Denon HOME 250 - Page 46

TROUBLE SHOOTING
2. No sound from the output speakers
Is there a connection between the router and this
unit?
Connect router to this unit according to "QUICK
SETUP GUIDE".
YES
NO
NO
Check the soldering of peripheral parts.
If nothing is abnormal, the speaker unit is faulty.
Check the audio DSP input.
INPUT :
[IC1001 : 1pin] PLD_BCLK
[IC1001 : 2pin] PLD_DATA
[IC1001 : 3pin] PLD_LRCK
Check the digital amp input.
INPUT : [IC2001, IC2002]
6pin CH*A
8pin CH*B
16pin CH*A
18pin CH*B
Check the digital amp output.
OUTPUT : [IC2001, IC2002]
39pin OUT_A
36pin OUT_B
31pin OUT_C
28pin OUT_D
Are the settings correct in the HEOS app?
YES
OK
OK
OK
NG
NG
NG
Check the soldering of peripheral parts.
If there are no abnormalities, Network Module is
faulty.
Check the soldering of peripheral parts.
If there are no abnormalities, [Audio DSP IC] is
faulty.
Check the soldering of peripheral parts.
If there are no abnormalities, [Digital amp IC] is
faulty.
1. The unit does not power on
Is the status LED on the front
blue?
Are there any improper connec-
tions in the connectors between
each PCB?
Check the parts of the secondary
power circuit, such as the SMPS
PCB and regulator, and replace
any faulty parts.
Connect the connectors correctly.
YES YES
Reset this unit and check again from the start.
Remove the AC plug and then reinsert it.
Is the Status LED now lit in blue?
NO NO
The AC inlet is not making proper contact. Replace
the faulty part.
NO
YES
Before Servicing
This Unit
Electrical Mechanical Repair Information Updating
46