Denon MC6000MK2EM Service Manual page 47

FLOW CHART NO.10 (704-6K2-A615 CONRTOL 1 PCB ASS'Y)
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?
Replace IC109.
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?
Does LED (D412~D431, D434~D445 ) light correctly?
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
YES
YES
YES
YES
YES
NO
Re-paste the switches correctly or replace the poor switches.
NO
Check A3.3V is output.
NO
Connect the FFC correctly.
NO
Re-paste the switches correctly or replace the poor switch.
NO
Check the Q403~Q414, IC401 and surrounding, and
replace any faulty parts.
NO
Check the key switches and the rotary encoder and and
surrounding, and replace any faulty parts.
47