Denon DNP-730AE - Check the Audio Block

34
3.3. Check the Audio Block
Check the Power Supply Voltages for AUDIO.
MAIN_PCB
・
+9V_A [IC501
、
8pin]
・
-9V_A [IC501
、
4pin]
Check the status of the following parts and check the solder.
MAIN_PCB
IC503,IC504,Q507,Q508,Q509
Other, connected circuit.
NO
YES
Check the Power Supply Voltages for AUDIO-DAC.
MAIN_PCB
・
(+3.3V) [IC511
、
9pin]
・
(+5.0V) [IC511
、
15pin]
Check the status of the following parts and check the solder.
MAIN_PCB
IC505,IC506
Other, connected circuit.
NO
YES
Check the MUTE signal.
MAIN_PCB
Collector of Q504 is set to + 12V.
Check the status of the following parts and check the solder.
MAIN_PCB
Q506,Q506,IC113
Other, connected circuit.
NO
YES
Check the Power Supply Voltages for AUDI-DAC.
MAIN_PCB
There are no abnormal voltages, such as middle potential.
There is no abnormal waveform.
DAC_CS [IC511
、
10pin]
DAC_MOSI [IC511
、
11pin]
DAC_CLK [IC511
、
12pin]
DAC_RST [IC511
、
14pin]
Check the status of the following parts and check the solder.
MAIN_PCB
IC511,IC113
Other, connected circuit.
NO
YES
Check the audio signal of AUDI-DAC.
MAIN_PCB
There are no abnormal voltages, such as middle potential.
There is no abnormal waveform.
(LRCK) [IC511
、
4pin]
(DATA) [IC511
、
5pin]
(BCK) [IC511
、
6pin]
(SCL) [IC511
、
7pin]
Check the status of the following parts and check the solder.
MAIN_PCB
IC509,IC512,IC501,IC113
CN200
（
CY920MODULE)
Other, connected circuit.
NO
YES
Check the Analog AUDIO signal.
MAIN_PCB
・
Audio signal is output from output of OP-AMP.
Check the status of the following parts and check the solder.
MAIN_PCB
IC511,IC501,IC502,IC507,IC508
Other, connected circuit.
NO
YES
Check the status of the following parts and check the solder.
Output connector JACK500