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HP U28 User Manual

HP U28
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3
Important service information and precautions
Repair must be performed by professional service technicians in a repair center. End users
should not perform these procedures.
Please note during servicing that the primary side is the high voltage area.
This monitor meets ROHS requirements. Be sure to use lead-free solder wire when soldering.
If you must change a capacitor, be sure to match the polarity as printed on the PCB.
If you must replace a capacitor, make sure the specification and part number match the BOM
and location.
If you must replace a capacitor, insert new parts carefully to avoid a short circuit caused by the
near pin.
Do not get the board wet. Water and moisture can cause a short circuit that causes
malfunctions.
To avoid damage, be sure to use lead-free solder.
When soldering, work quickly to avoid overheating the circuit board.
Keep the soldering iron tip clean and well tinned when replacing parts.
After repair, perform a close inspection of the circuit board to confirm it is in good condition.
After repair, perform a function test to confirm the power supply is working properly.
ERP Lot5 requirement
1. A professional repairer must have the technical competence to repair electronic displays and
comply with the applicable regulations for repairers of electrical equipment in the Member States
where the repairer operates. Reference to an official registration system as professional repairer,
where such a system exists in the Member States, shall be accepted as proof of compliance.
2. A professional repairer must have insurance that covers liabilities resulting from repairs,
regardless of whether required by the Member State.
RoHS (2002/95/EC) requirements
Applied to all countries that require RoHS.
The RoHS (Restriction of Hazardous Substance in Electrical and Electronic Equipment Directive) is a
legal requirement by the EU (European Union) for the global electronics industry sold in the EU and
other countries. Any electrical and electronics products launched in the market after June 2006 should
meet this RoHS requirement. Products launched in the market before June 2006 are not required to be
compliant with RoHS parts. If the original parts are not RoHS complaint, the replacement parts can be
non-ROHS complaint. If the original parts are RoHS compliant, the replacement parts MUST be RoHS
complaint.
If product service or maintenance requires replacing parts, confirm the RoHS requirement before
replacement.
General descriptions
This manual contains general information. There are two levels of service:
Level 1: Cosmetic/appearance/alignment service
Level 2: Circuit board or standard parts replacement

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HP U28 Specifications

General IconGeneral
Color depth8 bit
Pixel pitch0.116 x 0.116 mm
Screen shapeFlat
Pixel density157 ppi
Display diagonal28 \
Surface hardness3H
Display technologyLCD
Native aspect ratio16:9
Vertical scan range30 - 60 Hz
Maximum refresh rate60 Hz
Horizontal scan range27 - 136 kHz
Display number of colors-
Display brightness (typical)400 cd/m²
Supported graphics resolutions640 x 480 (VGA), 720 x 400, 800 x 600 (SVGA), 1024 x 768 (XGA), 1280 x 1024 (SXGA), 1440 x 900 (WXGA+), 1440 x 900, 1600 x 900, 1920 x 1080 (HD 1080), 2560 x 1440, 3840 x 2160
Pivot angle-90 - 90 °
Tilt angle range-5 - 23 °
Panel mounting interface100 x 100 mm
USB hub version3.2 Gen 1 (3.1 Gen 1)
DisplayPort version1.2
USB Power Delivery up to65 W
USB Type-A downstream ports quantity3
HP segmentHome
Package depth165 mm
Package width824 mm
Package height470 mm
Package weight10450 g
Operating temperature (T-T)5 - 35 °C
Operating relative humidity (H-H)20 - 80 %
AC input voltage100 - 240 V
AC input frequency50 - 60 Hz
Power consumption (max)155 W
Power consumption (standby)0.5 W
Power consumption (typical)45 W
CertificationMEPS; BSMI; CB; CCC; CE; CECP; CEL; EAC; ENERGY STAR®; FCC; ISO 9241-307; KC/KCC; NOM; PSB; SEPA; TCO Certified; TUV-S; UL/CSA; VCCI; Vietnam MEPS; WEEE; ISC; WW application; ICE
Product colorSilver
Country of originChina
Sustainability certificatesCE, ENERGY STAR, TCO
Weight and Dimensions IconWeight and Dimensions
Depth (with stand)189.9 mm
Height (with stand)531.4 mm
Weight (with stand)6350 g
Depth (without stand)43.4 mm
Width (without stand)637.1 mm
Height (without stand)371.2 mm

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