Yamaha PortaTone PSR-350 Manuale di servizio - Pagina 17
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A
B
C
PSR-350 OVERALL CIRCUIT DIAGRAM 1/2 (DM, AM, VR, PW, TW-L/R)
DM
AND
FDD
CN2
CN1
FDC
:
Mylar Capacitor
:
Ceramic Capacitor
: Semiconductive Ceramic Capacitor
: Metal Oxide Film Resistor
Note : See parts list for details of circuit board component parts.
WARNING
Components having special characteristics are marked
Z
and must be replaced
with parts having specification equal to those originally installed.
D
E
F
WAVE ROM 32M
DRAM 4M
PROGRAM ROM
32M
SRAM 1M
SRAM 1M
MIDI I/F
to PN 1-CN2
to PN 1-CN1
to LCD-CN1
AM
FOOT SWITCH
MIDI IN
MIDI OUT
to BACK LIGHT ASSEMBLY
G
H
SWX00B
C-BUS POWER
P-BUS POWER
REGULATOR +5V
DAC
LPF
POWER AMP
REGULATOR
+5V
DC-DC CONVERTER
I
J
K
REGULATOR
+3.3V
SYSTEM RESET
to MKS5-CN1
VR
TW
-L
TW
MASTER VOLUME
PHONES/OUTPUT
PW
Z
STANDBY/ON
to BATTERY
DC IN 10-12V
DM : 28CC1-8819534
Z
AM, TW-L/R : 28CC1-8819535
VR, PW : 28CC1-8819536
L
PSR-350
1
NJM78L05A (XC520A00)
REGULATOR +5V
1: INPUT
1
2
3
2: GND
3: OUTPUT
S81250SGY-Z (XT625A00)
2
REGULATOR +5V
1: GND
1
2
3
2: INPUT
3: OUTPUT
µPC29M33HF (XT333A00)
REGULATOR +3.3V
3
1: INPUT
1
2
2: COMMON
3
3: OUTPUT
4
5
-R
6
L
TWEETER
R
7
L
WOOFER
R
8