Fri-Jado BS10i, Service Manual

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Electrical tests
Page 29 Page 29
Service Manual Bake Star intelligent
PKII
form 9123665 rev. 06/2013
16,3Ω
Working principle.
Depending on the model, 3 up to 10 lamps
can be mounted.
The number of lamps is devided over the 2
secundairy coils of the transformer.
All lamps are 12V- 20Watt halogen.
To increase the lifetime, a 230V --> 11,6V
transformer is used.
The BS3 and 5 have a 100W transformer.
The BS8 and 10 have a 200W transformer.
The overview shows how to measure the
resistances.
Note!! that in case of the BS5, the secundairy
coils of the transformer have a parrallel
connection. This is because one of the coils
would be overloaded. See diagrams.
The transformer has a thermal protection
on both secondairy coils. See the 2 yellow
squares in the not-moulded transformer
below. It is therefore important to keep
that side cool. The opposite side has to be
mounted facing the oven side!!
During a very short period in 2007, an elec-
tronic transformer has been used. It is
impossible to measure by resistance if this
transformer is ok or not. A minimum load
of 35Watt has to be connected, before the
11,5 Volt can be measured.
0,12 Ω 0,12 Ω
4,65Ω
230V~
100 Watt
0,10 Ω 0,10 Ω
100 Watt
200 Watt
50W 50W 50W 50W
40W 60W
100W 100W 100W 100W
!
230V~
100 Watt 230V~
200 Watt 230V~
200 Watt
Output 11,6V
12V 20W Lamps
BS3 BS5 BS8 BS10
Oven side
MEASURING ON THE ILLUMINATION TRANSFORMER
!