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DP7700-2107 Troubleshooting Guide
Last Revised: September 29, 2007
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SHENZHEN MINDRAY BIO-MEDICAL ELECTRONICS CO., LTD.
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REVISION CONTROL
Document Title: DP7700-2107 Troubleshooting Guide
Author: Mindray Service Department
Date By Action Pages
September 3rd,
2007
Rudolf Pan New document All
Review/Approval History
Date By Action Pages
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Table of Contents
Page1. Categories _______________________________________________________________5
2. Boot up__________________________________________________________________6
2.1 Symptoms_____________________________________________________________________ 6
2.2 Check route ___________________________________________________________________ 6
2.3 Reason of defect________________________________________________________________ 6
2.4 Defective parts statistics _________________________________________________________ 6
3. Black screen _____________________________________________________________7
3.1 Symptoms_____________________________________________________________________ 7
3.2 Check route ___________________________________________________________________ 7
3.3 Reason of defect________________________________________________________________ 7
3.4 Defective parts statistics _________________________________________________________ 7
4. Keyboard and trackball related_______________________________________________8
4.1 Symptoms_____________________________________________________________________ 8
4.2 Solution (keyboard)__________________________________________________________ 8
4.3 Reason of defect________________________________________________________________ 8
4.4 Defective parts statistics _________________________________________________________ 95. Lock up __________________________________________________________________10
5.1 Symptoms____________________________________________________________________ 10
5.2 Solution _____________________________________________________________________ 10
5.3 Reason of defect_______________________________________________________________ 10
6. Image related _____________________________________________________________11
6.1 Symptoms____________________________________________________________________ 11
6.2 Check route __________________________________________________________________ 11
6.3 Reason of defect_______________________________________________________________ 12
6.4 Defective parts statistics ________________________________________________________ 13
7. Intermittent problems _______________________________________________________14
7.1 Symptoms____________________________________________________________________ 14
7.2 Solution _____________________________________________________________________ 14
8. Screen flicker _____________________________________________________________15
8.1 Symptoms____________________________________________________________________ 15
8.2 Solution _____________________________________________________________________ 15
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8.3 Reason of defect_______________________________________________________________ 15
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1. Categories
This document offers several methods to isolate defects or problems according to the symptoms observed.
We can classify the symptoms to several categories. The categories are very helpful for you to find
problems in different systems and its a general tool, not only used in the system described in thisdocument.
For different categories, we have different methods to solve problems. Most of the methods are
commonly used in all Mindray ultrasound systems but there might be slight differences when you use
them on different systems.
No. Name Description
Category 1 Boot up related Fail to boot, or halted in certain
point of the boot progress.Category 2 Black screen Keyboard is functioning but there
is nothing displayed on the
monitor.
Category 3 Keyboard and trackball related Certain keys dont work.
Category 4 Lock up System halted during certain
operation.
Category 5 Image related The system is running well but
the image is abnormal.
Category 6 Intermittent problems The problem cannot be
reproduced according to the same
operation or handling. However,
the problem happens in a random
rate during using.
Category 7 Screen flicker Screen glinting or trembling
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2. Boot up
2.1 Symptoms
Stops at Mindray LOGO, and nothing else happens
2.2 Check route
2.3 Reason of defect
Software initialization fails
2.4 Defective parts statistics
54.50%
45.50%power supply
board
main board
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3. Black screen
3.1 Symptoms
When power on the machine, screen is black.
3.2 Check route
3.3 Reason of defect
Main board failure, power supply board failure, monitors failure
3.4 Defective parts statistics
55.00%
45.00%power supply
board
monitor
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4. Keyboard and trackball related
4.1 Symptoms
Some keys are not functioning, trackball out of control, and nothing else abnormal
4.2Solution (keyboard)
Note:
The flow chart above only tell how to deal with the problem that keyboard cant function,
When meeting trackball out of control and nothing else abnormal, please check the connection between
Trackball and keyboard or connection between trackball (keyboard) and DSC board.
Change the keyboard PCB, or trackball
4.3 Reason of defectKeyboard failure, trackball failure.
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4.4 Defective parts statistics
22.00%
48.00%
28%2%
clean or adjustsilicon rubber
pad position
silicon rubber
pad
keyboard PCB
power supply
board
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5. Lock up
5.1 Symptoms
When you press some keys the system locks up, and nothing else abnormal. Or can not wake up from
system dormant
5.2 Solution
Change the main board
5.3 Reason of defect
Main board failure
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6. Image related
6.1 Symptoms
Machine is working normally, but image is abnormal
6.2 Check route
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Note: Some customers complain that the image quality is not good; generally, these problems can be
solved by adjusting the machine (such as monitor brightness, image parameters .)
Sometimes the defect of monitor itself can also cause the image display not good.
6.3 Reason of defect
Some electronic or magnetic interference, probe failure, channel board failure, and main board failure.
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6.4 Defective parts statistics
22.00% 11.00%
28.00%
22.00%17.00%
machine is not
adjusted well
probe
monitor
main board
power supply
board
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7. Intermittent problems
7.1 Symptoms
Image with some ripples
7.2 Solution
Check the surrounding, including AC power input, is there any machines which will interfere with the
system. Do remember keep a good environment.
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8. Screen flicker
8.1 Symptoms
Screen glinting or trembling
8.2 Solution
Exchange the CRT. Or check the surrounding, including AC power input, is there any machines which
will interfere with the system. Do remember keep a good environment.
8.3 Reason of defect
Some wrong with CRT