−
111
−
Troubles
Cause (1)
Cause (2)
Checking order and adjusting method
Replace the MAIN circuit board. Replace the transistor.
Correctly set the memory switch.
Correctly set the memory switch.
Securely connect them.
Remove the cause and replace the fuse (5A).
Replace the hot wire plate (setting level is too high).
Correctly adjust and fix them.
Securely connect the connector.
Set the memory switch No. 23 to "1" (effective).
Check the memory switch No. 99.
(1942 ; 99-42, and 99-44 are with intermediate presser.)
1
6
.
Thread trimming solenod cannot be
turned OFF.
1
7
.
Thread cannot be trimmed. (H and G
types)
18.
Thread cannot be trimmed. (Z type)
1
9
.
Intermediate presser does not come
down.
16-1)
Shortcircuit of solenoid driving
transistor
17-1)
Model setting memory switch No.
99 is wrong.
18-1)
Hot wire plate is not heated at all.
18-2)
Temperature of the hot wire plate
is not raised.
19-1)
Solenoid valve cannot be turned
ON.
1-A)
Model setting memory switch No. 99
is wrong.
1-B)
Heater unit and control box are not
connected. (J46, J45, and J87)
1-C)
Fuse of the heater unit has blown.
1-D)
Hot wire plate has fused.
2-A)
Terminal board and screw of heater
unit and heater cord asm. are
loosened.
2-B)
Screw and nut of heater cord asm.
and element are loosened.
2-C)
Shortcircuit between heater element
and throat plate
1-A)
Disconnected J93 connector
1-B)
Memory switch No. 23 is set to "0"
(ineffective).
1-C) Memory switch No. 23 cannot be
indicated.
＊
If the screw is loosened between the hot wire plate and the heater unit, temperature of the hot wire plate is not raised. Prop
erly tighten the screw.
Summary of Contents for LK-1941
Page 2: ......
