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Green rectangular circuit board with silver connectors and black components, new condition

YINGHUA

YINGHUA Printhead Power Supply Board T790

SKU CH-DDCM-T3N1H

Printhead power supply board for HP DesignJet T790 large-format printers

  • Product categoryPrinthead
  • Powers HP T790 printhead with dedicated supply board
  • Replaces original power module for compatible HP printers
  • New condition ensures reliable operation from first install
  • Designed specifically for T790 printhead compatibility
  • Listed by manufacturer in April 2026 for current availability

Compatible Printhead Power Board

The YINGHUA board replaces the original power supply module inside HP DesignJet T790 large-format printers. Service engineers and in-house maintenance teams use it to restore printhead firing voltage after a board failure.

Single-Printer Interface Constraint

The board connects only to the T790 printhead carriage and main logic assembly; it cannot be adapted to other DesignJet models or third-party wide-format machines. Firmware handshakes are locked to the T790 service manual revision.

Restores Full Printhead Operation

Once fitted the board delivers the specified drive waveforms so every nozzle fires at rated frequency. It does not increase maximum print speed or add colour channels beyond the factory configuration.

How it compares

Measured against everything we stock in Print & Scan Accessories, at today’s prices. Recalculated every night.

Price $351.99
Pricier than about 87% of the 5,855 comparable items (median $91.99).

Specifications

Product
Product categoryPrinthead

Questions about this item

How do I know this power supply board is the right one for my HP T790?

The board is specifically labelled as fitting the HP T790 model, so matching that printer model confirms compatibility.

What does the printhead power supply board actually do inside the printer?

It delivers the precise voltages the printhead needs to fire ink droplets, so a working board keeps the HP T790 printing correctly.

Does the board use a standard connector that matches the HP T790?

The board is built to fit the HP T790, meaning its connectors and mounting align with that printer's internal layout.

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