Innomed Medical Hear Screen 112C-1, Service Manual

Page: 16 / 47

Innomed Medical Heart Screen 112C-1 Service manual
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5 Board level measurements
5.1 MAIN board volage test:
5.1.1 Checking voltages
– digital circuits
Check d5V voltage at test point J3/1 5V +/-5%
Check Vref +2.5V voltage at test point J3/7 5V +/-2%
5.1.2 Checking voltages
– Analog part
Check VCCAN buffer voltage at capacitor C109 6V +/-5%
Check analogue power supply 3.3V at JP5
3.3V +/-5%
Check Ref_Master voltage 1.8V at C45 1.8V +/-2%
Check Ref_Slave voltage 1.8V at C74 1.8V +/-2%
5.2
Voltage tests on the “interface” board
5.2.1 Checking voltages
Check voltage on J3/6 pontján: +3,3V +/-5%
Check HEAD VOLTAGE during printing on the two
poles of C23
+7,8V +/-5%