HBD-E385, HBD-E390, HBD-T39 - Sony Audio Service Manual (repair manual). Page 68

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HBD-E385/E390/T39
68
Pin No.
Pin Name
I/O
Description
R11
DGND12_K
-
Digital ground
R12
DGND12_K
-
Digital ground
R13
DGND12_K
-
Digital ground
R14
DGND12_K
-
Digital ground
R15
DGND12_K
-
Digital ground
R16
NO_USE
-
Not used
R17
DVCC12_K
-
1.2V digital power
R18
NO_USE
-
Not used
R19
NO_USE
-
Not used
R20
DDRVCCIO
-
1.5 V digital IO power
R21
NO_USE
-
Not used
R22
RDQM1_B
O
Memory data mask bit 1
R23
RDQM0
O
Memory data mask bit 0
R24
RDQ10
I/O
Memory data bit 10
R25
NO_USE
-
Not used
T1
FEEJECT_
I/O
Eject / stop kep input, active low. 
The pin is spike-free at power-on stage. 
Alternative function: General IO
T2
FE_TRAYIN_
I/O
Tray_is_in Input, A Logical Low Indicates the Tray is IN.
Feedback Flag is from Tray Connector. The pin is spike-free at power-on stage.
Alternative function: General IO
T3
FEGIO10
I/O
PC RS232 serial receive data. The pin is spike-free at power-on stage.
T4
NO_USE
-
Not used
T5
NO_USE
-
Not used
T6
NO_USE
-
Not used
T7
NO_USE
-
Not used
T8
NO_USE
-
Not used
T9
DVCC12_K
-
1.2V digital power
T10
NO_USE
-
Not used
T11
DVCC12_K
-
1.2V digital power
T12
DVCC12_K
-
1.2V digital power
T13
NO_USE
-
Not used
T14
DVCC12_K
-
1.2V digital power
T15
NO_USE
-
Not used
T16
DVCC12_K
-
1.2V digital power
T17
DVCC12_K
-
1.2V digital power
T18
DDRVCCIO
-
1.5 V digital IO power
T19
RVREFO
I
Memory VREF
T20
NO_USE
-
Not used
T21
DGND12_K
-
Digital ground
T22
RDQ9
I/O
Memory data bit 9
T23
RDQ8
I/O
Memory data bit 8
T24
RDQ11
I/O
Memory data bit 11
T25
NO_USE
-
Not used
U1
FEGIO11
I/O
PC RS232 serial transmit data. The pin is spike-free at power-on stage.
U2
FEGIO3
I/O
LED Control Output. Initial 0 Output. The pin is spike-free at power-on stage.
General IO
U3
USB_VRT
O
USB reference resistor
U4
FETRAYOUT_
I/O
Tray_is_in Input, A Logical Low Indicates the Tray is OUT.
Feedback Flag is from Tray Connector. The pin is spike-free at power-on stage.
Alternative function: General IO
U5
NC
AMUTE
I/O
Multiple function:
(1) 1st Audio DAC mute
(2) GPIO
U6
DGND12_K
-
Digital ground
U7
NO_USE
-
Not used
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