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Pioneer keh-p4900 Service Manual

Multi-cd control high power cassette player with fm/am tuner
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3 7 63 1515 0
Service
Manual
MULTI-CD CONTROL HIGH POWER CASSETTE PLAYER WITH FM/AM TUNER
KEH-P490
KEH-P4900
KEH-P4950
- This service manual should be used together with the following manual(s):
Model No. Order No.
TE
L 13942296513
CX-1011
CRT2406
-
This service manual does not describe the CD test mode.
For the operations in the CD test mode, refer to the CD player's Service manual.
CONTENTS
1. SAFETY INFORMATION ............................................2
2. EXPLODED VIEWS AND PARTS LIST .......................2
4. PCB CONNECTION DIAGRAM ................................24
www
5. ELECTRICAL PARTS LIST ........................................33
6. ADJUSTMENT..........................................................40
.
PIONEER CORPORATION
PIONEER ELECTRONICS SERVICE INC.
PIONEER ELECTRONIC [EUROPE] N.V.
PIONEER ELECTRONICS ASIACENTRE PTE.LTD. 253 Alexandra Road, #04-01, Singapore 159936
C PIONEER CORPORATION 1999
Mech. Module
Remarks
3L
Cassette Mech. Module:Mech.Description and Greasing, Disassembly, Adjustment
x
ao
u163
y
i
4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153-8654, Japan
P.O.Box 1760, Long Beach, CA 90801-1760 U.S.A.
Haven 1087 Keetberglaan 1, 9120 Melsele, Belgium
http://www.xiaoyu163.com
2 9
8
KEH-P490/X1M/UC
X1M/UC
X1M/ES
Q Q
3
6 7
1 3
1 5
7. GENERAL INFORMATION .......................................42
7.1 DISASSEMBLY ...................................................42
7.2 PARTS .................................................................43
7.2.1 IC.................................................................43
7.2.2 DISPLAY .....................................................47
co
8. OPERATIONS AND SPECIFICATIONS.....................48
.
9 4
2 8
ORDER NO.
CRT2398
X1M/UC
0 5
8
2 9
9 4
2 8
m
K-ZZB. OCT. 1999 Printed in Japan
9 9
9 9

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  • Page 1: Table Of Contents

    PIONEER ELECTRONICS SERVICE INC. P.O.Box 1760, Long Beach, CA 90801-1760 U.S.A. PIONEER ELECTRONIC [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 1999 K-ZZB. OCT. 1999 Printed in Japan http://www.xiaoyu163.com...

  • Page 2: Safety Information

    http://www.xiaoyu163.com KEH-P490,P4900,P4950 3 7 63 1515 0 1. SAFETY INFORMATION CAUTION 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 - 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 Part No. Mark No. Description KEH-P490/X1M/UC KEH-P4900/X1M/UC KEH-P4950/X1M/ES Accessory Assy CEA2350 CEA2350 CEA2350 Spring CBH1650...
  • Page 4 http://www.xiaoyu163.com KEH-P490,P4900,P4950 2.2 EXTERIOR 3 7 63 1515 0 L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 5 See Contrast table(2) Cassette Mechanism Module 34 Button CAC4836 69 Screw ISS26P055FUC 35 Spring CBH1834 (2) CONTRAST TABLE KEH-P490/X1M/UC, KEH-P4900/X1M/UC and KEH-P4950/X1M/ES are constructed same except for the following: Part No. Mark No. Description KEH-P490/X1M/UC KEH-P4900/X1M/UC KEH-P4950/X1M/ES Tuner Amp Unit...
  • Page 6 http://www.xiaoyu163.com KEH-P490,P4900,P4950 3 7 63 1515 0 2.3 CASSETTE MECHANISM MODULE L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 7 http://www.xiaoyu163.com KEH-P490,P4900,P4950 3 7 63 1515 0 - CASSETTE MECHANISM MODULE SECTION PARTS LIST Mark No. Description Part No. Mark No. Description Part No. 1 Screw BSZ20P040FMC 46 Pinch Roller ENV1518 2 Washer CBF1037 47 Pinch Holder Unit EXA1583 3 Washer CBG1003 48 Pinch Roller ENV1518...
  • Page 8 http://www.xiaoyu163.com KEH-P490,P4900,P4950 3 7 63 1515 0 L 13942296513 u163 http://www.xiaoyu163.com...

  • Page 9: Block Diagram And Schematic Diagram

    http://www.xiaoyu163.com KEH-P490,P4900,P4950 3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM 3 7 63 1515 0 3.1 BLOCK DIAGRAM TUNER AMP UNIT FM/AM TUNER UNIT Q31 CF51 CF52 CF53 CN402 FM RF FM MIX FM IF FM IF FM IF FM/AM TUNER Lch ANTENNA Q903 FM/AM PROCESSOR...

  • Page 10: Electrical Parts List

    http://www.xiaoyu163.com KEH-P490,P4900,P4950 3.2 OVERALL CONNECTION DIAGRAM(GUIDE PAGE) 3 7 63 1515 0 Note: When ordering service parts, be sure to refer to “EXPLODED VIEWS AND PARTS LIST” or “ELECTRICAL PARTS LIST”. Large size SCH diagram FM/AM TUNER UNIT Guide page Detailed page L 13942296513 u163...
  • Page 11 http://www.xiaoyu163.com KEH-P490,P4900,P4950 3 7 63 1515 0 TUNER AMP UNIT L 13942296513 CEK1136 u163 http://www.xiaoyu163.com...
  • Page 12 http://www.xiaoyu163.com KEH-P490,P4900,P4950 3 7 63 1515 0 L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 13 http://www.xiaoyu163.com KEH-P490,P4900,P4950 3 7 63 1515 0 L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 14 http://www.xiaoyu163.com KEH-P490,P4900,P4950 3 7 63 1515 0 L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 15 http://www.xiaoyu163.com KEH-P490,P4900,P4950 3 7 63 1515 0 L 13942296513 u163 http://www.xiaoyu163.com...

  • Page 16: Http://Www.xiaoyu163.Com 3

    KEH-P490,P4900,P4950 3 7 63 1515 0 3.3 FM/AM TUNER UNIT - CWE1467(KEH-P490/X1M/UC, KEH-P4900/X1M/UC) FM/AM TUNER UN L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 17 http://www.xiaoyu163.com KEH-P490,P4900,P4950 3 7 63 1515 0 ER UNIT L 13942296513 u163 http://www.xiaoyu163.com...

  • Page 18: Http://Www.xiaoyu163.Com

    http://www.xiaoyu163.com KEH-P490,P4900,P4950 3 7 63 1515 0 - CWE1486(KEH-P4950/X1M/ES) FM/AM TUNER UN L 13942296513 u163 http://www.xiaoyu163.com...

  • Page 19: Keh-P490,P4900,P4950

    http://www.xiaoyu163.com KEH-P490,P4900,P4950 3 7 63 1515 0 R UNIT L 13942296513 u163 http://www.xiaoyu163.com...

  • Page 20: Http://Www.xiaoyu163.Com

    http://www.xiaoyu163.com KEH-P490,P4900,P4950 3 7 63 1515 0 3.4 KEYBOARD UNIT L 13942296513 u163 http://www.xiaoyu163.com...

  • Page 21: Keh-P490,P4900,P4950 9 4 2 8 9

    http://www.xiaoyu163.com KEH-P490,P4900,P4950 3 7 63 1515 0 KEYBOARD UNIT DISP L 13942296513 CLOCK PAUSE/BSM u163 http://www.xiaoyu163.com...

  • Page 22: Cassette Mechanism Module

    http://www.xiaoyu163.com KEH-P490,P4900,P4950 3 7 63 1515 0 3.5 CASSETTE MECHANISM MODULE DECK UNIT CN252 C256 R258 C253 330P Rev-L R283 0R0 R256 220 R273 C254 330P Rev-R MSMODE PBFB2 R284 0R0 R272 DRSW PBRIN2 R290 R271 IC251 PBGND TAPESW Fwd-R R282 0R0 R274 MUTESW...
  • Page 23 http://www.xiaoyu163.com KEH-P490,P4900,P4950 3 7 63 1515 0 M1 MOTOR UNIT (MAIN MOTOR) EXA1491 CN255 CN256 REEL SENSE CN253 EGN1 EGN1004 R373 MODE ESG1007 MECHANISM DRIVER load S1 LOAD ESG1007 R290 REEL SENSE C403 R068 R403 82K CN254 C402 R402 18K 3900P C401 R401...

  • Page 24: Pcb Connection Diagram

    http://www.xiaoyu163.com KEH-P490,P4900,P4950 3 7 63 1515 0 4. PCB CONNECTION DIAGRAM 4.1 TUNER AMP UNIT CORD ASSY 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 to check with the schematic dia- gram.
  • Page 25 http://www.xiaoyu163.com KEH-P490,P4900,P4950 3 7 63 1515 0 SIDE A IP-BUS ANTENNA L 13942296513 CN251 u163 http://www.xiaoyu163.com...
  • Page 26 http://www.xiaoyu163.com KEH-P490,P4900,P4950 3 7 63 1515 0 TUNER AMP UNIT L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 27 http://www.xiaoyu163.com KEH-P490,P4900,P4950 3 7 63 1515 0 SIDE B L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 28 http://www.xiaoyu163.com KEH-P490,P4900,P4950 3 7 63 1515 0 4.2 FM/AM TUNER UNIT SIDE A L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 29 http://www.xiaoyu163.com KEH-P490,P4900,P4950 3 7 63 1515 0 SIDE B L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 30 http://www.xiaoyu163.com KEH-P490,P4900,P4950 4.3 KEYBOARD UNIT 3 7 63 1515 0 SIDE A SIDE B L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 31 http://www.xiaoyu163.com KEH-P490,P4900,P4950 3 7 63 1515 0 4.4 CASSETTE MECHANISM MODULE DECK UNIT CN602 SIDE A L 13942296513 SIDE B DECK UNIT HEAD ASSY IC,Q VR302 CN254 CN255 CN253 CN252 IC253 IC251 Q351 Q352 VR301 u163 CN256 http://www.xiaoyu163.com...
  • Page 32 http://www.xiaoyu163.com KEH-P490,P4900,P4950 3 7 63 1515 0 REEL SENSE PCB LOAD SW 70µs SW MODE SW CN256 EGN1 CN253 REEL SENSE L 13942296513 u163 http://www.xiaoyu163.com...

  • Page 33: Electrical Parts List

    Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- Unit Number : CWM7021 Diode HZS9L(A2) (KEH-P490/X1M/UC) Diode 1SR139-400 (KEH-P4900/X1M/UC) Unit Number : CWM7025 Diode 1SR139-400 (KEH-P4950/X1M/ES) Unit Name : Tuner Amp Unit Inductor See Contrast table Ferri-Inductor LAU2R2K MISCELLANEOUS Ferri-Inductor LAU2R2K...
  • Page 34 http://www.xiaoyu163.com KEH-P490,P4900,P4950 3 7 63 1515 0 =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- RS1/10S102J RD1/4PU472J RS1/8S0R0J RS1/10S222J RS1/10S562J RS1/10S473J RS1/10S473J RS1/10S223J RS1/10S152J RS1/10S223J RS1/10S472J RS1/10S473J RS1/10S472J RD1/4PU102J RS1/10S472J RD1/4PU473J...
  • Page 35 CKSQYB103K50 CKSQYB473K50 CEJA220M6R3 CKSQYB103K50 CKSQYB103K50 4.7µF/16V CCH1250 CKLSR473K16 CKSQYB154K16 CONTRAST TABLE of TUNER AMP UNIT KEH-P490/X1M/UC, KEH-P4900/X1M/UC and KEH-P4950/X1M/ES are constructed same except for the following: L 13942296513 Part No. KEH-P490/X1M/UC KEH-P4950/X1M/ES Symbol and Description KEH-P4900/X1M/UC FM/AM Tuner Unit CWE1467...
  • Page 36 http://www.xiaoyu163.com KEH-P490,P4900,P4950 3 7 63 1515 0 =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- Radiator 918.5Hz CSS1365 CAPACITORS Crystal Resonator 10.26MHz CSS1111 Semi-fixed 150kΩ(B) CCP1213 CCSQCH6R0D50 CCSRCK2R0C50 RESISTORS CCSRCH820J50 CCSRCH820J50...
  • Page 37 http://www.xiaoyu163.com KEH-P490,P4900,P4950 3 7 63 1515 0 =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- CCSRCH560J50 Ceramic Filter CTF1348 CKSQYB104K16 Radiator 918.5Hz CSS1365 CCSRCH101J50 Crystal Resonator 10.26MHz CSS1111 CEJA470M6R3 Semi-fixed 150kΩ(B) CCP1213...
  • Page 38 CEJAR33M50 CCSRTH120J50 CKSQYB473K16 CKSRYB333K16 CCSRCH471J50 CKSQYB473K16 CKSRYB103K25 CCSRCH471J50 CKSRYB103K25 CKSQYB472K50 Unit Number : CWM7022 (KEH-P490/X1M/UC) CCSRCH5R0C50 Unit Number : CWM7024 (KEH-P4900/X1M/UC) (KEH-P4950/X1M/ES) CKSQYB104K16 Unit Name : Keyboard Unit CCSRRH201J50 CKSRYB223K25 MISCELLANEOUS CKSRYB103K25 L 13942296513 CCSRCH470J50 IC 1901 PD6278C IC 1902...
  • Page 39 CKSRYB331K50 1904 RS1/10S473J CKSRYB331K50 1905 RS1/10S473J CKSRYB103K50 1906 RS1/10S473J CKSRYB103K50 1907 RS1/10S473J CKSRYB104K16 1908 RS1/10S473J CEJA220M16 1909 RS1/10S473J CKSRYB104K16 1910 (KEH-P4900/X1M/UC) RS1/10S473J CKSRYB104K16 (KEH-P4950/X1M/ES) RS1/10S473J CCSRCH101J50 1911 (KEH-P490/X1M/UC) RS1/10S121J CKSYB224K25 1912 (KEH-P490/X1M/UC) RS1/10S2R2J CKSRYB392K50 CKSRYB103K50 CAPACITORS CKSRYB103K50 1902 CKSQYB104K16 CKSYB104K50...

  • Page 40: Adjustment

    http://www.xiaoyu163.com KEH-P490,P4900,P4950 3 7 63 1515 0 6. ADJUSTMENT - Connection Diagram BACK UP +14.4V DC Regulated Power Supply Lch + Ω Lch - mV Meter (1) Oscilloscope Rch + Ω Rch - Dummy Antenna Antenna Plug Ω (37.5 Ω Stereo FM SSG Modulator...
  • Page 41 http://www.xiaoyu163.com KEH-P490,P4900,P4950 3 7 63 1515 0 FM ADJUSTMENT (UC MODEL) 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 42: General Information

    http://www.xiaoyu163.com KEH-P490,P4900,P4950 3 7 63 1515 0 7. GENERAL INFORMATION 7.1 DISASSEMBLY Cassette Mechanism Module Remove the Case(not shown) 1. Remove the two screws. 2. Remove the Case. Remove the Cassette Mechanism Module (not shown) 1. Remove the four screws. 2.Disconnect the connector, and then remove the Cassette Mechanism Module.

  • Page 43: Parts

    http://www.xiaoyu163.com KEH-P490,P4900,P4950 3 7 63 1515 0 7.2 PARTS 7.2.1 IC CXA2559Q L 13942296513 PML003AM Rear- Loud- Front- IN1_R IN2_R IN3_R IN4+_R IN4-_R AGND out_R out_R out_R FIE_R DATA SVin_R Isolator circuit Anti radiation Fader Secondary Anti Alias filter volume volume filter Loudness...
  • Page 44 http://www.xiaoyu163.com KEH-P490,P4900,P4950 3 7 63 1515 0 - Pin Functions(PE5086A) Pin No. Pin Name Format Function and Operation ASENBO Slave power supply control output Not used ADPW A/D converter power AVSS swvdd Grille power supply control output FM stereo input AVREF1 D/A converter standard voltage KYDT...
  • Page 45 http://www.xiaoyu163.com KEH-P490,P4900,P4950 3 7 63 1515 0 Pin No. Pin Name Format Function and Operation Not used TESTIN Test program mode input AVDD A/D converter analog power supply (VDD) AVREF0 A/D converter standard voltage input Signal level input 77,78 MODEL2,1 Model select input 79,80 Not used...
  • Page 46 http://www.xiaoyu163.com KEH-P490,P4900,P4950 3 7 63 1515 0 - Pin Functions (PD6278C) Pin No. Pin Name Function and Operation SEG4-0 LCD segment output COM3-0 LCD common output LCD drive power supply 11-14 KS4-1 Key strobe output 15,16 KD1,2 Key data input (analogue input) Remote control reception System micro computer UART communication data input System reset...

  • Page 47: Display

    http://www.xiaoyu163.com KEH-P490,P4900,P4950 3 7 63 1515 0 7.2.2 DISPLAY - CAW1563 L 13942296513 u163 http://www.xiaoyu163.com...

  • Page 48: Operations And Specifications

    http://www.xiaoyu163.com KEH-P490,P4900,P4950 3 7 63 1515 0 8. OPERATIONS AND SPECIFICATIONS - Connection Diagram (KEH-P490/X1M/UC) L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 49 KEH-P490,P4900,P4950 3 7 63 1515 0 - Connection Diagram (KEH-P4900/X1M/UC) L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 50 http://www.xiaoyu163.com KEH-P490,P4900,P4950 3 7 63 1515 0 - Connection Diagram (KEH-P4950/X1M/ES) L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 51 http://www.xiaoyu163.com KEH-P490,P4900,P4950 3 7 63 1515 0 8.1 OPERATIONS (KEH-P490/X1M/UC) PAUSE/BSM button BAND button 5/∞/2/3 EJECT button EQ button buttons Cassette door Detach button Buttons 1–6 SOURCE/OFF button DISPLAY button CLOCK button AUDIO button RPT button +/– button L 13942296513 KEH-P490/X1M/UC ONLY +/–...
  • Page 52 http://www.xiaoyu163.com KEH-P490,P4900,P4950 3 7 63 1515 0 L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 53 http://www.xiaoyu163.com KEH-P490,P4900,P4950 3 7 63 1515 0 L 13942296513 u163 http://www.xiaoyu163.com...

  • Page 54: Specifications

    (1.0 µV/75 Ω, mono, S/N: 30 dB) Max. current consumption ........8.5 A 50 dB quieting sensitivity ..16 dBf (1.7 µV/75 Ω, mono) Dimensions (KEH-P490/X1M/UC, KEH-P4900/X1M/UC) (DIN) (chassis) ..178 (W) × 50 (H) × 155 (D) mm Signal-to-noise ratio ...... 70 dB (IHF-A network) [7 (W) ×...

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