TallyGenicom 3860 User Manual

Also see for 3860: Product guide Specifications Specifications Quick reference guide

Contents

TallyGenicom 3860 User Manual Manual pdf 93 page image

Maintenance and Troubleshooting 11-5Hex DumpSometimes when the printer is not printing what is expected, it is because the host is notsending the right control sequences, or the printer emulation does not match the hostemulation. The hex dump feature shows every byte of data that is sent from the host. Seethe chapter in the Programmer’s Manual that applies to the emulation used in order tointerpret the hex dump printout.Choose between two presentations of hex dump: standard and enhanced. Each presentationlists on the first line of the printout the status of certain signals on the currently selectedhardware interface. The standard presentation shows every byte of received data inhexadecimal. The enhanced hex dump prints mnemonics in place of control codes such asescape, carriage return, line feed, form feed, and so forth.From the Printed Menu, find Hex Dump in Test Options, which is under Interface Parameters.On the LCD menu, Hex Dump is under Utility.To dump the last line, push the ON LINE key twice. Reset hex dump by cycling power to theprinter.For example, if the printer is using one of the IBM emulations and receives the string “Maryhad a little lamb” where the word “little” is in boldface.Mary had a little lamb.The enhanced hex dump of the string above would look like the following:BUSY HI FAULT- LI PE HI SLCT HA SLCT IN- AM a r y SP h a d SP a SP ESC E l i tt l e SP ESC F l a m b . CR LFBUSY HI FAULT- LI PE HI SLCT HA SLCT IN- AFrom the IBM chapter in the Programmer’s Manual, note that ESC E turns on boldface, andESC F turns it off again.Serial Interface Loopback TestWhen using the serial interface, a loopback test can be run, for 80-column or 136-column asappropriate, from the Test Options menu. (Test Options is under Interface Parameters on thePrinted Menu.) To run this test, a loopback plug (a device that allows the printer to send datato itself) must be installed in the serial interface connector with the following pins connected:2-3, 4-5, and 6-20. See the Service Manual for more details. Correct printing of the testpattern in the loopback mode indicates that both the transmit and receive circuits in the printerare working correctly.