Yamaha DSP-A595a, Service Manual

Page: 44 / 58

A
1
2
3
4
5
6
7
8
9
10
DSP-A595a
B C D E F G H I J K L M N
★ All voltages are measured with a 10M
Ω
/V DC electric volt meter.
★ Components having special characteristics are marked and
must be replaced with parts having specifications equal to those
originally installed.
★ Schematic diagram is subject to change without notice.
■ SCHEMATIC DIAGRAM (DSP)
PIN CONNECTION DIAGRAM OF DIODES, TRANSISTORS AND IC’s.
M5M51288BKJ-20LTEL LC875164A-5K20 AK4320-VM-E1 1SS355 AK4526A-VQ YSS918D-F NJM2904M
uPC4570G2 UPC29M33T-E1 HD74HC02FPEL 2SC3326(A,B)
DTA144EKA
DTC144EKA
Anode
Cathode
12
13
24
Conditions
• INPUT
→
CD
• VOLUME
→
minimum(–
∞
)
• IMPEDANCE
SELECTOR
→
Upper
• PRO LOGIC
→
On
E-53/J-51
IC1 : NJM2904M
IC8~13 : uPC4570G2
Dual OP AMP
IC2 : HD74HC02FPEL
Quad 2 Input NOR
A OUT
A –IN
A +IN
V–
V+
B OUT
B –IN
B +IN
1B 1A 1Y 2Y 2A 2B
GND
Vcc 4A 4B 4Y 3Y 3B 3A
1 2 3 4 5 6 7
14 13 12 11 10 9 8
Point 5
Pin 13 of IC3
V : 2V/div
H : 50nsec/div
AC range 1 : 1probe
2V SAMPLE 50ns
0V
Point 6
Pin 13 of IC14
V : 2V/div
H : 50nsec/div
AC range 1 : 1probe
2V SAMPLE 50ns
0V
• IC3: YM3436DK
→
See page E-25/J-23
• IC4: YSS918D-F
→
See page E-26/J-24~E-28/J-26
• IC5: M5M51288BKJ-20LTEL
→
See page E-29/J-27
• IC6: AK4526A-VQ
→
See page E-30/J-28
• IC7: AK4320
→
See page E-29/J-27
• IC14: LC875164A-5K20
→
See page E-23/J-21~E-24/J-22
FRONT L
REAR L
DIGITAL
IN
MAIN L
(DSP)
MAIN
L
CENTER
3. 1
0
0
0
4.9
0
4.9
0
0
0
2. 4
2. 4
2. 9
0
0
0
4.7 2.4 2.4
2.4 0
2.4 2.4
0 0
3.1
4.9 0
0
4.7
2.3
2.3
0 0
2.3 1.6
0
3.1
0
3.1
4.9 4.9 4.9
2. 3
0. 9
4. 6
0. 1
0
3.1
0
0
0
0
0
0
0
0
0
0
0
0
2. 4
2. 4
0
0
0
1. 4
0 0
4.
7 0
4.9
0
0 0
0 0
0
0
0
0
0
4. 9
4.9
0
0
0
0
4.9
0
0
4.9
4.8
4.8
0
4.9
2.4
2.4
2.4
2.4 2.9 2.3 4.9
0
2.4
2.4
0
0
1.4
2.4
2.4
2.4
2.4 2.4 2.4 2.4 2.4 2.4 2.4
4.7 2.4 4.7 4.6 2.3 0.9 0.1
0
0
3.1
0
0
4 .9
4.8
2.4
2.4
11.8
2.4
2.4
2.4
2.4
2.4
-11.7
-11.7
11.8
2.4
2.4
2.4
0
0
0
0
0
0
0
0
0
11.8
0
0
0
-11.7
0
0
0
11.8
0
0
0
-11.7
0
0
0
0
- 11.2
- 11.2
0
0
-11.2
0.2
0.2
0 0.5
0. 5
0.5 0
4.8
4.8
0
0
0 0.2
0
0
0
- 11.2
- 11.2
0
0
0
0
- 11.2
- 11.2
0
0
0
0
- 11.2
- 11.2
0
0
-11.7
0
11.8
0.6
0.6
0
2.4
2.4
2.4
4.8
2.4
4.8
4.8
2.4
2.4
2.4
0
0
0
2.4 2.4
2.4
0
0
0
4 .9
2 .4
2 .4
2 .4
0
4 .8
0
0
0
4. 8
0
0 0
4.7
0
4.6
-11.2
0
0
0
0
2. 3
4. 9
2. 4
2. 4
0
0
4. 8
0
4.9 4.9
0 2.3 0 4.8
4 .8
2.4
4.4
0 4.9
4.9
~
0
4.9
4.9
4.9
4.9
4.9
4.9 3.3
0
0
0
0
0
0
0 0 0 0
2.1
4.9 4.9
0
4.8
2.3
2.3
4.7
4.7
1.0
0
0
0
4.9
0.2
0
0
0
0
2.8
1.0 0 0 0.1 0.1 0.1 0.1
~ ~ ~
1.0 1.0 0 0 0.1
~ ~
2.4
~
0.1 0.1 0.1
4.9 4.9
0
4.8 4.8
0 0
4.4 4.9
0
2.2 2.5 4.9
~
~
~
~
~ ~ ~
2.4
~ ~ ~
2. 8
~
~
~
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
5
6
L.P.F
ADC/DAC
DSP AMP
DAC
MUTE
DRIVE
RAM DSP
CONTROL
DSP + DOLBY DIGITAL/
PRO-LOGIC/DTS DECODER
DIR
MUTING
TO INPUT(3) CB354
page E-50/J-48 N-8
7
5
6
4
8
14
7
12
13
8
9
10
3
2
5 6
4
TO INPUT(1) CB106
page E-50/J-48 I-8
1
2
3
AK4526A-VQ
8
1
3
2
3
2
1
7
8
5
7
5
6
6
T
O
INPUT(1) CB102
page E-50/J-48
D-1
YSS918D-F
AK4526A-VQ
AK4526VQ