Denon D-T1 - Page 43

6.4.3. Abnormality in ANALOG IN6.4.2. Abnormality in BLUETOOTH
Check the OP-AMP of [U13] output.
MAIN PCB
[U13 : 1, 7pin]
Audio signal is output as normal
Check the Control Port of BT Module.
(check by switching the input to BLUETOOTH
and turning pairing on)
MAIN PCB
[U15 : 20, 22, 23, 24, 38, 42, 45pin]
20pin : Hi
22pin : "Lo" at Pairing ON.
23pin : "Hi" at Pairing ON.
24pin : Lo
38pin : Lo
42pin : The voltage changes from 1.2V to 3.3V
when playing audio content
45pin : Lo
Controlled as normal
Check the Audio Line of ANALOG IN.
MAIN PCB
[P1 : 1, 3pin] → [U17 : 4, 11pin]
No sound is output from the BLUETOOTH input
source
Check the Audio signal Line of [U13] output.
MAIN PCB
[U13 : 1, 7pin] → [U17 : 5, 14pin]
Check the Audio Line of [U13] output.
MAIN PCB
[U15 : 54, 55, 56, 57pin]
Audio signal is output as normal
Check the circuits around [U13]. If there are no
abnormalities, there may be a defect in [U13]
MAIN PCB
Check the connection of [U10 : 44, 51, 55, 52, 50,
56, 54pin].
Go to "6.4.3. Abnormality in ANALOG IN"
Check the circuits around [U15]. If there are no
abnormalities, there may be a defect in [U15].
(Change the MAIN PCB)
NO
NO
NO
NO
YES
YES
YES
YES
Before Servicing
This Unit
Electrical Mechanical Repair Information Updating
43