Marantz UD9004/U1B - Page 36

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UD9004
2. 8U-37AK53000 (POWER UNIT)
2.1. The power cannot be turned on.
Check FUSE Condition
• FUSE [F101] OPEN?
N.G.
Defect of primary circuit component.
• [D101] (RBV-406H)
• [IC103] (STR-Y6456 (100V system))
(STR-Y6476 (200V system))
• [T101] (SW_TRANS)
and Other Circuits
O.K.
Check +3.3V_NSW output
• Voltage Check
3.3V DC (non-switched) Voltage is O.K.?
[CX151] 13pin output
N.G.
Check Parts and Soldering.
• [IC111] (BA33B00FP)
•[D113〜 D116] (RB521S)
• [T102] (POWER_TRANS)
and Other Circuits
O.K.
Check +5V output
• Voltage Check
5V DC (switched) Voltage is O.K.?
[CX151] 14pin output
N.G.
Check Parts and Soldering.
• [IC111] (BA33B00FP)
•[D113〜 D116] (RB521S)
• [T102] (POWER_TRANS)
and Other Circuits
O.K.
Check CLK_50/60 output
• Voltage Check
[CX151] 12pin output
(AC50Hz 100Hz)
(AC60Hz 120Hz)
N.G.
Check Parts and Soldering.
• [T102] (POWER_TRANS)
• [D108,D109] (RB521S)
• [TR107] (DTC114E)
and Other Circuits
O.K.
ON/STANDBY Input
• Voltage Check
[CX151] 4pin output
※Press "ON/STANDBY" to check.
Normally +3.3V is output
※OK if +3.3V is output even momentarily.
N.G.
Check Parts and Soldering.
• [CX151] (15P-PH)
8U-37AK55000
• [IC853] (R5F364VDNFB)
and Other Circuits
O.K.
Check Power Relay
• Is [RL101] switched?
N.G.
Check Parts and Soldering.
• [TR103] (DTC114E)
• [TR102] (KTC3199)
and Other Circuits
O.K.
Check +24V output
• Voltage Check
24V DC (switched) Voltage is O.K.?
[C160] L102 side output
N.G.
Check Parts and Soldering.
• [IC103] (STR-Y6456 (100V system))
(STR-Y6476 (200V system))
• [T101] (SW_TRANS)
• [IC108] (PC123-Y-22)
• [ZD102] (UDZS8.2B)
• [ZD103] (TL431ACLP)
• [D111] (FME-210B)
• [D104] (SJPX-F2)
and Other Circuits
O.K.