🔋🖨️ HP 30V 830 mA Printer Power Supply
 
(30V DC 0.83A AC Adapter • 25W • 4.7 mm × 1.7 mm Barrel Connector • No Pin)

This AC adapter delivers 30V of regulated DC power to HP DeskJet, PSC, OfficeJet, and Photosmart printers. It was the standard low‑wattage supply for compact home printers in the early 2000s.
 
🔧 Charger Form
Input: 100–240V AC, 50/60Hz
Output: 30V DC, 0.83A (25W)
Connector: 4.7 mm outer / 1.7 mm inner barrel, no center pin
Common part numbers:
HP: 0957‑2146, 0957‑2269, 0957‑2286
 
🖥️ Compatible Devices
🟦 HP DeskJet / PSC / OfficeJet
DeskJet 3320, 3420, 3520, 3650, 3740, 3845
DeskJet 5150, 5550, 5650, 5850
PSC 1110, 1210, 1310, 1350, 2110, 2175, 2210
OfficeJet 4215, 4255, 5500, 5510, 5600 series
🟦 HP Photosmart
Photosmart 7150, 7260, 7350, 7450, 7550
Photosmart 7660, 7760, 7960
 
✅ Common Uses
🔌 Powering compact HP DeskJets, PSCs, and Photosmarts
🧩 Replacing lost/damaged OEM 30V bricks
🧪 Testing small printers with a known‑good 30V supply
 
🧠 Signal Format
⚡ Input: Universal AC (100–240V)
🔋 Output: Regulated 30V DC, 25W max
🔌 Simple 2‑wire barrel, no center pin
 
⚠️ Things to Watch Out For
🔌 Connector is smaller than the common 5.5 mm barrels — only fits the 4.7 mm × 1.7 mm jack
🧪 Always confirm the printer’s underside label (30V input) before use
 
🛠️ Quick Tips for Beginners
🧭 Check the printer’s underside for “30V 830 mA” rating
🔌 Use only with printers that accept the 4.7 mm × 1.7 mm barrel
🧪 If printer won’t power on, inspect barrel tip for wear or oxidation
🧯 Label adapters clearly to avoid mix‑ups with HP’s 32V or 20V bricks
🧵 Keep one in your collection to cover HP/Lexmark’s compact inkjet era