ELCOM Euro-500T Handy, Руководство по обслуживанию

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© Elcom Ltd.
Service manual
Euro-500T Handy
mechanical damage or non-functionality of the internal
sensor of the printer paper ribbon (receipt) - replace the printer
•
the cash register reports a shift of the printer head
faulty HS signal - check the interconnection
- check if the lever of the mechanism is pushed to its
terminative position
- use the multimeter to measure the voltage value of the VH
signal (shifted head - approx. 0 V, in a usual position -
approx. 5 V; when the VCC1 power supply is switched on)
- check the voltage of the VCC1 supply
- check or replace R76, R53, C24
faulty sensor of the head position - replace the printer
•
the cash register reports overheating of the head
faulty TS signal - check the interconnection
- use the multimeter to measure the voltage value of the TS
signal (Its value at room temperature is approx. 2 V,
when the VCC1 supply is switched on. The voltage of a
signal decreases with increasing temperature)
- check or replace R37, R78, C30
faulty printer thermostore - replace the printer
6.4 Failures of visual display
•
the displays either do not display at all or display all segments
faulty interconnection of the mainboard and
the PCB Interconnect - check if the PR&DISP1 connector is properly pushed in the
mainboard and also check the entirety of the cable
connected to this connector
faulty interconnection of PCB Interconnect and
the customer display - check if the customer display connector is properly
pushed-in, check the entirety of the cable too
faulty module of the display - replace the whole module either of the customer or of the
cashier display
fault on the cash register mainboard - examine the cash register functionality according to
chapters 6.1 and 6.2
6.5 Failures of keyboard
•
a key doesn’t work at all or it does but irregularly
damaged silicon liner of the keyboard - replace the silicon liner
damaged impact carbon facet of the keyboard - replace the whole keyboard module; to achieve the best
effect, replace the silicon liner too
•
majority of the keys don’t react to pressing
damaged FFC 16-conductor patching cable - measure or replace the 16-conductor patching cable of the
mainboard and keyboard PCB
damaged circuits on the keyboard PCB - replace the D1 - D8 diodes and the U1 circuit or replace the
whole keyboard module
•
the cash register doesn’t react to any of the pressed keys (the time is displayed correctly)
damaged FFC 16-conductor patching cable - measure or replace the 16-conductor patching cable of the
mainboard and keyboard PCB
damaged keyboard module - replace the whole keyboard module
damaged circuit for scanning of the keybooard - replace the U20 circuit
•
the cash register doesn’t react to any of the pressed keys (the cash register displays the faulty data,
doesn’t display at all, static time)
the fault is probably not in the keyboard - follow the instructions from the chapter 6.1