Brother International MD-817 Service Manual - Page 80

Sewing, Machine, Control, System, Block, Diagram

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SEWING MACHINE CONTROL SYSTEM BLOCK DIAGRAM MD-806, 816 Pedal Front SW Rear SW Actuator SW Presser SW Synchronizer DN UP E NC. NO sync Trans former CN6 +35V h12V Power Supply 5V + OV 12P Hic 1 6P INP Circuit CN9 Hic 3 ENC CONT 5) CP7 Motor Lock Protect Machine Brake Timing '.$ Y2 Photo Y, S printed-circuit Power ON-OFF board BPD500-1 Detection CPU M38002M Hic2 Drive Circuit 2P 12P fiP Pho toX Machine Brake Reverse Feed Solenoid Trimmer Solenoid Wiper Solenoid Presser Solenoid Start Repeat Tack Speed Back Tack Speed Pedal Speed Electric Brake Operation Panel HiC1 INP Circuit Slow Start t)4 Correct CrO-• tA

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SEWING
MACHINE
CONTROL
SYSTEM
BLOCK
DIAGRAM
MD
-806,
816
Pedal
Front
SW
Rear
SW
Actuator
SW
Presser
SW
Synchronizer
DN
UP
E
NC.
NO
sync
Trans
former
CN6
Power
Supply
+35V
h12V
5V
+
OV
12P
6P
CN9
Hic
1
INP
Circuit
Hic
3
ENC
CONT
5)
CP7
Motor
Lock
Protect
Machine
Brake
Timing
Y2
'.$
Photo
Y,
CPU
M38002M
Power
ON
-OFF
Detection
S
printed
-circuit
board
BPD500-1
Hic2
Drive
Circuit
2P
12P
fi
P
Machine
Brake
Reverse
Feed
Solenoid
Trimmer
Solenoid
Wiper
Solenoid
Presser
Solenoid
Pho
toX
Start
Repeat
Tack
Speed
Tack
Speed
Back
Pedal
Speed
Electric
Brake
Operation
Panel
Start
Tack
SW
End
Tack
SW
HiC1
INP
Circuit
Repeat
Tack
SW
Slow
Start
CNIO
Fixed
Stitches
SW
t)4
Correct
Fixed
4
Trimmer
SW
CrO—•
Half
Step
SW
fon
Counter
A.
B
C.
D.
tA
<To
--
Needle
Pos