tennat NOBLES S6, Техническое и сервисное руководство

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November 30, 2020
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PLDC04348
REVISION 00
November 09, 2020
TECHNICAL OFFICE
DISPLAY CIRCUIT BOARD
The sole function of the display pcb is to select and show activated functions and any errors that
the power pcb may detect when the machine is started up and/or in operation.
During operation, the battery charge Leds keep the user informed on the charge level of the
battery: Green indicates maximum charge level and Yellow indicates reserve level; when the
colour is Red and blinking, this indicates that battery power is low and all activated functions
will be suspended until the battery has been recharged. During recharge, the Leds indicate the
charge progress: Yellow denotes that the battery is recharging, and Green denotes that the
battery is fully charged.
The display circuit board is interfaced with the power circuit board by way of the 8-pin connector
“AMP 2” and supplied with power directly from the power pcb; the input voltage at connector
"AMP 2” is 5Vdc, measured across PIN 1 Vdc and PIN 2 GND.
The buzzer mounted on the display pcb is supplied with power directly from the power pcb; its
operation can be tested by connecting an input voltage of 5Vdc to PIN 7 +5Vdc and PIN 8 GND.
To check the connection between the display pcb and the power pcb, apply a jump across PIN 1
and PIN 6: if the machine starts up, then the connection is good; if not, there is a problem with
the display pcb.
The display circuit board is used to set the basic operating parameters of the machine, such
as frequency and duration of the filter shaker function, the sweeping pressure applied by the
brushes (2 different programs) and the type of battery installed.
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