Yamaha PortaTone PSR-740 Manual de servicio - Página 18

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Yamaha PortaTone PSR-740 Manual de servicio
A
B
C
PSR-740 / PSR-640 OVERALL CIRCUIT DIAGRAM (AM, HP, P.SW, VR, JACK, PN1, PN2, PN3, PN4, WH1, WH2, WH3, ENC)
1
AM
REGULATOR +9V
to DM - CN2
(PSR-740)
to DM - CN910
2
(PSR-640)
to DM - CN14
(PSR-740)
to DM - CN610
(PSR-640)
3
POWER AMP 0.65W 2CH
LA4525
4
*
OP AMP
*
5
OP AMP
*
R503,R504
R603,R604
Parts marked
are different between the models.
PSR-640
39K
2.2K
PSR-740
470K
1.8K
6
PN1
7
NJM78L05A-T3(XJ757A00)
NJM78L05A(XJ596A00)
REGULATOR +5V
REGULATOR +5V
3
2
1
8
1
2
3
1: OUTPUT
1: OUTPUT
2: COMMON
2: COMMON
3: INPUT
3: INPUT
µPC2933T-E1(XS516A00)
PQ09RA1(XQ774A00)
µPC29M33T-E1(XU965A00)
REGULATOR +9V
REGULATOR +3.3V
2
1
1: IN
3
2: OUT
1: V in
1
2
3
3: GND
2: GND
4
4: ON/OFcont.
3: V out
9
SI-8050S(LF1103)
AN77L09-TA (XT676A00)
(XT514A00)
REGULATOR +9V
REGULATOR +5V
1
3
2
5
1: V in
4
2: SW out
3: GND
1: OUTPUT
1
2
4: V os
3
2: COMMON
5: S.S
3: INPUT
S3V20 (VR313500)
DIODE
10
2
1
1: ANODE
2: CATHODE
28CC1-8814385
11
12
PSR-740 / PSR-640
A
B
C
D
E
F
G
EQUALIZER
EQUALIZER
PHONES
LA4262
HP
28CC1-8813198
*
*
POWER AMP
1.7W
28CC1-8813198
PN2
28CC1-8814385
HELP/
DIRECT ACCESS
/
LANGUAGE
COUNT
INTRO
INTRO
MAIN / AUTO FILL
D
E
F
G
H
I
J
FOOT SWITCH
+
P.SW
28CC1-8813198
VR
28CC1-8813198
to Toweeter
to Woofer
PN3
28CC1-8814385
PN4
28CC1-8814385
ON / OFF
SIMPLE
ENDING
REGISTRATION MEMORY
ONETOUCH SETTING
WH1
(PSR-640)
WH3
28CC1-
(PSR-740)
8814385
WH2
28CC1-8814385
H
I
J
K
L
M
INVERTER
*
C101, C102, C103: PSR-640 only
JACK
1
2
3
4
5
6
7
8
9
- / NO
0
+ / YES
DISK
ENC
SONG
UTILITY
28CC1-
8814385
MULTI PAD
to DM-CN4 (PSR-740)
to DM-CN12 (PSR-740)
to DM-CN10 (PSR-740)
to DM-CN710 (PSR-640)
to DM-CN510 (PSR-640)
to DM-CN520 (PSR-640)
K
L
M
N
O
P
Q
PSR-740 / PSR-640
FOOT VOLUME
*
C101
LINE TRANSCEIVER
to DM-CN5
(PSR-740)
to DM-720
(PSR-640)
28CC1-8814362
Note : See parts list for details of circuit board
component parts
TO SERVICE PERSONNEL
Critical Components Infomation
Components having special characteristics are marked
and must be replaced with parts having specifications
equel to those originally installed.
: Ceramic Capacitor
: Semi-Conductive Ceramic Capacitor
: Mylar Capacitor
PSR-740 / PSR-640
N
O
P
Q
1
2
3
4
5
6
7
8
9
10
11
12