Mindray DC-8 EXP Service Manual

Troubleshooting of Regular Malfunctions 13-3
13.2.3 Troubleshooting When System cannot be Started
No.
Failure Description
Cause Analysis
Measure
1
Backlight status is normal
when power on the control
panel but the LCD is blank
screen, displaying “NO
Signal”
The system can be powered on
normally, and then enters into
BIOS self-test stage, but no BIOS
display screen, which indicates the
failure of the CPU module.
Replace CPU module.
2
BIOS start-up graphics is
normally displayed, but it
cannot be kept on
CPU Module malfunction
Replace the CPU
module.
3
System warns
“OPERATING SYSTEM
NOT FOUND”
If OS loading failed, HDD or the
root directory of OS is damaged.
First restore OS or else
replace the HDD.
4
LCD is blank screen after
entering BIOS start-up
graphics
If OS can’t keep on loading, the
directory of HDD may be damaged
First restore, or else
replace the HDD.
5
Doppler start-up graphics is
normally displayed, but it
cannot be kept on
If Doppler can’t keep on loading,
the directory of HDD or HDD may
be damaged
First restore, or else
replace the HDD.
13.3 Troubleshooting for Image Displaying
13.3.1 Module or Board Related
No.
Descriptions
Remarks
1
Front-end power main board
System power supply
2
CW board PCBA
CW mode
3
Receiving board PCBA
Receiving physical channel 128.
4
Transmission board PCBA
Transmission physical channel 128.
5
Signal processing board
Signal processing
6
Probe board assembly
13.3.2 Key Points Supporting Troubleshooting
No.
Key Points Supporting Troubleshooting
Remarks
1
Image feature, including dark strips and noise
The following two tables show the image
features and the related description.
2
Image features when contact occurs between
different types of probe and the different probe
sockets.

Mindray DC-8 EXP Specifications

General

Brand	Mindray
Model	DC-8 EXP
Category	Medical Equipment
Language	English