Sony DHC-AZ3DM / DHC-AZ7DM / HCD-AZ3DM / HCD-AZ7DM (serv.man2) Service Manual ▷ View online
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USB
memory
controller
(IC801)
USB
storage
media
USBH_DP
USBH_DN
System
controller
(IC401)
DISPLAY
“ACCESS”
No sound data
for HCD-AZ7DM
“No Audio”
If there are no sound data which can be played by HCD-AZ7DM, the condition
is transferred to System controller (IC801) and “No Audio” is shown on the
display.
display.
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(Note) Hang up of USB circuit
USB
memory
controller
(IC801)
System
controller
(IC401)
DISPLAY
SDRAM
(IC802)
FLASH
MEMORY
(IC803)
USB digital circuit
If there is a problem in USB digital circuit, the USB circuit operation stops. Then,
the display never shows USB related messages.
Ex.) No Media, ACCESS
In this case, please check around the USB digital circuit. (IC801, IC802, IC803)
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1-7. Playback of sound data
USB
memory
controller
(IC801)
System
controller
(IC401)
DISPLAY
SDRAM
(IC802)
USB
storage
media
1
2
3
DAC
(IC804)
Amplifier
circuit
USB connector
on the front panel
on the front panel
By selecting the playback sound data with key input, USB memory controller
starts to read the sound data from USB storage media.
starts to read the sound data from USB storage media.
The sound data from USB terminal is stored in SDRAM (IC802) and decoded to
44.1kHz, 24bit sound data.
44.1kHz, 24bit sound data.
This sound data is output to DAC (IC804) and converted to analog sound.
The analog sound is output to amplifier circuit in HCD –AZ7DM.
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2. Listening to audio files on a
Personal Computer
Please refer to Block diagram on page 40 of HCD-AZ7DM
service manual.
Click on the first or last page to see other DHC-AZ3DM / DHC-AZ7DM / HCD-AZ3DM / HCD-AZ7DM (serv.man2) service manuals if exist.