Denon DNP-720AE Service Manual page 24

3.5. Common part
Check the Power Supply Voltages for DIR.
MAIN B'D
• +3.3V_D1, [IC112] : 7,11,14,19,26,30,43pin
Check the Oscillation waveform.
MAIN B'D
• XOUT, [IC112] : 28pin
→ 24.576MHz
Check Reset signal for DIR.
MAIN B'D
• DIR_RST, [IC112] : 41pin ("H" : OK)
Check the communication signal for DIR.
MAIN B'D
• DIR_CL, CE, DI, DO, [IC112] : 37 - 40pin
Check the audio serial data for DAC.
MAIN B'D
• DIR_DATA, [IC103] : 6pin
Check the communication signal for DAC.
MAIN B'D
• DIR LRCK, [IC103] : 7pin
• DIR MCLK, IC103] : 4pin
• DIR BLCK, [IC103] : 5pin
Check the Power Supply Voltages for DAC.
MAIN B'D
• +5V_A, [IC103] : 11pin
Check the control signal for mute.
MAIN B'D
• A_MUTE, [Q110] : 2pin (base)
Check the audio data output.
MAIN B'D
• Lch, Rch, [JACK100]
A
YES
YES
YES
YES
YES
YES
YES
YES
Check the voltage of each part.
NO MAIN B'D
1. [IC106] : 1, 2pin
SMPS B'D
2. [J1] : 7pin
NO
Check the Soldering.
MAIN B'D
1. [X100]
Check the voltage of each part.
NO
MAIN B'D
1. [IC113] : 68pin
NO
Check the voltage of each part.
MAIN B'D
1. [IC113] : 86 - 89pin
NO Check the voltage of each part.
MAIN B'D
1. [IC112] : 21pin
NO Check the voltage of each part.
MAIN B'D
1. [IC112] : 16, 17, 20pin
Check the voltage of each part.
NO
MAIN B'D
1. [IC101] : 1pin
2. [IC100] : 1pin
3. [Q100] : 2pin (base) ("H" : OK)
SMPS B'D
4. [J1] : 1pin
NO
Check the voltage of each part.
MAIN B'D
1. [IC113] : 97pin
NO Check the signal of each part.
MAIN B'D
1. [IC103] : 9, 10pin
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