NCR 7156, Service Manual

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7156 Service Guide Appendix A: Printer Specifications
September 1998 167
Power from Power Supply
The power supply must provide a +24V line of power to the printer, which must be
regulated
±
5% at the printer. Surge protection must be provided. To do this, place a 2.0
Ampere time delay fuse on the +24V line.
Maximum Current
Voltage Station Short Term Long Term
24 Volts ± 10% Slip 10.0 Amps 2.0 Amps
Receipt 6.5 Amps 2.0 Amps
With remote 2x20 pass-
through display 2.35 Amps 2.35 Amps
Environmental Requirements
Operating Temperature
5°C to 45°C (40°F to 112°F), models with knife
5°C to 50°C (40°F to 120°F), models with no knife
Operating Humidity 5% to 90%
Condensation may occur when equipment is transferred from cold to warm
areas after shipment. The printer's design permits operation after drying out and
stabilizing at room temperature.
Reliability
The numbers in the table refer to the Mean Cycle Between Failure (MCBF) for the items
indicated.
Thermal Receipt Printer
36 Million Print Lines
Impact Slip Printer
15 Million Print Lines
Impact Printhead
200 Million Characters
Electronics
240,000 Ontime Hours
Knife
1 Million Cuts
MICR Check Reader
200,000 Reads
Ribbon Cassette
3 Million Characters
Power Supply
100,000 On-time Hours