Marantz HD-DAC1 Service Manual page 42

3.4. USB-A
Check Power Supply
DIGITAL PCB (CUP12688)
• Check the voltage of IC41, IC42, IC43.
• Check the voltage of Q401
33_VCC_USB_A / +5V_VBUS / Q401 EMITTER +1.0V
Check the operation of IC41
DIGITAL PCB (CUP12688)
IC41 (16)pin:RESET is "Hi"?
X401 is the oscillator?
Check the communication of IC11, IC41, IC43.
Check the communication with the USB memory.
(USB memory connection)
DIGITAL PCB (CUP12688)
IC41 (40) (41)pin: Communication waveform is OK? D+, D-
Check the USB AUDIO signal.-1 (USB memory connection)
DIGITAL PCB (CUP12688)
IC41 (16)pin:RESET is "Hi"?
IC41 (35)pin MCK input
IC41(31)pin DATA output
IC41(32)pin BCK output
IC41(34)pin LRCK output
Check the DIR (USB memory connection)
DIGITAL PCB (CUP12688)
Check the voltage of IC42
33_VCC_DIR
Check the DIR input and output (USB memory connection)
DIGITAL PCB (CUP12688)
IC42(12)pin BCK input
IC42(13)pin LRCK input
IC42(14)pin DATA IN input
IC42(17)pin DATA output
IC42(18)pin LRCK output
IC42(19)pin BCK output
IC42(20)pin MCK output
Check the USB-A AUDIO signal.-2(USB memory connection)
DIGITAL PCB (CUP12688)
Check the following terminals
IC11, 55pin (SIGNAL_SEL) : "Hi"
IC11, 40pin (CONT5) :
IC11, 49pin (AUDIO_DSD/PCM) :
Below is the same as DITAL_BLOCK Check the AUDIO signal
output-1
O.K.
48MHz
O.K.
O.K.
22.5792MHz
16BIT
2.8224MHz
44.1kHz
O.K.
O.K.
2.8224MHz
44.1kHz
16BIT
16BIT
44.1kHz
2.8224MHz
22.5792MHz
O.K.
"Hi"
"Lo"
O.K.
O.K.
Check the cable and the connection of the connector.
Check Soldering
N.G.
• IC41, IC42, IC43, CN11
MAIN POWER PART PCB(CUP12689-1)
• BN92
USB A PCB(CUP12687-4)
• BN83, CN84, JK81
N.G.
Check Soldering
• IC41, IC43, X401, IC11
Check the cable and the connection of the connector.
Check Soldering
N.G.
• IC41, IC43
USB A PCB(CUP12687-4)
• BN83, CN84, JK81
N.G.
Check Soldering
• IC24, R202, R454, R450, R451,
R452, R422, R423, R424, R469
Check the cable and the connection of the connector.
N.G.
Check Soldering
• IC42, CN11
MAIN POWER PART PCB(CUP12689-1)
• BN92
N.G.
Check Soldering
• R422, R423, R424, R415, R416, R417, R418
N.G.
Check Soldering
• IC11
42