Sony XR-4950X Service Manual page 29

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Pin Name
Pin No.
41 UNICLI
42 UNISO
43 UNISI
44 UNICKO
45 I2C_SIO
46 VOLATT
47 I2_CKO
48 AMPON
49 AMPATT
50 ATT
TE
L 13942296513
51 TU_ATT
52 AMSON
53 NROUT
54 MTLON
55 TAPATT
56 DOLON
57 AMSIN
58 4VPRE
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59 to 69
70 to 73 NCO
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I/O
Serial clock input
I
UNI-LINK serial interface clock input terminal
Serial data output
O
UNI-LINK serial interface data output terminal
Serial data input
I
UNI-LINK serial interface data input terminal
Serial clock output
O
UNI-LINK serial interface clock output terminal
2
I C bus serial data input/output
I/O
Serial interface with electronic volume IC, TUX-020
Electronic volume mute control output terminal
O
Mute terminal for electronic volume
I 2 C bus serial clock output
O
Serial interface with electronic volume IC, TUX-020
Power amplifier STANDBY control output
O
Performs standby on/off control of the power amplifier and power IC
Power amplifier mute control output terminal
O
Mute terminal during AMPON output ON/OFF
System MUTE control output
Mute control output of audio signal line output stage
Set the electronic volume also to - ∞ during active
O
Outputs "H" when mute is ON
Immediately sets into the input state during BU-INOFF
Tuner mute control output terminal
O
Controls FM and AM outputs from TUX
O Outputs "L" during AMS
FOR/REV control output
Controls tape running direction
O
Outputs "H" in the forward direction and "L" in the reverse direction
Metal control input/output
Switches between metal on/off MTL is present when initial "L" is input
I/O
Outputs "H" during MTL ON
Tape mute control output
FF and REW are active during ATA operations
O
Outputs "H" during mute on when the EQ IC is connected
Dolby control input/output
Sets the presence/absence of the Dolby function during the input mode during initialization
I/O Switches DOLBY to on or off in the output mode normally
DOLBY is on when "L" is input Outputs "H" during DOLBY ON
Sound presence/absence detection input during AMS
Detects if tape audio sound is present or absent
I
Sound is present when "L" is input and absent when "H" is input
4VPREOUT model acknowledge terminal
Acknowledges as 4VPREOUT model when "L", and changes the gain amount of the
I
electrical control IC
O Not used
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O Not used
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Function
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