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Sony HCD-GRX50 - IC Pin Function Descriptions; MAIN BOARD IC501 Pin Function Details (Final)

Sony HCD-GRX50
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– 69 –
Pin No. Pin Name I/O Function
74 CAPM-CNT2 O
Capstan motor (M1) drive signal output terminal “H” active *3
75 CAPM-CNT1 O
Capstan motor (M1) drive signal output terminal “H” active *3
76 CAP-M-H/L O
High/normal speed selection signal output of the capstan motor (M1)
“L”: normal speed, “H”: high speed
77 AMS-IN I
Whether a music is present or not from HA12215F (IC301) is detected at automatic music sensor
“L”: music is present, “H”: music is not present
78 TC-MUTE O
Line muting on/off selection signal output to the HA12215F (IC301)
“L”: muting off, “H”: muting on
79 R/P-PASS O
Recording/playback/pass selection signal output to the HA12215F (IC301)
“L”: recording mode, “H”: pass, “Hi-z”: playback mode
80 NR-ON/OFF O
Dolby NR on/off selection signal output to the HA12215F (IC301)
“L”: dolby off, “H”: dolby on
81 REC-MUTE O
Recording muting on/off selection signal output to the HA12215F (IC301)
“L”: muting on, “H”: muting off
82 BIAS O
Recording bias on/off selection signal output to the HA12215F (IC301)
“L”: bias off, “H”: bias on
83 EQ-H/N O
Normal/high speed selection signal output to the HA12215F (IC301)
“L”: normal speed, “H”: high speed
84 PB-A/B O
Deck-A/B selection signal output to the HA12215F (IC301) “L”: deck-A, “H”: deck-B
85 ALC-ON/OFF O
Automatic limiter control signal output to the HA12215F (IC301) “L”: limiter on
86 B-PLAY-SW I
Detection input from the deck- B play detect switch (S1002) “H”: deck-B play
87 A-PLAY-SW I
Detection input from the deck- A play detect switch (S1001) “H”: deck-A play
88 A-HALF I
Detection input from the deck-A cassette detect switch (S1003)
“L”: cassette in, “H”: no cassette
89 B-HALF I
Detection input from the deck-B half detect switch (S1006)
90 B-SHUT I
Shut off detection signal input from the deck-B side reel pulse detector (IC1002)
91 A-SHUT I
Shut off detection signal input from the deck-A side reel pulse detector (IC1001)
92 SOFT-TEST O
Output terminal for the software test (open)
93
HEADPHONE
MUTE
O
Muting on/off control signal output terminal “L”: muting on Not used (open)
94 KEY/CD ADJ I
Setting terminal for the CD adjustment mode Not used (open)
95 MODEL-IN I
Destination setting terminal
96 AVSS
Ground terminal (for A/D conversion)
97 SPEC-IN I
Setting terminal for the version
98 AVREF I
Reference voltage (+5V) input terminal (for A/D conversion)
99 AVCC
Power supply terminal (+5V) (for A/D conversion)
100 TC-RELAY O
Recording/playback select signal output to the REC/PB switch (IC602)
“L”: playback, “H”: recording
*3 Capstan motor (M1) control
Stop
Forward
Direction
Reverse
Direction
Brake
CAPM-CNT1 (pin &∞)
“L” “L” “H” “H”
CAPM-CNT2 (pin )
“L” “H” “L” “H”
Terminal
Mode

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