ELCOM Euro-500 Handy Series Service Manual page 6

Euro-500TX Handy Service manual
© Elcom, s. r. o.
Table of figures
Fig. 1.1: Block chart of ECR Euro-500TX.........................................................................9
Fig. 2.1 Primary power supply ........................................................................................10
Fig. 2.2 +5 V power supply and the NMI signal generator .............................................10
Fig. 2.3 VCC1 power supply........................................................................................... 11
Fig. 2.4 VH power supply ............................................................................................... 11
Fig. 2.5 Accumulator voltage converter circuit................................................................ 11
Fig. 2.6 NiMH accumulator charging circuit....................................................................12
Fig. 2.7 FM power supply circuits ...................................................................................12
Fig. 2.8 The E-500TXN microcontroller ..........................................................................13
Fig. 2.9 Memory connexion ............................................................................................15
Fig. 2.10 Reset controller ...............................................................................................16
Fig. 2.11 Standby controller............................................................................................16
Fig. 2.12 Real-time circuit...............................................................................................16
Fig. 2.13 Printer control signals ......................................................................................17
Fig. 2.14 Printer motor control and control of the journal winding motor ........................17
Fig. 2.15 Journal winding motor connexion ....................................................................18
Fig. 2.16 Receipt paper tape detection in the printer .....................................................18
Fig. 2.17 Journal paper tape detection in the printer ......................................................18
Fig. 2.18 Measuring the printer head temperature .........................................................18
Fig. 2.19 Detecting the printer head position..................................................................18
Fig. 2.20 Connectors for fitting the interconnect PCB ....................................................18
Fig. 2.21 Keyboard connexion scheme ..........................................................................19
Fig. 2.22 Signal chart on the 7442 decoder (outlets A - C)............................................19
Fig. 2.23 Signal chart on the 7442 decoder (outlets 0 - 7) ............................................19
Fig. 2.24 The display control in the Euro-500TX Handy.................................................20
Fig. 2.25 Segment LCD and the NJU6432B display controller connexion .....................21
Fig. 2.26 NJU6432B display controller connexion..........................................................21
Fig. 2.27 View on the display placement in Euro-500TX Handy ....................................22
Fig. 2.28 View on the display placement in Greek version of Euro-500TX Handy .........22
Fig. 2.29 Communication circuits and the external PC keyboard interface ....................23
Fig. 2.30 Connectors for fitting the connectors PCB ......................................................24
Fig. 2.31 FM connexion ..................................................................................................24
Fig. 2.32 Power supply voltage checking circuits ...........................................................25
Fig. 2.33 Buzzer circuit ...................................................................................................25
Fig. 2.34 Drawer opening circuit and the opening signal chart ......................................25
Fig. 2.35 The circuit reading the keyboard and jumpers' status .....................................25
Fig. 2.36 Individual ECR connectors pin connexion .......................................................26
Fig. 2.37 Connector PCB connexion ..............................................................................26
Fig. 3.1 Thermal head connexion ...................................................................................27
Fig. 3.2 Printing data placement.....................................................................................28
Fig. 3.3 Time diagram ....................................................................................................28
Fig. 3.4 Performance signals of the step-motor .............................................................29
Fig. 3.5 Control circuit ....................................................................................................29