ELNA E9020, Service Manual

Page: 52 / 56

50
[Mocrocomputer circuit
board block diagram]
1
CN1
CN29
CN16
CN5
CN2
CN11
CN13
CN31
CN32
CN34
CN20
CN24 CN14 CN22 CN27 CN28
CN35
CN30
CN4
CN12
CN21
CN25
CN26
CN33
CN8 CN18
CN19 CN9 CN6
CN7
13
7
3
2
3
2
3
4
3
3
6
CN101
CN102
7
3
2
3
2
3
3
7
5 4 4
4 15 48 5 5
6
5
3
2
26
10
10
2
CN76
CN77
CN79
2
4 4
4
2
2
4
2
2
2
4
CN78
4
4
CN73
2 2
CN74
CN72
CN75
CN71
1
2
CN51
1
2
AC120V
or
AC230V
CN50
TE2
TE1
1
CN63 CN62
CN65
CN67
CN66
CN64
CN61
AC13.5V 2
6
2
5
2
4
2
AC28V,AC24V,
AC12V
+24V,+28V
+5V
CN3
CN23
9
1
SW circuit board
Start/stop SW
Reverse SW
Thread trimming SW
2
With/without bobbin thread sensor circuit board
3
Slide VR
4
Controller socket
5
Card lid SW circuit board
6
Light/shade VR circuit board
7
Needle thread breakage detecting circuit board
8
Presser lifting SW
9
Potentiometer
!0
Thread winding SW
!1
Buttonholing stop SW Buttonholing start SW
!2
Used at the time of production
!3
Remaining amount sensor circuit board
(emitting light)
Bobbin thread remaining amount sensor
Limit sensor
1
2
3
4
5
6
7
8
9
!0
!1
!2
!3
!4
!5
!6
!7
!8
!9
@0
@1
@2
@3
@4
@5
@6
@7
@8
@9
#0
#1
#3
#4
#5
#6
#8
#9
$0
$1
$2
$3
$4
$5
$68
$7
$8
$9
!4
Remaining amount sensor circuit board
(receiving light)
Bobbin thread remaining amount sensor
Limit sensor
!5
Feed STM
!6
Needle throw STM
!7
Disengagement detecting circuit board
!8
Main shaft detecting circuit board
Up/down stop
Needle throw, feed timing
Needle threading timing
Bobbin thread winding timing
Lateral feed timing
!9
Display circuit board
LCD 320 x 240 dots
@0
Touch panel
@1
Lateral feed STM
@2
Threading STM
@3
Transfer body detecting circuit board
@4
CFL (backlighting)
Cold cathode valve
@5
ROM adaptor circuit board
@6
Bobbin thread supply STM
@7
Drawing STM
@8
Bobbin thread origin sensor circuit board
@9
Thread retaining plate cover sensor circuit board
#0
Inverter circuit board
Power for backlighting (CFL)
#1
Memory card
#2
DF sensor circuit boad
#3
Serial communication connector
#4
Power circuit board
#5
Sewing machine lamp
#6
Power SW
#7
Filter circuit board
#8
Power transformer (asm.)
#9
Motor pulse detecting circuit board
$0
Main motor
Microcomputer circuit board
$1
Thermistor
$2
Embridering device detecting SW
$3
Y origin detecting SW
$4
X origin detecting SW
$5
Frame SW 1 Frame SW 2 Frame SW 3
$6
Embroidering device
$7
Embroidery Y STM
$8
Embroidery X STM
$9
Eject lever detecting SW
CN36
2
#5
#2
#7