HP LaserJet 4250 Support Question
HP LaserJet 4250 Support Question
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Question posted by allvi on April 21st, 2014
How To Replace A Hp Lj 4250 High Voltage Power Supply
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Related HP LaserJet 4250 Manual Pages
HP LaserJet 4250/4350 Series - User Guide - Page 137
... possible). the printer driver
proper printer
driver. (See Using the printer driver.)
●
Check that it
Printer memory.)
to
● Replace the
SLOW.
interface cable
with a high-quality
cable ... memory to the printer. (See
● The data file sent
steady, and that the power supplied to
the printer is
● Add more printer memory. (See Printer memory.)
●...
Service Manual - Page 10
......169 Screws used in the printer 170 Parts-removal tree ...171 Printer input tray, and cabinet wheel locks 172 Dc controller PCA diagram 173
User-replaceable parts ...175 Print cartridge ...175... (LJ 4250/4350 only 235 Power supply...236 Paper-feed belt assembly 243
Motors and fans...2. 45 Main cooling fan (left side 246 Cooling fan, right side (HP LaserJet 4250/4300/4350 Series printers only...
Service Manual - Page 118
It also provides a general description of the following topics: ■ Basic operation of the printer ■ Power supply ■ Laser/scanner assembly ■ Image formation ■ Paper pickup and feeding ■ 500-sheet feeder operation ■ 1,500-sheet feeder operation ■ Envelope feeder ■ Duplexer &#...
Service Manual - Page 119
... printer power is in the HP LaserJet 4250/4300/4350 only) begins to the initial rotation period. Basic operation of the printer
Printer operation can be divided into four systems: the control system (which includes the power supply and dc controller PCA), the pickup and feed system (which consists of various rollers and transports the media through the printer), the laser...
Service Manual - Page 188
... 12-Pin connector; print cartridge motor (HP LJ 4250/4300/4350 only)
J99 6-Pin connector; Tray 2 media size sensor, Tray 2 paper sensor
J77 8-Pin connector; Tray 1 paper sensor, Narrow-media sensor, Top-of-page sensor, Paper-feed sensor
174
6 Removing and replacing parts Laser/scanner PCA
J97 2-Pin connector; Power supply
J87 12-Pin connector; Tray 1 pickup...
Service Manual - Page 320
... operating, check the following items.
1 Make sure that the printer is plugged into the printer. See Power supply.
3 If necessary, replace the dc controller PCA. See Dc controller PCA.
306
7 ... DIMM (LJ 4200/4300 only).
6 Remove any HP Jetdirect or other printer components. Overview
Turn on position.
3 Make sure that the fan runs briefly, which indicates that the power supply is operational...
Service Manual - Page 321
... cord into the wall receptacle and connected to the printer.
The correct voltage (power) is off .
3 Replace the power-supply assembly, if necessary.
If problems with the power-on check perisist refer to the terminals. If the printer still does not turn on , the power switch might be defective.
1 Remove the power supply.
2 Measure the resistance between the two terminals of...
Service Manual - Page 322
... Control-panel assembly.
● (HP Laserjet 4200 and 4300 Series printers only) Replace the firmware DIMM. Note:
The fan only operates during the initial startup and while printing, and when the temperature inside of the printer. If the test is successful with the formatter removed, replace the dc controller PCA. See Power supply.
4 Replace the dc controller.
See Formatter...
Service Manual - Page 371
...
357 See Dc controller PCA.
7 Replace the power-supply assembly. See Dc controller PCA.
1 Press ( SELECT button) to continue.
2 Turn the printer off and then on.
3 Reseat the connectors between the laser/scanner and dc controller PCA (J83 and J84).
4 Replace the laser/scanner assembly. X Description 1 beam-detect error 2 laser error
A printer error has occurred. X Description 0 scanner...
Service Manual - Page 373
...
3 Cooling fan, right side (LJ 4250/4300/4350 only)
or
4 Main cooling fan, left side of the printer) and the power supply (location J63).
3 Replace the air-temperature sensor. See Cooling fan, right side (HP LaserJet 4250/4300/4350 Series printers only).
3 Replace the dc controller PCA. X Description 2 air-temperature sensor 3 Dc controller 4 power supply
Turn the printer off and then on.
58...
Service Manual - Page 398
.... Try a different media type. If the transfer roller loses conductivity, it .
The laser/scanner shutter door is not opening correctly.
1 Remove and reseat the print cartridge.
2 Verify that the transfer roller is defective. (The power supply contains the high-voltage circuit.)
Replace the power-supply assembly. If the image on . The effect might not work correctly with actions...
Service Manual - Page 401
... sure that face the outdoors. Replace the power-supply assembly. See Power supply.
The top cover should close completely when the print cartridge is not installed correctly. See Fuser. The static-eliminator teeth (just beyond the transfer roller) are deposited on the laser outlet of the printer or the laser inlet of the covers are in the paper...
Service Manual - Page 403
... setting is defective. Replace the print cartridge. The high-voltage connector springs protrude into the print cartridge cavity.
The power supply is turned off . Replace the power-supply assembly. Table 7-26 Loose toner or toner smear Possible cause The interior of the printer (see Print-quality submenu). The fuser roller is dirty.
Replace the assembly if it is too smooth...
Service Manual - Page 412
...replace the power supply. The high-voltage connector springs are dirty. The laser-beam drive circuit or highvoltage circuit is defective (not supplying the correct voltage).
1 Check the cables between the laser/scanner Inspect and reseat the connectors. Replace the laser/scanner assembly.
Select OPTIMIZE and set HIGH TRANSFER=ON.
See Power supply.
4 If, after replacing the power supply...
Service Manual - Page 413
... the dc controller PCA might be feeding two or more pages at on networks might be affecting the laser output.
If necessary, replace the laser/ scanner assembly.
See Transfer roller .
The high-voltage circuit is incorrect. See Power supply. Low-level signals that the software program is defective. Make sure that are occurring. Check with bubbled print...
Service Manual - Page 414
...
400
7 Troubleshooting The high-voltage circuit is incorrect. Clean the contacts if they are damaged or deformed, replace the contacts.
tray.
See Power supply. If the roller remains dirty after cleaning, or if the contacts are dirty. Replace the laser/scanner assembly. See Laser/scanner assembly.
Open the print-quality menu at regular intervals on printer rollers can cause...
Service Manual - Page 499
... assembly, 500-sheet feeder
RM1-1094-000CN
1
2
Paper-pickup-drive assembly, 500-sheet feeder
RM1-0056-000CN
1
3
500-sheet universal replacement tray (LJ 4200/4300)
RM1-0028-060CN
1
3
500-sheet universal replacement tray (LJ 4250/4350)
RM1-1088-000CN
1
(not shown)
Stop, detent
RC1-3303-000CN
1
(not shown)
Limiter, torque
RC1-3335-000CN
1
Accessories
485
Service Manual - Page 508
... list
Description 1,000-staple cartridge (3-pack)
1,500-sheet feeder 500-sheet feeder and tray 500-sheet universal replacement tray (LJ 4200/4300) 500-sheet universal replacement tray (LJ 4250/4350) Arm, cartridge-release Arm, paper pickup (LJ 4200/4300) Arm, paper pickup (LJ 4250/4350) Bushing Bushing, feed shaft Bushing, paper delivery Cable, accessory interface Cable, control panel...
Service Manual - Page 509
Table 8-21 Alphabetical parts list (continued) Description Cable, laser (LJ 4250/4350) Cable, media-size sensor, 1,500-sheet feeder Cable, power-supply inlet, 110-127 V (LJ 4200/4300) Cable, power-supply inlet, 110-127 V (LJ 4250/4350) Cable, power-supply inlet, 220-240 V (LJ 4200/4300) Cable, power-supply inlet, 220-240 V (LJ 4250/4350) Cable, sensor assembly, 500-sheet feeder Cable, sensor, top-...
Service Manual - Page 523
... assembly)
RM1-1066-000CN
Main drive assembly (LJ 4250/4350)
RM1-1067-000CN
Laser/scanner assembly (LJ 4250/4350)
RM1-1070-000CN
Power-supply assembly, 110-127 V (LJ 4250/4350) (also see Figure 8-9 Electrical components)
RM1-1070-000CN
Power-supply assembly, 110-127 V (LJ 4250/4350)
RM1-1071-000CN
Power-supply assembly, 220-240 V (LJ 4250/4350) (also see Figure 8-9 Electrical components...
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(Posted by sunilsharma904 12 years ago)