88 6H4866-02Test ProcedureLaser WarningWhen a service operation is taking place with the cover removed, disconnect the Laser according to the procedurein “Laser Board Replacement” on Page 54. If the Laser must be activated during the service procedure, wearprotective safety glasses at all times.Black Probe Attachment Point[1] Confirm that the Top W0 Sensor functions by the following test:(a) Connect a DVM as follows:• Red Probe-Connect to middle pin of the 511 connector on the Sensor Board.• Black Probe-Attach to yellow ground wire ground (See Figure above .)(b) Check that the initial voltage must be zero and not exceed 0.5V.(c) With the DVM still attached, insert a Cassette into the Scanner.(d) When the Screen is between the two parts of the W0 Sensor, the voltage should be 4.5-5.0V.
