Table Of Contents - JUKI HZL-F series Service Manual

[ 1] Specifications of HZL-F Series ............................................................. 1
[ 2] Principal parts ........................................................................................ 3
[ 3] Disassembling the machine covers ..................................................... 4
[ 4] PCB connection diagram ...................................................................... 8
[ 5] Adjustment ........................................................................................... 10
5-1 Adjusting the needle bar height ...................................................................... 10
5-2 Adjusting the needle entry point ..................................................................... 11
5-3 Feed dog height ................................................................................................ 11
5-4 Timing belt ........................................................................................................ 12
5-5 Feed timing ....................................................................................................... 12
5-6 Timing between the needle and the hook ....................................................... 13
5-7 Clearance between the needle and the blade point of hook ......................... 14
5-8 Position of the hook rotation stopper plate .................................................... 15
5-9 Adjusting the bobbin thread tension .............................................................. 15
5-10 Adjusting the disk opening amount .............................................................. 16
5-10-1 Adjusting the tension release adjusting plate ................................... 16
5-10-2 Pretension disk opening amount ....................................................... 16
5-10-3 Tension disk opening amount ............................................................ 17
5-10-4 Base tension opening amount ............................................................ 17
5-10-5 Adjusting the disk opening amount at the time of thread trimming . 18
5-11 Adjusting the needle thread tension ............................................................. 18
5-12 Vertical position of the needle threading hook ............................................ 19
5-13 Adjusting the auxiliary hook height .............................................................. 20
5-14 Adjusting the opening amount of auxiliary hook ......................................... 21
5-15 Adjusting the presser foot lifting switch ...................................................... 21
5-16 Adjusting the presser bar height .................................................................. 22
5-17 Motor belt ........................................................................................................ 22
5-18 Automatic thread trimming ........................................................................... 23
5-19 Longitudinal feed ........................................................................................... 24
5-20 Service mode ................................................................................................. 25
5-20-1 Service mode screen ..........
5-20-2 Service-mode items and descriptions ....
CauTIOn:
Be sure to observe the following to protect against a fire, electrical shock, injury or damaged
components.
* Be sure to unplug the machine before disassembly, assembly or adjustment of the machine.
* Be sure to carefully prevent electric cords from being caught, coated surfaces from being
damaged as well as wrong wiring during assembly.
* Be sure to use the proper genuine parts when changing any of the machine parts.
COnTEnTS
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