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Connect AC Co
r
d fr om D7050
IS AMBE R LED LIGH T
E
D?
PRESS ST
B T
OUCH KEY
MAKE
THE
U
NIT WORK NORMALLY ?
NO
YES
IS LED RED?
CHECK THE
LED CONTROL CIRCUIT
,
AND
PROTECET
CIRCUIT
YES
IS LED WHIT E?
CHECK TOUCH BOARD
,
OR
SOFTWARE
E
R
ROR
YES
NO
CHECK THE
5V
SUPPLY
CIRCUIT
NO
NO
IS ALL POWE
R
SUPPLIES OK?
NO
YES
IS MOSFET
BROKEN?
CHECK THE
OVC& VOV CIRCUIT
NO
IS IR NORMA L?
IS BLUE
T
OOTH
NORMAL?
IS AIR PLAY NORMAL?
IS 12V
T
RIGGE
R
NORMAL?
IS PREOUT
NORMAL?
OK
YES
YES
YES
YES
YES
YES
NO
CHECK BLUETOOTH CIRCUIT
NO
CHECK AIRPLAY SUPPLIES
NO
CHECK TRIGGER CIRCUIT
NO
CHECK CONNECTER
TROUBLE SHOOTING GUIDE
10
Содержание D 7050
Страница 1: ...NAD SERVICE MANUAL D7050 Direct Digital Network Amplifier D7050 Direct Digital Network Amplifier...
Страница 27: ...Top Layer 1 AMP BOARD VM1 2 PCB LAYOUT 26...
Страница 28: ...1 AMP BOARD VM1 2 Bottom Layer 27...
Страница 29: ...Top Layer Bottom Layer 2 BLUETOOTH BOARD VM1 2 3 TOUCH BOARD VM1 2 Top Layer Bottom Layer 28...
Страница 30: ...4 FPP BOARD VM1 2 5 VOLUME ENCODE BOARD VM1 2 Top Layer Bottom layer Top Layer Bottom Layer 29...
Страница 31: ...6 SOURCE ENCODE BOARD VM1 2 Top Layer Bottom Layer 7 HEADPHONE BOARD VM1 2 Top Layer Bottom Layer 30...
Страница 32: ...8 INT BOARD VM1 2 Top Layer Bottom Layer 31...
Страница 33: ...9 PSU BOARD VM1 2 Top Layer Bottom Layer 32...