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f370 test is ok but after printing white paper


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to everybody

now i am repairing a frontier 370   in which i have some problem with laser bloc

with error SOS CALL A TECHNICIAN i solve the problem by changing the ldd board

i correct the printer to have a good daily setup.  when i started to print allthe sheet of are white

thanks for helps

best regards

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you have to test laser frist,

1) open upper covers

2) remove  screw where fix laser unit

3) pullup 70% angale laser unit ( distrbution side)

4)  put some paper pcs  interlock swichs

5) see machine is ready to print mode

6) take whaite paper pcs (lick set up print back side)

7) the laser unit  under side have  small solenoid and door

8) near door  put paper pcs (no 6)

9)  send scaner  side some of test print  lick paper set up

10)  see  laser unit   have some expose light  to paper  pcs ( its very small light , please check your room light off )

11)  check 2-3 times

12)  tel me what happen

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