Test
2017-03-23 / DIS 184_58300000197442_ARA_EN_A
Copyright by BSH Hausgeräte GmbH
Page 51 of 101
5.6
Checking the lighting in the cooking
compartment
5.6.1
Checking the function
1.
•
The cooking compartment lighting switches on when the
door is opened.
•
If the door remains open, then after 15 minutes the cooking
compartment lighting will automatically switch off.
Open the appliance door.
Result:
The light comes on.
The light switches off after 15 minutes.
2.
In the basic settings you can specify that the cooking
compartment lighting should not switch on while the appliance
is in operation.
Check the basic settings.
Result:
Lighting
In operation ON
or
In operation OFF
5.6.2
Checking the components
•
LEDs are operated with direct current.
•
A number of LEDs can be connected in series.
•
The LED connector K138.X25 is short-circuit-proof.
•
The different circuitry of the K138.X35 LED connector may give rise to different
voltages. With one LED, about 3.5 V, with two LEDs, about 7 V and with three
LEDs in series about 10.5 V.
•
LEDs cannot be measured directly using customer service equipment.
Required tools:
?
Multimeter [ 15000062]
Prerequisite:
•
Appliance is disconnected from the power supply.
•
Appliance has been removed. (Page 89)
•
Upper section of the housing has been removed. (Page 85)
•
Cabinet back panel has been removed. (Page 86)
LEDs’ service life can be reduced by power surges!
► Never plug in an LED while the power is on.
1. Check that the connection cable from the control power module (Control-
Power-Module for short, CPM) to the U2 distributer has no breaks or bad
contacts (only if there is more than one LED).
2. Check the U2 distributor for wire breaks or bad contacts.
3. Disconnect the plug U2 from the CPM K138.X25 to the distributor.
4. Connect a meter to the CPM K138.X25.1 and X25.2.
5. Connect the appliance to the power supply and complete the initial start-up.
6. Launch the test program – component test – oven light
K24
.
7. Measure the open circuit voltage of the CPM K138.X25.1 and X25.2.
Result:
22.6 V DC (maximum open circuit voltage is 24 V DC)
8. Terminate the test program – component test – oven light
K24
by pressing
on/off .
9. Don’t unplug E22 (U2.X91), the cable is too short for the test.
10. On the U2 distributor, disconnect the plug from the E23 (U2.X93).
11. On the U2 distributor, disconnect the plug from the E24 (U2.X92).
12. Plug LED E23 (right-hand side) directly onto the K138.X25 contact.
13. Set up the test program – component test – oven light
K24
.
Result:
LED lights up.
