SERVICE MANUAL FOR HOMELOCK MODEL 929D
Contents
1. EE m x O LLL we 297 T E4216 1 EEE lt gt Jes Take off the rear cover Loosen the three set screws and take off the insulation sheet and insulation cover Take off the front cover Loosen the six set screws and take off the key PC board 18 15 Message Display LCD models SELECT KEY A key MESSAGE KEY B key CONTRAST VOLUME Immediately after turning on the power Enter the initial settings for the CPU See whether the board check mode is on and if so run the board check program See whether the test mode is on and if so bring up the test mode specifications selection screen If the machine is operating in normal mode select the language depending on the E2PROM value and display the sewing style selection screen LCD Displays and Key Operations The Select Key is the A key and the Message Key is the B key These are used as described below Sewing style selection screen Immediately after turning on the power and when the A key has been pressed on the information screen the sewing style selection screen is displayed as shown below Sewing style name Selection number lt Key Operations gt A Displays the next selection number and sewing style name I2. much fabrics will not be fed correctly 10 6 Feed timing Models Left needle Two needles models Feed dog front Y Feed dog back Feed eccentric wheel Left needle Two needles models Main Differential Feed dog feed dog The standard timing of the feeding Main feed dog should be at the same level as upper surface of needle plate when needle for overlocking goes down and point of it touches upper surface of needle plate As the overlock needle is descending and about to enter the needle plate hole the feed dog must be positioned at the surface of the needle plate NOTE a Before the adjustment check the Height of the feed dog and set the Sewing pitch at 3 b Fabrics will not be fed straightly in case feed dog is inclined Open the cloth plate cover and loosen the set screws of the feed eccentric wheel by means of a hexagonal wrench Turn the wheel and adjust the timing a In case of early timing in other words when the feed dog is still positioned over the needle plate turn the wheel in direction A b In case of late timing in other words when the feed dog is already positioned under the needle plate turn the wheel in direction B Tighten the set screws well 11 7 Height of presser bar Set screw Presser bar Presser bar guide bracket How to use the gauge Needle descents ASSL Needle plate Before adjustment remove the panel assembly Then turn the
3. the timing of the lowerlooper See page 4 3 Timing of the lowerlooper Lowerlooper thread through feed Use SCHMETZ 90 Lower looper Needle guard Left needle Two needle models 2 2 2 6mm Lowerlooper Movable needle guard A Adjust the lowerlooper thread through feed and lowerlooper Loosen set screw A and align the top surface of the lowerlooper thread through feed with the top surface of the lowerlooper Firmly tighten set screw A 5 Incorrectly setting the timing causes the lowerlooper thread through feed to rub against the feed dogs causing the lowerlooper thread through feed knob to operate incorrectly B Adjust the needle and lowerlooper 1 When the needle is raised to 2 2 2 6 mm above its lowest position place the pointed end of the lowerlooper against the right side of the needle The point of the lowerlooper should be between 0 0 05 mm from the needle 3 Timing the lowerlooper C 9 0 0 05mm Lowerlooper 1 2 1 5 MM Needle guard Left needle D Lowerlooper 0 0 05 mm f Movable needle guard 2 2 2 6 mm 0 0 1mm Lowerlooper Movable needle guard Set screw Needle plate Set screw D i Fixed needle Lowerlooper lever guard Looper lever fixing screw Upper knife C Adjust the needle and the movable needle guard 1 With the needle raised to 2 2 2 6 mm above its lowest position and the point of the lowerlooper contacting the right side of t
4. 13 9 Position of thread take up 1 Lower the needle to its lowest position 2 Loosen the set screw and position the thread take up below the thread retainer by 1 0 3 0 mm Thread retainer Thread take up Set screw 10 Position of looper thread take up 1 Loosen the set screw of the thread take up 2 Position the looper thread take up and thread guide above holding the screws on the looper thread take ups at the distance shown in the illustration The position of the looper thread take up A is as follows turn the pulley and align the over looper at the far left Loosen the set screw and align the right side of the looper thread take up A at a position approximately 24 5 26 5 mm from the left side of the thread guide The position of the looper thread take up B is as follows turn the pulley and align the over looper at the far left Loosen the set screw and align the right side of the looper thread take up B at a position approximately 17 19 mm from the left side of the thread guide After making these adjustments tighten the set screw securely 17 19 mm 1 Looper thread take up A Looper thread take up B Set screw 24 5 26 5 2 14 11 Replacing the knives Needle plate Wp per knifa d IX Upper knife hokter 0 5 1 0 mm If the knives are blunt they will cause the fabric to pucker and uneven stitches NOTE a If one strand of thread can be cut of
5. SERVICE MANUAL FOR HOMELOCK MODEL 929D 3 1998 II CONTENTS HOW TO USE THIS MANUAL ac qamqsqiudenuemeqidemsqenisdegensqEdems 1 HOW TO ADJUST WRERERERERERRPESRERERERNPERERERERAPESRERERRRNPXSKRERERRPESERERR i Height af needle 2 3 Position of the OWerlOOper a 3 3 Timing of the lowerlooper mnn 4 4 Timing of the upperlooper 7 54 Meight of feed 9 52 Height of feed dog reete rte ttti tiis ttbi reti 40 ee 41 7 Height of presser bar 42 6 Thread tension adjustment 13 9 Position of thread take Up ementi 44 10 Position of looper thread take Up menn 14 11 Replacing the knives 45 12 Adjustment and replacement for the timing belt mnn 16 13 Changing the light bulb 47 14 How te changes the slecironio palit oec etenim t ci 18 15 Hoc
6. a differential feed dog Differential Main feed dog A Set screw Main feed dog How to use the gauge Gauge Set screw Feed dog Set screw A Adjustment for height of main feed dog 1 Open the cloth plate cover and raise needle at its highest position by turning handwheel 2 Set the sewing pitch at 3 3 Loosen set screw of vertical adjusting shaft 4 Turn vertical adjusting shaft by screw driver so that the clearance between upper surface of needle plate and point of feed dog is 0 9 1 1 mm After adjustment tighten set screw of vertical adjusting shaft securely Stitches will tend to pucker in fine fabrics or feed dog will touch needle plate in case feed dog reaches to higher position b Fabrics will not be fed sufficiently or feed dog will touch other parts like loopers in case feed dog reaches to lower position c When adjusting cut mark on vertical adjusting shaft should be to your side B Adjustment for height of differential feed dog Differential feed dog should be the same level as upper surface of needle plate when main feed dog goes down and reaches the same level as upper surface of needle plate Adjust by loosening set screw of differential feed dog NOTE a Adjust at position of 1 0 of feed ratio b Differential feed dog should not be inclined when tightening set screw of differential feed dog c In case difference between height of main feed dog and differential feed dog is too
7. ama oou ertet 19 HOW TO USE THIS MANUAL This service manual is compiled as a guide for the repair and service of Brother Homelock model 929D Almost all troubles or problems occurring on Homelock sewing machines which arise as the result of the user s lack of knowledge or experience can be solved by following instruction book It should be followed carefully because many faults are caused by misuse or carelessness We therefore recommend you to refer to the Check list for better sewing in the Instruction Book before you attempt any adjustment from this manual However if it is necessary to adjust the mechanism use this manual together with the PARTS CATALOGUE for each model Find the fault in question in the Fault finding chart and follow the corrective measures in this manual 1 Adjust each model number circled in each illustration and instruction 2 Symbols Move the part to its highest position Move the part to the extreme right Move the part to the right or left Move the part to its lowest position Move the part up or down Move the part to the extreme left HOW TO ADJUST 1 Height of needle bar Left needle Two needle models 11 3 11 9 mm Needle plat esale piaig How to use the gauge SCHMETZ 130 705H 90 e Needle descents 1 Raise the needle to its highest position 2 Loosen the screw on the needle bar 3 Position the needle ba
8. d tighten the screw Remove the spacer Raise the needle bar until the needle clamp contacts the gauge Continue making the adjustment described on the previous page The spacer is 2 4 mm thick 4 Timing of the upperlooper Left needle Two needle models Upper looper Set screw How to use the gauge Upperlooper Looper lever fixing screw OPTION Upperlooper How to use the gauge Setscrew Needle Upperlooper Looper lever fixing screw Upperlooper A Timing of the upperlooper against the needle Insert the upperlooper shaft as far as possible into the upperlooper Position the upperlooper to its extreme left position Loosen the looper lever fixing screw and position the upperlooper so that the clearance to the pointed end to the left side of the needle is 5 6 6 0 mm Tighten the screw well This clearance is for 14 needle 4 Timing of the Upperlooper o p ee Upperlooper screw Lowerlooper For two thread sewing For three and four thread sewing Lower the lever Set screw E x Raise the lever Y B Timing of the upperlooper in relation to the lowerlooper 1 Loosen the upperlooper screw 2 Adjust the upperlooper not to bend the lowerlooper when the upperlooper travels nearest to the lowerlooper NOTE a When fastening the screw after adjustment press the upperlooper slightly in order not to change the corrected position b In ca
9. ettings using the B key For detailed information on set values please refer to the appended table The character at the far right is a code indicating the type of cloth If the sewing style and the type of cloth which have been selected do not match the thread a message like that shown below is displayed instead of the set values Key Operations A key Shifts to the sewing style selection screen The selection number is the same as that displayed before shifting to the information screen B key Shifts to the set values for the next thread tension dial If the third set values are displayed however this shifts to the scrolling display 20 15 Message Display LCD models Test Mode language specification settings This test mode is used when the language specification is changed Turning on the power with the A and B keys pressed starts the test mode and displays the language number language name and ROM version as shown below Swedish ROM version Language name in that language Language number lt Key Operations gt key Increments the language specification value by 1 and returns to 1 when the maximum value is reached Holding down the key activates the auto repeat function B key Decrements the language specification value by 1 and returns to 1 when the maximum value is reached Holding down the key activates the auto repeat function Language Specification The value for t
10. f in front of or at the rear of the knife the knife is sharp enough b When the knives are blunt replace them with new ones in the manner mentioned below But be sure to disconnect the power first 1 Replacing the upper knife 1 Loosen the upper knife set screw pull up the upper knife and remove it 2 Insert the new upper knife into the upper knife holder 3 Then turn the handwheel until the upper knife is lowered 4 When the upper knife is at its lowest point the distance in the front to back direction from the top of the blade farthest forward of the lower knife should be 1 2 1 7 mm from the position farthest forward of the upper knife 5 Re tighten the upper knife well Securely tighten the upper knife set screw 2 Replacing the lower knife 1 Loosen lower knife set screw and remove lower knife 2 Attach new lower knife on lower knife holder and set position so that point of knife is the same level as upper surface of needle plate Tighten it with lower knife set screw NOTE It is important to adjust the alignment of the upper and lower knives to enable sharp cutting 15 12 Adjustment replacement for the timing belt A Presser lever Cloth plate cover Belt cover Front cover Motor cover Parallel Motor fastening bolt Timing belt Handwheel Motor handwheel A 1 Turn the upper blade dial until the upper blade is positioned so that it cannot be used then remove
11. f the last number is displayed the display returns to No 1 B key Shifts to the information screen lt Selection styles gt 4 overlock Blind stitch 3 overlock Pin tucks Rolled edge Flat lock Narrow edge Ribbon lock 19 15 Message Display LCD models 1 Information screen Pressing the B key on the sewing style selection screen displays the information screen There are two types of displays used on the information screen 1 a scrolling display showing the application and operation method for the sewing style and 2 a display showing the set values of the thread tension dial 3 screens depending on the thickness of the cloth lightweight normal or heavy The cloth thickness switches in sequence each time the B key is pressed 3 Scrolling display of sewing application and operation method Ti Ei REL OCKING AT THE Key Operations A key Shifts to the sewing style selection screen The selection number is the same as that displayed before shifting to the information screen B key Shifts to the next information screen thread tension dial set values display If the B key is pressed while the scrolling screen is displayed the set values listed above are displayed when two scrolling displays have been completed There are three types of set values depending on the thickness of the cloth The set values are switched from lightweight cloth settings to normal cloth settings to heavy cloth s
12. handwheel and raise the needle to its highest position 1 Raise the presser lever and loosen the screw securing the presser bar winding 2 To adjust the height of the presser bar raise the presser lever and at the point where the presser bar is horizontal raise or lower it until the first step is 4 8 5 0 mm above the needle plate Make sure that the presser lever does not come in contact with the upperlooper when it has been raised to the height of the first step Check also to make sure that the needle descents of the presser bar are not noticeably out of alignment with the needle slots of the needle plate After the adjustment has been completed tighten the screw securely that holds the presser bar winding in place 12 8 Thread tension adjustment For normal operation Plate Notch of dial clutch Thread tension nut Thread tension dial Tension disc opener Thread tension For adjustment disc Depress the notch _ Dial clutch Notch ad Clutch will be released Notch of Thread tension plate dial clutch 1 Set the thread tension dial to 4 on the dial scale 2 Insert a plate of approx 0 5 mm 0 02 in of thickness into the right side slot of the thread tension dial 4 position on the dial scale and depress the notch of the dial clutch Then while holding the plate turn the dial to adjust the thread e Direction A increase tension e Direction decrease tension
13. he language specification is stored in the E2PROM If no value FFh has been set in the E2PROM or if an incorrect value has been entered English 01h will be used as the default language ROM Version The last character of the display is a code indicating the ROM version For Version A For Version B p For Version C 21 9290 7120120
14. he needle check that the distance between the lowerlooper and the movable needle guard is 1 2 1 5 mm and that the distance between the needle and the movable needle guard is 0 0 1 mm 2 In order to make an adjustment loosen set screw D move the movable needle guard upward downward forward and backward to adjust it to meet the specifications described in 1 3 Firmly tighten set screw D 7 D Adjust the needle the fixed needle guard 1 Before adjustment remove the stitch tongue 2 With the needle raised to 2 2 2 6 mm above its lowest position and the point of the lower looper contacting the right side of the needle check that the distance between the needle and the fixed needle guard is 0 0 05 mm 3 In oder to make the adjustment loosen set screw Rotate the fixed needle guard and move it forward and backward then adjust it so it meets the specifications described in 1 NOTE With the needle plate installed check that the fixed needle guard does not contact the needle 4 Firmly tighten set screw NOTE Incorrectly setting the clearance between the needle and the lowerlooper movable needle guard and fixed needle guard can cause the needle to break or skip stitches 3 Timing the lowerlooper How to use the gauge How to use the gauge 1 Raise the presser bar and remove the presser foot and presser foot holder Lower the needle bar to its lowest position Position the spacer and gauge an
15. r so that the clearance between the point of the needle and the surface of the needle plate is as follows 11 3 11 9 mm NOTE When making this adjustment keep the needle bar at its highest position by holding the handwheel The long groove of the needle should face toward you PARTS CODE FOR GAUGE X77402001 2 Position of the lowerlooper Clearance between point of lowerlooper and upper surface of needle plate should be between 2 0 2 4 mm when height of lowerlooper is at its highest position or when distance between point of lowerlooper and center of left hand needle is 12 5 mm Left needle Two needle models M How to use the gauge WSZZSSSFSFEFZT Set screw Looper lever Lowerlooper Position of the lowerlooper fixing screw 1 Before adjusting the timing position the looper correctly 2 Too much adjustment will cause damage to other parts or cause the needle to skip stitches How to use the gauge 1 Temporarily attach the lowerlooper to the lowerlooper lever Turn the handwheel to position the point of the lowerlooper as far as possible to the left Remove the presser foot assembly Position the gauge as shown in the illustration Turn the handwheel until the point of the lowerlooper contacts the end of the gauge as shown Remove the gauge turn the handwheel to expose the set screw and firmly tighten the screw Finally reposition the gauge and check the final position of the lowerlooper Adjust
16. se of bad timing the upperlooper and the lowerlooper cross each other and do not work correctly which will cause skipped stitches and loose tension C Setting the upperlooper lever to match the type of sewing selected 1 For two thread sewing lower the lever on top of the upperlooper as shown in the illustration 1 The lever should fit securely into the groove on top of the upperlooper after it has been moved lowered 2 The lever should be returned to its original position after sewing is completed 5 1 Height feed dog Normal model without differential feed dog Feed bar How to use the gauge 5555 Feed dog Set screws 2 Open the cloth plate and raise the feed dog to its highest position Set the sewing pitch at 3 Loosen the set screw of the vertical adjusting shaft Turn the vertical adjusting shaft by the driver so that the clearance between the surface of the needle plate and the upper surface of the feed dog is to 0 9 1 1 mm at the center 5 After the adjustment tighten the set screw of the vertical adjusting shaft well NOTE a Stitches tend to pucker in fine fabrics or the feed dog will touch the needle plate as the feed dog reaches a higher position The fabric will not be fed sufficiently or the feed dog will touch other parts like the looper as the feed dog reaches a lower position When adjusting the cut mark should be to your side 5 2 Height of feed dog with
17. the cloth plate cover 2 Remove the presser lever 3 Slide the belt cover downward to remove it 4 Remove the motor cover B 5 Adjust the belt tension by moving the motor fastening bolt right and left so that the belt can be pushed down 5 0 6 0 mm when applying a pressure of 500g NOTE a When the belt is worn replace it in the same manner b The motor holder and the oil pan should be parallel 6 After adjustment assemble the machine in the reverse order 46 13 Changing the light bulb Light bulb Lamp cover Light bulb cover Caution Always be sure to turn off the power before carrying out the following operation Changing the light bulb e Remove the lamp cover as shown in the illustration e Loosen the light bulb cover set screw pull up the light bulb cover and remove it e Take out the light bulb abd replace it with a new one 17 14 How to change the electronic parts LCD models WT SE Front cover Pu 1 y XTALI 3 RAT zE m D S ic 1002 08 ae 5 6 D 12 Oo LRES qq 04 O D ali 418 7 D
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