Sony XR-4950X Service Manual page 30

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Pin Name
Pin No.
74 E2P_SIO
75 E2P_CKO
76 NCO
77 SWSHIFT
78 DOORSW
79 DOORIND
80 REIN1
81 REIN0
82 AD_ON
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L 13942296513
83 ILLON
84 REL
85 POS3
86 POS2
87 POS0
88 POS1
89 LMLOD
90 LMEJ
91 TAPON
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92 CM ON
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I/O
EEPROM communication terminal
I/O
EEPROM data input/output terminal
EEPROM communication terminal
O
EEPROM clock output terminal
O Not used
AM filter control terminal
Outputs "L"during 2.94 to 5.585, 14.125 to 18.135 MHz during SW reception, and
O
outputs "H" at other times
Front panel open/close detection input
I
Panel is closed when "L"
DOOR indicator output terminal
"H" is output when DOORSW is "H"
O
"L" is output when NOSESW is "H"
I
Rotary encoder input terminal
I
AD conversion power supply control output
When the KEYACK terminal for controlling the AVREF power supply to input key AD
O
conversion inputs is active, "L" is output from this terminal to set the input possible state
Illumination power supply control output
Output control terminal of the power supply for illumination of functions keys, etc.
Depends on pressing the OFF key for two seconds to turn it off
OFF key normally off, etc
Accessory power supply detection output input (ACCIN)
O
Pressing the OFF key for two seconds to turn it off, etc
System power supply control output (PW ON)
When on output= "H" output
When off output= "L" output
Reel table rotation detection input
I
Used for detecting tape end using the terminal for detecting tape rotation
I
I Position signal detection input
I Terminal for detecting tape position Connected to MD
I
Loading motor control output (Loading direction)
O
Rotates the loading motor in the normal direction using the tape control terminal
Loading motor control output (Ejection direction)
Rotates the loading motor in the reverse direction using the tape control terminal
O
Becomes active together with LM and LOD, and brakes the loading motor
TAPE power supply control output
Capstan motor control output
Loading motor control output (Loading direction)
O
Loading motor control output (Ejection direction)
Outputs on when one of the above three ports is active
At other times, does not depend on off output and power output
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y
TAPE capstan motor control signal output terminal
i
Normally, linked with TAPON Outputs LOW when paused at TAPE BEHIND to stop the
O
motor
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2 9
8
Function
Q Q
3 6 7 1 3 1 5
active ...... on output
Inactive ...... off output
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9 4 2 8
active ...... on output
0 5 8 2 9 9 4 2 8
Inactive ...... off output
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9 9
9 9