Yamaha MM6 · keyboard

Main board

48 components · 17 parts identified · 2 photos. Tap a marked part to see what it is.

10 traced nets on this board are available to technicians. See plans

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Parts on this board

DesignatorPart (number or value)DescriptionPackage
C204-dac vcc +5va
C207-dac vcom output, 1/2 vcc.
C213, C214-audio out
CN501-usb
CN601-lcd interface
CN701-midi uart
CN702-encoder
CN703-to panel right pnr board
CN801-61h keys
CN802, CN803-61l keys
CN901-power & audio
IC101YMW767-VTZx6055a00 CPU and TG. 32-bit RISC processor with integrated digital signal processing (DSP) for sound generation. system controller & audio clock generator.qfp128
IC102S-80136ANMC-JCVreset ic, 3.6v 50ms. marking jcvs
IC202PCM1753dac. Gets input from ssp1.ssop-16
IC203NJM4580E
IC301MR27T12800LLAPIS Semiconductor (formerly OKI) prog/wave P2ROM (Production Programmed ROM)
IC305MR27T12800Lwave p2rom
IC30729L V800BBTC-70Gdata 8m flash rom
IC401MB87S1280YHEssp1 DSP ic, x6363a0
IC402-prog p2rom
IC602MC34063EBcontrast +29v dcdc
IC701SN74AHCT1G08DCKRAND gate, marking bel
IC702SN74AHCT1G08DCKR
IC801UPD789022GBmks key scan mcu
IC901RH5RZ25CA-T1-F+2.5d ldo, marking z25sot89
IC902R1171S331B+3.3d ldo, marking d33 bflHSOP-6J-6
IC903R1172S181B+1.8d ldo, marking b18 bftHSOP-6J-6
L601-330uh
X10116.9344mhz hc49 smd crystal
X5016mhz hc49 smd crystalusb controller crystal
X601FA365lcd controller crystal 40mhz
X801CSTCR5M00G53-R0murata 3-pin smd ceramic resonator 5mhz
-epson lcd controller
-nxp usb controller
-ssp1 dram

Marked, not identified yet: C219, DA501, DA502, DA503, DA504, IC502, R212, R213, R214, R219, R220