Yamaha DSP-AX620 Service Manual page 57

A B C
SCHEMATIC DIAGRAM (INPUT 2/2 & OPERATION 1/2)
1
11.9 5.1
5.1
11.9 5.7
5.7
P-E69/J67 11.9
11.3 5.7
J-1
0
0.8 0
0
9.2
0
0
0
0
–5.7
2.6
–5.7
–5.7
–5.7
–5.1
–11.9 –5.1
2
LEVEL CONTROL
RL
0 5.1
0 0 0 –5.1
4.9 0
0 0
5.1 –5.1
0 5.1
0 0
0 0
4.9 0 0 5.1
0 –5.1
C 0 5.1
3
0 0 0 –5.1
4.9 0
0 0
5.1 –5.1
0 5.1
0 0
0 0
4.9 0
0 5.1
0 –5.1
L 0 5.1
0 0 0 –5.1
4.9 0
P-E69/J67
0 0
I-1
5.1 –5.1
0 5.1
4 0 0
0 0
4.9 0 0 5.1
0 –5.1
5
TONE CONTROL
8
3
11.8
0 1
2 0
0
L
P-E69/J67
K-1
6
6
0 7
5 0
0
–11.8
4
11.8
8
3
1 0
0 2
0
7
6
7 0
0 5
0
4
–11.8
P-E69/J67
B-3
8
9
µ
IC501, 502 : PC4570G2 IC305–307 : CS3310-KSR
Dual OP-Amp Stereo Digital Volume Control
AINL 16
OUT 1 1 8 +V CC
–IN 1 2 7 OUT 2
+ – + –
MUX
+IN 1 3 6 –IN 2
8
–V CC 4 5 +IN 2
AGNDL
15
AGNDR
10
8
10
MUX
AINR 9
12
VA+
D E F
–14.4
~
–10.9
–27.8
–24.4
–27.8
–24.4
4.9 4.9 4.9
~
–24.4
–21.5 –14.8
–27.8
–17.7
–24.7 –24.7 –24.7
~
~
–17.6
–27.8
~
~
N. C
P-E69/J67
G-9
4.9
4.9
–11.8
4.9
4.9
–11.8
4.9
4.9
–11.8
IC502 : LC75725E
FL Display Driver
48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
S8 49
S7 50
14 AOUTL S6 51
S5 52
8 MUTE S4 53
S3 54
8
1 ZCEN S2 55
S1 56
2 CS
CONTROL VSS 57
REGISTER
3 SDATAI
OSCO 58
16 SERIAL TO
PARALLEL 7 SDATAO OSCI 59
REGISTER
VDD 60
8 SCLK
6
61
BLK
CE 62
CL 63
11 AOUTR
DI 64
1 2 3 4 5 6 7
13 4 5
VA– VD+ DGND
G H
4.9 4.9 4.9
–24.5 –24.5 –24.5
–28.2 –24.8 –24.8 –24.8
FL DRIVER
–24.5
–24.5
–24.5
–24.8
–24.6
–24.7
–24.6
–24.6
–24.6
–24.6
–28.2
4.8
4.8
4.8
4.9
0 3.4
4.8 4.8
0 0
MAIN CPU 5.1
4.8
0
4.8 4.8
4.8 w 0
4.9
0
UPD784217AGF 2.3
2.9
4.9 4.9
4.9
0
0 4.8
0
4.8
0
0
12 11 3 2 14 15 55 56
32 S25 DIGIT SEGMENT DRIVER
DRIVER
31 S26
30 S27
MPX
BLK 61
29 S28
28 S29 VFL 1,13
LATCH
27 S30
26 S31
DIMMER
GRID
25 S32 TIMING
CONTROL
GENERATOR
24 S33
23 S34
SHIFT REGISTER
22 S35
21 S36 TIMING
GENERATOR
20
S37
DIVIDER
ADDRESS
19 S38
DETECTOR
OSCI
18 S39 59 CLOCK
GENERATOR
17 S40 OSCO 58
57 60 64 63 62
8 9 10 11 12 13 14 15 16
I J K
–20.5
–28.2
P-E72/J70
K-5
CIRCUIT CHANGES BY MARKET.
e
A
RESET
5.6 12.4
e
4.8 B
0.6
0
0
0 0
0 12.4 12.4
11.7
4.9 5.6
5.6
4.9
7.5
0.047F 6.8
0
0.4
0.4
0 1.5
0 0 0
0
0
Point w (Pin 38 of IC501)
V : 2V/div, H : 0.1 µsec/div
DC, 1 : 1 probe
0V
Point e-A (/RES : Collector of Q510)
Point e-B (S12 : Emitter of Q511)
V : 5V/div (S12), V : 2V/div (/RES)
DC, 1 : 1 probe, H : 1 sec/div
S12
0V
0V
/RES
AC CORD ON AC CORD OFF
L M N
DSP-AX620
O : USED X : NOT USED
Conditions
• INPUT: DVD auto
• PROGRAM: PRO LOGIC DSP
* 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-70/J-68