Comen STAR8000C patient monitor Power Management Board to Keypad Wiring 009-000291-00_A

Comen STAR8000C patient monitor Power Management Board to Keypad Wiring 009-000291-00_A

Product Introduction

The Comen STAR8000C power management board to keyboard harness (part number: 009-000291-00_A) is a dedicated internal cable assembly designed specifically for the Comen STAR8000C multi-parameter patient monitor. It serves as the electrical and signal connection between the monitor's power management board and the front panel keyboard (button panel). This harness is responsible for: transmitting stable operating power from the power management board to the keyboard's indicator lights and buttons, and transmitting user command signals (such as parameter adjustments, alarm mute, and mode switching) back to the main processor.

Function:

1. Provides Reliable Power to the Front Panel Keyboard

The wiring harness transmits a stable DC voltage from the power management board to the keyboard's LED indicators and keys. High-purity OFHC conductors ensure low resistance loss and clean power delivery, eliminating voltage drops that could cause keyboard LED flickering or intermittent key presses.

2. Transmits User Commands

A bidirectional signal line instantly transmits key commands (including parameter adjustments, alarm mute, menu navigation, and mode switching) from the keyboard to the power management board and ultimately to the main processor. This low-latency design ensures that clinicians' inputs can be executed immediately, which is crucial for timely adjustments during patient monitoring.

Notice

1. Disconnect all power before maintenance. Before turning on the monitor, always turn it off, disconnect the AC power cord, and remove the internal battery. After disconnecting power, wait at least 30 seconds before handling any internal wiring.

2. Take electrostatic discharge (ESD) protection measures. While the wiring harness itself is not an ESD-sensitive component, connectors and circuit board sockets are. Operate on an anti-static workstation and wear a grounded anti-static wrist strap to prevent damage to the power management board or keyboard.

3. The 009-000291-00_A is a custom cable assembly engineered specifically for the STAR8000C. Third‑party or salvaged harnesses from other models may have incorrect pinouts, wrong connector sizes, or improper current ratings, leading to erratic keypad behavior or short circuits.

Reassembly and Testing

• Carefully close the front and rear housing, ensuring no cables are pinched between the shells. Secure with the retaining screws.
• Reinstall the internal lithium‑ion battery. Reconnect the AC power cord and turn on the monitor.
• Perform a full functional test: verify that all front‑panel keys respond correctly, that the LEDs illuminate as expected, and that no “keypad communication error” or similar alarm appears on the screen.
• If any key is unresponsive or behaves erratically, power down the monitor, reopen the chassis, and reseat the corresponding connector.
• Document the repair in the equipment service log.