Denon DN-F450R, Service Manual, Page: 11 / 67

11
Check power supply from AC adapter.
• TPF103
(+5V)
Check power supply from DC-DC Converter (±8VA).
• TPF113
(+8V)
• TPF114 (-8V)
Check parts.
• IC101
BD9851EFV
• L102,L103 68uH
• TR102 RTR025
• TR103 RZR025
• D102,D103 RSX101M-30
and the surrounding constant.
2. POWER PWB
2.1. The power cannot be turned on
Check system power supply (+3.3V).
• TPF105
(+3.3V)
Check CPU-core power supply (+1.2V).
• TPF106
(+1.2V)
Check parts.
• IC109
NJM2387DL2
• D106 RB051L
• C114 100u/6.3V
and the surrounding constant.
Check parts.
• IC107
BD9130NV
• L101 2.2uH
and the surrounding constant.
Check power supply for audio circuit (±6VA).
• TPF115
(+6V)
• TPF116 (-6V)
Check parts.
• IC103
NJM7806FA
• IC104 NJM7906FA
• C134,C135 22u/50V
and the surrounding constant.
Check parts.
• ZD101
UDZS128
• TR101 RZR025
• C101 10u/50V
• C104 100u/16V
and the surrounding constant.
END
N.G.
(Substrate Name : 8U-210088)
(Substrate Name : 8U-310043)
N.G.
N.G.
N.G.
N.G.
O.K.
O.K.
O.K.
O.K.
O.K.