Sony HCD-MD5, Service Manual, Page: 61 / 101

– 115 –
Pin No. Pin Name I/O Function
80 AMUTE O Line out muting output
81 LDOUT O
82 LDIN O
Loading motor (M191) control output *1
83 REC SW I Detect input from the chucking switch (S193). When chucked: “L”.
84 PLAY SW I Loading In switch (S192) detect input “L” at a position where the magnetic head lowers. Others: “H”.
85 OUT SW I Loading Out switch (S192) detect input “L” at a loading out position. Others: “H”.
86 PROTECT I Rec-proof claw detect input from the protect detect switch (S102-1). When protected: “H”.
87 REFLECT I Disc reflectance ratio input from the reflect detect switch (S102-2). Low reflectance ratio disc: “H”.
88 LIMIT IN I Detect input from the limit switch (S101). Sled limit in: “L”
89 CTS O UART data transmission request signal output to the µPD78058GC (IC501).
90 RTS I UART data transmission request signal input from the µPD78058GC (IC501).
91 TXD I UART data input from the µPD78058GC (IC501)
92 RXD O UART data output to the µPD78058GC (IC501)
93 — O
94 — O
Not used (Connected to ground).
95 — O
96 — O
97 AVSS (AGND) — Ground
98 VREF (+5V) I Reference voltage input (+5V)
99 TIMER REC/PLAY I
100 INPUT SELECT I
Not used (Connected to ground).
*1 Loading motor control
Operation
IN OUT Brake
Pin
LDIN (Pin
*™
) “H” “L” “H”
LDOUT (Pin
*¡
) “L” “H” “H”