Yamaha DSP-A595a Service Manual page 44

A B C
DSP-A595a
SCHEMATIC DIAGRAM (DSP)
TO INPUT(3) CB354
page E-50/J-48 N-8
1
2
DIGITAL
IN
5
Point
4.9
Pin 13 of IC3
0.2
V : 2V/div H : 50nsec/div
12
3 8
AC range 1 : 1probe
4.9
0 9
10
0 0
0
0
0V
2V SAMPLE 50ns
4
6
Point
Pin 13 of IC14
0
V : 2V/div H : 50nsec/div 0
0
AC range 1 : 1probe
4.9
4.8
4.8
0V
0
4.9
2V SAMPLE 50ns
5
IC1 : NJM2904M
IC8~13 : uPC4570G2
Dual OP AMP
A OUT V+
6
A –IN B OUT
A +IN B –IN
V– B +IN
0
4.9
0
0
4. 9
IC2 : HD74HC02FPEL
Quad 2 Input NOR
0
14 13 12 11 10 9 8
7
0
0
0
4.9
1 2 3 4 5 6 7
0
• 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
8
• 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
9
PIN CONNECTION DIAGRAM OF DIODES, TRANSISTORS AND IC's.
NJM2904M
1SS355 2SC3326(A,B) UPC29M33T-E1 HD74HC02FPEL
10 uPC4570G2
DTA144EKA
DTC144EKA
Anode
Cathode
E-53/J-51
D E F
4.9
0 8
3
2 0
0 4
0
14
13 5
0 7
0
6
7 0
0
3. 1
2. 4
2. 4
2. 9
0
2. 3
0. 9
4. 6
0. 1
0
3.1
0
0
0
0
0
0
DIR 0
0
0
0
0
0
0
0
0
4.8
2.3
2.3
5
2
2.3
2.3 1
3
~
~
4.4
~
~
DSP
CONTROL
4.9
~
0
4.9
4.9
4.9
4.9
4.9
6
4.9
TO INPUT(1) CB106
page E-50/J-48 I-8
AK4526A-VQ
AK4320-VM-E1 M5M51288BKJ-20LTEL LC875164A-5K20
13
24
12
G H
0
2.4
DSP + DOLBY DIGITAL/
2.4
0
PRO-LOGIC/DTS DECODER
0
1.4
2.4
2.4
2.4
3.1
0
YSS918D-F
4.7
4.7
RAM
3.3
0
YSS918D-F
I J K
4.8 4.8
2.4
4.8 4.8 2.4
7
0 0
2.4
2.4 2.4
0 2.4
ADC/DAC
0 2.4
2. 4 2.4
2. 4 2.4
0 2.4 2.4 2.4
2.4
0
0 1
0
1. 4 2.4
2.4 2.4 2.4
2.4
2. 8
0 2.4 0 0
0 2.4
MUTING
4.7
4.6
0.6
DAC 0
0
- 11.2
0 0 0 0
0
0
-11.2
- 11.2
0
0
0 0.6
4. 8 0
0
0 4 .9
0
2. 3 4 .9
4. 9 2 .4
2. 4 2 .4
~
2 .4
2. 4 0
0 4 .8
0
0 0
4. 8 0
- 11.2
0
0
0.5 0
- 11.2
-11.2
0 0.2 0.2
0
0. 5 0.2
4.8
4.8
0
0
0
0 0.5
MUTE
0
DRIVE
- 11.2
0
0
- 11.2
0
0
- 11.2
0
0
- 11.2
0
L M N
AK4526A-VQ
AK4526VQ
L.P.F
11.8
6
8 6 7 2.4
2.4 5
2.4 MAIN L
2.4
5
2.4
-11.7 (DSP)
11.8
3 2.4
8 3
2 1 2.4
2.4 2
-11.7
2.4
2.4
DSP AMP
0
11.8
0
0
0
0
0
MAIN
0
L
0
0
-11.7
0
11.8
0
0
0
FRONT L
0
0
-11.7
0
CENTER
11.8
0
0
0
REAR L
0
0
-11.7
0
Conditions All voltages are measured with a 10M Ω /V DC electric volt meter.
→ CD
• INPUT
Components having special characteristics are marked
→ minimum(–∞)
• VOLUME
must be replaced with parts having specifications equal to those
• IMPEDANCE
→ Upper originally installed.
SELECTOR
• PRO LOGIC → On Schematic diagram is subject to change without notice.
and