17
3-5 Thyristor replacement
Fig 3
‐
11 thyristor mounted position
Two thyristors are mounted at the right side of the chamber,refer to fig 3
‐
11,take down the right ABS
cover, you will see them.
Thyristor is fixed by four M4 screws, the left side is input terminal and the right side is output terminal.
Fig 3
‐
12 Thyristor
Thyristor wiring layout
Refer to fig 3
‐
12, one of the input terminals nearby signal teminal is neutral, and the other is live. Neutral side
is always conductive between input and output,but the live is controlled by thyristor,its conductive feature is
controlled by signal.Control signal is afford from JP4
‐
15~20 pins,pin 15,17 and 19 belong to the first
thyristor,pin 16,18 and 20 belong to the second one, the range of control signal is from 0 to 10 direct current
represent various power.
The first one
The second one
18
TOPEX service manual
Fig 3
‐
13 is the wiring layout of thyristor.
Fig 3
‐
13 Thyristor wiring layout
3-6 Exhaust fan replacement
Fig 3
‐
14 Exhaust fan mounted position
Exhaust fan is installed at the top of chamber ,refer to fig 3
‐
14. Take down plastic covers,then you can
replace the exhaust fan.Exhaust fan is assembled with exhaust duct together, so it is no need for disassembling
them when you want to replace exhaust fan,refer to fig 3
‐
15.