Psr-S550/Psr-S550B Overall Circuit Diagram - Yamaha PSR-S550 Service Manual

A B
< Page2 >
PSR-S550/PSR-S550B OVERALL CIRCUIT DIAGRAM 2/5 (DM 2/2 )
1
DM
2
3
CPU(SWX02)
SWX02
XTAL : 16.9344MHz
4
Int. clk : 135.4752MHz
Bus clk : 67.7376MHz
Ext. clk : 33.8688MHz
CPU(SWX02)
5
INVERTER
6
<Page1 H6>
7
8
PSR-S550/PSR-S550B
A B
C D E
2/2
Not Installed
AND
AND
Not Installed
Not Installed
Not Installed
<Page1 I2>
DAC
<Page1 H5>
<Page1 D6>
Not Installed
<Page1 C5>
P2ROM 256M
WAVE
Not installed
C D E
F G
to 61H-CN2
<Page4 C6>
AND
CPU
OP AMP
WARNING
Components having special characteristics are marked and must be replaced with parts
having specification equal to those originally installed.
F G
H I
to 61L-CN5 to 61H-CN1
<Page4 C8> <Page4 C5>
<Page1 D5>
AND
<Page1 C6>
USB HIGH SIDE
SWITCH
<Page1 C6>
<Page1 J2>
to AM-CN104
<Page3 C4>
Not Installed
Not Installed
Ceramic Capacitor
Note: See parts list for details of circuit board component parts.
H I
J K L
PSR-S550/PSR-S550B
1
to PNL-CN103
<Page5 K6>
2
to ENC-CN301
<Page3 C6>
3
Not Installed
to JACK-CN403
<Page3 K3>
4
5
DC/DC
CONVERTER
6
7
28CC1-2001035401-2
8
PSR-S550/PSR-S550B
J K L