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Slide switches cannot be operated.

Are the contact point and the installation state of the Slide

switche (SW174) normal?

When switching Slide switch (SW174), does the voltage of 11

pin of IC109 increase?

Re-paste the switches correctly or replace the poor switches.

YES

FLOW CHART NO.10 (704-6K2-A615 CONRTOL 1 PCB ASS'Y)

FLOW CHART NO.11 (704-6K2-A616 CONRTOL 2 PCB ASS'Y)

The keys cannot be operated

Is the FFC(CN100) correctly connected ?

Are the contact point and the installation state of the key

switches (SW400~SW411) nomal?

YES

Connect the FFC correctly.

Check A3.3V is output.

YES

Replace IC109.

Re-paste the switches correctly or replace the poor switch.

YES

Does LED (D412~D431, D434~D445 ) light correctly?

Check the Q403~Q414, IC401 and surrounding, and

replace any faulty parts.

When pressing each key switches, turning rotary switches

and turning rotary encoder, does the voltage of each pin of

IC100 (shown below) decrease?

------------------------------------------------------------------------------

SW400, SW401, SW402, SW403: IC100 66pin

SW404, SW406, SW408, SW410: IC100 67pin

SW405, SW407, SW409, SW411: IC100 70pin

Replace IC100.

YES

Check the key switches and the rotary encoder and and

surrounding, and replace any faulty parts.

Denon MC6000MK2EM User Manual

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