Circuit Board Connection Diagram - ELNA E9020 Service Manual

[6] Circuit board connection diagram

[Microcomputer circuit board]
Table of microcomputer circuit board connector
Connector No. Connection
CN-1 S/S, thread trim, reverse feed, with/without exclusive bobbin thread,
etc.
CN-2 Potentiometer
CN-3 Buttonholing SW
CN-4 Motor pulse
CN-5 Presser lifting SW
CN-6 Disengagement detecting circuit board
CN-7 Needle throw STM
CN-8 Threading STM relay lead wire, transfer body detecting circuit board
CN-9 With/without needle thread detecting circuit board
CN-11 Thread wind SW
CN-12 Motor thermistor
CN-13 Terminal used at the time of production
CN-14 Display circuit board relay lead wire
CN-16 Needle thread breakage detecting circuit board
CN-18 Bobbin thread origin sensor circuit board, thread retaining plate cover
sensor circuit board
CN-19 Bobbin thread supply STM
Replacing the microcomputer circuit board
CN20
CN24
CN36
CN26 CN25
CN30
CN31
CN32
CN33
CN34
CN35 CN29
CN23
Check
9PIN 3.3V ; 12PIN 5V ; 3.11PIN GND ;
14PIN 270Ω
1PIN 3.3V ; 3PIN GND
2PIN GND
1PIN 5V ; 3PIN GND
1PIN 5V ; 3PIN GND
1-2PIN, 3-4PIN 4.2Ω
1-2PIN, 3-4PIN 10Ω ; 5PIN 5V ; 7PIN GND
1-2PIN, 3-4PIN 4.2Ω
1PIN-GND
For assembling
2PIN 20 to 24V ; 7PIN GND ; 6PIN 5V
1PIN 5V ; 2PIN-GND 270Ω
1,5PIN GND ; 3PIN 5V
1-3PIN, 2-4PIN 20Ω
CN19
CN18
CN8 CN6
CN9 CN7
CN16
CN13
CN21
CN12
CN14
Connector No. Connection
CN-20 Feed STM relay lead wire
CN-21 Embroidery card connector
CN-22 ROM adaptor
CN-23 Serial communication connector
CN-24 Touch panel connecting wire
CN-25 Driver binding wire A
CN-26 Driver binding wire B
CN-27 ROM adaptor
CN-28 ROM adaptor
CN-29 Controller socket, card lid SW circuit board, light and shade VR circuit
board
CN-30 Power circuit board connecting wire
CN-31 Remaining amount sensor circuit board (receiving light)
CN-32 Remaining amount sensor circuit board (emitting light)
CN-33 Lateral feed STM relay lead wire
CN-34 Main shaft detecting circuit board
CN-35 Power supply connecting wire
CN-36 DF sensor circuit boad
CN1
CN2
CN3
CN4
CN5
• Be to turn the power OFF when inserting /
drawing out the connector of [CN14].
• Securely insert the connector until it will
CN11
go no further when inserting it.
LCD will be caused to break.
Check
1-2PIN, 3-4PIN 4.2Ω
1, 10, 11, 18, 23PIN GND
25PIN 3.3V ; 15, 34PIN GND
1PIN GND
7, 9PIN GND
5PIN 5V ; 1, 3, 7PIN GND
1-3PIN 16.8V
2PIN 5V
2PIN GND
1-2PIN, 3-4PIN 10.5Ω
2PIN 5V ; 5PIN-GND
2-1PIN 5V ; 4-3PIN 30V ; 6-5PIN 34V
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