Denon D-T1 Service Manual page 42

6.3. No sound is output from inputs except DIGITAL IN
No sound is output from the TUNER, ANALOG IN
and BLUETOOTH inputs
YES
Check the audio signal output of the function
selector
MAIN PCB
[U17 : 3, 13pin]
Audio signal is output to [U17 : 3, 13pin]
YES
Check the I2S signal output of the ADC
MAIN PCB
[U16 : 9, 10, 11, 12pin]
I2S signal is output as normal from [U16]
YES
Check I2S between [U5 : SPHE8104] and [U19 :
STA339BW]
MAIN PCB
[R250, R365, R366, R367]
I2S is input as normal to [U19]
YES
Check the following parts and surrounding
circuits
MAIN PCB
[U19]
NO
No issues in circuits after Function SEL.
Go to "6.4. Abnormality in specific source"
NO
Check the state / soldering for the following
parts.
MAIN PCB
[U17]
Check the surrounding circuits.
NO
Check the state / soldering for the following
parts.
MAIN PCB
[U16]
Check the surrounding circuits.
NO
Check the following parts and surrounding
circuits
MAIN PCB
[U5]
6.4. Abnormality in specific source
6.4.1. Abnormality in TUNER
No sound is output from the TUNER input source
YES
Check of Control Data.
MAIN PCB [U8 : 3, 4pin]
Control data is input as normal to [U8 : 3, 4pin]
YES
Check the Audio output.
MAIN PCB [U8 : 7, 8pin]
Audio signal is output as normal to [U8 : 7, 8pin]
when TUNER receives a station
YES
Check the audio line of the [U8] output
MAIN PCB
[U8 : 7, 8pin] → [U17 : 1, 12pin]
Check the audio signal line
42
NO
Go to "6.4.2. Abnormality in BLUETOOTH"
NO
MAIN PCB
Check the data line from [U5 : 119, 120pin] to [U8
: 3, 4pin].
NO
Check the circuits around [U8]. If there are no
abnormalities, there may be a defect in [U8].
(Replace [U8].)