Denon DBP-2012UDCI, Service Manual, Page: 30 / 92

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Check FUSE condition.
・ FUSE [F101]
Check 5.5V_STBY output.
(N104 #13)
※
5.5V ± 5%
Check parts and soldering.
・ [U103] (STR-A6059H)
・
[T102] (AEP-EE16202 (SW_TRANS))
・
[U107] (PC817)
・
[D119] (TL431)
and other circuits.
Check +12V output.
・（ N102 #1 ）
Check +5V_A output.
・（ JP2 #5 ）
Check parts (surrounding) and soldering.
・ SUB POWER UNIT
TROUBLE SHOOTING
1. POWER UNIT
The power cannot be turned on.
Check ON of SMPS
・
Is [Q6/Q7] switched?
Check parts (surrounding) and soldering.
・ [Q101/Q102] (DTS114EUA)
・ [Q104/U105] (2SC2458-Y)
・
[U104/U106] (PC817)
and other circuits.
Check Ps_On input.
(N105 #2)
※ Press the <ON/STANDBY> button to check.
No3.3V is output.
※
OK if +3.3V is output even momentarily.
Check parts (surrounding) and soldering.
・ [N105] (15PIN/FFC/1.0mm)
MAIN UNIT
・ [U16] (CS8966F-PQFP447)
and other circuits.
Check AC_DET signal output.
(N105 #1)
(AC50Hz 50Hz(1.2Vp-p))
(AC60Hz 60Hz(1.2Vp-p))
Check parts (surrounding) and soldering.
・
[D112/D113] (IN4007)
・
[U105] (PC817)
and other circuits.
Defect of primary circuit component.
・
[D101] (RBV1506)
・
[U102] (STR-W6753)
・
[U103] (STR-A6059H)
・ [T101] (AEP-ERL28075 (SW_TRANS))
・ [T102] (AEP-EE16202 (SW_TRANS))
and other circuits.
Check parts (surrounding) and soldering.
・
[U102] (STR-W6753)
・
[T101] (AEP-ERL28075 (SW_TRANS))
・ [U101] (PC817)
・ [D122] (TL431)
・ [D114] (FMEN-210A)
and other circuits.
END
Check +5V_B output.
・（ N104 #8 ）
Check parts (surrounding) and soldering.
・ SUB POWER UNIT
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
YES