Yamaha NX-A01 Service Manual

Also see for NX-A01 - Speaker Sys: Product bulletin Owner's manual Owner's manual

Contents

NX-A0110NX-A01–––neg.–neg.neg.–neg.neg.neg.––––––neg.–neg.neg.neg.neg.neg.neg.–––neg.––––neg.–pos.––––––––LogicIC501: μPD789022GB-A70-8ES-A (MAIN (2) P.C.B.)Microprocessor1234567891011121314151617181920212223242526272829303132333435363738394041424344P12P11P10P47/KR7P46/KR6P45/KR5P44/KR4P43/KR3P42/KR2P41/KR1P40/KR0NCIC (VPP)X2X1VSS0VDD0/RESETP53P52P51/TO2P50/TI0/TO0P32/INTP2/ CPT2P31/INTP1P30/INTP0P22/RXD/ SI0P21/TXD/ SO0P20/ASCK/ /SCK0P07P06P05P04P03P02P01P00NCVDD1VSS1P17P16P15P14P13I/OI/OI/OI/OI/OI/OI/OI/OI/OI/OI/ONC–ClockClockGNDVDDResetI/OI/OI/OI/OI/O (interrupt)I/O (interrupt)I/O (interrupt)I/O (serial)I/O (serial)I/O (serial)I/OI/OI/OI/OI/OI/OI/OI/ONCVDDGNDI/OI/OI/OI/OI/O(P12)(P11)(P10)AMP_PRT(P46)BT_STATEKEY_POWER(GNDb)KEY_MUTEKEY_VOLDWKEY_VOLUP(GNDb)FLASH_VPP––GNDb+5VbN_RESET(GNDb)N_BTPOWERN_SLEEPPOWERONDET_BTUDET_PWDN(INTP0)FLASH_SDIFLASH_SDOFLASH_SCKN_MUTE(GNDb)VOL_CEVOL_DIVOL_CLN_BTRESET(GNDb)N_LED_POWER(GNDb)+5VbGNDb(GNDb)(GNDb)(GNDb)(GNDb)(P13)for firmware version check (P12)for firmware version check (P11)for firmware version check (P10)detection of YDA138 amplifier-protection(reserved. must be pulled-up to VDD0.)POWER key inputMUTE key inputVOLUME DOWN key inputVOLUME UP key inputclock inputpower supplyreset input(reserved. test signal output.)YDA138 sleep controlPowerOn/standby controldetection of AC power-offOR input of KEY_POWER and BT_STATEserial data from PCB inspection machineserial outputserial clock from PCB inspection machineMUTE controlelectrical volume chip enableelectrical volume data inputelectrical volume serial clockcontrol output of POWER LEDpower supplyfor firmware version check (P13)No. Pin name Function Signal name Comment–––PU (100K)PU (100K)PU (100K)PU (100K)–PU (100K)PU (100K)PU (100K)––––––PU (100K)–PU (100K)PD (100K)–PU (100K)PU (100K)PU (100K)PU (100K)–PU (100K)PD (100K)–––––––––––––––Pull-Up/DownOOOIIII–III–––I––IOOOOIIIIOIO–OOOO–O–––––––OI/O