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A
B
C
DGX-305 / DGX-505 OVERALL CIRCUIT DIAGRAM 1/2 (DM, AM, MVR, PSW, PB, JACK, TW)
DM
LCD
CONTROLLER
not installed
INVERTER
SYSTEM RESET
to PNR-CN06
Reset time 50mS
Detection voltage 2.7V
to PNL-CN01
not installed
not installed
Use in FLASH rewriting mode.
（FLASH書き換えモード時に使用）
USB CPU
JACK
USB
PB
PITCH BEND
SUSTAIN
LCD CONTRAST
DGX-305 / DGX-505
D
E
F
256K SRAM
DC/DC CONVERTER
not installed
CPU
When resetting
(
)
DAC
RB500V-40 (V2376600)
2A02M (VV731400)
DIODE
2A02GM (V8603100)
DIODE
1
1
2
2
1: ANODE
1: ANODE
2: CATHODE
2: CATHODE
RH5RZ25CA-T1 (X3679A00)
PQ05RD11(XU814A00)
REGULATOR +2.5V
REGULATOR +5V 1.0A
DMLCD: IC102
1
2
3
1: IN
2: OUT
1: OUTPUT
1
2
3
3: GND
2: COMMON
4
4: ON/OFcont.
3: INPUT
（フ）
: Flame Proof Carbon Resistor（不燃化カーボン抵抗）
（マ）
: Mylar Capacitor (マイラーコンデンサー)
: Ceramic Capacitor (セラミックコンデンサー)
（セ）
: Semiconductive Ceramic Capacitor (半導体セラミックコンデンサー)
（半セ）
: Metal Film Resistor (金属被膜抵抗)
金被
G
H
I
BACK LIGHT
LCD
LCD Ass'y
16M DRAM
DATA
8M FLASH ROM
128M P2ROM
not installed
OP AMP
REGULATOR +2.5V
REGULATOR +3.3V
MVR
MASTER VOLUME
PSW
STANDBY/ON
PC2933AT-E1 (X0638A00)
REGULATOR +3.3V
2
1
3
1: V in
DM
2: GND
3: V out
DM
AM , JACK
PB , MVR , PSW , TW
J
K
Model change
（モデル切換）
CPU
DGX-305 DGX-505
OR
CPLD
AM
POWER AMP.
REGULATOR +5V
REGULATOR +5V
: 28CC1-8831385-1
2
: 28CC1-8831385-2
: 28CC1-8831384
2
: 28CC1-8831386
DGX-305 / DGX-505 OVERALL CIRCUIT DIAGRAM 1/2 (DM, AM, MVR, PSW, PB, JACK, TW)
L
M
N
O
DGX-305 / DGX-505
to RELAY-CN01
to SM-CN1
not installed
TW
(L)
TW
(R)
L
TWEETERS
R
L
WOOFERS
R
to BATTERY
*1
*1; The fuse is soldered.
1
2
3
4
5
6
7
8
9
10
11
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