Table of Contents
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A
B
C
SCHEMATIC DIAGRAM (DSP)
1
Point q (Pin 1 of IC417)
V : 2V/div, H : 50 nsec/div
DC, 1 : 1 probe
3.3
0
0
0V
USB
Point w (Pin 4 of IC430)
V : 1V/div, H : 50 nsec/div
DC, 1 : 1 probe
2
0V
4.7
3.3
4.7
3.3
0
Point e (Pin 74 of IC436)
V : 2V/div, H : 0.1 µsec/div
DC, 1 : 1 probe
0V
3
PC
2.5
COAX IN
3.1
3.1
Point r (Pin 47 of IC475)
V : 2V/div, H : 50 nsec/div
DC, 1 : 1 probe
0
4.1
4.1
0
0
0
PC
4.8
OPT IN
0
0V
4.1
4.1
0
AUX 1
0
4
OPT IN
4.8
2.5
Point t-A (CH1 : Emitter of Q416)
4.8
OPT OUT
Point t-B (CH2 : Collector of Q419)
0
V : 5V/div (CH1), V : 2V/div (CH2)
2.4
DC, 1 : 1 probe, H : 5 sec/div
2.4
2.4
0
0
4.8
CH1
4.8
0
2.4
0
CH2
0
0
0
4.8
0
AC CORD ON
AC CORD OFF
5
IC406 : PQ025EZ5MZP
+2.5V Regulator
4.7
4.6
0.1
1
3
DC INPUT (VIN)
DC OUTPUT (VO)
2.5
I C
2
ON/OFF CONTROL (VC)
4.7
2.5
0
5
GND
4.7
3.4
IC445, 454, 458, 462, 464,
470, 471, 473 : µPC4570G2
6
IC416 : NJM2904M-T1
4.7
3.4
Dual OP Amp
0
0
OUT
1
1
8
+V
CC
–IN
1
2
7
OUT
2
+
–
+
–
+IN
1
3
6
–IN
2
4.7
–V
4
5
+IN
0
4.7
CC
2
0
0
4.7
0
IC401 : TC74HC00AF
4.7
0.1
Quad 2 Input NAND
2.5
7
1.3
A1
1
14
V
DD
1.3
B1
2
13
B4
Y1
3
12
A4
A2
4
11
Y4
B2
5
10
B3
0
0.1
Y2
6
9
A3
0
4.7
0
V
7
8
Y3
SS
0.1
0.1
0
4.7
0.1
3.4
IC418 : TC74HCUO4AF-TP1
0
IC479 : TC74HCTO4AF-T1
0.1
Hex Inverters
3.3
4.7
0
0
8
0
1A
1
14
V
DD
0
0
1Y
2
13
6A
0
4.7
2A
3
12
6Y
0.1
1.3
2Y
4
11
5A
0.1
1.2
3A
5
10
5Y
1.3
1
0.1
3Y
6
9
4A
2.5
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
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
DTC114EKA
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
1.0
3.2
4.6
1.2
4.6
0
1.0
3.3
0
2.4
0
2
3.3
2.4
0
3.3
2.3
0
3.3
2.2
2.3
4.6
2.4
2.3
2.3
0
2.3
2.3
0
0
0.1
0.4
0
0
0
0
0.1
0
0
0
0
4.7
0
0
4.8
0
0.4
0
4.7
4.7
4.7
4.7
4.7
1.8
1.8
1.8
2.8
0
4.8
0
0
0
0
0
2.3
4.7
0
0
0
4.8
2.3
3.7
0
3.7
1.8
0
4M
DRAM
1.2
1.2
1.2
2.5
0
0
0
3.4
0
3.4
1.2
1.3
1.3
1.3
0
AC3D3
0
1.7
3.2
3.4
1.7
1.7
1.7
0
2.5
0
0
0
TC74HC00AF
TC4052BF
CS5360-KSR
AD1854JRSRL
LC75342M-TLM
TC74HCT04AF-T1
TC74HCU04AF-TP1
15
16
µPC4574G2
11
5
8
9
14
28
20
10
30
14
7
16
8
4
1
1
1
1
1
1
G
H
3.3
0
1.3
1.0
1.0
0
2.4
0
0
3.2
2.4
2.4
0
0
0
0
0
4.7
4.8
GATE ARRAY
4.7
0
4.7
0
0
0
0
0
3.4
3.4
0
0
4.7
4.7
4
4.7
2.4
2.2
0
4.9
1.8
4.9
0
0.1
3
2.1
4.7
2.2
4.5
1.4
0
0
4.9
0
2.7
4.6
4.2
CPU
0.1
0.2
4.6
3.6
0.1
0
4.6
0
4.4
4.8
4.7
0
4.7
4.6
0.7
0
4.6
0.1
0
4.6
4.6
3.3
4.6
4.6
4.6
4.6
4.6
0.9
0
0
0
4.7
4.6
4.7
4.9
4.6
4.6
11.9
CIRCUIT CHANGES BY MARKET.
X : NOT USED
A/D CONVERTER
M5M51008CFP-70H
MSM514260C-60JS
MBM29F400BC-55
USS-820DT-DB
25
17
36
25
21
37
24
24
15
16
20
32
40
48
48
13
1
1
1
12
1
I
J
K
SRAM
4M ROM
CENTER/LFE
DAC
0
4.7
0
0.3
0.3
–14.0
0
2.3
1.8
14.8
0
4.7
2.3
0
0
4.7
2.3
0.3
0
4.6
0
0
0.3
0
0
0
0
3.5
0
2.3
0
0.3
4.8
2.5
2.5
2.5
2.5
2.5
0.2
0.3
0
0.3
0
0
–14.0
0
0.3
0
0.3
–14.8
REAR
DAC
0
4.7
0
0.2
0.2
–14.7
0.3
14.8
2.3
1.8
4.7
2.3
0.3
0
0.2
0.3
4.7
2.3
0
4.6
0
0
0.3
0
0
0
0
0
3.5
2.3
0
0.3
4.8
2.5
2.5
2.5
2.5
2.5
0.2
0.3
0
0.2
0.3
0.3
0
0.2
0.3
0.2
–14.7
–14.8
14.8
0
0.3
–14.1
0.3
MAIN
0.3
0.3
0
DAC
0.3
4.7
0
2.3
1.8
4.7
2.3
4.7
2.3
0
4.6
0
0
0
0
0.3
0
0
0
0
3.5
2.3
0
0.3
0.3
0
0.3
4.8
0.3
0.3
–14.8
–14.1
2.5
2.5
2.5
2.5
2.5
0.2
4.7
0.3
4.6
4.7
–14.1
USB
0.3
4.7
4.2
4.2
DAC
4.7
MIX MUTE
0.3
0
4.7
0
14.8
2.2
0
0
4.7
2.3
0
4.7
0
0
4.6
0.3
0
4.7
4.7
0
4.7
0
0.9
0.3
3.5
0
2.3
–14.2
0
0.3
4.8
2.5
2.5
0.3
2.5
2.5
2.5
0.2
0.9
–14.2
0.3
0
0
0
–14.8
0.3
4.6
4.2
4.7
4.2
4.2
14.8
0.3
0.3
0.3
–14.8
0.3
0.3
0.3
14.7
0.2
0.2
0.2
0
0
0
0.1
4.8
4.6
0.3
2.3
0.2
14.7
0.2
0.2
0
2.2
0.2
4.7
0.2
0.2
2.3
2.2
2.3
2.3
2.8
2.4
0.2
4.7
0.2
0.2
0.2
0.2
0.2
–14.7
2.2
0.2
0.2
0.2
–14.7
HD6417014F28
YSS928
LC27287B-TF3
84
57
120
81
132
89
85
56
121
80
133
88
160
41
176
45
112
29
1
28
1
40
1
44
L
M
N
RP-U200
4.7
5.5
4.9
5.5
4.7
TO OPE (1)
P-E42/J40
A-3
5
RESET
A
11.3
7.5
11.3
B
4.7
0
10.6
0
6.9
6.9
0
0
0
2.7
0
SF MUTE
TO MAIN
P-E41/J39
C-3
0.3
–13.9
0.3
0.3
0
–13.9
0.3
TO AM/FM
TUNER
SF MUTE
0.3
–13.9
0.3
0.3
–13.9
0.3
TO MAIN
P-E41/J39
C-6
SF MUTE
0.3
–14.1
0.3
0.3
–14.1
–14.1
0.3
A MUTE
14.7
L
0.2
0.3
0.2
–14.1
0.2
0.2
REC OUT
–14.1
0.3
R
0.2
0.2
0.2
–14.7
L
AUX 2 IN
A MUTE
0.3
14.8
0.3
0.3
0.3
R
0.3
–14.2
0.3
0.3
0.3
0.3
–14.2
0.3
0.3
0.3
0.3
0.3
–14.8
4.7
4.7
0.3
4.7
0.3
L
AUX 1 IN
R
4.7
0.3
0.3
L
4.7
4.7
PC IN
R
INPUT SELECTOR &
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-40/J-38
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