Yamaha PORTATONE PSR-170 Service Manual page 26

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A B
PSR-170 OVERALL CIRCUIT DIAGRAM
MK-L
MK-H
MM1385ENRE (XZ624A00)
REGULATOR +3.3V
VIN
VOUT
CONT
GND
NOISE
C D E
DM-LCD
LCD DRIVER
: Mylar Capacitor
: Ceramic Capacitor
: Semiconductive Ceramic Capacitor
: Metal Oxide Film Resistor
Note : See parts list for details of circuit board component parts.
F G
MIDI IN MIDI OUT
LCD
PHOTO
COUPLER
MIDI DRIVER
GEW-12
RESET
ROM 16M
PROGRAM STYLE WAVE
BUFFER
REGULATOR
+3.3V
BUFFER
Digitized in Heiloo the Netherlands
H I J
PN-AM 2/2
SUSTAIN
PN-AM 1/2
VR
POWER AMP
MASTER
VOLUME
REGULATOR
+5V
WARNING
Components having special characteristics are marked Z and must be replaced with parts having speci-
fication equal to those originally installed.
3/24/2019
K L
PSR-170
1
SPEAKER
R
2
3
4
5
PHONES/
OUTPUT
6
SPEAKER
L
STANDBY/ON
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
Not for sale!