Jack JK-T781E User Manual

JK-T781E series

Jack JK-T781E Specifications

General

Brand	Jack
Model	JK-T781E
Category	Sewing Machine
Language	English

Summary

Machine Technical Parameters and Models

Adjust Needle and Hook (1.2)

Adjust Needle Bar Height (2.1)

Adjust Needle and Hook Timing (2.2)

Adjust Buttonhole Width and Stitch Position (3.0)

Adjust Feeding Control Panel Position (4.0)

Adjust Button Hole Length (18.0)

Adjust Lower Line Fixed Knife Position (19.0)

Adjust Automatic Foot-Lift Sensor Chip (29.0)

Adjust Feeding Sensor and Functions (31.0)

Parameters and Fault Codes

1、Operation Button Functions

Explains operation buttons (ENTER, F, arrows) for parameter navigation and saving.

2、LED Display Script Comparison

Compares digital script values with their LCD display representations.

3、LCD Screen Display Modes

Illustrates how English alphabet characters are displayed on the LCD screen.

4、Factory Reset Procedure

Procedure for performing a factory reset, detailing required key presses.

5、User Mode Parameter Modification

Steps to enter user mode, modify parameters, and save changes.

6、Technician Mode Access

Instructions for accessing and modifying technician-level parameters.

7、System Officer Mode Access

Details for accessing system officer mode and modifying specific parameters.

8、Manual Up Positioning Adjustment

Guide to manually adjust up positioning using the handwheel and saving the setting.

9、User Parameters (P01-P10)

Details user-configurable parameters P01-P10, including ranges, initial values, and notes.

User Parameters (P16-P29)

Details user-configurable parameters P16-P29, including ranges, initial values, and notes.

11、Error Code Troubleshooting (E1-E11)

Lists common error codes E1-E11 and their corresponding troubleshooting solutions.

12、Error Code Troubleshooting (E12-E19)

Lists common error codes E12-E19 and their corresponding troubleshooting solutions.