Sony PMC-MD55 - Md Boombox, Руководство по обслуживанию

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MAIN BOARD IC405 CXP740096-032Q (SYSTEM CONTROLLER)
Pin No. Pin Name I/O Description
1 MD O Function select signal output for the MD playback signal “L”: MD, “H”: other function
2 RADIO/LINE O
Function select signal output for the tuner/line input signal
“L”: tuner/line in, “H”: other function
3 AC-CHK I AC power supply detection signal input “L”: AC in
4 to 6 NC
— Not used (open)
7 RDS-DATA I
RDS serial data input from the RDS decoder Used for the AEP, UK models
(US, Canadian models: not used (fixed at “L”))
8 NC
— Not used (open)
9 RDS-CLK I
RDS serial data transfer clock signal input from the RDS decoder Used for the AEP, UK models
(US, Canadian models: not used (fixed at “L”))
10 CD-TURN
I
CD lid start closing detection signal input “H”: start closing
11 M/B O MEGA BASS on/off control signal output “L”: MEGA BASS on
12 CD-OPEN O CD lid open/close motor (M703) drive signal output “H”: during CD lid open
13 CD-CLOSE O CD lid open/close motor (M703) drive signal output “H”: during CD lid close
14 to 16 NC
— Not used (open)
17 MD-H O MD play control signal output to the A/D, D/A converter (IC603) “L”: MD playback mode
18 REC-H O MD rec control signal output to the A/D, D/A converter (IC603) “L”: MD recording mode
19 MD-RST O
Power supply on/off control signal output for the MD mechanism controller (IC601)
“H”: power on
20 MD-SCTS O System controller busy status monitor output to the MD mechanism controller (IC601)
21 MD-SRTS I MD mechanism controller busy status monitor input from the MD mechanism controller (IC601)
22 MD-PDOWN O Power down signal output to the MD mechanism controller (IC601) “L”: power down
23 D/L CON O CD disc illumination lamp (PL550) drive signal output “H”: lights up
24 LCD-RST O Reset signal output to the liquid crystal display (LCD500)
25 LCD-CE O Chip enable signal output to the liquid crystal display (LCD500)
26 LCD-AO O Address signal output to the liquid crystal display (LCD500)
27 LED-MD O LED drive signal output of the
fl
MD indicator (D550) “H”: LED on
28 LED-RADIO O LED drive signal output of the BAND TUNER indicator (D552) “H”: LED on
29 LED-CD O LED drive signal output of the
fl
CD indicator (D551) “H”: LED on
30 NC — Not used (open)
31 RADIO-POWER O Tuner system power supply on/off control signal output “L”: power on
32 CD-POWER O CD servo system power supply on/off control signal output “L”: power on
33 HI-LED O LED drive signal output of the HIGH SPEED indicator (D555) “H”: LED on
34 CD-12HISP O CD spindle motor control signal output
35 to 38 NC — Not used (open)
39 TU-SFT O Level shift of the main system clock control terminal
40 RST
I
System reset signal input from the reset signal generator (IC404) “L”: reset
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”
41 VSS — Ground terminal
42 XTAL I Main system clock input terminal (8 MHz)
43 EXTAL O Main system clock output terminal (8 MHz)
44 SELECT-GND I Destination setting terminal Fixed at “H” in this set
45 HP-SW I Headphone plug in/out detection input “L”: plug in
46 LCD-DATA O Serial data output to the liquid crystal display (LCD500)
47 LCD-CLK O Serial data transfer clock signal output to the liquid crystal display (LCD500)
48 CD-DOOR I Detection signal input from the CD lid open/close detect switch (S761/762)
49 JOG-A I Jog dial pulse input from the rotary encoder (S556) (A phase input)
50 JOG-B I Jog dial pulse input from the rotary encoder (S556) (B phase input)