GBC Shredmaster 5160X, Service Manual

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6
5.O TROUBLESHOOTING
5.3 Electrical Components
Stand-by/Off/Reverse Switch - The
Stand-by/Off/Reverse switch, when
depressed, connects the hot
and neutral circuits to electrical
components of the shredder.
Machine Head Safety Sensors
- The
safety sensors are both normally open
hall effect switches which are actuated
by a magnet inside of the cabinet door
and the back panel of the cabinet. The
switches are normally closed when the
door is closed and when the machine
head is installed on the cabinet.
Flap Switch - The flap switch is a
normally open switch actuated by the
bag full flap. When the shred bag
becomes full of shredded material, the
bag full flap is pushed back and power
is then removed from the motor circuit.
Emitter - The infrared light beam from
the light emitting diode is sensed by the
receiver to activate/deactivate the
control board.
Receiver - The receiver is a light
activated diode which works in
conjunction with the emitter to
activate/deactivate the control board.
Door , Bag and Reverse Indicators
-
These LED’s illuminate when the
following condition occurs; When
the door is open, the shred bag is full or
when the shredder is jammed.
5.4 Testing Electrical Components
WARNING: Always
disconnect the power cord from
receptacle before making continuity
or resistance tests.
Switches
Set meter to read resistance. Check
switches for continuity from common to
closed contacts and infinity from
common to the open contact.
Emitter - Set meter to the diode setting.
Disconnect emitters from the control
board. With the positive meter probe on
the black stripped emitter wire and the
negative meter probe on the gray
emitter wire, check for .737 ohms.
Reverse the meter leads and infinity
should be read.
Receiver - Set meter to read 20M
ohms. Disconnect the receiver from the
control board. With the positive meter
probe on the gray wire and the negative
meter probe on the black receiver wire
check for 1.47 Mega ohms under
normal room light. The resistance will
increase when blocked. Reverse the
meter leads and infinity should be read.