Sony PMC-DR50, Service Manual

Page: 19 / 54

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r Circuit Boards Location.
JACK board
MAIN board
CPU board
VOL board
DISPLAY board
DSP board
HEAD RELAY board
TC RF board
ASP board
MOTOR board
CONTROL board
AMP IC board
POWER board
SPEAKER board
AMP board
MAIN UNIT-1
MAIN UNIT-2
R-CH SPEAKER UNIT
Pin No. Pin name I/O Description
1 G02 O FL grid drive output.
2 G01 O FL grid drive output.
3 NC – Not used (OPEN).
4 CD SCOR I CD SCOR input.
5 T-COUNT I Tape rotation detect input.
6 P.DOWN IN (BACK UP) I Power ON detect input.
7 TAPE AMS IN I AMS signal input.
8 REMOTE IN I Remote control signal input.
9 FM STEREO IN I FM STEREO signal input.
10 RADIO SHFT CLK O Clock shift signal output.
11 LC72131 CE O Radio PLL IC chip enable output.
12 LC72131 CLK O Radio PLL IC clock output.
13 LC72131 DATA IN I Radio PLL IC data input.
14 LC72131 DATA OUT O Radio PLL IC data output.
15 CXD2589Q XRST O CD system reset output.
16 CXD2589Q XLAT O CD DSP IC command latch output.
17 CXD2589Q CLOCK O Clock output for CD DSP IC.
18 CXD2589Q DATA O CD DSP IC command data output.
19 CD OPEN SW IN I CD tray open switch input.
20 CD CLOSE SW IN I CD tray close switch input.
21 CXD2589Q SENS1 I CD SENS input.
22 BU1924F RCLK IN – Not used (OPEN).
23 BU1924F RADIO DATA IN – Not used (OPEN).
24 BU1924F QUARTY IN – Not used (OPEN).
25 CXD2589 SQCK O Clock output for CD SUB-Q.
26 CXD2589 SQSO I CD SUB-Q input.
27 CXD2589 SENS2 I CD SENS input.
28 AVREF I Reference voltage input (for A/D converter).
29-33 KEY1-5 I Key return signal input.
34 TAPE STATUS I Tape detection input.
35 TAPE MECHA MODE SW I FWD/REV detection input.
36 VER I Destination setting terminal (fixed at “H”).
37 AVSS – Ground.
38 RESET I System reset input.
39 EXTAL I O System clock output (8MHz).
40 XTAL1 I System clock input (8MHz).
41 VSS – Ground.
42 XTAL 32.768kHz I Real clock input (32.768kHz).
43 XTAL 32.768kHz O Real clock output (32.768kHz).
44 VDD – Power supply terminal.
45 VFDP – FL power supply terminal.
46 IN I I Initial setting input.
47 CD OPEN OUT O CD tray open signal output.
48 CD CLOSE OUT O CD tray close signal output.
49 PD3 – Not used (OPEN).
50 PD4 – Not used (OPEN).
SECTION 5
DIAGRAMS
5-1. EXPLANATION OF IC TERMINALS
IC801 CXP82832-022Q (SYSTEM CONTROL, FL DRIVE)
– 21 –
Pin No. Pin name I/O Description
51 SYS MUTE O Mute signal output.
52 TUNER MUTE O Tuner mute signal output.
53 CD MUTE O CD mute signal output.
54 LINE MUTE O Line mute signal output.
55 TAPE REC MUTE O Tape mute signal output.
56 TAPE REC O Tape REC output.
57 TAPE BIAS O Tape REC bias select output.
58 TAPE SOL O Plunger control output.
59 TAPE MECHA VCC OUT O Tape mechanism B+ ON/OFF output.
60 ISS 1 O ISS 1 ON/OFF output.
61 ISS 2 O ISS 2 ON/OFF output.
62 MEGA BASS O Mega bass ON/OFF output.
63 POWER CONT OUT O Power ON/OFF output.
64 SUMMER LED – Not used. (OPEN)
65 SOUND LED O SOUND LED ON/OFF output.
66 DIMMER LED O DIMMER LED ON/OFF output.
67 BH3854 CK O Clock output for electrical volume IC.
68 BH3854 DATA O Data output for electrical volume IC.
69 BH3854 LACH O LACH output for electrical volume IC.
70 RESERVE – Not used (OPEN).
71-88 SEG 1-18 O FL segment drive output.
89 VDD – Power supply terminal.
90-100 G03-13 O FL grid drive output.