HP DESKJET 3820 technical Question

  • Thread starter Thread starter Peter Watt
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Peter Watt

No paper movement.

On the left hand side (viewed from the front with cover off) is a grey gear
cam wheel with projecting stub.
In certain positions of rotation this wheel permits the paper lift cam
follower mechanism to elevate and in synchronism with the rotation of other
parts allows a sheet of paper to be drawn of the top of the feed stack.

The grey gear wheel via a spring loaded connecting rod also actions a
'completed sheet push out and drop' assembly.

There is an associated part proximal to the gear wheel that has three
toothed wheels and which can rock against a spring action and brings cogs
into contact with the grey gear wheel.

The current printer problem is that the grey gear wheel and rocking part do
not move at all, and no paper is lifted.

Seen before? Your comments appreciated.

Peter Watt
 
This sounds like the problem I had. I also have a fried who had the
same problem. In both cases they were still under warranty and after a
call to HP support were replaced.


DT
 
Peter Watt said:
No paper movement.

On the left hand side (viewed from the front with cover off) is a grey gear
cam wheel with projecting stub.
In certain positions of rotation this wheel permits the paper lift cam
follower mechanism to elevate and in synchronism with the rotation of other
parts allows a sheet of paper to be drawn of the top of the feed stack.
Click to expand...
There is a black steel rod with 90 bend and taper the rotates upward 30
degrees anticlockwise there is also a metal plate that rises, its hard to
see but the black rod links right across to the cleanining station area
where there is a cam system.
If the cleanong station is very inked up clean it.
Also try a mechanical reset ie rotatate the large rubber roller wheels

Good printer the 3820 worth fixing yourself...
 
Peter Watt said:
No paper movement.

On the left hand side (viewed from the front with cover off) is a grey gear
cam wheel with projecting stub.
In certain positions of rotation this wheel permits the paper lift cam
follower mechanism to elevate and in synchronism with the rotation of other
parts allows a sheet of paper to be drawn of the top of the feed stack.
Click to expand...
There is a black steel rod with 90 bend and taper the rotates upward 30
degrees anticlockwise there is also a metal plate that rises, its hard to
see but the black rod links right across to the cleanining station area
where there is a cam system.
If the cleanong station is very inked up clean it.
Also try a mechanical reset ie rotatate the large rubber roller wheels

Good printer the 3820 worth fixing yourself...
 
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