Trouble Shooting; Oled Dosen't Light; Cannot Connect To Network - Denon DNP-720AE Service Manual

TROUBLE SHOOTING

1. OLED dosen't light

q Check the Power Supply Voltages for OLED.
DISPLAY B'D
• +3.3V_D1, [CP402] : 27pin
w Check the Power Supply Voltages for OLED.
DISPLAY B'D
• +16V_D1, [CP402] : 2, 30pin
Check the communication signal for OLED.
DISPLAY B'D
• [CP402] : 6 - 20pin

2. Cannot connect to network

2.1. First Setup dosen't operate normally
Check the Power Supply Voltages for CX870.
CX870 UNIT
• NET3.3V, [U100] : 3pin
• NET1.2V, [U100] : 10pin
• NET1.9V, [U100] : 9pin
Check the communication signal for CX870.
MAIN B'D
• [U100] : 19, 25, 27, 29, 31, 45pin
Check the communication signal for Wired.
MAIN B'D
• ETH_RX±, TX±, [U100] : 57 - 60pin
Wireless
Check the connection of the antenna cable.
• CON2
YES
YES
d
YES
YES
Wired
YES
Check the voltage of each part.
MAIN B'D
NO
1. [CP106] : 26pin
2. [IC106] : 1, 2pin
SMPS B'D
3. [J1] : 7pin
Check the voltage of each part.
DISPLAY B'D
1. [IC400] : 1pin
NO
MAIN B'D
2. [CP106] : 29pin
SMPS B'D
3. [J1] : 5pin
NO Check the waveform of each part.
MAIN B'D
1. [IC113] : 25 -37pin
Check the voltage of each part.
MAIN B'D
1. [IC121] : 1pin
NO
2. [IC119] : 1pin
3. [IC122] : 1pin
4. [Q115] : 2pin (base) ("H" : OK)
SMPS B'D
5. [J1] : 9pin
NO
Check the waveform of each part.
MAIN B'D
• [IC113] : 55, 54, 53, 52, 46, 43pin
NO
Check the waveform of each part.
MAIN B'D
1. [JACK102] : 1, 2, 3, 6pin
19