555QE Service Manual
1
555
QE
Service Manual
Page 1: ...555QE Service Manual 1 555 QE Service Manual ...
Page 2: ...ance in rotary hook 8 7 Timing of Rotary hook 9 8 Positioning of bobbin case 10 9 Upper tension dial 11 10 Tension of bobbin case 12 11 Auto needle threader 13 12 Open external cover 14 13 Adjust starting point 15 14 Location of Circuit boards 16 15 Circuit cord connections 17 16 Change feeding stepping motor 128082 18 17 Auto buttonhole adjustment 19 18 Motor belt adjustment 20 ...
Page 3: ... presser foot is 6 0mm A Open face cover B Lift presser bar lever to upper position C Loosen hexagon screw A of presser bar guide bracket D Adjust presser bar until presser foot lifting height is 6 0mm E Tighten hexagon screw A CHECK Repeat the presser bar lifter down up for confirm the height of presser foot is 6 0mm ...
Page 4: ...g the needle CHECK A Open needle plate take bobbin case out B Turn the hand wheel counter clockwise to lower needle to lowest position C Check the distance between needle and bottom surface of rotary hook See below figure Note The needle sharp touches bottom surface of hook gently Adjustment A Loosen the hexagon screw A of needle bar rod link 281045004 and adjust its position to Up or Down until n...
Page 5: ...urn manually hand wheel to make needle lower into needle plate hole and check the distance between needle and right side left side in the needle plate hole Adjustment A Use 2 0mm hexagon screwdriver and loosen the hexagon screw A of needle bar crank B Use flathead screwdriver to adjust zigzag eccentric pin until the needle is in right correct position When you turn it clockwise the needle is moved...
Page 6: ...nt A Turn hand wheel to make needle rising to highest position B Open bottom cover C Use flathead screwdriver and turn the feed regulate screw 730171 clockwise until feed dog is raised to standard height when feed dog is lower than 0 9mm D Use flathead screwdriver and turn the feed regulate screw 730171 counter clockwise until feed dog is lowered to standard height when feed dog is higher than 1 1...
Page 7: ...n is too early use 2 5mm hexagon screwdriver to loosen the hexagon screw A of feed cam T4 29 and keep screwdriver in the screw as a handle to move the cam up for adjusting it to standard position mark on the shaft C When transmission is too late use 2 5mm hexagon screwdriver to loosen the hexagon screw A of feed cam T4 29 and keep screwdriver in the screw as a handle to move the cam down for adjus...
Page 8: ...ion to center by setting stitch width at 3 5 Adjustment A Open face cover B Use 2 0mm hexagon screwdriver and loosen the hexagon socket screw A 00079206 C When the distance is too close move needle bar crank 730095 forth until distance is correct D When the distance is too far move needle bar crank 730095 back until distance is correct E Hexagon socket screw A 00079206 must be tightened and secure...
Page 9: ...with shuttle hook tip as below figure shown D Check relevant position between Needle hole and rotary shuttle hook tip Adjustment A Open bottom cover B Use 2 5mm screwdriver loosen the hexagon screw A B of lower shaft gear C When shuttle hook moves exceeding needle hole position 2 5mm screwdriver can be used as a handle with screw A to move gear down until the hook tip reaches correct position with...
Page 10: ...te 730151 on needle plate C When the gap is more than 3 7mm as below standard figure shown bobbin case stop plate needs to be adjusted lower D When the gap is less than 3 7mm as below standard figure shown bobbin case stop plate needs to be adjusted upper E Tighten screw A of bobbin case stop plate and install needle plate and bobbin case back F Check bobbin case has 1mm gap with stop shrapnel hol...
Page 11: ...er bar C Threading the thread with tension meter D Lower presser bar E Pull the thread with the meter for measuring Adjustment A Open front cover B When tension is too tight More than 40g at level 4 turn tension regulator A down manually until standard tension value C When tension is too loose less than 35g at level 4 turn tension regulator A up manually until standard tension value ...
Page 12: ... B Threading with meter to check see figure Adjustment A When tension is too tight use small flathead screwdriver to turn the regulating screw A counter clockwise until standard tension value B When tension is too loose use small flathead screwdriver to turn the regulating screw A clockwise until standard tension value C Install needle plate and bobbin case when regulating is finished ...
Page 13: ...e cover B Use 1 5mm hexagon screwdriver to loosen hexagon screw A of through thread location plate 270017003 and keep screwdriver in the hexagon screw hole C When the hook of threader is lower than needle eye hexagon screwdriver is used to move up the location plate until correct position D When the hook of threader is higher than needle eye hexagon screwdriver is used to presser down the location...
Page 14: ...GHE 1207 Service Manual 14 12 Open External Covers A Face cover front cover rear cover B Start to open face cover first before opening front cover and rear cover ...
Page 15: ...d or Stepping Motors 128082 Problem 2 Pattern is sewn differently from standard The pattern is shown different from standard after sewing as below similar situation Ex 1 Pattern No 082 is sewn as left standard diagram When is wider a Use Philip screwdriver to loosen screw A b Adjust screw B by count clockwise c Tighten screw A before test d Secure screw A well if sewing test is ok When is closer a...
Page 16: ... LED display cannot be lightened control button has no response Solution Change Display control board PC2 11K23 Problem 3 LED lamp and LED display cannot be lightened in the same time Check The power plug is connected completed well and Power switch is turned On the a hi e does t ha e respo se Solution Change Power circuit board PC1 5K02P ...
Page 17: ...555QE Service Manual 17 ...
Page 18: ...ng 1 Place feeding regulating gear FA 057 to grip motor gear C168 003 together and count 5th teeth starting from position of starting pole when motor gear is moved to touch against starting pole and grip 2 teeth of the feeding regulating gear FA 057 then secure the hexagon socket screw C of motor gear 4 Make sure the feeding regulating unit is secured on the Arm bed with 4 screws C Check 1 Switch ...
Page 19: ...ect buttonhole pattern 2 Pull do utto hole le er hile the sig of le er does t flash o the LED display 3 Start to sew complete buttonhole Problem 2 The shape of buttonhole is sew like this situation is BH switch is backward too far Solution Loosen the screw of buttonhole switch case 128024 then adjust and move the switch case forward tighten screw and test Check Select buttonhole pattern 2 Pull dow...
Page 20: ...e a hi e does t ru properly Solution 1 Loosen screw A for releasing the bracket of motor 2 Bracket of motor can be moved downward or Upward until belt is in proper tension 3 After adjusting tension hold the position of motor and use Philip screwdriver to tighten screw A for securing bracket of motor ...
