BIXOLON SRP-270 service manual Troubleshooting

SRP-270

7. Troubleshooting

7-1 Power Problem

•Check the Power Out on SMPS.

•Check the Fuse.

•Check the related Pattern.

•Check the IC34063.

7-2 System Problem

•Check the Reset part (IC & Pattern)

•Check the Clock on FS741 (14.7456MHz)

•Check the Adr/Data line Pattern

7-3 Printer Problem

•Check the Feed Motor Signal on CPU

•Check the Feed Motor Block on PCB (STA471, Step Motor Connection)

•Check the Carriage Motor Signal on CPU

•Check the Carriage Motor Block on PCB (STA471, Step Motor Connection)

•Check the Ribbon Select Signal on 74HCT574 (U22)

•Check the Ribbon Block on PCB (STA471, Connection)

•Check the Auto Cutter Signal on 74HCT574 (U22)

•Check the Auto Cutter Block on PCB (TA8428K, Connection)

•Check the Near-End, Home Sensing Signal on Main PBA.

•Check the Sensing Block. (Sensor, Harness)

•Check the Head Trigger Signal, Head Signal on CPU.

•Check Dot Printing Block on Main PBA. (STA471, 74HCT05, Connection)

7-4 Cash Drawer Problem

•Check the Drawer Connector & Harness.

•Check the Drawer Signals on 74HCT574.

•Check the Drawer Block on Main PBA (STA471, Connection).

7-5 DIP S/W Problem

•Check the Output Signal (DIP R1~4)

•Check the Diode.

•Check the Input Signal (DIP C1~C4)

•Check the related Circuit & Pattern

7-6 RS232 Problem

•Check the connection of the RS-232C CONN and Other side.

•Check the I/F Cable whether it is open or short.

•Check the Txd, Rxd Pin on CPU.

•Check the MAX232 Driving Chip and related Circuit on I/F PBA.

•Check the connection of the H/W handshaking Line and Other side (DTR/DSR)

7-7 RS485 Problem

•Check the connection of the RS-485 Connector and Other side.

•Check the I/F Cable whether it is open or short.

•Check the TXD, RXD Pin on CPU.

•Check the MAX488 Driving Chip and related Circuit on I/F PBA.

•Check the connection of the H/W handshaking Line and Other side (DR1,2/CS1,2)

•Check the Voltage Level of each Line.

Rev. 3.02 - 46 -