Sharp SD-AT50H, Service Manual

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SD-AT50H
IC701 RH-iX0564AWZZ: System Microcomputer (IX0564AW)
1 D3 A/D_RESET Output Output of 1 bit AMP
∆∑
IC reset control.
“H” output : normal operation, reset when switching from “L” to “H”.
2* D4 N.C. Output Open terminal. “L” is output, PWB is open.
3 D5 SP_RLY Output Speaker relay output. (For all the speakers)
“H” output : relay ON, electric conduction, “L” output : relay OFF
4 D6/CNTR0 BASS_SW Output Output for controlling the gain of SUBWOOFER amp.
“H” output : BASS OFF, “L” output : BASS ON
5 D7/CNTR1 AC_DETECT Input Power failure check with the voltage after the AC rectification.
Normal : “L”, power failure detection when switching from “L” to “H”.
6 P20/SCK AMP_CLK Input Clock input for communication with the system microcomputer.
Serial auto send/receive.
7 P21/SOUT AMP_SIN Output Data output to the system microcomputer. Serial auto send/receive.
8 P22/SIN AMP_SOUT Input Data input from the system microcomputer. Serial auto send/receive.
9 RESET RESET Input Reset input for this microcomputer. Active “L”.
10 CNVSS CNVSS Input 0 V (GND).
11 XOUT XOUT Output Reference oscillation output for this microcomputer.
2 MHz ceralcok connection.
12 XIN XIN Input Reference oscillation input for this microcomputer.
2 MHz ceralcok connection.
13 VSS VSS Input GND terminal.
14 VDD VDD Input Positive power supply terminal.
15 VDCE VDCE Input Control of the operation and stop of voltage drop detect circuit.
Used in the stop status (connected to GND).
16 P30/INT0 AMP_INT Output Communication request signal to the system microcomputer.
Request when switching from “H” to “L”.
17 P31/INT1 POWER_ON Input SW input for POWER ON/OFF test mode.
“H” : normal status, “L” : TEST mode ON/OFF
18 AIN0/CMP0- +B_CHECK Input Power rise monitoring input.
Decision of the reset timing of 1 bit AMP.
19 AIN1/CMP0+ PROTECT Input A/D import, system abnormality detect input.
20 AIN2/CMP1- FAN_CHK Input A/D import, FAN motor rotation detect input.
21 AIN3/CMP1+ FAN_LOCK Input A/D import, FAN motor lock detect input.
22 P00 F_S_MUTE Output Front speaker S-MUTE output.
“H” output : MUTE-ON, “L” output : MUTE-OFF.
23 P01 C_S_MUTE Output Center speaker S-MUTE output.
“H” output : MUTE-ON, “L” output : MUTE-OFF.
24 P02 S_S_MUTE Output Surround speaker S-MUTE output.
“H” output : MUTE-ON, “L” output : MUTE-OFF.
25 P03 W_S_MUTE Output Subwoofer speaker S-MUTE output.
“H” output : MUTE-ON, “L” output : MUTE-OFF.
26 P10 AMP_STB Input Communication request signal from the system microcomputer.
Request when switching from “H” to “L”.
27 P11 — Input PULL_UP
28 P12 SYS_STOP Input Power failure detect input. This microcomputer switches to the backup mode.
Normal : “H”, power failure detection when switching from “H” to “L”.
29 P13 OFF_SET Input Abnormality detection output of 1 bit AMP
∆∑
IC output offset voltage.
L : abnormal
30 D0 UNSW_CHK Input Power rise timing control. The power is not risen in “L”.
31 D1 POWER Output Output of power supply control.
“L” output : POWER ON, “H” output : POWER OFF.
32 D2 -B_CONT Output Control output for - B power supply control relay of 1 bit AMP section.
“L” output : relay ON, -B supply “H” output : relay OFF
Terminal Name
Pin No.
Input/Output Function
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
Port Name