Schematic Diagram - Yamaha DP-U50 Service Manual

A B C
I
SCHEMATIC DIAGRAM (DSP)
1
Point q (Pin 1 of IC417)
V : 2V/div, H : 50 nsec/div
Q Q
DC, 1 : 1 probe 7
3
3.2
0
0
0V
0 0
0 0
USB 0 0
0 0
Point w (Pin 4 of IC430)
V : 1V/div, H : 50 nsec/div
DC, 1 : 1 probe
2
0V
4.8 3.3
4.8 3.3
3.3
0
Point e (Pin 74 of IC436)
0
V : 2V/div, H : 0.1 µsec/div
DC, 1 : 1 probe
0V
3
3.1
2.6
3.1
Point r (Pin 47 of IC475)
V : 2V/div, H : 50 nsec/div
DC, 1 : 1 probe
4.2 4.2 0 0 0
0
PC IN
4.9
0
0V
4.2 4.2 0
AUX 1 0
IN
4 4.9
2.5
Point t-A (CH1 : Emitter of Q416)
4.9
PC OUT
Point t-B (CH2 : Collector of Q419)
0
V : 5V/div (CH1), V : 2V/div (CH2) 2.5
DC, 1 : 1 probe, H : 5 sec/div
2.4 2.4
0
0
4.9
CH1
2.4
4.9
0 2.3
0
4.9
0
CH2
AC CORD ON AC CORD OFF
5
IC406 : PQ025EZ5MZP
+2.5V Regulator
1 3
DC INPUT (VIN) DC OUTPUT (VO)
2.5
I C
T E
L 1 3 9 4
2 ON/OFF CONTROL (VC)
2.5 0
5
GND
4.8 3.3
IC445, 454, 458, 471, 473 :
µPC4570G2
6
IC416 : NJM2904M-T1 4.8
3.3
Dual OP Amp
0
0
OUT 1 1 8 +V CC
–IN 1 2 7 OUT 2
+ – + –
4.8
+IN 1 3 6 –IN 2
–V 4 5 +IN 0 4.8
CC 2
0
4.8
0
IC401 : TC74HC00AF 4.8
0
0
Quad 2 Input NAND
2.4
7
A1 1 14 V DD
2.1
0
B1 2 13 B4
Y1 3 12 A4
A2 4 11 Y4
B2 5 10 B3
3.0
0
Y2 6 9 A3
0
0
V 7 8 Y3 4.8 0
SS 0
0
4.8 0
0
3.3
IC418 : TC74HCUO4AF-TP1
0
IC479 : TC74HCTO4AF-T1
0
Hex Inverters 3.3
0
8 4.9
1A 1 14 V DD 0
0
1Y 2 13 6A 0
4.8
2A 3 12 6Y
0
2.2
2Y 4 11 5A
0
q
2.0
3A 5 10 5Y
0
0
3Y 6 9 4A
2.4
V SS 7 8 4Y
µ
IC478 : PC4574G2
4Channel OP-Amp
9
OUT A 1 14 OUT D
A D
–IN D
–IN A 2 – + + – 13
+IN A +IN D
3 12
V+ 4 11 V–
+INB 5 10 +INC
–INB 6 9 –INC
– + + –
B C
w w w
OUT B 7 8 OUT C
.
2SA1037K (Q, R, S) 2SK1725-AZ 1SS355 L88M33T PQ025EZ5MZP NJM2904M
10
µPC4570G2
2SC2412K (Q, R, S) 1SR154-400
2SC3326 (A, B) UDZ4.7B
DTA144EKA UDZS6.8B
C
1: VIN
2: VC 8
1 2 3 1: VIN 1 5
3: VO
D 2: GND
E G 4: NC
3: VOUT
S 5: GND
B
D E F
USB CONTROLLER
1 5 1
6 3
1.1
3.1 4.8
w
1.1 4.8
0.9 0
3.3 0 2.4
0 3.2 2.4
0 3.2 2.3
0 1.1 2.4
2.4 4.8 2.4
2.4
2.7 0 2.3
2.8 0
0
0
2.8
0.4
0
0
0
0
0
0
0
0
0
4.9
0
0
4.9
0.4
0
0
4.9
4.9
4.9
4.9
4.9
0
0
0
2.9
0
4.9 0 0
0
0
0
0
3.3
2.4
4.9
0
0
0
4.9
3.9
0
3.9 0
0
4M
DRAM
2 2 9 6 5 1 3
2.3
2.2
1.8
2.4
0
0
3.3
0
0
3.3
2.0
2.2
0
2.1
0
AC3D3
0
1.6
3.2
2.3
1.6
1.6
1.6
0
2.4
0
0
0
x a o
y
i
TC74HC00AF CS5360-KSR AD1854JRSRL LC75342M-TLM
TC74HCT04AF-T1
TC74HCU04AF-TP1
15 16
µPC4574G2
11
5 8
14 15
28
20 10 30
14
7
4
1 1
1 1
1
http://www.xiaoyu163.com G H
5
0
3.2
0
1.3
0.7 0.7
0
2.4
0
0
3.2
2.4
2.4
0
0
0
0
0
0
4.9
4.8
GATE ARRAY
0
4.8
0
0
0
3.0
0
3.3
0
0
0
r
2.1
2.3
0
Q Q
3 7 6
5.1 1.1
5.1 0
0.1 2.0
4.9 2.3
4.8 e 1.4
0 0
5.0 0
2.4 4.8
4.4 0
0 1.0
2.4 0.1
4.9 4.8
0 4.6
4.9 4.8
0 4.8
4.8 0.8
CPU
0 4.8
0 0
4.8 4.8
1.1 4.8
4.8 4.8
4.8
4.8 1.1
0
4.8
0 4.8
0 4.8
5.0 4.8
4.8 0.2
CIRCUIT CHANGES BY MARKET.
X : NOT USED
u 1 6 3
.
M5M51008CFP-70H MSM514260C-60JS MBM29F400BC-55 USS-820DT-DB HD6417014F28F
84
25 85
17 36 25
21
37 24
24
16 20
32
40 48
48 13
1
1 112
1 12
1 1
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I J K
2 4
8 9 9
SRAM
4M ROM
t A
14.7
4.8 4.3 4.3 0
MAIN
0
0
0.3
DAC 4.3
0
4.8
0
2.3 0
4.9 2.4
4.9 2.4
3 0 1 4.8 5 1 5 0 8 9
0 0.3
0
4.8 0
0.3
4.8 0
4.3
0 2.4
4.8 2.3 0 0
0 4.8
4.3 4.3 0
-14.7
2.3 2.3
4.8
2.4 2.4
2.4 0
4.9
4.8
USB
-14.0
4.8 4.3 4.3
DAC
0
4.3
MIX MUTE
0
0 4.8 14.7
2.3 0
0
4.9 2.1
0
0
4.9 2.4
0 4.8
0
0
0
0 4.8
0.6
4.8
2.4 0
0
0 3.2
4.8
0
2.3 2.3
0
2.4 2.4
2.4 0
0.6
0
0 0
0
-14.7
0
0 4.3
4.8
4.3 4.3
0 0
0 -14.7
0
0
0
4.9
14.7
2.2
2.2
2.2
2.2
0 0
0
0 0
4.9
4.9 4.8
2.2
0 2.2 2.2 14.7
2.2
0
0 2.2
0
4.9 2.2 0
0
2.2
2.3
2.4 2.2
2.4
3.9 0
4.9
2.2 0
0
0
-14.7
4.9 0
2.2
2.2 2.2
2.2
A/D CONVERTER
-14.7
4.9
m
c o
YSS928 LC27287B-TF3
57 120 81 132 89
56
121 80 133 88
160 41 176 45
29
28 1 40 1 44
L M N
DP-U50
2
8 9 9
5.1 5.7
4.9 5.7 4.9
TO OPE (1)
5.7
P-E39/J37
C-8
RESET
10.4
0.4 4.9
10.4
0
9.8
0
6.8
0 0
0
0
2.4
TO MAIN
P-E39/J37
tB
C-3
0
0
TO MAIN
P-E39/J37
C-5
SF MUTE
0
0.6
0
0
2 4 9 8 2 9 9
0.6
0
A MUTE
L
0
-14.0 0 PRE OUT
0
-14.0 0
R
L
AUX 2 IN
A MUTE 14.7
0
0 0
R
0 0
-14.0
0 0
-14.0
0
0
-14.0
-14.0
0 0
0
0
0
-14.7
L
AUX 1 IN
R
L
PC IN
INPUT SELECTOR &
R
VOLUME
* All voltage are measured with a 10MΩ/V DC electric volt meter.
* Components having special characteristics are marked Z and
must be replaced with parts having specifications equal to those
originally installed.
* Schematic diagram is subject to change without notice.
E-38/J-36