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.)
7
5
-8
8
7
5
7
6
7
7
7
8
7
9
80
81
8
2
8
3
8
4
8
5
8
6
8
7
8
8
8
9
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, i
mproved 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.
0
5/29/18
: 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.
