Yamaha PSR-170 Manuale di servizio - Pagina 26
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PSR-170 OVERALL CIRCUIT DIAGRAM
MK-L
MK-H
MM1385ENRE (XZ624A00)
REGULATOR +3.3V
VIN
VOUT
CONT
GND
NOISE
D
E
DM-LCD
LCD
LCD DRIVER
REGULATOR
+3.3V
:
Mylar Capacitor
:
Ceramic Capacitor
: Semiconductive Ceramic Capacitor
: Metal Oxide Film Resistor
Note : See parts list for details of circuit board component parts.
F
G
H
MIDI IN
MIDI OUT
SUSTAIN
PHOTO
COUPLER
MIDI DRIVER
GEW-12
RESET
ROM 16M
PROGRAM STYLE WAVE
BUFFER
BUFFER
WARNING
Components having special characteristics are marked Z and must be replaced with parts having speci-
fication equal to those originally installed.
I
J
PN-AM
2/2
SPEAKER
PN-AM
1/2
VR
POWER AMP
MASTER
VOLUME
STANDBY/ON
REGULATOR
+5V
K
L
PSR-170
1
R
2
3
4
5
PHONES/
OUTPUT
6
SPEAKER
L
DC IN 12V
7
*1
*1: The fuse is soldered.
8
DM-LCD, PN-AM, VR : 28CC1-8819402
5
MK-L, MK-H : 28CC1-8819596