Sony HCD-MJ1, Service Manual

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Pin No. Pin name I/O Description
80 AMUTE O Line out muting signal output.
81 LDOUT O Loading motor (M191) control output. *1
82 LDIN O Loading motor (M191) control output. *1
83 CHKIN I Detection signal input from the chucking in switch (S193). When chucking : “L”
84 INSW I
Detection signal input from the loading in switch (S192).
“L” at the position where the head descends, Others : “H”
85 OUTSW I
Detection signal input from the loading out switch (S191).
“L” at the position of load out, Others : “H”
86 PROTECT I
Rec proof detection signal input from the protect detector switch (S102-1).
When protect : “H”
87 REFLECT I
Disc reflection rate detection signal input from the reflect detector switch (S102-2).
“H” : Low reflection rate disc
88 LIMIT IN I
Detection signal input from the limit in switch (S101).
When sled limit in : “L”
89 232C. 4 O UART data transmission request signal output to mPD78052G (IC301)
90 232C. 3 I UART data transmission reqeust signal input from mPD78052G (IC301)
91 232C. 2 I UART data input from mPD78052GC (IC301)
92 232C. 1 O UART data output to mPD78052GC (IC301)
93–96 O Not used (Fixed at “L”).
97 AVSS (AGND) – Ground terminal.
98 VREF (+5V) I Reference voltage input (+5V)
Timer record /time playback/time OFF selection signal input terminal.
99 TIMER REC/PLAY I When timer recording : “H”, When timer playback : “L”,
When timer OFF : Center point voltage (+2.5V) Not used this set (Fixed at “L”)
100 INPUT SELECT I Analog/digital in selection signal input terminal
When analog in : “L”, When digital in : “H” Not used this set (Fixed at “L”)
* 1 Loading motor control
Mode
IN OUT BRAKE
Terminal
LDIN pin
*™
“H” “L” “H”
LDOUT pin
*¡
“L” “H” “H”