What is the voltage input to HP C7671B - HP 4570C Flatbed Scanner

no PC?
22 years old today, a true relic.
ok not using it for its purpose, scanner
only as back lamp jig
ok./
sure 5vdc tried first, not wanting to blow it up
but there is no spec on this for sure pin functions nor voltages allowed
i use bench supply variable from 1 to 20v.
and not smoke it.

replace the rectifier pack as there should be no ac voltage at the voltage regulator
DC voltage should be 14.5-14.8 max

Cut the mini din wire, you will see four wires inside the sleeves. The red wire is positive terminal, and black wire is negative terminal. Use any 12V DC adapter to connect. The adapter will light up. Good Luck.

It should give the voltage/wattage on the scanner and the power supply.
Voltage Required AC 110/220 V ± 10%

Power Consumption Operational ( Standby ) 19 Watt ( 6 Watt )

Electrical specifications NOTE: The HP Deskjet automatically accommodates the worldwide range of AC line voltages and frequencies. There is no on/off switch on the power adapter. Category Specification Input voltage 100 to 240 volt ac (VAC) (+/- 10%) Input frequency 50 to 60 Hertz (Hz) (+/- 3 Hz) Power consumption (maximum) 4 watts maximum when off

4 watts minimum when idle

45 watts maximum average printing (Printer carries the ENERGY STAR emblem)

Specifications:

Manufacturer: HP

Input: 100-240V, 50/60Hz

Output: 32V, 16V

You can get more information here:
http://www.unitedsale.com/product_info.php?products_id=18583

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did you get this fixed

From the users guide:

Power specifications
. Power consumption: 50W maximum
. Source (Input) Voltage: 100 to 240 VAC*, grounded
. Input Frequency: 50 to 60 Hz
. Current: 1A maximum
* Figures are based on using the AC adapter that came with your unit (HP part number 0950-2880)


Her's a link to the user guide:

http://h10032.www1.hp.com/ctg/Manual/bpu03123.pdf