Marantz SR7010 Service Manual page 112

5.3. Cannot recognize the connected USB device
Is a USB hub being used?
Is the USB device supported by this unit?
Are CN321 of the DIGITAL PCB and BN321 of the USB PCB cor-
rectly connected?
Can a voltage (5V) be confirmed between pin 1 and pin 4 of
JK604 (USB Connector) on USB PCB?
The USB signal circuit between CY920 and JK604 of the USB PCB
are faulty.
5.4. No picture or sound is output
Are digital video signals(920PCK, 920VD0 - 920VD7) output from
CY920 to IC421 (V.PLD)?
Check the VIDEO circuit.
Are the I2S signal output to pins 26, 28, 30 and 34 of the CN501
DIGITAL PCB ?
(The 30, 32, 34pin in the case of DSD)
Are audio signal output to pin 85 of IC221 (A.PLD) on DIGITAL
PCB.
Check the IC251 (DSP) AUDIO circuit and the circuits thereafter.
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 FAT32-formatted
NO
mass storage class, MTP-compatible devices and iPod devices
(except for some models).
NO
Connect the connectors correctly.
NO
The circuit around IC503 of the DIGITAL PCB is faulty.
NO
The circuit around CY920, IC421 (V.PLD) is faulty.
NO
The circuit around CY920 is faulty.
NO
The circuit around IC221 (A.PLD) is faulty.
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