Brother BAS-415 - Page 71

Connector
Connecting point Drive signals
Symptoms resulting from bad
No. connection
P12
Main circuit board- cap sensor
cap
frame overtravel signal
·
Cap frame home position is not detected.
cap
frame home position signal
·
When power is turned on, "overtravel" is
displayed.
· Machine cannot enter cap frame mode.
P13
Main circuit board Input/Output signal of FDD
· FDD does not function.
-3.5 in. floppy disk drive
· Data in floppy disk cannot be read.
P14
Main circuit board FDD power supply
- 3.5 in. floppy disk drive
P15
Main circuit board
Serial comminucation control
• Comminucation with editing system cannot
-Editing system or paper tape signal be done. (Data cannot be received.)
reader
· Data in the tape cannot be read through
paper tape reader.
P16
Main circuit board
Operation keyboard control
· Nothing happens after power is turned on.
-Operation keyboard signal
· Display is blank.
P17
Main circuit board
Needle
up signal
· Synchronizing signal
-Synchronizer
· Timing pulse signal
P18
Main circuit board
X-Y feed synchronize signal · Thread trimming is not performed.
-Rotary encoder
· Hoop and holder base do not move either in
X
or Y direction.
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From the library of: Superior Sewing Machine & Supply LLC