
Innomed Medical
Heart Screen 60G-80G-L
Service manual
2014.01.09 31/84
D-5450-1-B_HS60G80GL_SM_ENG.doc
7 Card level measurements –
60G&80G-L Interface Boards
7.1
Checking voltages
Connect the power supply set to 9V/1A to the connection of the accu pack on the Main Boar and connect the Interface
Board. Don’t connect the printer to the Interface Board.
Check the switch on/off possibilities. Switch on and off the device by the on/off button.
Check the following signals:
Measurement point
Nominal value
Tolerance
Comment
J1.3 2.5V
+/-0,1V
Vref
J1.2 0V
+/-0,1V
HEADPOWER
GND can be found at the point of J1.4.
7.2
Checking basic functions
Check the following:
Test procedure
Comment
Backlight test
Backlight is operational when the device is on.
Contrast test
The LCD contrast is acceptable, not foggy, the LCD is operational.
Keyboard test
In the test menu (HS80G-L) or make sure the appropriate function is
performed when the buttons are pressed (HS60G)
7.3
Checking printing
7.3.1 With printer partially connected
1.
Connect a 4700uF capacitor in parallel with the power supply (9V max. current limit) substituting the battery.
2.
Connect only the printer motor connection and load the paper. Connect a short on the ECG input.
Test procedure
Comment
Burn impulse test
Start from the test menu (HS80G-L) or with the REC button (HS60G).
Max. 5ms burn time, measure at J1.1 on the Interface Board (active signal at high
level).
Simultaneously with the burn impulse test check the following:
Measurement place
Nominal value Tolerance
Comment
Interface Board J1.2
7.2V
+/-0.1V
HEADPOWER
3.
Stop supplying burn impulses. After approx. 3 seconds measure the burn voltage.
Measurement place
Nominal value Tolerance
Comment
Interface Board J1.2
7.2V
+/-0.1V
HEADPOWER
7.3.2 Print test with printer
Connect the burning head as well and start 50mm/sec on-line printing. Watch the signal shape, that the displayed
curves are continuous, there are no breaks, spikes, faded sections.
Further, measure the power consumption at the battery connection’s negative point:
Measurement place
Nominal value
Comment
Main Board J4.2
1-2.5 A fluctuating
Current from the battery.
Содержание Heart Screen 60 G
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