Pioneer SCU-2456ZRN Service Manual
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Pioneer SCU-2456ZRN Service Manual

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Service
Manual
SYSTEM CONTROL UNIT
SCU-2456
SCU-2556
VEHICLE
ESPACE and AVANTIME EUROPE
ESPACE and AVANTIME EUROPE
CONTENTS
1. SAFETY INFORMATION ............................................2
2. EXPLODED VIEWS AND PARTS LIST .......................2
4. PCB CONNECTION DIAGRAM ................................18
5. ELECTRICAL PARTS LIST ........................................24
6. ADJUSTMENT..........................................................34
PIONEER CORPORATION
PIONEER ELECTRONICS SERVICE INC.
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
RENAULT
SCU-2456ZRN/X1B/EW
ZRN
DESTINATION
PRODUCED AFTER
March 2000
March 2000
4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153-8654, Japan
P.O.Box 1760, Long Beach, CA 90801-1760 U.S.A.
ZRN
1
X
B/EW
PART No.
ID No.
6025 40 3834
6025 40 2759
7. GENERAL INFORMATION .......................................36
7.2 IC ........................................................................38
7.3 OPERATIONAL FLOW CHART ...........................40
8. SPECIFICATIONS......................................................41
K-ZZS. FEB. 2000 Printed in Japan
ORDER NO.
CRT2457
1
X
B/EW
PIONEER MODEL No.
SCU-2456ZRN/X1B/EW
SCU-2556ZRN/X1B/EW

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  • Page 1 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...
  • Page 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.
  • Page 3 SCU-2456ZRN,2556ZRN NOTE: - Parts marked by “*” are generally unavailable because they are not in our Master Spare Parts List. ∇ mark on the product are used for disassembly. - Screws adjacent to PACKING SECTION PARTS LIST Mark No. Description Part No.
  • Page 4 SCU-2456ZRN,2556ZRN 2.2 EXTERIOR(SCU-2456ZRN)
  • Page 5 SCU-2456ZRN,2556ZRN - EXTERIOR SECTION PARTS LIST Mark No. Description Part No. 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 •••••...
  • Page 6 SCU-2456ZRN,2556ZRN 2.3 EXTERIOR(SCU-2556ZRN)
  • Page 7 SCU-2456ZRN,2556ZRN - EXTERIOR SECTION PARTS LIST Mark No. Description Part No. 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 •••••...
  • Page 8 SCU-2456ZRN,2556ZRN...
  • Page 9 SCU-2456ZRN,2556ZRN 3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM 3.1 BLOCK DIAGRAM TUNER AMP UNIT FM/AM TUNER UNIT Q31 CF51 CF52 CF53 CN501 FM RF FM MIX FM IF FM IF FM IF Q401 Q403 FM/AM ANTENNA SYSTEM CONTROLLER FM/AM PROCESSOR FM PROCESSOR...
  • Page 10 SCU-2456ZRN,2556ZRN 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”. AUX:-15.0dBs Large size SCH diagram AM:-22.4dBs FM:-12.5dBs Guide page Detailed page TAPE:-12.1dBs AM:-22.4dBs FM:-12.5dBs M-CD:-3.8dBs AUX:-15.0dBs...
  • Page 11 SCU-2456ZRN,2556ZRN 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 TUNER AMP UNIT...
  • Page 12 SCU-2456ZRN,2556ZRN...
  • Page 13 SCU-2456ZRN,2556ZRN...
  • Page 14 SCU-2456ZRN,2556ZRN...
  • Page 15 SCU-2456ZRN,2556ZRN...
  • Page 16 SCU-2456ZRN.2556ZRN 3.3 FM/AM TUNER UNIT FM/AM TUNE...
  • Page 17 SCU-2456ZRN,2556ZRN TUNER UNIT...
  • Page 18 SCU-2456ZRN.2556ZRN 4. PCB CONNECTION DIAGRAM TUNER AMP UNIT 4.1 TUNER AMP UNIT NOTE FOR PCB DIAGRAMS 1. The parts mounted on this PCB include all necessary parts for several destination. For further information for respective destinations, be sure FUSE to check with the schematic dia- gram.
  • Page 19 SCU-2456ZRN,2556ZRN HEADPHONE SYSTEM AUX IN SIDE A FMSL3 M-CD PLAYER DISPLAY CASSETTE PLAYER...
  • Page 20 SCU-2456ZRN.2556ZRN TUNER AMP UNIT...
  • Page 21 SCU-2456ZRN,2556ZRN SIDE B...
  • Page 22 SCU-2456ZRN.2556ZRN 4.2 FM/AM TUNER UNIT SIDE A...
  • Page 23 SCU-2456ZRN,2556ZRN SIDE B...
  • Page 24 SCU-2456ZRN,2556ZRN 5. ELECTRICAL PARTS LIST NOTES: - Parts whose parts numbers are omitted are subject to being not supplied. - The part numbers shown below indicate chip components. Chip Resistor RS1/_S___J,RS1/__S___J Chip Capacitor (except for CQS..) CKS.., CCS.., CSZS..=====Circuit Symbol and No.===Part Name Part No.
  • Page 25 CKSRYB103K25 CKSRYB222K50 CKSQYB104K16 CKSRYB222K50 CEJAR47M50 CEJAR33M50 CEJA100M16 CKSQYB473K16 CCSRTH9R0D50 CKSRYB123K25 CCSRTH120J50 CCSRCH471J50 CKSQYB473K16 CKSRYB103K25 CCSRCH471J50 CKSRYB103K25 Unit Number : UWM6914(SCU-2456ZRN) CKSQYB472K50 CCSRCH5R0C50 Unit Name : Tuner Amp Unit CKSQYB104K16 CCSRRH201J50 MISCELLANEOUS CKSRYB223K25 NJM4558MD CKSRYB103K25 NJM4558MD CCSRCH470J50 NJM4558MD CKSQYB223K25 NJM4558MD CKSQYB104K16...
  • Page 26 SCU-2456ZRN,2556ZRN =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- Transistor 2SC2712 RESISTORS Transistor 2SC2712 Transistor DTC343TK RS1/10S473J Transistor DTC343TK RS1/10S473J Transistor DTC343TK RS1/10S182J RS1/10S182J Transistor DTC343TK RS1/10S472J Transistor...
  • Page 27 SCU-2456ZRN,2556ZRN =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- RS1/10S683J RD1/4PU562J RS1/10S122J RD1/4PU0R0J RS1/10S122J RD1/4PU0R0J RS1/10S332J RS1/10S104J RS1/10S332J RS1/10S104J RS1/10S472J RS1/10S391J RS1/10S472J RS1/10S273J RS1/10S683J RS1/10S103J RS1/10S683J RS1/10S103J RS1/10S822J...
  • Page 28 SCU-2456ZRN,2556ZRN =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- RA4C0R0J CKSQYB183K50 RS1/10S102J CKSQYB154K16 RS1/10S105J CKSQYB154K16 RS1/10S471J CKSQYB154K16 RS1/10S823J CKSQYB154K16 RS1/10S0R0J CKSQYB272K50 RS1/10S471J CKSQYB272K50 RS1/10S471J CKSQYB392K50 RS1/10S473J CKSQYB392K50 RS1/10S471J...
  • Page 29 SCU-2456ZRN,2556ZRN =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- CEAT101M16 CEAT100M50 CKSQYB103K50 CEAT100M50 CKSQYB472K50 CKSQYB104K50 CEAT1R0M50 CKSQYB104K50 CEAT1R0M50 CEAT331M10 CEAT1R0M50 CASA680K10 CEAT1R0M50 CEAT101M10 CFTNA224J50 CEAT470M10 CFTNA224J50 CEAT1R0M50 CFTNA224J50...
  • Page 30 SCU-2456ZRN,2556ZRN =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- Transistor DTC343TK RESISTORS Transistor DTC343TK Transistor DTC343TK RS1/10S473J Transistor DTC343TK RS1/10S473J Transistor DTC124EK RS1/10S182J RS1/10S182J Transistor DTA114EK RS1/10S472J Transistor...
  • Page 31 SCU-2456ZRN,2556ZRN =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- RS1/10S683J RS1/10S0R0J RS1/10S122J RS1/10S0R0J RS1/10S122J RS1/10S103J RS1/10S332J RS1/10S0R0J RS1/10S332J RD1/4PU222J RS1/10S472J RD1/4PU222J RS1/10S472J RD1/4PU222J RS1/10S683J RD1/4PU222J RS1/10S683J RD1/4PU562J RS1/10S822J...
  • Page 32 SCU-2456ZRN,2556ZRN =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- RS1/10S102J CAPACITORS RS1/10S473J RS1/10S471J CKSQYB821K50 RS1/10S0R0J CKSQYB821K50 RS1/10S471J CKSQYB274K16 CKSQYB274K16 RS1/10S471J CKSQYB183K50 RS1/10S471J RA4C471J CKSQYB183K50 RA4C471J CKSQYB154K16 RA4C0R0J CKSQYB154K16...
  • Page 33 SCU-2456ZRN,2556ZRN =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- CKLSR473K16 CKSQYB104K50 CKSQYB104K50 CEAT101M16 CKSQYB223K50 CEAT2R2M50 CKSQYB223K50 CEAT100M50 CCSQCH101J50 CEAT100M50 CEAT100M50 CKSQYB104K50 CKSQYB104K50 CKSQYB104K50 CEATR22M50 CEAT331M10 CEAT101M16 CASA680K10 CKSQYB103K50...
  • Page 34 SCU-2456ZRN,2556ZRN 6. ADJUSTMENT Connection Diagram Ω mV Meter (1) Oscilloscope Ω Distortion Meter +14.4V DC Regulated Power Supply Antenna Jack TUNER AMP UNIT FM/AM TUNER UNIT FM/AM TUNER UNIT (TOP VIEW) Pin26 FMSL3 VR501 DC V Pin 19 Meter(2) DC V...
  • Page 35 SCU-2456ZRN,2556ZRN FM ADJUSTMENT Modulation M:MONO MOD., 400Hz 30%(22.5kHz Dev.) or 400Hz 100%(75kHz Dev.) S:STEREO MOD., 1kHz, L or R=30%(20.25kHz+7.5kHz Dev.) NOTE:Before proceeding to further adjustments after switching power ON, let the tuner run for ten minutes to allow the circuits to stabilize.
  • Page 36 SCU-2456ZRN,2556ZRN 7. GENERAL INFORMATION 7.1 CONNECTOR FUNCTION DESCRIPTION AUX (SCU-2556ZRN) HEADPHONE TRANSMITTER LEFT CHANNEL ANTENNA RIGHT CHANNEL COMMON 13 12 11 10 12 11 10 M-CD PLAYER CASSETTE PLAYER HEADPHONE TRANSMITTER DISPLAY AUDIO Lch SHIELD AUDIO L- LEFT CHANNEL AUDIO Rch SHIELD...
  • Page 37 SCU-2456ZRN,2556ZRN TRANSMITTER INTERFACE +8.5V RIGHT OUT TEL MUTE LEFT OUT +BACKUP COMMON RIGHT IN +ACC LEFT IN...
  • Page 38 SCU-2456ZRN,2556ZRN 7.2 IC Pin Functions(PE5157A) Pin No. Pin Name Format Function and Operation avpow A Vref watching terminal Beep tone output brxen Communication reception enable input/output binh Communication data input inhibit Model select auxmute AUX mute MUTE Synthesis mute output...
  • Page 39 SCU-2456ZRN,2556ZRN Pin No. Pin Name Format Function and Operation Serial clock output for PLL IC Communication data input Communication data output bsck Communication serial clock input/output *PE5157A Output Format Meaning C MOS output IC's marked by* are MOS type. Be careful in handling them because they are very liable to be damaged by electrostatic induction.
  • Page 40 SCU-2456ZRN,2556ZRN 7.3 OPERATIONAL FLOW CHART Power ON VDD=5V pin 40 bsens pin 37 asens pin 38 brst←H pin 13 Starts communication with slave. Source keys operative Source ON SYSPW←H pin 15 Completes power-on operation. (After that, proceed to each source operation.)
  • Page 41 Power source ..14.4 V DC (10.5 – 16.0 V allowable) Grounding system ........Negative type Weight ..............1.1 kg Amplifier Maximum power output (SCU-2456ZRN) ....15 W (SCU-2556ZRN) ....40 W Rated power output (SCU-2456ZRN)......10 W (SCU-2556ZRN) ...... 15 W Load impedance ......

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