Service Manuals, User Guides, Schematic Diagrams or docs for : CANON Fax B100 B100_009

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B100_009


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                                  SERVICE BULLETIN                                                FAX
                                         Issued by Canon Europa N.V.


       MODEL:       FAX-B100, MultiPASS 10                                No.:  B100-009 Rev. 1
                                                                                (HS-B0E-0037-01)
                                                                          Date: 02.08.96


LOCATION:              SCNT BOARD ASSY

MODEL NO.:             H12-0273 (EC)        H12-0303 (EC)

SUBJECT:               PATTERN CUT / PARTS ADDED / PARTS CHANGED


OUTLINE

R241 was added as a countermeasure to the problem During F/T switching, the machine goes on
hold if the handset is lifted, with the result that the ESS time was shortened. To counter this problem,
a pattern cut, jumper wire addition and resistor relocation will be implemented.

* If the HH1-1984-06 NCU (HG5-0616 version 03) is used, a countermeasure treated SCNT must be
  used.

* If the SCNT is not treated this countermeasure, NCU version over 03 cannot be used with it.


SERVICE TIP

There are restrictions on the combination of SCNT, MAIN ROM and NCU.
Further details will be issued later.


Pattern change
                 +5V changed to VCC1




                 For details, see following pages.
FAX                                              -2-                      B100-009 Rev. 1


Items of caution

1.    Check with a tester after the pattern cut has been made.
2.    Do not cut other patterns nearby.
3.    Be sure not to short other parts, circuits.


Affected machines

With HG5-0619/HG5-0622 SCNT BOARD ASSEMBLY are to be used with PCB HH1-1983-03 and
HH1-1983-05, and the HG5-0616 NCU BOARD ASSEMBLY is to be used with PCB HH1-1984-06.


Circuit check with tester

1.    Check that the circuit is cut between A and A.
2.    Check that the circuit is connected between B and B.
              * Check that the pattern has not been cut wrongly.


Component side
FAX                                                  -3-                                     B100-009 Rev. 1


Procedure when PCB HH1-1983-03 has an 820  resistor attached. (See Service Bulletin B100-015.)

1.    If the 820  resistor is attached to the component side, cut it off with a pair of wire cutters. If it is
      on the soldered side, leave it as it is.



2.    Cut the 5V pattern line.
3.    After cutting away the solder from the through hole, thread the jumper wire through, and solder
      it.
4.    Add the 820  resistor to the solder side. (Details are the same as Service Bulletin B100-015.)

Component side                          Jumper wire             Pattern cut




Solder side




                                                                        Add 820  resistor
                                                                        (lower side of Q34E-FB47)

                                                                        Be careful of the solder bridge
FAX                                              -4-                                  B100-009 Rev. 1


Procedure when PCB HH1-1983-03 has no 820  resistor attached.

1.    Cut the 5V line pattern. (Check the circuit with a tester.)
2.    Feed the jumper wire and the 820  resistor into the through hole, and solder them.
3.    Solder one end of the jumper wire to the lead of the resistor.
4.    Cut the jumper lead in order to prevent shorting. (It should not be more than 1mm on the
      soldered side.)


Component side




                                           Be careful not to short out the neighbouring patterns.
FAX                                              -5-                                 B100-009 Rev. 1


Procedure for PCB HH1-1983-05

1.    Cut the 5V line pattern. (Check the circuit with a tester.)
2.    Feed the jumper wire through the through hole, and solder it.
3.    Cut the jumper lead in order to prevent shorting. (It should not be more than 1mm on the
      soldered side.)

                                        Solder
                                                       Jumper wire


                                                              PCB
                                                              Resist

Component side




         The section where the 820  resistor is to be attached has been made into a pattern.
FAX                                              -6-                               B100-009 Rev. 1


PARTS

 MODEL NO.                PARTS NAME                    PARTS NO.     VER.   IC      LOCATION NO.
  H12-0273      OLD   SCNT BOARD ASSY                  HG5-0619-070    04     --          ---
                NEW   SCNT BOARD ASSY                  HG5-0619-070    05
  H12-0303      OLD   SCNT BOARD ASSY                  HG5-0622-060    03    --           ---
                NEW   SCNT BOARD ASSY                  HG5-0622-060    04




MACHINE



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