handi quilter HQ Stitch 710 Manuale utente
Service Manual
05/29/18
HQ Stitch 710
Top Cover Removal (pages 2 and 3, HQ Stitch Technical Bulletin #0001)
Machine Base Plate and Base Cover Removal Bed Cover Removal
Belt Cover Removal
Front Panel Removal
Free Arm Cover Removal
Lubrication
Feed Dog Height
Presser Bar Height and Radial Angle
Needle Position (Front-to-Back)
Needle Position (Left-to-Right)
Needle-to-Feed Timing Theory , Check and Adjustment
Needle Bar Height
Needle-to-Hook Clearance
Hook Gear Backlash
Needle-to-Hook Timing
Needle Threader Plate
Upper Feed Dog Timing (Part 1)
Upper Feed Dog Timing (Part 2)
Needle Plate Micro switch
Thread Tension Unit Adjustments
Automatic Thread Cutter Removal, Adjustments, and Installation
Stretch Stitch Feed Balance
Parts of the Front Panel
Printed Circuit Board ‘A’ Removal
Printed ‘A’ Circuit Board Diagram
Touch Panel Replacement
DC Motor Removal and Installation
Switching Power Supply Removal and Installation
Free Arm Cover Installation
Front Panel Installation
Bed Cover Installation
Belt Cover Installation
Machine Base Plate and Base Cover Installation
Top Cover Installation
Touch Screen Calibration
1-4
5
6
7
8-10
11-12
13-28
29-31
32
33
34
35 and 36-37
38-39
40-41
42
43-44
45
46-48
49
50
51
52-55
56-57
58
59
60
61-62
63
64-65
66
67-68
69
70
71
72
73-74
Table of Contents
Diagnostic Tests 01 -14:
•Test 01: Function of LCD, Buzzer, and LEDs
• Test 02: Key (Button)
• Test 03: BH (Button Hole Sensor)
• Test 04: BO (Bobbin Winder Sensor)
• Test 05: Presser Foot Lifter Switch
• Test 06: PH (Phase or Lower Shaft Shield Positioning Sensor)
•Test 07: STM (Zig Zag Step Motor and Feed Motor)
• Test 08: FC (Foot Control)
• Test 09: Slide Volume
•Test 10: DC (Motor)
• Test 11: SO (Thread Tension Release Solenoid)
• Test 12: Cut (Thread Cutter Motor, Cutter Solenoid)
• Test 13: Feed Dog
• Test 14: PS (Needle Plate Sensor)
Appendix II: Diagnostic Tests
Supplement: Mechanical Adjustments (This supplement covers the same
information contained in this service manual. Use it as necessary for further
clarification about making adjustments to the HQ Stitch
710.)
75-88
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
Table of Contents (cont.)
Edit Notes:
11/03/16: page 47, #1: added note that tool blade is 2.5mm and can be used as
gauge. 11/03/16: page 49, added circled around gap on black tension release.
11/04/16: page 44, clarified steps with letters a - g.
11/04/16: page 47, improved picture #1.
11/09/16: page 56, see page 8 note added .
11/09/16: page 73, corrected from "Factory Adjust" to "- - - -" as seen on screen.
11/09/16: page 76, circled correct small black screw instead of large silver screw.
11/09/16: page 76, removed erroneous BH and corrected wording to symbol.
11/09/16: page 86, clarified wording on step 1 and 2.
02/16/17: updated warning notes on cutter and pretensioner screw on page one
and added Technical Bulletin #1 as pages 2 and 3.
05/29/18: corrected information on page 35, check #2, to: ...the feed dogs will
be at their highest position again as the needle reaches its highest position. The
feed dogs should be down when the needle is down and up when the needle is
up.
Top Cover Removal (1 of 2)
1. Put the handle down and lift up the top
cover lid. Locate the large Phillip’s screw
directly behind and to the left of the bobbin
winder and the screw directly under the
horizontal spool pin. Remove the screws
completely and lay them inside the cover.
2. Remove the bobbin cutter from the bobbin
winder post. Important note: use a small
flat screw driver or L shaped hex tool to pry
up on the center underside of the cutter.
Do not pull up on one outer edge with your
finger or screw driver because this will
break off the outside edges of the cutter!
1
3. Important Note: Do not try to remove
this screw! It adjusts the height of the
pre-tension so the bobbin will wind
evenly. When the screw is screwed in or
out it also changes the pre-tension on the
bobbin. The screw has a nut on the back
side. It was set in the factory and should
be correct unless someone has
inadvertently changed it; e.g. tried to
loosen it to remove the top cover. See
HQ Stitch Technical Bulletin #0001:
HQ Stitch 710 Pre-Tension Information,
Preventing Bobbin Winding and Sewing
Issues.
2
HQ Stch
Technical Bullen #0001
02/16/17
This bullen is provided to give HQ Stch technicians
and salespeople addional informaon on the HQ
Stch 710 pre-tension assemblies. The goal is to
increase understanding of the pre-tensions to help
prevent poor bobbin winding and sewing results due
to improper threading of the pre-tension assemblies.
Back Ground Information:
The HQ Stch 710 has two pre-tensions. Both are
used for bobbin winding. Only the front pre-tension
is used for sewing. If the machine is not threaded
properly the bobbin winder will not wind bobbins
rmly and the machine will not sew properly. Also
if someone improperly adjusts the bobbin winder
pre-tension assembly it will cause sewing and tension
issues.
Make sure to pull the thread to the front unl it
clicks into the rst sewing pre-tension and then back
around the le thread guide to the bobbin winding
pres-tension. Use both hands to pull the thread
rmly into the pre-tensions as shown in the winding
the bobbin secon of the user Instrucon Book.
You should feel a good pre-tension on the thread
when winding a bobbin or the machine is either not
threaded correctly or the pre-tension has been mal
adjusted by someone, perhaps inadvertently.
In the following picture the machine is threaded for
bobbin winding with the covers removed to show the
thread path clearly. It is important to note that the
thread is going through both the back bobbin winder
pre-tension and the front sewing pre-tension.
HQ Stch 710 Pre-Tension Informaon
Prevenng Bobbin Winding and Sewing Issues
The HQ Stch 710 machine comes with the bobbin
winder pre-tension set from the factory to wind
a bobbin rmly and evenly from top to boom.
Should one mistake the pre-tension assembly
screw as a top cover fastening screw and ghten or
loosen the screw, this may render the pre-tension
ineecve and cause poor sewing results.
When one mistakenly adjusts the pre-tensioner
assembly screw it will not only eect how evenly the
bobbin winds, but also how rmly the bobbin winds.
3
The height of the pre-tension assembly determines
how evenly the bobbin winds top to boom. When
the screw is ghtened or loosened too much it also
causes the pre-tensioner assembly to release the
thread while winding a bobbin. With no pre-tension
on the bobbin it will wind too loose or spongy. Loose
bobbins cause signicant sewing and tension issues.
The small screw below right controls the bobbin ll
stopper. If one changes the stopper to the le it
will make the bobbin stop winding sooner, lling the
bobbin less. If it is moved to the right it will allow the
bobbin to winder later lling the bobbin more. This
might be inadvertently changed by someone when
trying to remove the top cover.
With the machine top cover removed one can see
the pre-tensioner screw lock nut. It should have
about two metal threads showing above the nut as
shown in the image below.
Visual Checks:
By looking at the pre-tension screw one can see if
the screw has been adjusted in/clockwise and is low
in the lile cover over the bobbin winder pre-tension
or out/counterclockwise to be high and pung
pressure up on the cover.
In the correct posion the screw head will be slightly
under the cover and not touching the boom surface
of the cover. It will also not be deep in the hole with
a big gap between the screw head and the cover.
The image below shows the relave posion of the
bobbin winder pre-tension assembly screw. It is just
below the cover, so the cover is not resng on it,
but not too far below. If your screw looks dierent
someone may have inadvertently adjusted it.
The image below shows the bobbin winder pre-
tension without the covers. Under the head of the
screw there is a small spring, the two metal pre-
tensioner plates and an e-clip. The e-clip suspends
the pre-tensioner assembly above the plasc top
cover surface.
Top Cover Removal (2 of 2)
3. Close the lid and lift
up the handle.
Remove the small Phillips
screw on the left, needle
end of the machine.
4. With the handle up, start
to lift up on the left side of
the top cover. As you lift
up be careful of the clips
that hold the top cover
firmly to the front panel
(see three clips circled in
red). Continue to lift up
and using your other hand
push the left of the cover
back through the handle
towards the rear of the
machine.
4
Machine Base Plate and Base Cover Removal
1. Slide the accessory box off of the machine
by pulling it to the left.
2. Gently lay the machine on its back. Locate
the four screws on the base plate. Remove
them completely and pull the plate off toward
you. (Note: the screws on the left are self
tapping screws with coarse threads going into
plastic. The screws on the right are machines
screws with fine threads going into metal)
3. Remove the four self tapping screws with
coarse threads going into plastic that hold the
machine base plate. To remove the plate
without scratching it on the table, lift the end of
the machine up off the table by grabbing the
free arm before sliding off the baseplate.
5
Bed Cover Removal
1. Locate the two screws that hold the bed
cover to the machine. Remove these two set
screws.(Machine screws with fine threads)
2. First pull down on the end of the cover and
second very gently start to slide the bed cover
to the left. Be careful how you pull it because
there are wires underneath and you do not
want to scratch or cut them.
6
1
2
Belt Cover Removal
1. Loosen the two washer screws a couple
turns that hold the belt cover to the casting
on the bottom hand wheel side of the machine.
2. Carefully lift the machine back
upright. Lift up on the handle and
loosen the small washer screw a couple
turns directly under the handle on the
right side.
3. Remove the Phillips screw directly
under the hand wheel.
4. Carefully start to pull on the back of
the belt cover to release the clips that
hold it to the rear cover. As you start to
release it from the top, work your way
down to release the other four clips.
7
Indice
Altri manuali handi quilter Macchina da cucire
handi quilter
handi quilter HQ Capri 18 Manuale utente
handi quilter
handi quilter HQ STITCH 510 Manuale utente
handi quilter
handi quilter Pro-Stitcher QM30010-2 Manuale utente
handi quilter
handi quilter HQ Sweet Sixteen Manuale utente
handi quilter
handi quilter HQ Amara 20 Manuale utente
handi quilter
handi quilter HQ Amara 20 Manuale utente
handi quilter
handi quilter HQ Sweet Sixteen QM30270 Manuale utente
handi quilter
handi quilter HQ Sweet Sixteen Manuale di programmazione
handi quilter
handi quilter HQ Sweet Sixteen Manuale utente
handi quilter
handi quilter Avante QM30239 Manuale utente
handi quilter
handi quilter QM30269 Manuale utente
handi quilter
handi quilter Infinity 26 Manuale utente
handi quilter
handi quilter HQ Amara 20 Guida di riferimento
handi quilter
handi quilter HQ Sweet Sixteen Manuale utente
handi quilter
handi quilter Simply Sixteen Manuale utente
handi quilter
handi quilter Fusion QM32469 Manuale utente
handi quilter
handi quilter Infinity 26 QM33001 Manuale utente
handi quilter
handi quilter HQ Little Foot Frame Manuale utente
handi quilter
handi quilter HQ Pro-Stitcher Manuale utente
handi quilter
handi quilter HQSixteen Manuale utente
