cover and Battery ...................................................................................30
6.3.2. To Remove the Rear Cover..........................................................................................................30
6.3.3. To Remove the Power PCBA........................................................................................................31
6.3.4. To Remove the Main PCBA Cover and DMM PCBA ....................................................................31
6.3.5. To Remove the Main PCBA..........................................................................................................32
6.3.6. To Remove Key PCBA and Keyboard ..........................................................................................33
6.3.7. To Remove the Screen.................................................................................................................33
7. Solving General Problems............................................................................................... 34
8. Troubleshooting................................................................................................................ 36
8.1. Safety Consideration and Cautions ...................................................................................................36
8.2. Required Equipment..........................................................................................................................37
8.3. Troubleshooting Flowchart.................................................................................................................37
8.4. To Check the Power Supply Module..................................................................................................38
8.5. To Check the Main Board..................................................................................................................40
8.5.1. Main Board Drawing......................................................................................................................40
8.5.2. Check the Board-Level Power Supplies........................................................................................42
8.5.3. Check the Clock............................................................................................................................48
8.6. To Check the LCD .............................................................................................................................49
8.6.1. To Check the LCD Power Supply .................................................................................................49
8.6.2. To Check the LCD Signal..............................................................................................................49

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1 Important Safety Information
This manual contains information and warnings that must be followed by the user for safe operation
and to keep the product in a safe condition.
1.1 General Safety Summary
Carefully read the following safety precautions to avoid personal injury and prevent damage to the
instrument and any products connected to it. To avoid potential hazards, please use the instrument
as specified.
To Avoid Fire or Personal Injury.
Use Proper Power Adapter.
Only use the adapter provided with the instrument for connecting the instrument to mains power
sources.
Connect the Signal Wire Correctly.
Do not touch the exposed contacts or components.
Look over All Terminals’ Ratings.
To avoid fire or electric shock, please look over all ratings and signed instructions of the instrument.
Before connecting the instrument, please read the manual carefully to gain more information about
the ratings.
Equipment Maintenance and Service.
When the equipment fails, please do not dismantle the machine for maintenance. The internal devices
of the equipment are sensitive to static electricity, and direct contact is easy to cause irreparable
damage to the equipment. It is necessary to return to the factory or the company's designated
maintenance organization for maintenance. Be sure to pull out the power supply when repairing the
equipment. Live line operation is strictly prohibited. The equipment can only be powered on when the
maintenance is completed and the maintenance is confirmed to be successful.
Identification of Normal State of Equipment.
After the equipment is started, there will be no alarm information and error information at the interface
under normal conditions. The curve of the interface will scan from left to right freely. If there is a button
in the scanning process or there is an alarm or error prompt, the device may be in an abnormal state.
You need to view the specific prompt information. You can try to restart the setting. If the fault

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information is still in place, do not use it for testing. Contact the manufacturer or the maintenance
department designated by the manufacturer to carry out maintenance to avoid the wrong test data
caused by the use of the fault or endanger the personal safety.
Not Operate with Suspected Failures.
If you suspect that there is damage to the instrument, please let qualified service personnel check it.
Avoid Circuit or Wire Exposed Components Exposed.
Do not touch exposed contacts or components when the power is on.
Do not operate in wet/damp conditions.
Do not operate in an explosive atmosphere.
Keep the surface of the instrument clean and dry.
Only probe assemblies that meet the requirement of UL61010-031 and CAN/CSA-C22.2
No.61010-031 shall be used.
Only a lithium battery with the same specifications as the original battery should be used to
replace the battery on board.
Not to use the equipment for measurements on voltage exceed the voltage range describe in
the manual.
The responsible body or operator should refer to the instruction manual to preserve the
protection afforded by the equipment. If the equipment is used in a manner not specified by
the manufacturer, the protection provided by the equipment may be impaired.
Any parts of the device and its accessories are not allowed to be changed or replaced, other
than authorized by the manufacturer or agent.

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1.2 Safety Terms and Symbols
When the following symbols or terms appear on the front or rear panel of the instrument or in this
manual, they indicate special care in terms of safety.
This symbol is used where caution is required. Refer to the accompanying
information or documents to protect against personal injury or damage to the
instrument.
This symbol warns of a potential risk of shock hazard.
This symbol is used to denote the measurement ground connection.
This symbol is used to denote a safety ground connection.
This symbol shows that the switch is an On/Standby switch. When it is pressed,
the oscilloscope’s state switches between Operation and Standby. This switch
does not disconnect the device's power supply. To completely power off the
oscilloscope, the battery must be removed after the oscilloscope is in the standby
state.
This symbol is used to represent alternating current, or " AC ".
CAUTION
The " CAUTION " symbol indicates a potential hazard. It calls attention to a
procedure, practice, or condition which may be dangerous if not followed. Do not
proceed until its conditions are fully understood and met.
WARNING
The " WARNING " symbol indicates a potential hazard. It calls attention to a
procedure, practice, or condition which, if not followed, could cause bodily injury
or death. If a WARNING is indicated, do not proceed until the safety conditions
are fully understood and met.

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2 First Steps
2.1 Delivery Checklist
First, verify that all items listed on the packing list have been delivered. If you note any omissions or
damage, please contact your nearest SIGLENT customer service center or distributor as soon as
possible. If you fail to contact us immediately in case of omission or damage, we will not be
responsible for replacement.
2.2 Quality Assurance
The oscilloscope has a 3-year warranty (1-year warranty for probes and accessories) from the date
of shipment, during normal use and operation. SIGLENT can repair or replace any product that is
returned to the authorized service center during the warranty period. We must first examine the
product to make sure that the defect is caused by the process or material, not by abuse, negligence,
accident, abnormal conditions, or operation.
SIGLENT shall not be responsible for any defect, damage, or failure caused by any of the following:
a) Attempted repairs or installations by personnel other than SIGLENT.
b) Connection to incompatible devices / incorrect connection.
c) For any damage or malfunction caused by the use of non-SIGLENT supplies. Furthermore,
SIGLENT shall not be obligated to service a product that has been modified. Spare,
replacement parts, and repairs have a 90-day warranty.
The oscilloscope's firmware has been thoroughly tested and is presumed to be functional.
Nevertheless, it is supplied without warranty of any kind covering detailed performance. Products not
made by SIGLENT are covered solely by the warranty of the original equipment manufacturer.
2.3 Maintenance Agreement
We provide various services based on maintenance agreements. We offer extended warranties as
well as installation, training, enhancement and on-site maintenance, and other services through
specialized supplementary support agreements. For details, please consult your local SIGLENT
customer service center or distributor.

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3 Document Conventions
For convenience, text surrounded by a box border is used to represent the button of the front panel.
For example, Acquire represents the "Acquire" button on the front panel.

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4 Prepare for Using
4.1 Adjust the Supporting Leg
Properly adjust the supporting leg and place the oscilloscope steadily for better operation and
observation of the display screen.
Figure 1 Adjust the Supporting Leg
4.2 Battery Installation
When the oscilloscope leaves the factory, the battery and the host are separated. Please install the
battery as follows:
1. Remove the three screws on the battery cover with a screwdriver, as shown in Figure 2.
2. Remove the battery cover, as shown in Figure 3.
3. Put the battery into the battery slot and close the battery cover, as shown in Figure 4.
4. Lock the screws with the screwdriver, as shown in Figure 2, and then turn on the oscilloscope to
check whether the battery is installed successfully.
Figure 2
Figure 3
Figure 4

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Important tips:
Pay attention to the direction of the battery cover, with the serial number at the bottom.
Anti-reverse connection design is adopted for battery slot. Please put the battery in gently, do
not use force.
If the battery fails to power on after successful installation, it may be that the battery has run out.
Please charge it in time.
When the oscilloscope is idle, the battery needs to be charged every 3 months.
4.3 Connect the Power Supply
The power requirement of the oscilloscope is 100-240 V, 50/60Hz. Please use the power adapter
provided to connect the oscilloscope to the power source.
Figure 5 Connect to Power Supply
4.4 Power-on Inspection
When the oscilloscope is energized, press the power key at the lower-left corner of the front panel to
start the oscilloscope. During the start-up process, the oscilloscope performs a series of self-tests
and you can hear the sound of relay switching. After the self-test is finished, the welcome screen will
be displayed.
4.5 Connect the Probe
1. Connect the BNC terminal of the probe to a channel BNC connector.
2. Connect the probe tip to the circuit point to be tested and connect the ground alligator clip of the
probe to the circuit ground terminal.

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4.6 Function Inspection
1. Press the Default button on the front panel to restore the instrument to its default
configuration.
2. Connect the ground alligator clip of the probe to the “Ground Terminal” under the probe
compensation signal output terminal.
3. Use the probe to connect the input terminal of CH1 of the oscilloscope and the “Compensation
Signal Output Terminal” of the probe.
4. Press the Auto Setup .
5. Observe the waveform on the display. In normal condition, the display should be a square
waveform as shown in the figure below:
Figure 6 Function Inspection
6. Use the same method to test the other channels. If the square waveforms shown do not match
that in the figure above, please perform “Probe Compensation” in the next section.
WARNING
To avoid electric shock during the use ofprobe, please make sure thatthe insulated
wire of the probe is in good condition and do not touch the metallic part of the probe
when the probe is connected to high voltage source.

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4.7 Probe Compensation
When the probes are used for the first time, you should compensate the probes to match the input
channels of the oscilloscope. Non-compensated or poorly compensated probes may cause
measurement inaccuracy or error. The probe compensation procedures are as follows.
1. Set the switch to 10X on the probe.
2. Perform steps 1, 2, 3 and 4 of “Function Inspection” in the previous section.
3. Check the waveforms displayed and compare them with the following:
Under
Compensated
Perfectly
Compensated
Over
Compensated
4. Use a nonmetallic driver to adjust the low-frequency compensation adjustment hole on the probe
until the waveform displayed is as the “Perfectly compensated” in the figure above.
4.8 Multimeter Meter Pen
To avoid obtaining no measurements or unnecessary damage to the SHS800X/SHS1000X, you
should use the right jack when measuring current, voltage and other measurement.

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5 Performance Test
This chapter explains testing the oscilloscope to verify performance specifications. For accurate test
results, please let the test instruments and the oscilloscope warm-up 30 minutes before testing.
Below is the required equipment for the test:
Table 1 Test equipment
Equipment
Description
Test item
Fluke 9500B + 9530 Active Heads
High-Performance
Oscilloscope Calibrator
DCG\Offset\ Clock
accuracy\BW\BWL\trigger
sensitivity\ Input impedance…
Terminal Load 50Ω
Impedance Match
BW\BWL\trigger sensitivity
Fluke5522A + Dual Banana Cable
Multimeter Calibrator
DCV/ACV/RES/CAP/DCI/ACI
The figures below show the interconnections between the test equipment to the oscilloscope under
test:
9500B
CH
SDS2000X-E
CH1 CH2
SHS800X
SHS100X
9530 active head
Figure 7 Connecting test instruments for DCG/Offset/Timebase/Triglevel/Impedance
Note: “CH” in Figure 7 represents one channel of the 9500B with a 9530 active head; It connects to
any channel of the scope according to test.
9500B
CH
SDS2000X-E
CH1 CH2
SHS800X
SHS100X
9530 active head + terminal load 50Ω
Figure 8 Connecting test instruments for Bandwidth/Bandwitdth limit/Trigger Sensitivity

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Note: “CH” in Figure 8 represents one channel of the 9500B with a 9530 active head and a terminal
load 50 Ω; They connect to any channel of the scope according to test.
9500B
CH1
SDS2000X-E
CH1 CH2
SHS800X
SHS1000X
CH2
9530 active head + terminal load 50Ω
9530 active head + terminal load 50Ω
Figure 9 Connecting test instruments for Skew
Note: “CH1” and “CH2” in Figure 9 of the 9500B represents any two channels of the 9500B with a
9530 active head and a terminal load 50Ω; They connect to any two channels of the scope according
to test.
5522A
V.Ω.RTD
SHS800X
SHS1000X
CH END
END
CH
VΩC
Dual Banana cable
Figure 10 Connecting test instruments for meter’s DCV/ACV/RES/CAP
Note: “CH” and “END” in Figure 10 of the 5522A represents voltage/resistance/capacitance output of
the 5522A with a dual banana cable connect to the “VΩC” input of the scope meter mode.
5522A
A
SHS800X
SHS1000X
CH END
END
CH
SCD Option
Dual Banana cable
Figure 11 Connecting test instruments for meter’s DCI/ACI

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Note: “CH” and “END” in Figure 11 of the 5522A represents the current output of 5522A with a dual
banana cable, connect to SCD600mA (10A) option that installed on the input of scope meter according
to test.
Verify Test Results
To verify whether or not a test passes (i.e., whether the readings are within the appropriate limits), it
is necessary to record the readings in the Performance Test located in the Test Record.
Self-Calibration
If the environmental temperature changes by more than 5℃, the Self Calibration operation must be
performed to achieve the specified performance.
5.1 To Verify DC Gain Accuracy
To calculate the DC gain error of a vertical scale, at least five input and reading values are required
to generate a two-dimensional array.
Use the least square method below to fit the DC Gain error:
Gain error = LINEST (Verror1:Verror5, Vsetting1:Vsetting5)
Notes:
“LINEST” is a function in EXCEL to calculate the characteristic value of a fitted line which fitting a
two-dimensional array by using the least square method, and then returns an array describing the
line. The first value of the returned array represents the slope of the fitting line.
“Vsetting” represents the DC voltage output of the 9500B.
“Vmeasure” represents the measurement value on scope.
“Verror” represents the difference between the voltage setting and the measurement value.
Table 2 Instance of Gain Error Calculation
Vsetting (mV)
Vmeasure (mV)
Verror (mV)
Gain error
Point1
-3
-2.99
0.01
0.4%
Point2
-1.5
-1.49
0.01
Point3
0
0.00297
0. 00297
Point4
1.5
1.49
-0.01
Point5
3
2.99
-0.01

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Steps:
1. Set the 9500B output to on.
2. Connect a selected channel of the oscilloscope to the 9500B with an active head as shown in
Figure 7.
3. Set the timebase of the oscilloscope to 5 ms/div, set the “Mem Depth” in the menu of Acquire
to 600k.
4. Set the vertical scale of the selected channel to 100 V/div, set the position to 0 V. Select the
Measure menu of the oscilloscope to display “Mean” measurement of the selected channel.
5. Set DC voltage output level of the 9500B according to Table 3, and record the “Mean” value of
the channel as Vmean.
6. Calculate Verror (Verror= Vmean – Vsetting), and set the next output level as step 5.
7. Calculate gain error with these 5 data points: Vsetting1~Vsetting5, Verror1~Verror5 by using the ‘LINEST’
function. Check if the slope falls within the range shown in Table 3.
8. Set the next vertical scale of the selected channel to the other settings in Table 3, and repeat
steps 4 to 7.
9. After measuring all vertical scales of the selected channel in turn, turn the 9500B output off.
10. Connect the other channel of the oscilloscope to the 9500B with the active head. Check the other
channel in the same way as step 3 to step 9.
Table 3 DC Gain Accuracy Setting
Vertical Scale
DC voltage output levels
DC Gain Accuracy error
100 V/div
200V, 100 V, 0 V, -100 V, -200 V
±2%
50 V/div
150 V, 75 V, 0 V, -75 V, -100 V
±2%
20 V/div
60 V, 30 V, 0 V, -30 V, -60 V
±2%
10 V/div
30V, 150 V, 0 V, -15 V, -30 V
±2%
5 V/div
15 V, 7.5 V, 0 V, -7.5 V, -15 V
±2%
2 V/div
6 V, 3 V, 0 V, -3 V, -6 V
±2%
1 V/div
3 V, 1.5 V, 0 V, -1.5 V, -3 V
±2%
500 mV/div
1.5 V, 0.75 V, 0 V, -0.75 V, -1.5 V
±2%
200 mV/div
600 mV, 300 mV, 0 V, -300 mV, -600 mV
±2%
100 mV/div
300 mV, 150 mV, 0 V, -150 mV, -300 mV
±2%
50 mV/div
150 mV, 75 mV, 0 V, -75 mV, -150 mV
±2%

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Vertical Scale
DC voltage output levels
DC Gain Accuracy error
20 mV/div
60 mV, 30 mV, 0 V, -30 mV, -60 mV
±2%
10 mV/div
30 mV, 15 mV, 0 V, -15 mV, -30 mV
±2%
5 mV/div
15 mV, 7.5 mV, 0 V, -7.5 mV, -15 mV
±3%
5.2 To Verify Offset Accuracy
Two components must be verified for the offset accuracy. First part is the offset gain error relative to
the setting of offset value. Second part is the error only relative with the setting of the vertical scale.
Table 4 Components of Offset Accuracy
Gain Component
Full scale Component
Offset accuracy
1.5%*offset
1.5%*8* vertical scale +5mV
For the offset is 0 V, the vertical scale is 100 mV/div.
Use the method below to calculate the offset accuracy:
Offset accuracy = 1.5%*0 V + 1.5%*8*100mV + 5mV = 17 mV
To calculate the offset gain error of a vertical scale, at least five input and reading values are required
to generate a two-dimensional array.
Use the least square method below to fit the Offset Gain error:
Offset Gain error = LINEST (Offseterror1:Offseterror5, Offsetsetting1:Offsetsetting5)
Notes:
“LINEST” is a function in EXCEL to calculate the characteristic value of a fitted line which fitting a
two-dimensional array by using the least square method, and then returns an array describing the
line. The first value of the returned array represents the slope of the fitting line.
“Vsetting” represents DC voltage output of the 9500B.
“Offsetsetting” represents the offset value setting on scope.
“Vmean” represents the measurement value on scope.
“Offseterror” represents the difference between Vmean and Vsetting.

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Table 5 Instance of Offset Gain Error Calculation
Vsetting (V)
Offsetsetting (V)
Vmean (V)
Offseterror (V)
Offset Gain error
Point1
10
-10
10.1
-0.1
-1%
Point2
5
-5
5.05
-0.05
Point3
0
0
0
0
Point4
-5
5
-5.05
0.05
Point5
-10
10
-10.1
0.1
Steps:
1. Set the 9500B output to on.
2. Connect a selected channel of the oscilloscope to the 9500B with an active head as shown in
Figure 7.
3. Set the timebase of the oscilloscope to 5 ms/div, set the “Mem Depth” in the menu of Acquire
to 600k.
4. Set the vertical scale of the channel to 50 V/div. Select the Measure menu of the oscilloscope
to display “Mean” measurement of the selected channel.
5. According to Table 6, set offset of the channel to Offsetsetting, and set the 9500B output level to
Vsetting = - Offsetsetting, then record the “Mean” value of the oscilloscope as Vmean.
6. Calculate Offseterror (Offseterror= Vsetting - Vmean), and set the next Offsetsetting as step 5.
7. Calculate offset slope with these 5 data points: Vsetting1~Vsetting5, Offseterror1~Offseterror5 by using
the ‘LINEST’ function. Check if the slope falls within the range of slope error shown in Table 6.
8. Set offset of the channel to 0 V, and turn the 9500B output off, then record the “Mean” value of
the oscilloscope as Vzero. Check if the Vzero falls within the range of zero input. Turn the 9500B
output on for next.
9. Set the vertical scale of the channel to the other settings in Table 6, and repeat the steps 4 to
steps 8.
10. Turn the 9500B output off.
11. Connect another channel of the oscilloscope to the 9500B with the active head. Check the other
channel in the same way as step 3 to step 10.

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Table 6 Offset Accuracy
Vertical Scale
Offsetsetting
Slope error
Zero input (V)
50 V/div
-210 V, 105 V, 0 V, 105 V, 210 V
±1.5%
±6.005
20 V/div
-210 V, 105 V, 0 V, 105 V, 210 V
±1.5%
±2.405
10 V/div
-210 V, 105 V, 0 V, 105 V, 210 V
±1.5%
±1.205
5 V/div
-80 V, -40 V, 0 V, 40 V, 80 V
±1.5%
±0.605
2 V/div
-80 V, -40 V, 0 V, 40 V, 80 V
±1.5%
±0.245
1 V/div
-80 V, -40 V, 0 V, 40 V, 80 V
±1.5%
±0.125
500 mV/div
-80 V, -40 V, 0 V, 40 V, 80 V
±1.5%
±0.065
200 mV/div
-5 V, -2.5 V, 0 V, 2.5 V, 5 V
±1.5%
±0.029
100 mV/div
-5 V, -2.5 V, 0 V, 2.5 V, 5 V
±1.5%
±0.017
50 mV/div
-5 V, -2.5 V, 0 V, 2.5 V, 5 V
±1.5%
±0.011
20 mV/div
-5 V, -2.5 V, 0 V, 2.5 V, 5 V
±1.5%
±0.0074
10 mV/div
-5 V, -2.5 V, 0 V, 2.5 V, 5 V
±1.5%
±0.0062
5 mV/div
-5 V, -2.5 V, 0 V, 2.5 V, 5 V
±1.5%
±0.0056
5.3 To Verify DC Measurement Accuracy
Some products did not list the DC measurement accuracy in the datasheet, but it can be calculated
by combine the DC gain Accuracy and Offset Accuracy. Verify this specification is not necessary if
the DC gain accuracy and Offset accuracy had been verified.
Table 7 DC Measurement Accuracy
DC Measurement Accuracy
±(DC gain accuracy x |Vsetting + Offset setting|+Offset accuracy)
Use the method below to calculate the High/Low limiting for the DC measurement results:
High limit = Vsetting + (DC gain accuracy x |Vsetting + Offsetsetting| + Offset accuracy)
Low Limit = Vsetting - (DC gain accuracy x |Vsetting + Offsetsetting| + Offset accuracy)