Denon DNP-720AE Service Manual page 22

3.2. Optical out
Check the Power Supply Voltages for Optical.
MAIN B'D
• +3.3V_D1, [IC110] : 5pin
Check the audio serial data from Optical.
MAIN B'D
• OPTOUT, [JACK101] : 3pin
Check the S/PDIF.
MAIN B'D
• [IC112] : 5pin
3.3. USB
Are you using a USB hub?
Is the USB device compatible with the set?
Check the Power Supply Voltages for USB.
USB B'D
• VBUS, [JACK400] : 1pin
Check the communication signal for USB .
MAIN B'D
• USB+, [U100] : 38pin
• USB-, [U100] : 40pin
Check the audio serial data from DIR.
MAIN B'D
• CX870_SPDIF, [IC112] : 5pin
YES
YES
NO
YES
YES
YES
YES
A
Check the voltage of each part.
NO
MAIN B'D
1. [IC106] : 1, 2pin
SMPS B'D
2. [J1] : 7pin
Check the waveform of each part.
NO
MAIN B'D
1. [IC110] : 2pin
2. [IC112] : 1pin
NO Check the S/PDIF.
MAIN B'D
• [U100] : 32pin
YES
Don't use the USB hub.
Only mass storage devices in FAT16 or FAT32 format or
NO
MTPcompatible devices and iPod (Remove some models) are
supported.
Check the voltage of each part.
MAIN B'D
NO
1. [IC107] : 1pin
2. [Q107] : 2pin (base) ("H" : OK)
SMPS B'D
3. [J1] : 10pin
Check the waveform of each part.
NO
USB B'D
1. [JACK400] : 3pin
2. [JACK400] : 2pin
NO Check the waveform of each part.
MAIN B'D
1. [U100] : 32pin
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