Yamaha R-S700, Service Manual

Page: 52 / 84

IC102
CB107
W1
05
W1
0
1
W1
03
W1
02
SW1
02
CB101
SW1
0
1
CB104
W104
IC101
CB106
MAIN (1) P.C.B.
(Side A)
MAIN (4) P.C.B.
(Side A)
MAIN (3) P.C.B.
(Side A)
POWER TRANSFORMER
+
ON/OFF
OUT
PO
WER
MANA
GEMENT
HIGH/L
O
W
IMPED
ANCE
SELECT
OR
SUB
W
OOFER
LR
MAIN IN/ PRE OUT
-
-
+
R
L
A/B
SPEAKERS
A, G models
HPR
E R E L
E
HPL PR
V
-1
5UNRE
G
+1
5UNRE
G
-VP_UNRE
G E
+VP_UNRE
G
E
AC
L
AC
L
AC
H
AC
H
COUPLER
5 k-ohms
10
W
5 k-ohms
10
W
PREMT
SWMT
MG
+5S
POW_MGT
THM
THM
SPBRY
SPARY
HPRY
PRI
PRD
GND OUT VC
C
VC
C
GND OUT
OPERATION (2)
(W803)
FUNCTION (1)
(CB506)
OPERATION (2)
(CB804)
OPERATION (13)
(CB13)
Note) Those parts marked with “#” are not included in the P.C.B. ass’y.
# # # #
# # # #
-15V
+15V
MAININ_R
AGND
PREOUT_R
MAININ_L
AGND
PREOUT_L
Q124A Q122A Q122C Q124C
Q123A Q121A Q123C Q121C
A B C D E F G H I J
1
2
3
4
5
6
7
52
R-S700
Notes)
Safety measures
• Some internal parts in this product contain high voltages and are dangerous. Be sure to take safety measures during servicing, such
as wearing insulating gloves.
• Note that the capacitors indicated below are dangerous even after the power is turned off because an electric charge remains and a
high voltage continues to exist there. Before starting any repair work, connect a discharging resistor (5k-ohms/10W) to the terminals
of each capacitor indicated below to discharge electricity. The time required for discharging is about 30 seconds per each.
C134 and C135 on MAIN (1) P.C.B.
• Semiconductor Location
Ref no. Location
D101 C5
D102 C3
D103 D4
D104 D4
D105 D4
D106 D4
D107 E4
D108 E4
D111 I6
D115 H6
D116 H7
IC101 E7
IC102 E2
Q101 C4
Q102 C4
Q103 C5
Q104 C4
Q105 D5
Q106 D4
Q107 D4
Q108 D4
Q109 D4
Q110 D4
Q111 C5
Q112 C3
Q113 D5
Q114 D5
Q115 D3
Q116 D3
Q117 E5
Q118 E3
Q119A E5
Q119C F5
Q120A E3
Q120C F3
Q121A E5
Q121C F5
Q122A D3
Q122C F3
Q123A D5
Q123C G5
Q124A E3
Q124C G3
Q127 H6
Q129 H6
Q137 H6