Denon MC6000MK2EM, Service Manual

Page: 47 / 98

47
NO
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
NO
Connect the FFC correctly.
NO
Check A3.3V is output.
YES
Replace IC109.
NO
Re-paste the switches correctly or replace the poor switch.
YES
Does LED (D412~D431, D434~D445 ) light correctly?
NO
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
YES
NO
Check the key switches and the rotary encoder and and
surrounding, and replace any faulty parts.