Fri-Jado BS10i, Service Manual

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TROUBLE SHOOTING
Page 35 Page 35
Service Manual Bake Star intelligent
PKII
form 9123665 rev. 06/2013
TROUBLE SHOOTING BY PART / FUNCTION.
Almost any problem can be caused by defect controller boards and therefore this will not be
mentioned each time.
Description of
part / function Symptoms Possible cause Action
Controller Key board fails. Loose flatcable. Check both key foil cables.
See I/O test in service menu
for function check.
Broken key foil or bad
contact. Replace key foil and/or clean
contacts.
Moist on key foil Clean and search cause.
No display. Cable loose or bad con-
tact between CPU and
LCD. Check
Back light wiring loose or
bad contact (white and
pink wire) Check
Ribbon cable to Power&
I/O board loose or defect. Check
Broken fuse on
Power&I/O board. Check fuse and/or replace.
125mA slow acting (5x20)
Broken display or cpu.
Broken Power&I/O board
Display shows strange
things or the controller is
acting strange. Cable loose or bad con-
tact between CPU and
LCD.
Broken display.
Temperature too high.
Check cooling air flow and
blower. Clean grids.
Moist on pcb boards. Clean and search cause.
Unit does not switch on No mains power on
Power&I/O board. Measure voltage and make
sure power is supplied.
Broken fuse on
Power&I/O board. See if leds are blinking.
Check if no.
Broken Power&I/O board See if leds are blinking.
Replace if no and fuse is ok.
Broken CPU board See if leds are blinking on
Power&I/O board. Replace if
yes.
Outputs of Power&I/O
board fail. Mains wires interchanged
on terminals X14 and X15 Put wire 9 on X14 and wire
19 on X15
Broken Power&I/O board. Replace
Wrong “device type” set-
ting in service menu
Refer to parameter list in
chapter programming in-
structions
Inputs of Power&I/O board
fail. Broken Power&I/O board.
Wrong “device type” set-
ting in service menu
Refer to parameter list in
chapter programming in-
structions