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Janome 1600P PROFESSIONAL -, Servicing Manual, Page: 2 / 29

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Janome 1600P PROFESSIONAL - Servicing Manual Download Page 2

Replacing the External Parts

Face plate .................................................................................................... 1

Top Cover ..................................................................................................... 1

Belt Cover .................................................................................................... 1

Motor Cover ................................................................................................. 1

Base ............................................................................................................. 1

Mechanical Adjustment

Needle Bar Height ........................................................................................ 2

Presser Bar Height ....................................................................................... 2

Feed Dog Height .......................................................................................... 3

Feed Dog Alignment .................................................................................... 3

Feed Cam Timing ......................................................................................... 4

Feed Lifting Cam Timing .............................................................................. 5

Needle to Hook Timing ................................................................................. 6

Clearance between Needle and Hook Point ................................................ 6

Hook Stopper Position ................................................................................. 7

Bobbin Winder Stopper ................................................................................ 8

Check Spring Stroke .................................................................................... 9

Pretension Dial ............................................................................................. 9

Knee Lifter Lever ........................................................................................ 10

Needle Stop Position .................................................................................. 11

Needle Threader (1600P only) ................................................................... 12

Replacing the Electronic Components

Location of the Electronic Components ..................................................... 13

Location of the Connectors ........................................................................ 14

Internal Wiring ............................................................................................ 15

Circuit Board-A ........................................................................................... 16

Circuit Board-F and Slide Volume .............................................................. 16

Driving Motor ........................................................................................ 17-18

Power Transformer ..................................................................................... 19

Machine Socket .......................................................................................... 19

Light Bulb ................................................................................................... 20

Adjustment of the Thread Cutter Mechanism

(1600P and 1600-DBX only)

Static Cutter Blade ..................................................................................... 21

Thread Cutter Blade ................................................................................... 22

Thread Guide Plate .................................................................................... 23

Needle to Cutter Cam Timing ..................................................................... 24

Thread Drawing Lever ................................................................................ 25

Auto Tension Release ................................................................................ 26

Thread Cutter Troubleshooting ................................................................... 27

Table of Contents

Summary of Contents for 1600P PROFESSIONAL -

Page 1: ...Servicing Manual 1600P 1600 DB 1600 DBX ...

Page 2: ...nee Lifter Lever 10 Needle Stop Position 11 Needle Threader 1600P only 12 Replacing the Electronic Components Location of the Electronic Components 13 Location of the Connectors 14 Internal Wiring 15 Circuit Board A 16 Circuit Board F and Slide Volume 16 Driving Motor 17 18 Power Transformer 19 Machine Socket 19 Light Bulb 20 Adjustment of the Thread Cutter Mechanism 1600P and 1600 DBX only Static...

Page 3: ...connector 6 Remove the top cover Remove the 3 setscrews 7 and remove the belt cover 8 NOTE When attaching the belt cover engage the hooks with the motor cover Remove the 3 setscrews 9 and remove the motor cover 10 Remove the 4 hinge screws 11 washers 12 rubber feet 13 and base washers 14 Remove the base 15 1 2 3 4 4 5 6 7 7 8 10 9 9 1 1 15 1 1 1 1 1 1 12 13 Follow the above procedures in reverse T...

Page 4: ...3 4 2 The distance between the bottom of the presser foot in up position and the needle plate should be 5 7 6 3 mm 1 Remove the face plate and needle 2 Lower the feed dog below the needle plate Place a block 6 mm thick under the presser foot and lower thepresser foot lifter Use the 4th step from the left of the Gauge 767G 001 3 Loosen the setscrew 1 Raise the presser foot lifter while holding pres...

Page 5: ...lots should be even The clearance between the front end of the center feed dog and center slot should be 4 2 4 8 mm when the stitch length dial is set at 0 1 Remove the base and lay the machine on its back 2 Set the stitch length dial at 0 3 Loosen the setscrews 1 Move the feed base 2 up or down to adjust the clearance 3 between the front end of the center feed dog and center slot to 4 5 mm Use th...

Page 6: ... follows To Adjust 1 Remove the base and lay the machine on its back 2 Lower the needle bar until the needle point is 17 9 mm for 1600P DB DBX or 17 5 mm for 1600P above the needle plate 1 Use the third step from the right for 17 9 mm or the marking for 17 5 mm on the Gauge 767G 001 3 Loosen the setscrews 2 While moving the reverse stitch lever turn the feed cam 3 in the direction either A or B un...

Page 7: ...he machine on its back You may set the stitch length dial at any position 2 Loosen the setscrew 3 Lower the needle bar until the needle point is level with the needle plate 1 1600P DB DBX or 0 4 mm below the needle plate 1600P 3 Loosen the setscrew 4 4 If the feed dogs are higher turn the feed lifting cam 5 in the direction A If the feed dogs are lower turn the feed lifting cam 5 in the direction ...

Page 8: ...ghten the setscrews 1 slightly and proceed with the adjustment of the clearance between the needle and hook point 4 1 2 3 Lowest position 2 mm 2 mm The clearance between the needle and hook point should be 0 0 1 mm 1 Turn the handwheel to bring the hook point 1 behind the needle 2 2 Knock on the hook race rim lightly to make a slight clearance between the needle and hook point NOTE Do not knock on...

Page 9: ...og 2 Loosen the setscrew 1 and move the hook stopper 2 so that the center of the needle 3 is located between the center of the hook stopper 4 and outer side of the hook stopper spring 5 3 Tighten the setscrew 1 and attach the feed dog needle plate and base 1 2 3 5 4 2 ...

Page 10: ... 19 5 mm in diameter 1 Loosen the setscrew 1 Turn the bobbin winder stopper 2 to adjust the thread amount If the amount is too much turn the stopper in the direction A If the amount is not enough turn the stopper in the direction B 2 Tighten the setscrew 1 firmly 1 2 A B 16 5 19 5 mm ...

Page 11: ...he length of thread drawn out Use the markings on the Gauge 767G 001 for 11 mm and 15 mm 5 Loosen the setscrew 4 and move the tension dial guide 5 to adjust the stroke If the length is too long turn the guide in the direc tion A If the length is too short turn the guide in the direc tion B 6 Tighten the setscrew 4 1 2 3 5 4 1 4 A B 11 15 mm 12 Pre tension Dial The standard position of the pretensi...

Page 12: ...w 3 to adjust the height If it is lower than 7 5 mm turn the adjusting screw 3 clockwise If it is higher than 7 5 mm turn the adjusting screw 3 counterclockwise Use the 5th step from the left of the Gauge 767G 001 for 7 5 mm 3 Tighten the nut 1 firmly and attach the base NOTE Lower the needle bar to the lowest position and check if the needle clamp does not hit against the presser foot when it is ...

Page 13: ...oint is 19 1 mm for 1600P DB DBX or 18 7 mm for DP 1600P above the upper surface of the needle plate 4 Use the first step from the right for 19 1 mm or the second step from the right for 18 7 mm 4 Loosen the setscrew 5 Rotate the upper shaft shielding plate 6 toward you until the green LED 7 turns on 5 Tighten the setscrew 5 and turn the power switch off 6 Attach the top cover 1 2 3 5 4 6 7 19 1 m...

Page 14: ...e threader hook 1 thrusts or hits against either left or right edge of the needle eye 2 Loosen the setscrew 3 Move the threader plate 4 to adjust the lateral position of the threader hook 1 2 If the threader hook 1 thrusts or hits against either top or bottom edge of the needle eye 2 or misses the needle eye 2 Loosen the setscrew 5 Move the threader position setting plate 6 up or down to adjust th...

Page 15: ...per shaft sensor Driving motor Machine socket Power transformer Circuit board MS Arm lamp Lamp Circuit board F Slide volume Circuit board A Bobbin winder motor Bobbin winder switch Upper shaft sensor Driving motor Machine socket Power transformer Circuit board MS Arm lamp Thread cutter switch Capacitor Push pull solenoid 1b Location of the Electronic Components 1600P and 1600P DBX ...

Page 16: ...winder switch Push pull solenoid Capacitor Upper shaft sensor Lamp Motor sensor Circuit board F Machine socket primary Power transformer primary Driving motor Machine socket secondary Slide volume Arm lamp Power transformer secondary Bobbin winder switch Upper shaft sensor Lamp 2b Location of the Connectors 1600P and 1600P DBX 2a Location of the Connectors 1600P DB NOTE only for 1600P and 1600 DBX...

Page 17: ...1 Thread cutter cord Cord guide 2 Motor cord Motor sensor cord Cord guide 1 Setscrews for cord guide 1 To prevent the internal wirings from contacting the moving parts or being caught in the joint of the external parts the internal wirings should properly be routed and secured as illus trated Cord binder NOTE The item marked with is applicable to 1600P and 1600 DBX only ...

Page 18: ...he remaining connectors and secure the cords with the cord clips 1 on the case lid Attach the top cover NOTE Do not disconnect the connectors by pulling on cord To disconnect grasp the connector not the cord 5 Circuit Board F and Slide Volume 1 Remove the top cover 2 Loosen the 4 setscrews 1 and remove the ornamental panel 2 3 Pull out the circuit board F connector from the circuit board A Remove ...

Page 19: ...the motor sensor connector 1 3 Pull out the motor connector 2 while pushing the connector lock 3 4 Remove the nuts 4 and driving motor 5 NOTE Do not disconnect the connectors by pulling on cord To disconnect grasp the connector not the cord to be continued on next page 1 4 5 3 2 2 ...

Page 20: ...osen the setscrews 5 slightly and move the motor up or down to adjust the motor belt tension The belt should deflect 4 5 mm when applying 300 grams of load to the middle of the belt Tighten the setscrews 5 firmly 3 Insert the motor connector 6 and motor sensor connector 7 4 Attach the motor cover and belt cover 1 2 3 5 4 6 Motor belt tension 4 5 mm 7 ...

Page 21: ...der 2 5 Remove the setscrews 3 and transformer 4 6 To attach follow the above procedure in reverse 8 Machine Socket 1 Remove the top cover belt cover and motor cover 2 Remove the board A case lid and pull out the ma chine socket connectors primary and secondary from the circuit board A 3 Remove the setscrews 1 and cord guide 2 4 Remove the setscrews 3 and machine socket 4 5 To attach follow the ab...

Page 22: ...ulb and push it into the lamp socket 4 Attach the face plate Light bulb under the sewing arm 1 Pry out the lamp window 1 with a screwdriver 2 Pull out the light bulb 2 from the lamp socket 3 3 Insert a new bulb and push it into the lamp socket 4 Attach the lamp window into the opening of the sewing arm and push the window to fix it 1 2 3 1 2 3 1 ...

Page 23: ...p the link body 1 to engage the thread cutter blade 2 and bring it under the static blade 3 3 Loosen the setscrews 4 and adjust the position of the static cutter blade 3 so that the distance be tween the center of the needle drop position 5 and the static cutter blade 3 is 4 mm and the left edges of the static blade and thread cutter blade are aligned Use the marking for 4 mm on the Gauge 767G 001...

Page 24: ...hing up the link body 3 to engage the thread cutter blade 2 and bring it to the end of the stroke 3 Loosen the nut 4 and move the thread cutter link 5 to the left or right to adjust the position of the thread cutter blade The point 6 of the thread cutter blade should be 2 2 5 mm from the center of the needle drop position 7 Use the marking for 2 2 mm on the Gauge 767G 001 4 Tighten the nut 4 Attac...

Page 25: ...uide plate should be approximately 1 4 mm from the center of the needle drop position 4 and the back inner edge 5 of the thread guide plate should be approximately 2 7 mm from the center of the needle drop position 4 Use the first step from the left of the Gauge 767G 001 for 2 7 mm 4 Tighten the flat screw firmly Attach the needle plate 1 2 3 5 4 1 4 mm 2 7 mm 2 7 mm ...

Page 26: ...r surface of the needle plate 5 when the thread drawing arm starts to move Use the 6th and 7th steps of the Gauge 767G 001 for 10 5 mm and 10 9mm 5 Loosen the 2 setscrews 6 and turn the hook shaft gear 7 to adjust the timing If the needle point is too high turn the hook shaft gear in the direction A If the needle point is too low turn the hook shaft gear in the direction B NOTES Hold the hook so t...

Page 27: ...upper surface of the needle plate 4 Push the solenoid disk 3 fully to swing the thread drawing lever 4 Loosen the setscrew 5 and move the thread draw ing arm 6 to the left or right so that the tip of the thread drawing lever 4 lightly contacts with the bobbin 5 Tighten the setscrew 5 6 Restore the stopper 2 and press it against the thread drawing lever 4 while pushing the solenoid disk 3 Tighten t...

Page 28: ...Set the tension dial at 4 and push the solenoid disk 1 fully to the right The tension disks should open 1 mm 3 Loosen the lock nut 2 and turn the adjusting nut 3 to adjust the gap between the tension disks If the gap is too wide tun the adjusting nut counter clockwise If the gap is too narrow tun the adjusting nut clock wise 4 Tighten the lock nut 2 1 mm 1 2 3 ...

Page 29: ...ot enough The needle to cutter cam timing is too early The thread drawing lever is out of position The static cutter blade is out of position Replace or grind the static cutter blade Adjust the position of the static cutter blade see page 21 Reset the needle at the proper angle Reduce the check spring stroke see page 11 Adjust the needle to hook timing see page 6 Adjust the stroke of the thread cu...

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