Circuit Diagram - Yamaha DGX-220 Service Manual

A B C
<Page1>
I DGX-220/YPG-225 OVERALL CIRCUIT DIAGRAM (DMLCD)
1
DMLCD
2
LCD DRIVER
3
4
NC
5
6
7
8
to USB(AMJK 3/6) CN-854
9
（セ） ：Ceramic Capacitor
I WARNING
10
Components having special characteristics are marked
must be replaced with parts having specification equal to those originally installed.
DGX-220/YPG-225
Note: See Parts list for details of circuit board component parts.
A B C
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D E
LCD
Not installed
RESET
CPU+XG
USB CPU
DAC
ADC
Not installed
Not installed
Not installed
to MK-76L CN-4
<Page2 H-9> <Page2 G-4>
and
D E
manuals search engine
F G H
Not installed
4M DRAM
2.7V: ±1.2VP-P
DAC Max. output
±1.375VP-P
OP AMP
Fc=27KHz, Gain +6dB
F G H
I J K
Not installed
LED DRIVER
Not installed
Not installed
Not installed
Not installed
64M MASK ROM
(PROG/WAVE)
4M FLASH ROM
Not installed
DECODER
NC NC to MK-76L CN-5 to MK-76H CN-1
<Page2 G-5> <Page2 G-3>
ï RH5RZ50CA-T1-F (X6959A00)
REGULATOR +5V
DMLCD:IC101
1
2
3 1. GND
2. INPUT
3. OUTPUT
I J K
L M N
DGX-220/YPG-225
to PNL(PN 3/5) CN-784
<Page2 B-6>
NC
Not installed
Not installed
to PNR(PN 1/5) CN-781
<Page2 B-2>
to USB(AMJK 3/6)
<Page 2 H-8>
REGULATOR
+5V
REGULATOR
+3.3V
REGULATOR
+2.5V
Not installed
to AM(AMJK 1/6) CN-155
<Page2 J-7>
28CC1-2001002838 2
BA33BC0FP (X5889A00) RH5RZ25CA-T1-F (X3679A00)
REGULATOR +3.3V REGULATOR +2.5V
DMLCD: IC102 DMLCD:IC103
2
1
1
2
3
1. INPUT 1. GND
3
2. INPUT
2. GND
3. OUTPUT
3. OUTPUT
DGX-220/YPG-225
L M N
O
1
2
3
4
5
6
7
8
9
10
O