Breas PV 101+, Руководство по обслуживанию

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ELECTRONICS PV 101+/PV 102+ Service Manual
7–6 BREAS MEDICAL Doc. No. 003259 En Issue: X-1
7.4 Circuit board descriptions
This section contains detailed descriptions and figures of the PV 101+/PV 102+’s circuit
boards.
7.4.1 CPU board
All the push-buttons are mounted on the CPU board together with the LEDs and the
three bar-graphs for pressure display. Also mounted here is the four 7-segment displays
for the rise time and backup rate displays (PV 102+).
The microprocessor with its software is also located here, as well as an internal memory
(DALLAS) for the logging and storage of the patient usage data.
Refer also to the circuit diagrams (See section 7.6.1, 7.6.2, 7.6.3, 7.6.4 and 7.6.5) and
component location drawings (See section 7.7.1).
7.4.2 Power board
The power supply unit is fed primarily with mains power via the mains power inlet to the
internal AC/DC converter. Secondly, the power board can be fed with 12–24 DC via the
external battery input.
Refer also to the circuit diagrams (See section 7.6.6 and 7.6.7) and component location
drawings (See section 7.7.2 and 7.7.3).
The power supply has mains power as soon as the power cord is con-
nected.