© 2001-5 PRINTED IN JAPAN
B51-7776-00 (N) 1734
CD CASSETTE DSP RECEIVER
DPX-4020
SERVICE MANUAL
AUD
DIGITAL
SIGNAL
PROCESSOR
D
S
P
EQ
FM+
DISC
B NR
SCRL
1
SCN
2
RDM
3
REP
45
M. RDM
6
ATT
USER
B.S
METAL
DISP
DIGITAL
PULSE
AXIS
CONTROL
NAME.S
PWR
OFF
FNC
CD-R/CD-RW
AVAILABLE
TI
SRC
S.A
CD CASSETTE DSP RECEIVER
OPEN
DPAC
COMPACT
DIGITAL AUDIO
DOLBY B NR
Screw set
(N99-1701-05) : M type
DC cord
(E30-4939-05)
Screw set
(N99-1711-05) : K type
Knob (VOL)
(K25-1302-03)
Escutcheon assy
(B07-3046-04)
Front glass
(B10-4063-01) : K type
(B10-4064-01) : M type
Escutcheon assy
(B07-3047-04) : K type
Panel assy
(A64-2383-02) : K type
(A64-2384-02) : M type
Knob (CD EJ)
(K24-3716-03) : M type
(K24-3717-03) : K type
Badge
(B43-1284-04)
Dressing panel
(A21-4102-02)
DPX-4020
2
SWITCH UNIT
(X25-8970-00)
DOLBY UNIT
(X87-3040-00)
CASSETTE MECHA
CD MECHA
(X16-1250-00)
SUB PANEL UNIT
SYSTEM u-CON
MN101C15
VOL
BASS
INPUT
SEL
ISO
NC. MPX
PWR AMP
FRONT
SP OUT
REAR
SP OUT
MUTE
TC4066FB
ANALOG SW
TA8263BH
PRE OUT
FRONT
FRONT/REAR/N-F (J TYPE)
PRE OUT
E VOL, TONE, NC, MPX
TDA7407
TRE
MD/CD
CHANGER
DSP
M65849BFP
VFD
PANEL u-CON
REMOCON
KEY MATRIX
VOL
SOFT
MUTE
MN101C10
AMP-CTRL
ANT CON
CXA2560Q
LB1641
F/E
ANT.
PLAY
HEAD
MODE
PACK
DET
STBY
PACK
IN
TAKEUP REEL
SUPPLY REEL
REELT
REELS
MID
RST SW
BPF
ANALYZER
SPECTRUM
BA3129F
SW OP
MUTE
(K,M) TYPE ONLY
REAR/N-F (K,M TYPE)
NAVI MUTE
SMALL DET
ACC DET
BU DET
5V AVR
FM8V SW
AM8V SW
P CON
5V AVR
5V SW
MOTOR SW
MAIN
A8V AVR
BU5V AVR
+7.5V
CD SRV
AVR
DC/DC +B
SW
DC/DC +B
SD
A
SCL
RESET
FSD OUT
FM SD
PWR
SVR
PWR
STBY
PWR
TEST
MUTE
AUDIO OUT
SCL
FM SD
FSD
SDA
AM
ANT
FM
ANT
AUD +B
FM +B
AM +B
F/E 5V
SW1-3
MRST
CD MOTOR
ANT CON
P CON
LINE MUTE
ILLUMI
ACC
B. U
GND
P MUTE
BU DET
ACC DET
ILL CON
LANP
P CON
BU 5V
CD CH
+6dB
0dB
DSP 5V
FL +B
BU 5V
LED +B
AM
FM
FM +B
AM +B
LED +B
F/E 5V
B. U
B.U
BU 5V
AUD +B
SDA
SCL
PON 5V
B
UZZ
DSP STBY
DSP DATA
DSP CLK
(-0.5dB)
AUDIO OUT
AMP CTRL
AMP-CTRL
P CON
MOTOR +B
CD SRV +B
DSP 5V
AUDIO +B
BUZZ
PWR STBY
PWR TEST
PWR SVR
SCL
SD
A
FRONT
REAR
FM
AM
+10dB
P ANT
BU 5V
PN
SC
CON
PN
SC
REQ
PN
SC
D
A
T
A
PN
MC
REQ
CD MUTE
CD LO/EJ
CD MSTOP
F-IN(L)
VREF
R-IN(L)
F-IN(R)
R-IN(R)
SUB
MOTOR
DRIVER
SUB
MAIN
REV
Rch
Rch
FWD
Lch
REV
Lch
FWD
A
OUT
AM : +3dB
CAS : +0dB
FM : +1dB
CD CH : +2dB
CH DATA H
CH CON
CH REQ H
CH REQ C
CH DATA C
CH CLK
RESET
MUTE
CD SRV +B
BU 5V
AUD +B
BU 5V
AND +B
CD SRV +B
MOTOR +B
AUD +B
SW
INPUT
PREOUT
NON-F
A
D
PWR
MUTE
DSP-DATA
DSP-STBY
DSP-CLK
P ON
P ANT
BU DET
ACC DET
AMP CTRL
P MUTE
FM
u MUTE
LAMP
ILL CON
AM
MIAN-M
PN
MC
CLK
PN
MC
D
A
T
A
C
SUB
M-
C
SUB
M+
R
REEL
F
REEL
C
MODE
3
C
MODE
2
C
MODE
1
C
MUTE
C
MSC
C
MUSIC
C
F/R
C
MTL
C
NR
SW1-3
MRST
CD MSTOP
CD MOTOR
CD LO/EJ
CD MUTE
MPX
OUT
DSP OFF
-4dB
DSP ON
-4dB
-12dB
+15dB
CAS
PWR MUTE
+10.6dB
RESET
PN MC REQ
PN MC CLK
PN MC DATA
PN SC CON
PN SC DATA
PN SC REQ
REMOCON
AUD +B
FRONT
REAR
PREOUT
NON-FAD
(-0.5dB)
CPH3105
CPH3105
PON 5V
BU 5V
MAIN-M
P ON
SUB PANEL
CH REQ H
CH CLK
CH DATA C
CH REQ C
CH DATA H
CHCON
M
M
CAS : 440mV
AM : 170mV
FM : 340mV
CD CH : 1200mV
AM : 170mV
FM : 340mV
CD : 1200mV
CD CH : 956mV
FM : 480mV
CAS : 277mV
AM : 151mV
CAS : 440mV
CD CH : 1200mV
AM : 170mV
FM : 680mV
DSP OFF
AM : 477mV
FM : 1516mV
CAS : 1557mV
CD CH : 3010mV
(STADIUM)
AM : 202mV
CAS : 370mV
FM : 680mV
CD CH : 1270mV
DSP ON
AM : 120mV
(STADIUM)
FM : 381mV
CAS : 220mV
CD CH : 756mV
DSP ON
CD CH : 2858mV
FM : 1431mV
AM : 450mV
CAS : 440mV
BLOCK
DIAGRAM
DPX-4020
3
G SYNTHESIZER UNIT (X14-6710-XX)
COMPONENTS DESCRIPTION
Ref.No.
Component Name
Application/Function
Operation/Condition/Compatibility
IC1
MN101C15FCP
System micom
IC2
TDA7407
Electronic volume
IC3
TC4066BF(N)
Analog SW
Voice signal input switching (CD,.MD,CASSETTE)
IC4
M65849BFP
DSP IC
IC5
BA3129F
Switching ope-amplifier
Voice signal output switching (FRONT,.REAR)
IC7
TA8263BH
PWR IC
IC8
LB1641
Motor driver
For cassette mechanism sub-motor
IC9
PST9135NR
Reset IC
Reset 3.5V voltages
IC10 TC7W02FU
Logic IC(OR)
Rogic circuit for MUTE
IC11 M5237ML
Power source IC
Reg for A8V
Q1
2SC4081
Power source SW for F/E VDD 5V
ON:F/E VDD 5V output
Q2
CPH3105
Power source SW for FM
ON:FM+B 8V output
Q3
CPH3105
Power source SW for AM
ON:AM+B 8V output
Q4
FMG1A
Power source control SW for FM/AM
ON:FM+B/AM+B 8V output
Q101 2SB1443
Power source SW for main motor
ON:Main motor ON
Q102 DTC144EK
Power source control SW for main motor
ON:Main motor ON
Q201 DTC143TK
MUTE SW
Q202 DTC143TK
MUTE SW
ON:MUTE
Q301 DTC143TK
MUTE SW
Q302 DTC143TK
MUTE SW
Q401 DTC124EUA
SW for electronic volume mute
ON:MUTE
Q402 FMC2A
SW for analog switch control
Q403 DTC144EUA
SW for switching ope-amplifier control
Q404 DTC144EUA
SW for power IC mute terminal contorol
ON:Temperature protection OFF (Test mode)
Q405 DTA114EUA
Control terminal for MUTE (preout)
ON:MUTE
Q406 DTA114EUA
Control terminal for MUTE (preout)
ON:MUTE
Q407 DTA114EUA
SW for electronic volume mute
ON:MUTE
Q601 DTC114YUA
SW for system micom reset
ON:REEST
Q602 DTA124EUA
SW for RESET IC output
ON:REEST
Q701 DTC144EUA
SW for BU serge detection
ON:Serge(power down)
Q702 FMW1
SW for BU/ACC detection
ON:Power down
Q703 DTC144EUA
SMALL detection SW
ON:SMALL ON
Q705 DTA124EUA
SW for external amplifier control
Q706 2SB1277(Q,R)
SW for P-CON
ON:P-CON output
Q707 2SA1037K
SW for P-CON over-electric current protect ON:Stop P-CON output
Q708 DTA124EUA
Control SW for P-CON over-electric current protect ON:Stop P-CON output
Q709 DTC114YUA
Control switch for P-CON
ON:P-CON output
Q710 2SB1277(Q,R)
SW for P-ANT
ON:P-ANT output
Q711 DTC114YUA
Control switch for P-ANT
ON:P-ANT output
Q712 2SB1548(P)
Power source switch for BU 5V
Q713 2SC4081
Power source switch for BU 5V (Darling ton)
Q714 IMD16A
Power source switch for PON 5V
ON:PON 5V output
Q715 FMC2A
Power source control switch for analog+B
ON:Analog+B 8V output
Q716 2SB1548(P)
Power source switch for analog+B
ON:Analog+B 8V output
Q717 2SD1766
Power source switch for DSP+B
ON:DSP+B 5V output
Q718 FMC2A
Power source control switch for servo+B
ON:Servo+B 7.5V output
Q719 2SB1548(P)
Power source switch for servo+B
ON:Servo+B 7.5V output
Q720 2SC4081
Power source switch for servo+B(Darling ton)
ON:Servo+B 7.5V output
Q724 2SB1548(P)
Power source switch for servo+B
ON:Servo+B 7.5V output
Q901 FMC3A
Power source control switch for ILLUMI+B
ON:ILLUMI+B 14.4V output
Q902 2SB1446
Power source switch for ILLUMI+B (Darling ton) ON:ILLUMI+B 14.4V output
Q903 2SC4081
Power source switch for ILLUMI+B
ON:ILLUMI+B 14.4V output
DPX-4020
4
G SUB CIRCUIT UNIT (X16-1250-00)
Ref.No.
Component Name
Application/Function
Operation/Condition/Compatibility
IC1
SBX-3050
Remote control IC
Light receive port of remote controller
G DOLBY UNIT (X87-3040-00)
Ref.No.
Component Name
Application/Function
Operation/Condition/Compatibility
IC1
CXA2560Q
DOLBY IC
PRE-AMP/DOLBY-EQ
Q1
KRC103S
Between-music detection level adjustment FF/REW
FF/REW ON
G SWITCH UNIT (X25-8970-00)
Ref.No.
Component Name
Application/Function
Operation/Condition/Compatibility
IC1
MN101C10AAL
Panel micom
Display mechanism & key matrix control
IC2
BA3830F
BAND PASS IC (Spectrum analyzer)
Signal data from X14 are displayed with
strength of frequency
Q1
DTC114EUA
RST switch
H:RST
Q2
2SK3018
Analog signal AGC
Auto gain control of analog signal
Q3
UMC3N
SW5V
H:ON
Q4
FMC4A
SW for VFD logic power source
H:ON
Q5
DTC114EUA
VFD branking control
H:ON
COMPONENTS DESCRIPTION
DPX-4020
5
G SYSTEM µ-COM (IC1:X14-6710-XX) MN101C15FCP
Pin.No.
Pin name
I/O
Description
Processing Operation
1
VREF-
-
Connected to GND.
2
NC
I
Not used. Connected to GND.
3
FM_SD
I
FM SD input.
4
F_REEL
I
Reel pulse (FWD) detection.
Hi-Z
5
R_REEL
I
Reel pulse (REV) detection.
Hi-Z
6
NC
I
Not used. Connected to GND.
7
ACC_DET
I
Acc detection input.
8
SMALL
I
SMALL detection input.
9
LINE MUTE
I
LINE MUTE detection input.
10
VREF+
-
A/D converter. Reference voltage input terminal.
11
VDD
-
Main power input.
12
X' Tal (8.38)
O
Connected to main clock.
13
X' Tal (8.38)
I
Connected to main clock.
14
VSS
-
Connected to GND.
15
XI
I
Connected to GND.
16
XO
O
Open.
17
MMOD
I
Connected to GND.
18
PN_MC_DATA
O
Data output to panel micom.
19
PN_SC_DATA
I
Data input from panel micom.
20
PN_MC_CLK
O
Clock output to panel micom.
21
CH_DATAH
O
Data output to CD-CH.
22
CH_DATAC
I
Data input from CD-CH.
23
CH_CHCLK
I/O
Previous bus : Data input from CD-CH. New bus : Data output to CD-CH.
24
BEEP
O
Beep output.
25
RESET
I
System reset.
26
CH_REQH
O
Send request output to CD-CH.
27
CH_CON1
-
Operation control of CD-CH1.
28
CH_CON2
-
Operation control of CD-CH2.
29
P_ANT
-
Power ANT control.
30
P_CON
-
External amplifier power control.
31
BU_DET
I
Back up detection input.
32
CH_REQC
I
Send request input from CD-CH.
33
PN_SC_REQ
I
Send request input from panel micom.
34
SEL1
-
IC2$ noise cancellation selection.
35
SEL2
-
IC2$ noise cancellation selection.
36
SDA
I/O
I2C data input/output.
37
NC
-
Not used. (Open)
38
SCL
O
I2C clock output.
39
P_ON
-
Internal power control.
40
LAMP
-
Key illumination control.
MICROCOMPUTER'S TERMINAL DESCRIPTION