Pioneer SCU-2456-ZRN, SCU-2556-ZRN Service manual
PIONEER CORPORATION 4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153-8654, Japan
PIONEER ELECTRONICS SERVICE INC. P.O.Box 1760, Long Beach, CA 90801-1760 U.S.A.
PIONEER EUROPE N.V. Haven 1087 Keetberglaan 1, 9120 Melsele, Belgium
PIONEER ELECTRONICS ASIACENTRE PTE.LTD. 253 Alexandra Road, #04-01, Singapore 159936
C PIONEER CORPORATION 2000
K-ZZS. FEB. 2000 Printed in Japan
ORDER NO.
CRT2457
SYSTEM CONTROL UNIT
SCU-2456
ZRN X1B/EW
RENAULT
SCU-2456ZRN/X1B/EW
SCU-2556ZRN X1B/EW
CONTENTS
1. SAFETY INFORMATION ............................................2
2. EXPLODED VIEWS AND PARTS LIST.......................2
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM .....9
4. PCB CONNECTION DIAGRAM ................................18
5. ELECTRICAL PARTS LIST ........................................24
6. ADJUSTMENT..........................................................34
7. GENERAL INFORMATION .......................................36
7.1 CONNECTOR FUNCTION DESCRIPTION .........36
7.2 IC ........................................................................38
7.3 OPERATIONAL FLOW CHART...........................40
8. SPECIFICATIONS......................................................41
VEHICLE DESTINATION PRODUCED AFTER PART No. ID No. PIONEER MODEL No.
ESPACE and AVANTIME EUROPE March 2000 6025 40 3834 SCU-2456ZRN/X1B/EW
ESPACE and AVANTIME EUROPE March 2000 6025 40 2759 SCU-2556ZRN/X1B/EW
2
SCU-2456ZRN,2556ZRN
1. SAFETY INFORMATION
This service manual is intended for qualified service technicians; it is not meant for the casual do-it-yourselfer.
Qualified technicians have the necessary test equipment and tools, and have been trained to properly and safely repair
complex products such as those covered by this manual.
Improperly performed repairs can adversely affect the safety and reliability of the product and may void the warranty.
If you are not qualified to perform the repair of this product properly and safely, you should not risk trying to do so
and refer the repair to a qualified service technician.
2. EXPLODED VIEWS AND PARTS LIST
2.1 PACKING
1
2
5
3
6
4
7
3
SCU-2456ZRN,2556ZRN
1 Cover UHD-026
2 Protector UHP-020
3 Polyethylene Bag UEG-012
4 Protector UHP-018
5 Protector UHP-019
6 Protector UHP2266
7 Contain Box(2456ZRN) UHL3974
Contain Box(2556ZRN) UHL3975
Mark No. Description Part No.
- PACKING SECTION PARTS LIST
NOTE:
- Parts marked by “*” are generally unavailable because they are not in our Master Spare Parts List.
- Screws adjacent to ∇ mark on the product are used for disassembly.
4
SCU-2456ZRN,2556ZRN
2.2 EXTERIOR(SCU-2456ZRN)
5
SCU-2456ZRN,2556ZRN
1 Screw BMZ30P060FMC
2 Screw BMZ30P140FMC
3 Chassis CNA2288
4 Case CNB1780
5 Insulator CNM3864
6 Cover CNS4018
7 Screw BMZ30P140FMC
8 Heat Sink CNC7755
9 Tuner Amp Unit UWM6914
10,11 •••••
12 Connector(CN652) CKS3180
13 Connector(CN852) CKS3181
14 Connector(CN701) CKS3182
15 DIN Socket(CN651) CKS3185
16 Connector(CN851) CKS3186
17 DIN Socket(CN653) CKS3189
18 •••••
19 Holder CNC5105
20 Holder CNC5107
21 Holder CNC5433
22 •••••
23 FM/AM Tuner Unit CWE1416
24-28 •••••
29 Holder CNC6555
30 •••••
31 Screw BMZ30P060FMC
32 •••••
33 Fuse(10A) CEK1136
34 Connector(CN551) CKM1258
35 •••••
36 Holder CNC5106
37 Holder CNC5435
38 Holder Unit(CN501) CXA6151
39 IC(IC901) PA2024A
40 Transistor(Q906) 2SA1358
41 •••••
42 IC(IC551) TDA7385
- EXTERIOR SECTION PARTS LIST
Mark No. Description Part No.
6
SCU-2456ZRN,2556ZRN
2.3 EXTERIOR(SCU-2556ZRN)
7
SCU-2456ZRN,2556ZRN
1 Screw BMZ30P060FMC
2 Screw BMZ30P140FMC
3 Chassis CNA2289
4 Case CNB1780
5 Insulator CNM3864
6 Cover CNS4018
7 Screw BMZ30P140FMC
8 Heat Sink CNC7755
9 Tuner Amp Unit UWM6917
10,11 •••••
12 Connector(CN652) CKS3180
13 Connector(CN852) CKS3181
14 Connector(CN701) CKS3182
15 DIN Socket(CN651) CKS3185
16 Connector(CN851) CKS3186
17 DIN Socket(CN653) CKS3189
18 Pin Jack(CN401) CKS3200
19 Holder CNC5105
20 Holder CNC5107
21 Holder CNC5433
22 •••••
23 FM/AM Tuner Unit CWE1416
24-28 •••••
29 Holder CNC6555
30 •••••
31 Screw BMZ30P060FMC
32 •••••
33 Fuse(10A) CEK1136
34 Connector(CN551) CKM1258
35 •••••
36 Holder CNC5106
37 Holder CNC5435
38 Holder Unit(CN501) CXA6151
39 IC(IC901) PA2024A
40 Transistor(Q906) 2SA1358
41 •••••
42 IC(IC551) PAL003A
- EXTERIOR SECTION PARTS LIST
Mark No. Description Part No.
8
SCU-2456ZRN,2556ZRN
9
SCU-2456ZRN,2556ZRN
1
2
34
1
2
34
D
C
B
A
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM
3.1 BLOCK DIAGRAM
SYSTEM
CONTROLLER
IC701(2/2)
PE5157A
B.U
Q906
Q905
Q904
Q908
SW+B
SW+B
BRST
BSET
BINH
REMIN
TELMUT
BSENS
RESET
ASENS
MUTE
KDT1
KDT2
KDT0
KST1
KST2
KST0
SYSPW
AMPMUTE
PEE
23
25
22
28
29
27
7
Q551
SOFT MUTE
Q553
26
25
24
23
22
21
KDT1
KDT2
KDT0
KST1
KST2
KST0
20
FUSE 10A
B.U
SYSPW
15
VDD
B.U
VDD
VDD2
5V REGULATOR/SENSE
IC902 PAJ001A
BUPIN
ASENIN
RSTIN
BSENIN
MUTESENS
12
13
3
9
14
MUTEOUT
1
4
2
5
3
8
76
3
5
1
7
3
5
1
7
SYSTEM
CONTROLLER
IC701(1/2)
PE5157A
42
41
X1
X2
X701
Q704
Q401 Q403
24
1
X501
Q503
Q504
FM LOOP FILTER
Q501
Q502
AM LOOP FILTER
IC501
LC72146M
TUNER PLL
RDS HIC
IC502
CWV1065
17
16
20
19
15
20
FMSD
TUN+B
9
8.4V
REGULATOR
FM+B
7
AM+B
3
VCC
5
2
SYSPW
B.U
4
6
IC901
PA2024A
FM+B
TUN+B
AM+B
14
Q508
VR501
SL
47 52
FMSD
34
TMUTE
SL
FMSD
TUNER-L
Q705
VDD
SWITCH
TRANSMITTER
INTERFACE
VDD2
SWVDD
1
AVPOW
CN852
Rch
HEADPHONE
OUT
2
3
1
Lch
CN851
Q853 Q851
VCC
Lch OUTPUT
VCC (8.5V)
Lch INPUT
SIGNAL GND
HEADPHONE-Lch OUT
Q855
FIX
MUTE
AUDIO-Lch OUT
1
2
AUDIO MIX
IC403
NJM4558MD
5
Lch
IC751
PMJ002A
19
20
ZCINL
FL
OUT
RL
OUT
ELECTRONIC
VOLUME CONTROL
RL
FL
ACCMUT
PEE
MUTE
Q703
MUTE
POWER AMP
RLIN
FLIN
IC551
STBY
MUTE
RLOUT+
RLOUTFLOUTFLOUT+
15
11
17
19
7
9
4
22
15
16
14
13
18
19
27
28
IN1
L5
IN0
L1
IN2
L0
GND
CONC
CONB CONA
BUP1
BUP2
B.U
RLRL+
FLFL+
FR-
FR+
RR-
RR+
GND
ACC
ANT+B
BUP
TELMUTE
12
11
10
987
65432
1
Q702
ACC
SYSPW
MUTE
Q555
RL
FL
14
2
13
8
4
36
54
37
35
38
BSENS
RESET
ASENS
11
5
7
6
2
4
ACC
TELMUTE
FRONT Lch FIX EQUALIZER
REAR Lch FIX EQUALIZER
IC201
NJM4558MD
IC202
NJM4558MD
IC251
NJM4558MD
IC252
NJM4558MD
Q201
253Hz
Q203
117Hz
Q205
5.4kHz
Q251
141Hz
Q253
250Hz
Q255
1.45kHz
3
3
3
3
1
1
11
2
RL-OUT
FL-OUT
VDT/VCK/VST
CN701
CN653
CN652
CN651
CN401
AUX IN
CASSETTE
PLAYER
M-CD
PLAYER
DISPLAY
IR
RECEIVER
2
2
3
5
8
10
7
5
6
CD-L
BSET
BINH
SWVDD
BRST
Q405
DECK
MUTE
DMUTE
TAPE-L
AUX-IN
6
7
IC404
NJM4558MD
REMIN
HEADPHONE
TRANSMITTER
SCU-2556ZRN ONLY
21
IC2
PA4024A
AM+B
Q3
Q201
Q202
AM RF/AGC
FM RF
14
10
CF232
25
T31
Q31
CF51
AM IF
B
FM/AM TUNER UNIT
7
9
18
2
6
21
15
5
13
19
26
25
20
17
FM PROCESSOR
IC1
PA4023B
FM/AM PROCESSOR
23
9
FM MIX
FM IF
FM IF
CF52
FM IF
CF53
15
17
19 47
41
34
638323616 18
1
FM
OSC
AM
OSC
TUN+B
FM+B
FMTV
AMIFC
VCO
AMTV
Q165
T51
2
FMSD
COMP
FMSL
AMSL
31 30
28
33 40
7
43
19
FM/AM
ANTENNA
CN501
14
A
TUNER AMP UNIT
10
SCU-2456ZRN,2556ZRN
1
23
4
1234
D
C
B
A
3.2 OVERALL CONNECTION DIAGRAM(GUIDE PAGE)
Note: When ordering service parts, be sure to refer to “EXPLODED VIEWS AND PARTS LIST” or “ELECTRICAL PARTS
LIST”.
A-a A-b
A-aA-a
A-b A-b
A-b A-b
A-a A-a
Large size
SCH diagram
Guide page
Detailed page
A
A-a
TAPE:-12.1dBs
AM:-22.4dBs
FM:-12.5dBs
M-CD:-3.8dBs
AUX:-15.0dBs
AUX:-15.0dBs
AM:-22.4dBs
FM:-12.5dBs
M-CD:-3.7dBs
TAPE:
-12.1dBs
2R2K(B)
B
11
SCU-2456ZRN,2556ZRN
5
6
78
5
6
78
D
C
B
A
A-b
A
TAPE:-4.6dBs
AM:-8.1dBs
FM:2.4dBs
M-CD:2.9dBs
AUX:-10.0dBs
TAPE:21.8dBs
AM:18.1dBs
FM:28.6dBs
M-CD:29.0dBs
AUX:16.3dBs
A
TUNER AMP UNIT
12
SCU-2456ZRN,2556ZRN
1
23
4
1234
D
C
B
A
TAPE:-12.1dBs
AM:-22.4dBs
FM:-12.5dBs
M-CD:-3.8dBs
AUX:-15.0dBs
AUX:-15.0dBs
AM:-22.4dBs
FM:-12.5dBs
2R2K(B)
B
A-a
A-a
A-b
1
2
345
6
8
7
13
SCU-2456ZRN,2556ZRN
5
6
78
5
6
78
D
C
B
A
M-CD:-3.7dBs
TAPE:
-12.1dBs
A-a
A-a
A-b
8
7
9
10
11
12
131415
16
17
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