Sony MZ-E80 Service Manual page 21

MAIN BOARD IC801 RU6915MF-0001 (SYSTEM CONTROLLER)
Pin No. Pin Name
1 THOLD
2 UREG MON
3 VC MON
4 VREF
5 PLAY KEY
6 OPEN CLS SW
7 RMC KEY
8 SET KEY
9 XRESET
10 AVDD
11 AVSS
TYPE0 to
12 to15
TYPE3
16 XOUT
17 XIN
18 SXOUT
19 SXIN
20 COUT
21 VDD
22 VSS
23 HOLD SW
24 XRFSW
25, 26 NC
27 SQSY
28 XINT
29, 30 DBB0, DBB1
31 OPR LED
32 NC
33 ADJUST
34 RMC VCON
35 SBUS CLK
36 SBUS DATA
37 LD ON
38 SLD 1 MON
39 SLD 2 MON
40 AVDD
41 VPP
42 CLV VCON
43 APC REF
44 V28 CON
45 CLV U MON
I/O
I Two shaft device tracking coil-end voltage monitor input terminal (A/D input)
I Un-regulator power supply voltage monitor input terminal (A/D input)
I VC (middle point voltage) power supply voltage monitor input terminal (A/D input)
I Input terminal for power supply voltage adjustment reference voltage (+2V) (A/D input)
I Not used (fixed at "H")
Upper panel open/close detect switch (S801) input terminal (A/D input)
I
"L": upper panel close, "H": upper panel open
I Remote commander with headphone key input terminal (A/D input)
Set key input terminal (A/D input) S804 to S808 (p, + /(, =, +/–VOLUME keys input)
I
System reset signal input from the MPC1830ADTB (IC901) "L": reset
I
For several hundreds msec. after the power supply rises, "L" is input, then it changes to "H"
—
Power supply terminal (+2.4V) (for A/D converter)
—
Ground terminal (for A/D converter)
I Setting terminal for model discrimination (bit0 to bit3) Fixed at "L" in this set
O Main system clock output terminal (16.9344 MHz)
I Main system clock input terminal (16.9344 MHz)
O Sub system clock output terminal Not used (open)
I Sub system clock input terminal Not used (fixed at "L")
O Not used (open)
—
Power supply terminal (+2V) (digital system)
—
Ground terminal (digital system)
I HOLD switch (S802) input terminal "L": hold off, "H": hold on
O Standby control signal output to the CXA2523ATQ (IC501) "L": standby
—
Not used (open)
Subcode Q sync (SCOR) input from the CXD2663GA (IC601)
I
"L" is input every 13.3 msec Almost all, "H" is input
I Interrupt status input from the CXD2663GA (IC601)
I DIGITAL MEGABASS switch (S301) input terminal *1
O OPERATE LED (D801) drive signal output terminal "H": LED on
—
Not used (open)
I Setting terminal for the test mode "L": test mode, Normally: fixed at "H"
O Remote commander power supply voltage select signal output to the DC/DC converter circuit
O SBB serial clock signal output terminal Not used (open)
I/O SBB serial data input/output terminal Not used (open)
Laser diode on/off control signal output to the automatic power control circuit
O
"L": laser off, "H": laser on
I Sled servo timing signal input from the MPC17A55VF (IC551)
I Sled servo timing signal input from the MPC17A55VF (IC551)
—
Power supply terminal (analog system) Not used (open)
—
Test terminal (fixed at "L")
O Spindle servo drive voltage control signal output to the MPC17A55VF (IC551)
O Laser power control signal output terminal Not used (open)
O Power supply voltage adjustment PWM signal output to the MPC1830ADTB (IC901)
I Spindle servo (U) timing signal input from the MPC17A55VF (IC551)
Description
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