Denon MC6000MK2EM - PCB Component Troubleshooting

46
FLOW CHART NO.9 (704-6K2-A615 CONRTOL 1 PCB ASS'Y)
NO
NO
The keys cannot be operated
Are the contact point and the installation state of the key
switches (SW100~SW170) and rotary encoder (SW150, 154,
158) nomal?
Does LED (D153~D180, D207~D287) 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?
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SW100, SW106, SW111, SW116, SW121, SW126, SW131,
SW136, SW141: IC100 60pin
SW101, SW109, SW114, SW119, SW124, SW129, SW134,
SW139, SW144: IC100 61pin
SW102, SW108, SW113, SW118, SW123, SW128, SW133,
SW138, SW143: IC100 62pin
SW103, SW105, SW110, SW115, SW120, SW125, SW130,
SW135, SW140: IC100 63pin
SW104, SW107, SW112, SW117, SW122, SW127, SW132,
SW137, SW142: IC100 64pin
SW147, SW153, SW157, SW162, SW166, SW167, SW168,
SW169, SW170: IC100 65pin
SW148, SW151, SW155, SW159, SW163: IC100 66pin
SW149, SW152, SW156, SW160, SW164: IC100 67pin
SW161, SW165: IC100 70pin
Rotary encoder
SW150, SW154, SW158: IC100 70pin
Re-paste the switches correctly or replace the poor switches.
YES
YES
YES
Check the Q100~Q120, IC101, IC102, IC107 and surrounding,
and replace any faulty parts.
NO
Check the key switches and the rotary encoder and and
surrounding, and replace any faulty parts.
YES
Replace IC100.