ELCOM Euro-500 Handy Series Service Manual page 4

Euro-500TX Handy
4.5 Reinstallation of the main PCB...........................................................................39
4.6 EPROM reinstallation .........................................................................................39
4.7 Defective SRAM replacement or replacing the SRAM to higher capacity ..........40
4.8 NiCd accumulator reinstallation..........................................................................41
4.9 Reinstallation of the keyboard or individual keys................................................41
4.10 Reinstallation of displays ..................................................................................43
4.10.1 Reinstallation of displays for the ECR Euro-500TX Handy ...............................................43
4.10.2 Reinstallation of displays for the Greek version of Euro-500TX Handy ............................44
4.11 ECR connectors................................................................................................45
4.11.1 Connectors placed on the main PCB ................................................................................45
4.11.2 Connector for external devices..........................................................................................45
4.12 Segment LCD backlight installation..................................................................46
4.13 Connection of the external ECR drawer ...........................................................46
4.14 Connection of the external keyboard................................................................48
4.15 Connection of Euro-500TX Handy to the PC using the RS-232 interface ........48
4.16 Scanner and scales connection to the Euro-500TX Handy via the RS-232 inter-
face......................................................................................................................49
5 ECR tests ...................................................................................................................50
5.1 Display tests .......................................................................................................50
5.2 Printer tests ........................................................................................................51
5.2.1 Printing test .........................................................................................................................51
5.2.2 Thermal head position test ..................................................................................................51
5.2.3 Paper presence sensor test ................................................................................................51
5.3 Keyboard tests....................................................................................................52
5.3.1 Keyboard test 1 ...................................................................................................................52
5.3.2 Keyboard test 2 ...................................................................................................................52
5.4 Communication interfaces tests .........................................................................53
5.4.1 RS-232 serial interface test for PC......................................................................................53
5.4.2 RS-232 serial interface test for scanner and scales............................................................54
5.4.3 External PC keyboard interface test....................................................................................54
5.5 ECR drawer test.....................................................................................................................55
5.6 Fiscal memory tests............................................................................................55
5.6.1 FM data reading tests .........................................................................................................55
5.6.2 FM data writing tests .......................................................................................56
5.6.3 FM working voltages test ....................................................................................................56
5.6.4 FM control signals test 1 .....................................................................................................56
5.6.5 FM control signals test 2 .....................................................................................................57
5.7 EPROM checksum test ......................................................................................57
5.8 Accumulator tests ...............................................................................................57
5.8.1 Accumulator status test .......................................................................................................57
5.8.2 VCC1 power supply test......................................................................................................58
6 Troubleshooting ........................................................................................................59
6.1 Power supply troubleshooting ............................................................................59
6.2 Microprocessor troubleshooting .........................................................................60
6.3 Printing troubleshooting......................................................................................61
6.4 Display troubleshooting ......................................................................................63
6.5 Keyboard troubleshooting...................................................................................63
6.6 Communication troubleshooting .........................................................................64
6.7 Real-time and date troubleshooting....................................................................64
6.8 Miscellaneous troubleshooting ...........................................................................64
7 Ordering and listing of spare parts..........................................................................66
7.1 ECR parts classification......................................................................................66
Service manual
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