Yamaha DP-U50, Service Manual

Page: 28 / 46

A B C D E F G H
1
2
3
4
5
6
DP-U50
E-28/J-26 E-29/J-27
■
PRINTED CIRCUIT BOARD (Foil side)
1
2
3
4
1
40
41 80
81
120
121 160
1
24
25 48
1
28
29
56
57 84
85
112
1 4
5 8
1 7
8 14
1 20
21
40
1
44
45
88
89
132
133 176
1
12
13
24
25 36
37
48
1 7
8 14
1
14 15
28
1
14 15
28
1
10
11 20
1
4 5
8
1
4 5
8
1
4
5
8
1 15
16 30
1
4
5 8
U, C, A, B, G only
DSP P.C.B.
(Lead Type Device)
PC IN
AUX 1 IN
AUX 2 IN
PRE OUT
ANALOG
USB
COAX IN
OPT IN
AUX 1
OPT IN
OPT OUT
DIGITAL
PC
E_B
KEY0
+5S
LED A1
LED TU
+5M
CCBDI
FLCE
REM
E_A
P SW
LED PC
LED A2
/ICD
GNDD
CCBCLK
GNDD
FR
OM :
OPERA
TION (1)
T MUTE
SW MUTE
CLK
VOLCE2
PRT I
SP ON
A MUTE
POW
T-FAULT
PHONE
DATA
VOLCE1
PRT DC
E
PS
FR
OM :
MAIN
AGND
RLCH
RRCH
AGND
AGND
+9V
-15V
DGND
+5D SW
CENTER
LFE
AGND
RCH
LCH
+5A
+12V
+15V
AC DET
+5D SUB
Point q (Pin 1 of IC417)
V : 2V/div, H : 50 nsec/div
DC, 1 : 1 probe
0V
Point w (Pin 4 of IC430)
V : 1V/div, H : 50 nsec/div
DC, 1 : 1 probe
0V
Point e (Pin 74 of IC436)
V : 2V/div, H : 0.1
µ
sec/div
DC, 1 : 1 probe
0V
Point
r
(Pin 47 of IC475)
V : 2V/div, H : 50 nsec/div
DC, 1 : 1 probe
0V
Ref. No. Location
D413 C2
D414 C2
D415 C2
D416 C2
D417 C2
D418 C2
D419 C2
D420 C2
D437 C5
D440 D2
D441 D2
D442 D2
D443 D2
D444 D2
D445 D2
D446 D2
D447 D2
Ref. No. Location
IC401 D5
IC406 C3
IC412 D3
IC413 C5
IC416 D5
IC417 C4
IC418 D4
IC430 D3
IC432 C4
IC436 D5
IC438 C5
IC439 C3
IC440 C3
IC454 C2
IC458 C2
IC471 D2
IC473 D1
IC474 D2
IC475 D3
IC477 C2
IC478 D2
●
Semiconductor Location
Ref. No. Location
Q401 D3
Q402 C2
Q403 C2
Q404 C2
Q405 C2
Q410 C1
Q411 C2
Q417 C1
Q418 C2
Q420 D3
Q421 D3
Q423 D2
Q424 D2
Q427 D2
Q428 D2
NOTE)
The DSP P.C.B. actually has a four-layer pattern structure (part face pattern, internal pattern
1, internal pattern 2 and solder face pattern) but it is shown as "part face p solder
face pattern" in this diagram.
NOTE)
DSP P.C.B.は、4層パターン構造（部品面パターン、内層1パターン、内層2パターン、ハンダ面パ
ターン）ですが、本図のDSP P.C.B.は、部品面パターン＋ハンダ面パターンを表記しております。