Overall Circuit Diagram - Yamaha PORTATONE PSR-172 Service Manual

H I
PSR-172
3

OVERALL CIRCUIT DIAGRAM

TR101, R119, R120 and IC002 (DM-LCD) have been modified.
4
VR
MASTER
VOLUME
5
6
7
: Mylar Capacitor
8
: Ceramic Capacitor
: Semiconductive Ceramic Capacitor
: Metal Oxide Film Resistor
Note : See parts list for details of circuit board component parts.
8
J
PN-AM 1/2
POWER AMP
REGULATOR
+5V
(Modifying part)
STANDBY/ON
2SB1135 or 1269
*1: The fuse is soldered.
DM-LCD, PN-AM, VR : 28CC1-8819402
MK-L, MK-H : 28CC1-8819596
WARNING
Components having special characteristics are marked Z and must
be replaced with parts having specification equal to those originally
installed.
K
PHONES/
OUTPUT
SPEAKER
L
DC IN 12V
*1
7
L