Block Diagram - Yamaha QY100 Service Manual

DM
1MHz clock out
HOST SELECT
IC22
TO HOST
15
transceiver
IC23
1,3 5
MIDI IN
receiver
IC20
4 1
driver
MIDI OUT
Port
FOOT SW
* Memory access speed
→Requirements speed
Host-sel monitor Battery monitor
P.bat monitor
8.4672MHz
TxD0, RxD0
IC1
RxD1
main CPU
TxD1
SWX00B
Separate mode
input
monitor
ready/busy
monitor
x16
x16
S-bus
x8
x16
IC7
CPU I/F
→
main sub
DRAM
4M/70ns
DSP
OSCLK(192fs)
MELO SYW
IC27
IC25
FlashROM/
SRAM
MaskROM 1M/55ns
64M/110ns
TG_prog 8M TG_work
wave 56M
DSP
x8
x16 x16
x16
C-bus
S-bus
(CN2-5~11,
12~19)
Port x7(SW7x8)
CARD
Res
Bat SMART
Res
MEDIA
Battery backup
Port x3
IC5 IC6
SRAM SRAM
1M/110ns 1M/110ns
Smart Media
main work user data
I/F
x8 Res Res
x8
x8
x5
C-bus
x16 x16
IC4
IC10
IC3
FlashROM/
FlashROM
MaskROM
16M/110ns
8M/110ns
main prog
style ready/busy
monitor
IC2
13,14,16
1
ADC
20bit
sub CPU 15
1
SWX00B
Res IC28
dual mode
IC29
11
BCLK,LRCK,Data
DAC
158
18bit
13
163
15
5
164
16
x16
x52
PN
(CN2-4~10,11~19)
LCD UNIT
x3 x1
128 X 64dots
PEAK
(CN1-2)
(CN1-4~19)
(CN1-1~5)
(CN2-3~20)
(CN2-21)
IC8
Res
LCDC
Res
SW I/F LED I/F
x8
x8
4.915MHz
x3
peak
peak
LED
indicate
GAIN
input
monitor
3
1
AMP
IC31
IC30
3
1
AMP
VOLUME
IC30
5
7
AMP
Muting
+10A(+9A)
+VA
Z-diode
5
1
+5D
+5D
SW-Regulator
IC33
+3.3D
+3.3D
P.bat monitor
regulator
IC32
(CN1-7,8)
CONTRAST
IC9
SRAM DC-DC converter
+5V → -10V
256K/80ns
IC24
GUITAR/MIC
INPUT
LINE OUT/
PHONES
DC IN
1.5Vx6
28CA1-8817682