Yamaha AP-U70 Manual de serviço - Página 34

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Yamaha AP-U70 Manual de serviço
A
B
C
AP-U70
I
SCHEMATIC DIAGRAM (MAIN & OPERATION)
1
2
3
4.8
TO DSP
P-E38/J36
N-3
4
TO OPE (2)
SAME PAGE
I-6
5
TO DSP
P-E38/J36
N-5
6
7
TO DSP
P-E38/J36
N-1
8
9
TO OPE (2)
SAME PAGE
I-7
10
E-39/J-37
D
E
F
CIRCUIT CHANGES BY MARKET.
O : USED
0.1
20.0
0.7
14.6
14.6
0
19.9
0.7
9.0
0
0.7
15.2
1.2
0.7
0.7
0.7
1.2
15.2
4.4
0
0
0
5.7
5.7
-15.2
0
4.8
0
0
4.4
0
-14.4
-14.4
-15.3
4.4
-14.7
-20.1
A MUTE
0.1
14.6
0.1
0.1
0.1
-14.4
14.6
0
0
-0.3
0
0
-14.4
0.1
0.1
0.1
0
0
0.1
-14.7
0
-14.7
0
14.6
S MUTE
0
0.1
-14.4
0
0
0
0
-14.4
0
0.1
0
-14.7
-5.7
-5.7
-6.3
FL DRIVER
-17.9
-17.5
-17.5
G
H
3.3
0
9.9
3.3
0
9.9
5.7
10.4
4.9
5.0
0.6
0.6
0
9.9
23.4
-0.2
4.9
4.9
0
-21.0
MAIN POWER SUPPLY
9.9
-21.5
4.9
-27.1
4.9
0
-20.0
19.9
0
27.2
0
0
0
-27.2
SUB POWER SUPPLY
AC44.3
10.5
5.1
0
0.1
10.4
5.1
S MUTE
0
0
-14.4
-14.4
0
0
27.4
27.3
0
27.1
POWER AMP
0
0
0
0
0
0
0
0
27.1
-1.0
~
-16.8
-20.4
-20.4
~
~
-20.4
-16.8
-16.8
-2.1
-6.7
-6.1
-6.2
-6.2
-3.6
I
J
K
IC10, 11 : PQ05RD11
+5.0V Regulator
1
2
VIN
VO
I C
4
CV
3
GND
TO OPE (1)
SAME PAGE
I-9
-21.5
0
FROM POWER TRANS
AC9.5
FROM POWER TRANS
AC33.0
AC44.3
IC301 : LC75710NE
FL Display Driver
FROM POWER CORD
G6
49
G5
50
51
G4
G3
52
G2
53
G1
54
VFL
55
TEST
56
VSS
57
OSCO
58
OSCI
59
VDD
60
RES
61
CE
62
CL
63
DI
64
FROM POWER TRANS
TO MAIN (1)
SAME PAGE
C-4
TO OPE (1)
SAME PAGE
C-9
TO MAIN
SAME PAGE
J-2
L
M
N
IC6, 8 : µPC4570HA
IC7 : BA15218N
Dual OP-Amp
Dual OP-Amp
+
+
–
–
1
2
–
+
+
–
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
V
CC
V
O1
–Vm
1
+Vm
1
V
EE
+Vm
2
–Vm
2
V
O2
V
CC
IC9 : STK402-030
Power Amp
+
+
CH.1
CH.2
–
–
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
CG
DI
ROM
CL
SHIFT
DC RAM
AM1
REGISTER
32
AM32
CE
CG
AM2
31
AM31
ROM
30
AM30
29
AM29
ADDRESS
ADDRESS
AD
AM28
VDD
AM35
28
REGISTER
COUNTER
RAM
27
AM27
AA1
VSS
26
AM26
BLINKCYCLE
BLINK
AA2
25
AM25
REGISTER
GENERATOR
VFL
AA3
24
AM24
AA4/G16
AM23
RES
DISPLAY
DISPLAY
23
REGISTER
CONTROL
AA5/G15
22
AM22
TEST
AA6/G14
21
AM21
DUTYCYCLE
DUTY
AA7/G13
20
AM20
REGISTER
GENERATOR
AA8/G12
19
AM19
G11
AM18
GRID
GRID
18
G10
REGISTER
CONTROL
17
AM17
INSTRUCTION
CONTROL
DECODER
OSC I
G2
TIMING
OSC
DIVIDER
GENERATOR
DECODER
G1
OSC O
S1VB20
1SS133
UDZ3.6B
Anode
1SS270A
1T2
MTZJ16.0A
MTZJ22.0C
MTZJ24.0B
Cathode
–
+
2SC1740S (R, S)
2SA1708 (S, T)
S4VB20
DTA114ES
2SD1858TV2 (Q, R)
2SC2412K (Q, R, S)
C
B
B
C
E
C
E
E
B
AN78N09
NJM78M05FA
2SA893A (D, E)
2SB1565 (E, F)
2SD2396 (J, K)
2SC1890A (D, E)
2SC2878 (A, B)
1: OUTPUT
1:INPUT
2: COMMON
2:COMMON
B
1 2
3: INPUT
3 2
3:OUTPUT
1
E
C
3
C
E
B
BA15218N
µPC4570HA
PQ05RD11
1: VIN
8
2: VO
9
3: GND
4: VC
1
4
1
1
STK402-030
LC75710NE
48
33
49
32
64
17
1 5
1
16
1
* 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.
O