Question about Canon ImageRUNNER 1670F Copier
E246 Reading from/ writing to the soft counter memory cannot be done
An error occurs when checking DIMM: CP2120 (EEPROM areas on DIMM)
This is a very unusual fault. It is indicating a problem with the memory writing to the counter PCB.
FIrst thing to do is take off the back cover and look at the main pcb's. Please remember to power down and remove power supply from machine first. Any PCB that can be removed and re seated should be checked. Check all conections to main boards ans replace the covers. Power up and see if it all comes back on.
I just checked our website and my service information. I found the following. I suspect someone has been working on these machines or swapped some parts around.
Page 1 of 2
MODELS AFFECTED / SERIAL NUMBERS AFFECTED:
Digital Copiers, Including All imageRUNNER Products
Information About The New Soft Counter Circuits
GENERAL TECHNICAL INFORMATION
This Technical Publication presents information about the new Soft Counter circuit that replaces the mechanical counter
used in the past. There are three (3) PCB’s associated with the new Soft Counter circuit; the Counter Memory PCB,
Main Controller PCB and the Serial Number PCB. A description of their function is provided below. Use this
document as a reference for current and future models that use the Soft Counter circuit.
Counter Memory PCB
On the latest Canon digital copiers, such as the imageRUNNER 5000, imageRUNNER 8500 and imageRUNNER 2200
series, there are no mechanical counters. Instead there is a Counter Memory PCB. This PCB is usually mounted on the
Main Controller PCB with one screw. The Counter Memory PCB is imprinted with the serial number of the machine
the first time power is turned ON and cannot be moved to another machine. Attempting to do so will generate an E246
error code. In the event of a Counter Memory PCB failure, a new one from stock (see Note 4) can be installed into the
machine. At that point the Main Controller PCB will transfer its present total count as indicated in “Counter Check” on
the control panel (recorded the last time power was turned OFF) to the new Counter Memory PCB and the total counter
will increment from that count on. Never attempt to operate a machine without the Counter Memory PCB
installed! This may generate an E245 code, which can only be cleared by “zeroing out” the Main Controller PCB by
one of our A.P.R.F.’s (Authorized Parts Repair Facilities).
Main Controller PCB
The Main Controller PCB, aside from performing other tasks, retains the total count by means of SRAM with a battery
back up after power has been turned OFF. If, however, the Main Controller PCB has been replaced with either a new
one or a used one, it will read in and record the total count from the Counter Memory PCB retained the last time power
was turned OFF. The total count will then increment from that count on.
Even though the total count will be the correct value for that machine after replacing the Main Controller, the soft
counters in Service Mode will not. If a new Main Controller was used for the replacement, then all soft counters in
Service Mode (service counters in “Counter Mode”) will be zero. If, on the other hand, a used Main Controller was
used for this replacement, the soft counters previously recorded on that PCB would be shown. At that point it is
advisable to clear these values in Service Mode using Function>Clear>CNT-MCON.
All Main Controllers sent to our A.P.R.F.’s for repair will be “zeroed out” before being sent back to the dealer.
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04-30-02 GT I
The Counter Memory PCB and the Main Controller PCB should never be replaced simultaneously! This will
generate an E354 code and assistance from the Canon Reseller Technical Support Center Hotline will be required. If
the Main Controller is sent to one of our A.P.R.F.’s for repair, you must remove the Counter Memory PCB
before sending it out! Failure to do so will only increase down time for your customer.
If the Main Controller PCB is replaced, ensure that connector J1023 is connected. If it is not, an E350 will be
Serial Number PCB
The Serial Number PCB’s main function is to identify the machine’s serial number. This PCB cannot be moved to
another machine. Attempting to do so will generate an E355 and assistance from the Canon Reseller TechnicalError codes not listed in the Service Manual:
There are various error codes that are not listed in the Service Manual. Canon U.S.A., Inc. reserves the right to treat
these error codes as Proprietary Information. If you encounter any of the following error codes, contact your Canon
E245 E246 E247 E350 E354 E355
Please be advised that Canon U.S.A., Inc. treats the Counter Memory PCB and Serial Number PCB as “restricted” parts.
When a dealer orders these components they will be asked to provide the reason for their replacement, and the original
PCB will have to be returned to Canon U.S.A., Inc. for evaluation.
hOPE HELP TO SOLVE IT.
Posted on Jul 14, 2010
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Posted on Jan 02, 2017
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