HP LaserJet M4345 MFP: wired color files and 600-sheet monochrome work review

For wired document capture when printed pages can remain one-sided

The base HP LaserJet M4345 MFP suits an established wired office that needs monochrome documents, standalone copies and color files delivered through configured network services. Its important distinction is that automatic two-sided scanning is built in, while automatic two-sided printing and analog fax hardware are optional. A shared family description can easily hide that difference.

This is the M4345 generation, identified as CB425A in HP's original comparison and US selection guide. HP's US product page explicitly marks it discontinued and displays option CB425A#BCC. This assessment covers the separately documented US low-voltage M4345 configuration, 110–127 volts at 50/60 Hz; it does not claim that every regional option has that supply. Inspect the actual rating label before installing a previously owned machine.

HP declares up to 45 one-sided Letter pages per minute, separately 43 A4. These are maker rates rather than measurements from this review. The original US selection guide recommends 5,000–20,000 printed pages monthly. Its separate 200,000-page maximum duty figure is not a routine monthly target.

A real color scanner with a monochrome print engine

The 50-sheet automatic document feeder supports ordinary Letter, Legal and A4 originals. Its automatic duplex scan feature and the e-mail screen's original-sides setting are documented independently of the optional print duplexer. Select a two-sided original when sending a double-sided document; do not assume the default reads its back. The sources establish automatic capture, but do not establish a single-pass mechanism.

The glass accepts Letter and A4 originals and is the instructed choice for receipts, worn documents, photos and books. Legal originals belong in the feeder: the supported feeder length does not establish a Legal-sized glass. Place glass originals face down and feeder originals face up. Color scanning produces color electronic files; printed output and photocopies remain monochrome.

Optical scan resolution is up to 600 dpi. Higher resolution and output-quality settings increase file size, so choose settings for the destination instead of treating the largest file as automatically preferable. For repeated folders or e-mail recipients, the administrator can configure destinations rather than requiring every operator to recreate them.

Ethernet carries sending; USB carries printing

Included connections are an embedded Jetdirect 10/100 Ethernet interface and USB 2.0 computer port. A compatible printer driver is still needed. The original USB instructions specify an A-to-B cable; a USB socket does not turn this model into a desktop USB scanner.

For network capture, HP documents configured SMTP e-mail and administrator-enabled network folders. E-mail requires a usable gateway address, appropriate authentication when required and a working network arrangement. Folder sending needs an available destination and suitable permissions. These are actual delivery paths to files on a computer or in its mailbox, rather than a promise of a modern pull-scan app.

The setup guide configures digital sending through the printer's IP address in a browser. Verify gateway and destination compatibility with the actual present network; the manual's old operating-system list is not evidence that every current server or security policy works unchanged. HP separately says Send to E-mail and Send to Folder do not work through the PC USB connection.

Wireless adapters are optional. Included AirPrint or Mopria operation is not established here, and an Ethernet interface alone does not prove either mobile protocol. Optional Digital Sending Software workflow destinations likewise do not become included features merely because they appear in the family manual.

Six hundred ordinary sheets, with manual second-side work

The base includes a 100-sheet multipurpose tray and one 500-sheet cassette, totaling 600 ordinary sheets. The original tables explicitly include Letter, Legal and A4 in both feeds, with capacities stated for 75-g/m² paper. Extra 500-sheet cassettes, the 75-envelope feeder and finishing accessories are separate purchases.

Without the optional duplexer, the supported driver can guide a manual second pass. The Windows instructions reload the printed stack into tray 1, printed side up and bottom edge first, after removing blank paper; follow the actual prompts and continue at the panel when requested. Allow operator time and verify page order before a long job.

Tray 1 also handles up to ten supported envelopes, using the specified size, weight and one-sided path. It is not a 600-envelope feed. The paper cassette allows 60–120-g/m² stock, but the print routine warns against duplex paper above 105 g/m². Media-specific instructions take precedence over a broad weight headline.

Private jobs, toner and operating space

The included M4345-generation hard disk is 40GB; it is not the older non-M 4345's 20GB unit. With a compatible driver, Private Job takes a user name, job name and four-digit PIN. The user retrieves that job at the control panel and enters the PIN before release. Released private jobs are deleted; the guide also warns that power-off deletes temporary private jobs.

The exact black cartridge is Q5945A. HP's historical declaration is up to 18,000 pages at five-percent coverage, not an ISO yield or a remaining-toner guarantee. Its body is approximately 30.0 inches wide, 19.0 deep and 21.5 high; open trays, scanner access and service space require considerably more room. If automatic print duplex, included fax or substantially more standard input is essential, choose the documented equipped variant rather than silently adding its hardware to this base model.