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低電圧電源（LVPS）- トラブルシューティングガイド - NGC

Last updated: 04/25/2025

IPFDM PCB - Troubleshooting Guide - NGC

Introduction

Machines with a 19 in LCD control will have a iPFDM PCB. 

The iPFDM will be located on standoffs on top of the Main Processor PCB.

Overview

The iPFDM PCB will provide backup +12V, -12V, and +5V to the Main Processor in case of a power loss. The backup power will be sustained for at least ten seconds and block the user from attempting to turn on the machine for at least ten seconds.

  •  J3 is the power output connector to the PCB Fan.
  •  J2 is the power output connector where +5VDC and +/- 12VDC and a voltage monitor signal is delivered to the Main Processor PCB.
  •  J6 is the input - PSUP and CONTACTOR
  •  J4 is the output connector to the LCD PCB.
  •  J1 is the power input connector from the LVPS.
  •  J5 is the input connector for the Battery.

PCB serial number

The serial number [1] will start with two letters, followed by eight digits.

Electrical Safety

 Caution: When you do maintenance or repair on CNC machines and their components, you must always follow basic safety precautions. This decreases the risk of injury and mechanical damage.

  • Set the main circuit breaker to the [OFF] position.

 Danger: Before beginning any work inside the control cabinet the High Voltage indicator light on the 320V Power Supply / Vector Drive must have been off for at least 5 minutes.

Some service procedures can be dangerous or life-threatening. DO NOT attempt a procedure that you do not fully understand. If you have any doubts about doing a procedure contact your Haas Factory Outlet (HFO) and schedule a service visit.

Nominal Operation Status

Parts Status Corrective Action
LED D10 Green This is normal condition when the machine is booted.
LED D13-D16 Green
Fan Spinning

iPFDM Troubleshooting

 Note: Orient the iPFDM PCB so that the fan is blowing towards you for better access while troubleshooting. If this is not possible, a mirror can be used to assist while troubleshooting. 

 Note: The plastic cover does not need to be removed to see the LED's as they are located along the edges of the PCB. 

  1. Verify all cables on the iPFDM PCB have been properly connected.
  2. Verify Nominal Operation Status. See table above.
  3. Look at the status LED lights. Refer to the LED table below.
  4. Verify battery voltage. See PCB Battery Inspection section below.

LED Table

 Note: Be careful when measuring the battery voltage, it can be shorted easily. 

LED# Status Corrective Action
D10 Green This is normal condition when the machine is booted.
D13-D16 Green
D16 Off Verify the cable at J1 is properly connected and not reverse polarized. 
D1 Blinking Red Check the cable connection at J5. Check the battery voltage of at least 6.1V. See PCB Battery Inspection section below.  If the battery voltage is lower, boot the machine and leave it idle for 30 minutes. Check the voltage again. If the problem persists, replace the battery.
D22 Red Check the battery voltage of at least 6.1V. See PCB Battery Inspection section below.  If the battery voltage is lower, boot the machine and leave it idle for at least 15 minutes. Check the battery voltage again.
D21 Red Check the battery voltage of at most 8.2V. See PCB Battery Inspection section below.  If the battery voltage is higher, replace the battery and try again.

Symptom Table

Symptom / Alarm Possible Cause Corrective Action
Fan not spinning and LED D16 is off Issue with incoming power from J1 Verify the cable at J1 is properly connected and not reverse polarized. 
Machine cannot sustain a ten second boot blockage and LED D1 is blinking red Bad cable connection Verify cable connected to J5 is secure.
Incorrect battery voltage Check the battery voltage of at least 6.1V. See PCB Battery Inspection section below.  If the battery voltage is lower, boot the machine, leave it idle for 30 minutes, and try again. Check the voltage again. If the problem persists, replace the battery.
BATT_LO D22 is red Incorrect battery voltage Check the battery voltage of at least 6.1V. See PCB Battery Inspection section below.  If the battery voltage is lower, boot the machine, leave it idle for at least 15 minutes, and try again.
BATT_HI D21 is red Incorrect battery voltage Check the battery voltage of at most 8.2V. See PCB Battery Inspection section below. If the battery voltage is higher, replace the battery and try again. 
Machine does not show nominal signs of operation Bad cable connection Check the cable connection at J6 on the iPFDM, P20 on the PSUP and to the auxiliary/coil cable.

PCB Battery Inspection

 Note: Be careful when measuring the battery voltage, it can be shorted easily. 

Use a multimeter to test the voltage of the battery cable connected to J5.

 Note: Test the battery independently with a multimeter to ensure that it is producing a voltage between 6.1V and 8.2V.

IPFDM PCB - Electrical Diagrams

           

19 in LCD iPFDM Detail Diagram

           

19 in LCD Maincon PCB (J3) to iPFDM to PSUP PCB (P20) Detail Diagram