DENTSPLY ProMix 400, Руководство по ремонту

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7.2.2
Display Board activates but switches are inactive.
Possible Causes Solutions
A. Power Supply See para 7.2.1 C
B. C.P.U. Board See para 7.2.1.D
C. Display Board If 7.2.2. A and B fail to correct problem replace
Display Board (Fig 1f)
7.2.3
Display Board Up(’) / Down(‘) keys operate properly, but on/off key
activation does not start the unit.
Possible Causes Solution
A. Door switch cable connections Locate power supply (Fig 1c). Check for
(Model 400, 120v) loose or open connections to J3 (Fig 3a). If loose in
connector, press into connector to insure proper
contact. If the problem persists replace door switch
cable assembly.
10
Figure 1e Figure 1f
Door Switch
Display Board
Pin 2
Pin 1
Pin 3
J2 Connector
Voltage Regulator (VRI)