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ERROR in the display and/or hum or bleep on the headphone
As a result of an intermitting contact, the text ERROR may appear on the display when the appliance is plugged in and switched on
(only occurs in HB935/A up to production code 0442).
This can be solved by assembling an extra PCB (item 49) according to the diagram shown on page 4 of the service manual and by
removing two "ground loops" according to de instructions on page 10.
Customers who have an HB935/B and complain about a hum or bleep: exchange the Error Fix PCB (item 49) fore one with a
resistance in the yellow wire and cut the "ground loops" according page 10.
If this gives problems because it does not fi t, you have to change item 14 complete!
After assemble the Error Fix PCB, always reset the timer.
Check if the PCB has been correctly assembled: the display turns black immediately after the plug is pulled out of the socket.
Procedure after removal of the back of the timer housing:
"UP"
1
- Disconnect red/black wire from the soundboard (1) and connect it to the Error Fix PCB at "UP" (2).
- Connect the yellow/black wire of the Error Fix PCB to the vacant connection of the sound PCB (3).
HB935/A /B /C /D
- Drawing to explain where the extra PCB should be
assembled.
- Connect red/black wire to Error Fix PCB at "SMPS".
3
2
11-12
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