Marantz SR5009/U1B Service Manual page 88

5.3. A connected USB device is not recognized.
Is a USB hub being used?
Is the USB device supported by this unit?
Are CN4402 of the 870JUNCTION PCB and N7000 of the USB PCB
correctly connected?
Can a voltage (5V) be confirmed between pin 1 and pin 4 of JK4400
(USB Connector) on USB PCB?
The USB signal circuit between CX870 and JK4400 of the USB PCB
are faulty.
5.4. No picture or sound is output
Are digital video signals((920PCK, 920VD0 - 920VD7)) output from
CX870 to U1045(V.PLD)?
•Check the VIDEO circuit of U1026 (ADV8003) or later.
Are I2S signal output to pin 26, 28, 30, 34 of the U1008 HDMI PCB ?
(The 30, 32, 34pin in the case of DSD)
Are audio signal output to pin 8 of U1041(A.PLD) on HDMI PCB.
Check the AUDIO circuit of U1024(DSP) or later.
Check the USB device being used
NO
YES
Checking the unit
YES
YES
Checking the unit (If no picture is output)
YES
Checking the unit:(If no sound is output)
YES
YES
YES
Do not use a USB hub.
This unit supports devices in the FAT16 and
NO
FAT32-formatted mass storage class, MTP-
compatible devices and iPods (with the
exception of some models).
NO
Connect the connectors correctly.
NO
The circuit around U7000 of the 870JUNC-
TION PCB is faulty.
NO
The circuit around CX870, U1045(V.PLD) is
faulty.
NO
The circuit around CX870 or CX870JUNCTION PCB
is faulty.
NO
The circuit around U1041(A.PLD) is faulty.
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