Sony PMC-MD55 - Md Boombox, Service Manual

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Pin No. Pin Name I/O Description
51 SELECT I Destination setting terminal Fixed at “H” in this set
52 AVSS — Ground terminal (for A/D converter)
53 AVREF I Reference voltage (+3.3V) input terminal (for A/D converter)
54 AVDD — Power supply terminal (+3.3V) (for A/D converter)
55 LED-PRESET/AMS O LED drive signal output of the PRESET/AMS indicator (D553) “H”: LED on
56 LED-SELECT O LED drive signal output of the SELECT indicator (D554) “H”: LED on
57 LINE O Function select signal output for the line input signal “L”: line in, “H”: other function
58 LINE-LEVEL O Line in level control signal output “L”: normal, “H”: high
59 KEY4
I
Key input terminal (A/D input)
π
(MD),
fl
MD, BAND RADIO,
fl
CD,
π
(CD),
CD OPEN/CLOSE
6
, LINE/LINE IN keys input (S550 to S555 and S579)
60 KEY3 I
Key input terminal (A/D input) DELETE, TUNE
¿
–
0
, NO CANCEL, EDIT,
YES ENTER, DISPLAY, TUNE +
÷ )
, INSERT keys input (S557 to S564)
61 KEY2 I
Key input terminal (A/D input) VOL +/–, BASS/TREBLE, MEGA BASS, MD EJECT
6
,
MONO/ST REPEAT, AUTO PRESET SHUF/PGM keys input (S565 to S571)
62 KEY1 I
Key input terminal (A/D input) POWER, SLEEP, STANDBY, SYNCHRO REC CD
”
MD,
REC IT TO TOP/END, REC, HIGH SPEED keys input (S572 to S580)
63 R-MUTE
O Muting on/off control signal output for the tuner signal “L”: muting on
64 R-COUNT
I PLL serial data input from the LC72137M (IC2)
65 R-CLK
O PLL serial data transfer clock signal output to the LC72137M (IC2)
66 R-DATA
O PLL serial data output to the LC72137M (IC2)
67 R-CE
O PLL serial chip enable signal output to the LC72137M (IC2)
68 HI-SPEED
O High speed recording on/off control signal output “L”: high speed recording
69 MD-SRXD
I UART communication data input from the MD mechanism controller (IC601)
70 MD-STXD
O UART communication data output to the MD mechanism controller (IC601)
71 to 72 NC —
Not used (open)
74 CD-CLK
O Serial data transfer clock signal output to the CXD3009Q (IC702)
75 CD-XLAT
O Serial data latch pulse signal output to the CXD3009Q (IC702)
76 CD-DATA
O Serial data output to the CXD3009Q (IC702)
77 CD-SENSE1
I Internal status (SENSE) input from the CXD3009Q (IC702)
78 CD-SCOR
I Subcode sync (S0+S1) detection signal input from the CXD3009Q (IC702)
79 CD-SQSO I
Subcode Q data input from the CXD3009Q (IC702)
80 CD-SHORT I
Detection signal input of supplied the power to CD block
81 CD-SQCK O
Subcode Q data reading clock signal output to the CXD3009Q (IC702)
82 CD-MUTE
O Muting on/off control signal output for the CD playback signal “L”: muting on
83 CD-FOK I
Focus OK signal input terminal Not used (open)
84 CD-SENSE2
I Internal status (SENSE) input from the CXA2542AQ (IC701)
85 RMC
I Sircs remote control signal input from the remote control receiver (IC550)
86 TEX
O Sub system clock output terminal (32.768 kHz)
87 TX
I Sub system clock input terminal (32.768 kHz)
88 VSS —
Ground terminal
89 VDD
— Power supply terminal (+3.3V)
90 NC —
Not used (open)
91 CD-XRST
O Reset signal output to the CXA2542AQ (IC701) and CXD3009Q (IC702) “L”: reset
92 NC —
Not used (open)
93 SPEED-L
O CD lid open/close motor (M703) drive signal output “L”: open
94 AU-DATA
O Serial data output to the electrical volume (IC351)