Lexmark T630 -- MP Feeder Door/Platform Breakage

The Optra S and the T's up through the T640 all have much the same MP Feeder Door/Platform construction, but for some reason the T630's is the most prone to hinge breakage of any of them. We see this often.

A replacement door/platform is P/N 56P1309. Lexmark calls it 'Cover assembly, lower front'.

To remove one of these, open it out to about a 40 degree angle from vertical and tug on it forcefully, using your thumbs as leverage anchors. It will pop free of its flatted hinge pins. Install a new one by forcing its hinges onto the hinge pins' flats.

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Lexmark T630 -- Dusty Biscuit Fans

The small biscuit fan by the fuser at the right side of T630 printers accumulates dust at quite a rate. Here's an example.

This machine only has 18,000 pages on its maintenance counter. We've seen fans much worse than this -- clogged with dust to the point of making a buzzing noise.

Blowing the fan out with compressed air is usually all it takes to restore it to good order. These fans are long lasting and seldom need to be replaced.

Should you need to replace a failed or terminally noisy fan, the P/N is 56P1408; Lexmark calls it the 'cartridge fan'. The fan is held in place by two push-nuts. Coax the push-nuts off their posts with a mechanic's pick to remove a fan.

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HP CLJ 2600n Fuser Access

1) Paper Tray

2) Right Side Cover
> One M3x8mm washerhead screw at lower rear.
> Tug the cover away at the lower rear and it will pop free.

3) Left Side Lower Cover (Handgrip Portion of Cover)
> One M3x8mm washerhead screw in handgrip well.
> One claw in front; two claws at underside. Pry the cover away.

4) Left Side Upper Cover
> Pry at the rear edge to free it.

5) Top Cover Grey Inset
> There are two arrowhead marks at the rear. Pry there to free the inset.

6) Top Cover
> Four M3x8mm washerhead screws.
> One flat cable connection.
> Lift the cover away.

7) Face-Down Delivery Platform
> Pry at the rear edge to free it.

8) Cable/Wire Connections
> Cable connection at fuser motor.
> Cable connection at J204.
> Power cable connection at J203. Free the cable from its restraints. The ty-wrapped restraint can be pried up out of the PCA.
> Two sensor cable connections at the left side. CAUTION -- it's easy to dislodge the sensors when disconnecting their cables.
> One red wire terminal at the left side.

9) Fuser
> Two M3x8mm washerhead screws at the fuser's rear -- they're marked by arrowheads.
> One M3x8mm washerhead screw at the right lower rear of the fuser.

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Okidata Microline 380 Teardown

Following is a procedure for a complete teardown to thoroughly clean a machine and restore it to good order.

1) Platen Knob

2) Access Cover
> Lift the cut-sheet guide slightly and tip it back so it lies flat.
> Open the access cover fully.
> Tug leftward near the left side hinge to free it.

3) Cut-Sheet Guide
> Spread its hinge 'ears' to free it.

4) Paper Separator
> Tip it rearward to free its clips from the platen bearings.

5) Main Cover
> Two M4x10mm pan head screws w/captive washers at the rear.
> Tip the cover up at the rear to remove it.

6) Mechanism
> Ground wire terminal at right side end of carriage rail -- one M3x8mm pan head screw w/captive washers.
> Ground strap end behind transformer -- one M3x6mm pan head screw w/captive washers.
> Two flat cables in ZIF connectors.
> Four cable connections.
> Four claws hold the mechanism to the base pan -- two at the left; two at the right.

7) Transformer w/Attached PCA and Line Cord
> One cable connection.
> Two ground terminal screws -- M4x8mm pan head w/captive washers.
> Four M4x8mm pan head screws w/captive washers.

8) Main Logic PCA w/Control Panel
> One M3x6mm pan head screw w/captive washers by the interface connector.
> Four M3x8mm pan head threading screws.
> Two claws, left and right sides near the front.

9) EMI/RFI Shield
> Four M3x8mm pan head threading screw.
> Push down on one claw near the right side end to let the item move rightward.

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Mechanism Teardown

1) Printhead

2) Card Guide

3) Platen

4) Left Side Bail Lever and Spring

5) Bail Rod

6) Right Side Bail Lever and Spring

7) Platen Cradle

8) LF Motor

9) Change Lever

10) Change Gear and Spring
> NOTE that the gear's extended hub goes out.

11) Idler Gear
> NOTE that the flanged end goes inboard.

12) Pinch Rollers Lever and Pinch Rollers Assembly

13) Tractor Drive Gear

14) Tractor Drive Shaft (Square Shaft)

15) Tractors Assembly

16) Tension Strip

17) Carriage Belt Tensioner Clamp Screw
> One M3x6mm pan head threading screw w/loose flat washer.

18) Carriage Belt Tension Spring

19) Carriage Belt off its Pulleys

20) Carriage Belt Idler Pulley

21) Carriage Motor Assembly
> Two claws.

22) Carriage
> Two M3x8mm pan head screws w/captive washers.
> Carefully free the flat cables from their restraints.

23) Front Carriage Rail/Ribbon Drive Rack

24) Left (white) and Right (black) Carriage Rail Eccentric Adjustment Bushings
> NOTE the factory alignment marks.

25) Carriage Rail w/Carriage Frame

26) Bail and Home Sensing Switches
> NOTE: The bail sensing switch's retainer is likely to break.

27) Optical Sensor

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NOTES

A) Leave off the bail components at reassembly until the printhead/platen gap adjustment has been performed.

B) Printhead/platen gap is 0.016" at thickness setting '1'. Gap/parallelism adjustment is done with the eccentric bushings at the ends of the carriage rail.

C) To enter Menu Mode, have paper loaded, press FONT and PITCH simultaneously.

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Lexmark X215 Paper Tray Differences

Later machines have a feature added that makes early paper trays incompatible with later chassis. An early paper tray in a later chassis will not close properly, resulting in pickup failures.

The added feature is automatic lowering and latching of the paper tray's paper platform as the tray is withdrawn.

The feature consists of a linear cam in the chassis' left side way, and a corresponding actuator attached to the left side of the tray's paper platform. When the tray is withdrawn, the cam strikes the actuator and forces the paper platform down. Owing to the cam's position, it interferes with complete closure of early trays.

There appears to be no retrofit available.

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Lexmark X215 'Door Open' Message

The cover open switch is a lever-operated microswitch at the right front corner of the power supply PCA. A black plasic lever on the chassis' right side actuates it when the front door is closed.


If you're getting false 'door open' messages after having removed and reinstalled the electronics pan, it's probably because you got the switch's lever over top of the black plastic lever instead of underneath it as you were putting the electronics pan in place.


Fortunately, there's no need to take the electronics pan back out. Just remove the rear and the right side covers. The black plastic lever will be accessible. Take out the lever's screw, correct the lever's position and reassemble.

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Lexmark X215 Pickup Roller Replacement

The pickup roller with its square shaft and bearings are removed and replaced as an assembly.

1) Cartridge

2) Paper Tray

3) Rear Cover
> Four M3x10mm bright washerhead threading screws. Two of them are very low down in deep wells.
> Tug the cover rearward to remove it.
> MIND the parallel connector's bails when reinstalling this cover.

4) Right Side Cover (Optional. It's not necessary to remove this cover, but with it removed, the machine won't rock when it's laid on its right side.)
> Tug the cover forcefully rearward to remove it.

5) Left Side Cover
> Disconnect the speaker.
> Tug the cover forcefully rearward to remove it.

6) Drivetrain Assembly
> NOTE the green ground wire at the upper centre screw.
> Six M3x10mm bright washerhead threading screws.
> One cable connection.

7) Electronics Pan
> Four cable connections in view at the rear.
> Two M3x10mm bright washerhead threading screws at the rear. NOTE the black ground wire at the left side screw.
> Lay the machine on its right side.
> Ten M3x10mm bright washerhead threading screws from underneath. NOTE that two of the screws are accessed through 10mm diameter holes in the pan.
> CAUTION: Two of the following seven cable connections can be transposed. They're the two smallest two-conductor connections -- CN4 and CN6. You may want to mark one of them to preclude transposing them.
> Seven cable connections.

8) Gear Support Plate at Front Left
> Three M3x10mm bright washerhead threading screws.

9) Pickup Clutch
> Pull it straight off. NOTE that it's indexed to go on only one way.

10) Pickup Roller w/Shaft
> The left side bearing has a claw. Release the claw and the bearing can be slid rightward, enabling removal of the item.

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