Fault Finding Diagram - Husqvarna 1200 Service Manual

Fault-finding diagram
A. The keys of the cassette do not function.
1. Check that none of the keys of the machine stayspressed.
(applies to all keys of the front panel)
2. Check that there is no bad contact in the connection from the
foil keyboard of the front cover (and in other cable connections).
3. Try a new front cover, compl. with foil keyboard or just foil keyboard (P.46).
4. Try a new guideboard (P.44).
5. Try a new LCD- board (P.44).
B. The keys of the cassette give a seam from another cassette.
1. Check by means of the service cassette that the machine reads the
correct cassette.
2. Check that the keying on the left of the cassette is correct.
Compare with another cassette.
3. If not. Check that the code spring of the cassette is freed from or
is pressing sufficiently against its contact points on the foil
keyboard. If not exchange code spring (P.46).
4. Try a new front cover,compl. with foil keyboard or just foil keyboard (P.46).
C. All or some of the keys below the panel do not function.
1. Check that none of the keys of the machine stays pressed.
2. Try a new LCD-board (P.44).
D. All or some of the keys of the sewing advisor do not function.
1. Check that none of the keys of the machine stays pressed.
2. Check the connection to the guideboard.
3. Try a new guide-board (P.44).
E. All or some of the keys of the upper foil keyboard do not function.
1050/1070/1090
1. Check the cable connection of the foil keyboard to the circuit board.
2. Try a new foil keyboard.
3. Try a new circuit board (P.48).
F. All or some of the keys of the lower foil keyboard do not function.
1050/1070/1090
1. Check the cable connection of the foil keyboard to the circuit board.
2. Try a new foil keyboard.
3. Try a new circuit board (P.48).
G. None of the keys of the machine functions.
1. Check that none of the keys of the machine stays pressed.
2. Replace the memo-chip (P.45).
3. Try a new LCD-board (P.44).
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