Yamaha DSP-A595a Service Manual page 24

A B C
DSP-A595a
SCHEMATIC DIAGRAM (MAIN)
1
Q Q REGULATOR
3 7
29.4
12.8
13.4
0
MAIN POWERAMP
2
0.6 0
MUTE
0.6
0.6
0
0
0 -11.6
-41.7 -42.5
0
-41.7
3
MAIN
L
0.6 0
MUTE
0.6 0.6
0 0
0 -11.6
-41.7 -42.5
4
0
-41.7
REAR
POWER AMP
REAR L
5
MUTE
0.6
0.6
0 0
0 -11.6
-42.5
T E -41.7
L 1 3
0
-41.7
6
MUTE
0.6 0.6
0
0
-11.6
0
7 -41.6 -42.5
0
-41.6
CENTER
CENTER
POWER AMP
8
MUTE
0.6 0.6
0 0
-11.6
0
-41.6 42.5
0
-41.6
9
w w w
PIN CONNECTION DIAGRAM OF DIODES, TRANSISTORS AND IC's.
1SS133 HZS242TD D5SB20 2SC1740S(R,S) 2SA893A(D,E) 2SC2229(O,Y)
10
1SS176 HZS302TD 2SA970(GR,BL) 2SC2240(GR,BL)
HSS104 2SA1015(Y) 2SC2878(A,B)
1SS270A 2SC1815(Y)
1T2 2SC1890A(D,E)
HZS12C2TD
Anode
B
C
E
Cathode
E
C
B
E-51/J-49
D E F
6 3 1 5
MAIN POWER AMP
43.5(30.2)
1.0
43.5(30.2)
0.5
1.0 0.5
0
-0.5
-1.1
0
-0.6
-0.6
0
-1.1
-43.5
(-30.3) 0
1.1
-43.5
MAIN (-30.3)
L
-42.3
43.5(30.2)
1.0
43.5(30.2)
0.5
0.5
1.0
0
-0.5
-1.1
0
-0.6
-0.6
0
-1.1
-43.5
1.1 (-30.3) 0
-43.5
(-30.3)
REAR POWER AMP
-42.3
43.5(30.2)
1.0
43.5(30.2)
0.5
1.0 0.5
0
-0.4
-1.1
0
0
9 4 2 2 9 6 5 1 3
-0.6
0
-0.6
-1.1
-43.5
(-30.3)
1.1
-43.5
(-30.3)
-42.3
43.5(30.2)
1.0
43.5(30.2)
0.5
0.5
1.0
0
-0.4
-1.1
0
0
-0.6
-0.6
-1.1 -43.5
0
(-30.3)
-1.1
CENTER
-43.5
(-30.3)
CENTER POWER AMP
-42.3
43.5(30.2)
1.0
43.5(30.2)
0.5
0.5
1.0
0
-0.5
-1.1
0
0
-0.6 -0.6
0
-1.1
-43.5
-1.1
(-30.3)
-43.5
(-30.3)
-42.3
x a o
. i
2SA1708(S,T) 2SA1492(O,P,Y) NJM7812FA
NJM79M12FA
2SA1695(O,P,Y)
2SC4488(S,T) NJM78M05FA
2SC3856(O,P,Y)
2SC4468(O,P,Y)
1.OUTPUT 1.COMMON
2.COMMON 2.INPUT
3.OUTPUT
3.INPUT
B
C
E
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G H
1 5 0
43.5
43.4
0
MAIN L
43.3
0
0
RELAY
DRIVE
43.3
0
0
20.3 0.1
0.1
0.6
0
-42.5
-29.8
43.3
-30.2
0
0
0
Q Q
3
REAR L
43.3
0
RELAY
0
DRIVE
20.4 0.1
20.3 0.1
0.7
0.1
43.3
0
0
0
CENTER
u 1 6 3
y
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I J K
8 9 2 4
OUTPUT
R
MAIN
L
SPEAKERS
L
A
R
L
B
R
PHONES
B A
SPEAKERS
7 6 3 1 5 1 5 0 8
OUTPUT
POWER SUPPLY
L
43.5
(30.2)
REAR
(SURROUND)
R
-43.5
(-30.3)
CENTER
SPEAKERS
L
REAR
(SURROUND)
R
CENTER
-11.8 -19.5
0
m
c o
.
L M N
MAIN (1),(2),(5),(6) MAIN (3),(4),(7),(8)
9 8 2 9 9
6 C751 752 8200/56 8200/56 8200/56
(V317930) (VV95180) (VV95180)
:NOT USED
:NOT USED
9 2 4 9 8 2 9 9
29.4
AC68.4
AC48.0
IMPEDANCE
SELECTOR
23.9 29.3
24.6
0
0
-24.2
-29.7
-23.6
5.0 9.5 11.9 18.8
0 0
REGULATOR
All voltages are measured with a 10M Ω /V DC electric volt meter.
Conditions
→ CD
• INPUT Components having special characteristics are marked
→ minimum(–∞)
• VOLUME must be replaced with parts having specifications equal to those
• IMPEDANCE
originally installed.
→ Upper
SELECTOR
Schematic diagram is subject to change without notice.
• PRO LOGIC → On
and