Select Your Printer Model
(Default: K-605B DTF Printer)
Choose your model from the drop-down menu below.


LINKO Motherboard Replacement and Wiring Guide

Applicable Model: LINKO K605BA602KM-602BY603Y402 UV DTF Printer

Step 1. Preparation Before Starting

1.1 Activate the emergency stop switch: Press the emergency stop switch to stop the printer (See Figure 1.1).

1.1 Turn off the power switch: Release the power switch to cut off the machine circuit. (See Figure 1.1)

1.2 Safety Warning: Always turn off the power and unplug the power cable before any operation.

Failure to do so may cause electric shock or permanent damage to the mainboard.

1.3 Tip: Use your phone to take clear photos of the original mainboard wiring. These photos will help you reconnect the cables correctly later.

Step 2. Remove the Old Mainboard

2.1 Mainboard Wiring Diagram.

No. Interface Cable ID Description Cable Type
① Power Input – Main 24V power input Red-Black-Yellow Cable
② Moisturizing Output MOISTURIZING LINE Controls moisturizing pump or valve (DO Output) Yellow-Red Signal Cable
③ Ink Pump Signal INK PUMP LINE Controls ink pump ON/OFF (DO Output) Black-Yellow Signal Cable
④ Capping Motor (Z-axis Control) – Controls capping lift motor (Z-axis output) Blue-Red-Black-Green Multi-core Cable
⑤ Keypad / USB Control – Keypad communication port USB Cable
⑥ Optical Fiber (SFP Port) – Main data communication (connects mainboard and carriage board) SFP Fiber Cable
⑦ Paper-Out Sensor (XIN0.4) J501 PAPER SHORTAGE SENSOR Detects paper-out status (input signal) Signal Cable
⑧ Anti-Collision Sensor (XIN0.3) HEAD ANTI-COLLISION SENSOR Detects printhead collision (input signal) Signal Cable
⑨ Capping Origin (XIN0.1) J502 WIPER MOTDR Detects capping home position (input signal) Signal Cable
⑩ X-axis Origin (XIN0.0) X-AXIS ORIGIN SENSOR Detects carriage home position (input signal) Signal Cable
⑪ X-axis Motor Signal X-AXIS SIGNAL Controls X-axis servo motor (pulse + direction) Multi-core Cable
⑫ Y-axis Motor Signal Y-AXIS SIGNAL Controls Y-axis servo motor (pulse + direction) Multi-core Cable
⑬ PC USB 3.0 – Communication with computer USB 3.0 Cable
No. Interface Cable ID Description Cable Type
① Y-axis Motor Signal – Controls Y-axis servo motor (pulse + direction) Signal Cable
② Capping Motor (Z-axis Control) INK STACK MOTORS Controls capping lift motor (Z-axis output) Multi-core Cable
③ X-axis Origin X-AXIS ORIGIN SENSOR Detects carriage home position (input signal) Signal Cable
④ Capping Station Sensor INK STATION SENSOR Detect ink stack status (input signal) Signal Cable
⑤ Paper-Out Sensor – Detects paper-out status (input signal) Signal Cable
⑥ Anti-Collision Sensor Anti-collision Signal Detects printhead collision (input signal) Signal Cable
⑦ Mainboard Signal Output MAIN BOARD SIGNAL OUTPUT Send Control Commands to External Devices (Output Signal) Signal Cable
⑧ Power Input – Main 24V power input Power Cable
⑨ Ink Pump Signal Ink Pump Controls ink pump ON/OFF (DO Output) Signal Cable
⑩ Moisturizing Output MOISTURE J900-24V Outpt Controls moisturizing pump or valve (DO Output) Yellow-Red Signal Cable
⑪ Keypad / USB Control PM200 ZHTO Keypad communication port USB Cable
⑫ Optical Fiber (SFP Port) – Main data communication (connects mainboard and carriage board) SFP Fiber Cable
⑬ X-axis Motor Signal X-AXIS SIGNAL Controls X-axis servo motor (pulse + direction) Signal Cable
No. Interface Cable ID Description Cable Type
① Ink Pump Signal – Controls ink pump ON/OFF (DO Output) Signal Cable
② Paper-Out Sensor – Detects paper-out status (input signal) Signal Cable
③ X-axis Origin – Detects carriage home position (input signal) Signal Cable
④ Keypad Control – Keypad communication port Screen cable
⑤ Capping Origin – Detects capping home position (input signal) Signal Cable
⑥ Capping Motor (Z-axis Control) – Controls capping lift motor (Z-axis output) Signal Cable
⑦ Power Input – Main 24V power input Power Cable
⑧ X-axis Motor Signal DIRX+ DIRX-PULX+ PULX- Controls X-axis servo motor (pulse + direction) Signal Cable
⑨ Y-axis Motor Signal DIRX+ DIRX-PULX+ PULX- Controls Y-axis servo motor (pulse + direction) Signal Cable
⑩ Optical Fiber (SFP Port) – Main data communication Port In (connects mainboard and carriage board) SFP Fiber Cable
⑪ Optical Fiber (SFP Port) – Main data communication Port Out (connects mainboard and carriage board) SFP Fiber Cable
⑫ PC USB 3.0 – Communication with computer USB Cable
No. Interface Cable ID Description Cable Type
① Ink Pump Signal – Controls ink pump ON/OFF (DO Output) Signal Cable
② Paper-Out Sensor – Detects paper-out status (input signal) Signal Cable
③ X-axis Origin X-AXIS ORIGIN SENSOR Detects carriage home position (input signal) Signal Cable
④ Keypad Control – Keypad communication port Screen cable
⑤ Capping Origin – Detects capping home position (input signal) Signal Cable
⑥ Capping Motor (Z-axis Control) – Controls capping lift motor (Z-axis output) Signal Cable
⑦ Power Input 42V, 24V Main 24V and 42V power input Power Cable
⑧ X-axis Motor Signal X-AXIS SIGNAL Controls X-axis servo motor (pulse + direction) Signal Cable
⑨ Y-axis Motor Signal – Controls Y-axis servo motor (pulse + direction) Signal Cable
⑩ Ground Wire –    
⑪ Optical Fiber (SFP Port) – Main data communication Port In (connects mainboard and carriage board) SFP Fiber Cable
⑫ Optical Fiber (SFP Port) – Main data communication Port Out (connects mainboard and carriage board) SFP Fiber Cable
⑬ PC USB 3.0 – Communication with the computer USB Cable
No. Interface Cable ID Description Cable Type
① Ink Pump Signal – Controls ink pump ON/OFF (DO Output) Signal Cable
② Optical Fiber (SFP Port) – Main data communication Port In (connects mainboard and carriage board) SFP Fiber Cable
③ Paper-Out Sensor – Detects paper-out status (input signal) Signal Cable
④ X-axis Origin X-AXIS ORIGIN SENSOR Detects carriage home position (input signal) Signal Cable
⑤ Keypad Control – Keypad communication port Screen cable
⑥ Capping Origin – Detects capping home position (input signal) Signal Cable
⑦ Capping Motor (Z-axis Control) – Controls capping lift motor (Z-axis output) Signal Cable
⑧ Power Input 42V, 24V Main 24V and 42V power input Power Cable
⑨ X-axis Motor Signal X-AXIS SIGNAL Controls X-axis servo motor (pulse + direction) Signal Cable
⑩ Y-axis Motor Signal – Controls Y-axis servo motor (pulse + direction) Signal Cable
⑪ Ground Wire –    
⑫ PC USB 3.0 – Communication with the computer USB Cable

2.2 Disconnect Cables: Unplug cables ①–⑩①–⑨①–⑬①–⑨ one by one (See Figure 2.1-1).

2.3 Remove X/Y Axis Signal Screws: Unscrew the connectors for ⑪–⑫ (See Figure 2.3).

2.3 Remove Mainboard Screws: Unscrew the four mainboard corner screws. (See Figure 2.3)

2.3 Remove Mainboard Screws and cable ⑩ : Unscrew the four mainboard corner screws，and unplug the cable secured by the screw at the lower-right corner. (See Figure 2.3)

2.4 Unplug cables ⑪-⑬one by one, remove the old Mainboard and store in an anti-static bag. (See Figure 2.1-1/2.4)

the Mainboard

2.4-the-Mainboard

2.4 Remove the old main board, and place it in an anti-static bag for storage. (See Figure 2.4-1/2.4-2)

2.4 Unplug cables ⑩-⑫ one by one, remove the old Mainboard and store in an anti-static bag. (See Figure 2.1-1/2.4)

2.4 Remove Mainboard Screws: Unscrew the four mainboard corner screws (See Figure 2.4).

2.5 Remove the Old Mainboard: Unplug the USB cable (See Figure 2.5-1) and store the old mainboard in an anti-static bag (See Figure 2.5-2).

2.3 Remove Mainboard Screws and cable ⑪: Unscrew the four mainboard corner screws, and unplug the cable secured by the screw at the lower-right corner. (See Figure 2.3)

Mainboard Screws

2.3-Mainboard-Screws

2.4 Unplug cables ⑫, remove the old Mainboard, and store it in an anti-static bag. (See Figure 2.1-1/2.4)

the Mainboard

2.4-the-Mainboard