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KEH-P4850J

2. EXPLODED VIEWS AND PARTS LIST

2.1 PACKING

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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 mot risk trying to do so
and refer the repair to a qualified service technician.

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Содержание KEH-P4850J

Страница 1: ...LAYER WITH FM AM SW TUNER KEH P4850J ES Service Manual CONTENTS 1 SAFETY INFORMATION 2 2 EXPLODED VIEWS AND PARTS LIST 2 3 SCHEMATIC DIAGRAM 8 4 PCB CONNECTION DIAGRAM 20 5 ELECTRICAL PARTS LIST 30 6 ADJUSTMENT 36 7 GENERAL INFORMATION 38 7 1 PARTS 38 7 1 1 IC 38 7 1 2 DISPLAY 42 7 2DISASSEMBLY 43 7 3BLOCK DIAGRAM 44 8 OPERATIONS AND SPECIFICATIONS 45 NOTE See the separate manual CX 631 CRT1640 fo...

Страница 2: ...chnicians 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 mot risk trying to do so and...

Страница 3: ...lish Spanish Portuguese B Arabic 1 2 Installation Manual CRD2790 English Spanish Portuguese B Arabic 2 Cord Assy CDE5798 3 Spring CBH 865 4 Screw Assy CEA2003 5 Screw CBA1284 6 Polyethylene Bag CEG 127 7 Screw CRZ50P090FMC 8 Screw TRZ50P080FMC 9 Polyethylene Bag CEG 158 10 Handle CNC5395 11 Bush CNV1009 12 Polyethylene Bag CEG 162 13 Carton CHG3801 14 Contain Box CHL3801 15 Protector CHP2101 16 Pr...

Страница 4: ...4 KEH P4850J 2 2 EXTERIOR ...

Страница 5: ...crew BPZ20P100FZK 35 Button Detach CAC5789 36 Button 1 6 CAC5794 37 Button CAC5930 38 Button EQ CAC6135 39 Button CAC5783 40 Button Eject CAC5793 41 Button Display CAC5788 42 Button Cross CAC5786 43 Button A B CAC5787 44 Spring CBH2103 45 Cover CNS5130 46 Housing CNV5528 47 Keyboard Unit CWM6264 48 LCD LCD1901 CAW1543 49 Connector CN1901 CKS3580 50 Holder CNC7981 51 Sheet CNM5941 52 Lighting Condu...

Страница 6: ...6 KEH P4850J 2 3 CASSETTE MECHANISM MODULE ...

Страница 7: ...1417 27 Lever ENC1448 28 Arm ENC1488 29 Motor EXM1031 30 Belt ENT1027 31 Gear ENV1347 32 Collar ENV1508 33 Gear ENV1350 34 Flywheel ENV1500 35 Worm Gear ENV1439 36 Worm Wheel ENV1440 37 Gear ENR1028 38 Lever ENV1442 39 40 Gathering PCB ENX1037 41 Gathering PCB ENX1042 42 Switch S1 ESG1004 43 Motor Unit M2 EXA1485 44 Chassis Unit EXA1511 45 Pinch Holder ENV1485 46 Pinch Holder ENV1486 47 Reel Unit ...

Страница 8: ... A a A b A b A a Large size SCH diagram Guide page Detailed page 4R7 16 7 2MHz B D C TUNER UNIT DECK UNIT KEYBOARD UNI TAPE 9dBs FM 15 5dBs AM 22dBs For resistors and capacitors in the circuit diagrams their resistance values or capacitance values are expressed in codes Ex Resistors Code Practical value 123 12k ohms 103 10k ohms Capacitors Code Practical value 103 10kpF 0 01uF 101 10 100uF 10V CN1...

Страница 9: ...94MHz PE5053A A TUNER AMP UNIT NIT CD 2 2dBs FM 9 6dBs AM 3 1dBs TAPE 4dBs CD 10 3dBs FM 35 6dBs AM 29 1dBs TAPE 22 0dBs CD 36 3dBs SYSTEM CONTROLLER IP BUS DRIVER ELECTRONIC VOLUME POWER AMP RESET 8V REGULATER IP BUS CEK1136 TAPE 4 2dBs 1901 332 16 A A b ...

Страница 10: ...10 KEH P4850J A 1 2 3 4 B C D 1 2 3 4 4R7 16 7 2MHz B TUNER UNIT FM 15 5dBs AM 22dBs IP BUS DR ELE PM2006A A a A a A b ...

Страница 11: ...dBs SYSTEM CON For resistors and capacitors in the circuit diagrams their resistance values or capacitance values are expressed in codes Ex Resistors Code Practical value 123 12k ohms 103 10k ohms Capacitors Code Practical value 103 10kpF 0 01uF 101 10 100uF 10V CN1901 A a A a A b ...

Страница 12: ... 1 2 3 4 3300 16 600µH 4 194MHz A TUNER AMP UNIT FM 9 6dBs AM 3 1dBs TAPE 4dBs CD 10 3dBs FM 35 6dBs AM 29 1dBs TAPE 22 0dBs CD 36 3dBs US DRIVER ELECTRONIC VOLUME POWER AMP RESET 8V REGULATER CEK1136 TAPE 4 2dBs 332 16 A a A b A b ...

Страница 13: ...13 KEH P4850J 5 6 7 8 A B C D 5 6 7 8 PE5053A CD 2 2dBs M CONTROLLER 8V REGULATER IP BUS A b A a A b ...

Страница 14: ...14 KEH P4850J A 1 2 3 4 B C D 1 2 3 4 3 2 TUNER UNIT B PA4023B B A ...

Страница 15: ...15 KEH P4850J 5 6 7 8 A B C D 5 6 7 8 B ...

Страница 16: ...16 KEH P4850J A 1 2 3 4 B C D 1 2 3 4 CAW1543 3 3 KEYBOARD UNIT C ...

Страница 17: ...17 KEH P4850J 5 6 7 8 A B C D 5 6 7 8 C KEYBOARD UNIT 43 IL1901 1905 CEL1605 40mA 14V EDIT CLOCK PTY PAUSE BSM C CN601 A ...

Страница 18: ... 22 16 R283 0R0 R284 0R0 R282 0R0 C253 330P C254 330P C252 330P C251 330P R281 0R0 R255 220 C256 R01 R258 1K R301 18K R273 1K R274 1K R271 1K R272 1K R290 0R0 C403 R068 R403 82K C402 4700P C401 R33 R402 16K R401 4R7K R323 0R0 R257 1K C255 R01 C272 R1 C313 100P R386 0R0 R285 0R0 HD1 HEAD ASSY EXA1506 TEST TAPE NCT 150 400Hz 200nWb m RL RR FR FL Signal GND C302 R1 C302 R1 C301 R1 R304 R302 16K 16K R...

Страница 19: ...osition 0R0 R068 3 82K R402 16K R401 4R7K R351 1K R352 1K R353 1K R354 1K R373 0R0 R355 270K C352 3900P R362 180 C351 R22 C353 R01 C354 R01 R374 0R0 C356 R01 C355 R1 D352 1SS355 M1 MOTOR UNIT MAIN MOTOR EXA1490 S1 LOAD ESG1004 S2 ESG1004 70µs MODE SENSE EGN1 EGN1005 EGN2 EGN1006 FWD END SENSE EGN3 EGN1006 REV END SENSE M2 MOTOR UNIT SUB MOTOR EXA1485 Power GND E F ...

Страница 20: ...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 to check with the schematic diagram 2 Viewpoint of PCB diagrams Capacitor Connector P C Board Chip Part SIDE A SIDE B A ...

Страница 21: ...21 KEH P4850J 5 6 7 8 A B C D 5 6 7 8 A SIDE A B CN251 D IP BUS ...

Страница 22: ...22 KEH P4850J A 1 2 3 4 B C D 1 2 3 4 A A TUNER AMP UNIT ...

Страница 23: ...23 KEH P4850J 5 6 7 8 A B C D 5 6 7 8 A SIDE B ...

Страница 24: ...A B 24 KEH P4850J A 1 2 3 4 B C D 1 2 3 4 4 2 TUNER UNIT B SIDE A B TUNER UNIT L5 T231 L2 L52 ...

Страница 25: ...25 KEH P4850J 1 2 3 4 A B C D 1 2 3 4 B SIDE B B TUNER UNIT ...

Страница 26: ...KEH P4850J A 1 2 3 4 B C D 1 2 3 4 LCD1901 4 3 KEYBOARD UNIT C C KEYBOARD UNIT 26 SIDE A ...

Страница 27: ...27 KEH P4850J 1 2 3 4 A B C D 1 2 3 4 C C KEYBOARD UNIT CN601 A SIDE B ...

Страница 28: ...28 KEH P4850J A 1 2 3 4 B C D 1 2 3 4 4 4 CASSETTE MECHANISM MODULE D D A HEAD ASSY M2 M1 DECK UNIT CN602 D DECK UNIT SIDE A SIDE B E ...

Страница 29: ...29 KEH P4850J 1 2 3 4 A B C D 1 2 3 4 Fig 20 F E E PCB UNIT REEL PCB SIDE A SIDE B E F LOAD SW S1 70µ SW S2 MODE SENSE EGN1 1 4 7 1 2 3 4 5 6 E PCB UNIT D CN253 F ...

Страница 30: ... 204 RS1 16S103J Unit Number CWE1430 Unit Name Tuner Unit MISCELLANEOUS IC 1 IC PA4023B IC 2 IC PA4024A Q 1 Transistor 2SC2712 Q 2 Transistor DTC124EU Q 3 FET 3SK263 Q 31 Transistor 2SC2712 Q 201 Transistor FC12 Q 203 Transistor DTC124EU Q 204 Transistor DTC124EU Q 205 Transistor DTC124EU Q 206 Transistor 2SC4116 Q 231 Transistor 2SC4116 D 1 Diode RD39JS D 2 Diode RD39JS D 3 Diode 1SV251 D 4 Diode...

Страница 31: ...55 CKSQYB223K25 C 56 CKSQYB104K16 C 57 CKSRYB472K50 C 58 CEJA330M10 C 59 CKSRYB103K25 C 60 CKSRYB102K50 C 61 CCSRCH270J50 C 62 CKSRYB103K25 C 63 CEJAR22M50 C 65 CKSQYB104K16 C 101 CEJANP100M10 C 102 CKSRYB182K50 C 103 CKSQYB682K50 C 104 CEJA2R2M50 C 105 CKSRYB103K25 C 106 CCSRCH151J50 C 107 CKSRYB103K25 C 151 CKSRYB472K50 C 152 CKSQYB104K16 C 153 CEJA3R3M50 C 154 CKSQYB104K16 C 157 CEJA3R3M50 C 15...

Страница 32: ...01 Ferri Inductor LAU2R2K L 502 Ferri Inductor LAU2R2K L 601 Ferri Inductor LAU2R2K L 602 Ferri Inductor LAU2R2K L 603 Ferri Inductor LAU2R2K L 702 Ferri Inductor LAU2R2K L 901 Choke Coil 600µH CTH1171 X 501 Crystal Resonator 7 200MHz CSS1379 X 601 Ceramic Resonator 4 194MHz CSS1047 Tuner Unit CWE1430 RESISTORS R 310 RS1 10S103J R 317 RS1 10S152J R 318 RS1 10S103J R 319 RS1 10S221J R 320 RS1 10S10...

Страница 33: ...0S102J R 923 RS1 10S103J R 924 RS1 10S223J R 944 RS1 10S152J R 949 RS1 8S1R0J R 955 RD1 4PU473J CAPACITORS C 303 CEJA470M10 C 304 CEJA100M16 C 308 CKSQYB104K50 C 309 CKSQYB224K16 C 310 CKSQYB224K16 C 311 CKSQYB224K16 C 312 CKSQYB224K16 C 313 CEJA4R7M35 C 314 CEJA4R7M35 C 315 CEJA330M10 C 316 CEJA1R0M50 C 317 CEJA100M16 C 318 CKSYB105K16 C 319 CKSQYB224K16 C 320 CKSQYB224K16 C 321 CKSQYB224K16 C 32...

Страница 34: ...605 IL 1905 Lamp 40mA 14V CEL1605 LCD1901 LCD CAW1543 RESISTORS R 1901 RS1 10S222J R 1902 RS1 10S222J R 1903 RS1 10S472J R 1908 RS1 10S473J R 1909 RS1 10S473J R 1910 RS1 10S473J R 1911 RS1 10S473J R 1912 RS1 10S473J R 1913 RS1 10S473J R 1922 RS1 10S473J CAPACITORS C 1901 CEAL100M16 C 1902 CKSQYB104K16 Unit Number EWM1021 Unit Name Deck Unit MISCELLANEOUS IC 251 IC CXA2559Q IC 351 IC PA2020A D 352 ...

Страница 35: ...er Unit Name PCB Unit S 1 Switch Load ESG1004 EGN 1 Photo Interrupter EGN1005 Unit Number Unit Name Reel PCB EGN 2 Photo Interrupter EGN1006 EGN 3 Photo Interrupter EGN1006 Miscellaneous Parts List M 1 Motor Unit Main EXA1490 M 2 Motor Unit Sub EXA1485 HD 1 Head Assy EXA1506 Circuit Symbol and No Part Name Part No E F ...

Страница 36: ... Antenna Plug Dummy Antenna 50 Ω 75Ω AM SSG 80 Z Ω Antenna Plug Dummy Antenna TUNER UNIT TOP VIEW T31 T231 C63 L52 Center Meter TUNER UNIT BOTTOM VIEW Pin1 Pin13 Pin14 Pin 19 Pin26 L2 L4 L5 L52 VR154 DC V Meter 2 Pin 20 DC V Meter 1 C1 15pF 6 ADJUSTMENT Connection Diagram NOTE select C1 so that total capacity of 80pF is attained from the direction of the receiver jack Z Output impedance of SSG ...

Страница 37: ...ther adjustments after switching power ON let the tuner run for ten minutes to allow the circuits to stabilize FM ADJUSTMENT FM SSG Displayed Adjustment Adjustment Method No Frequency MHz Level dBf Frequency MHz Point Switch Position TUN Volt 1 108 0 108 0 L5 DC V Meter 2 6V IF 2 98 1 M 65 98 1 L52 Center Meter 0 ANT Coil 3 89 9 M 5 89 9 L2 mV Meter 1 Maximum RF Coil 4 89 9 M 5 89 9 L4 mV Meter 1 ...

Страница 38: ...38 KEH P4850J 7 GENERAL INFORMATION 7 1 PARTS 7 1 1 IC CXA2559Q ...

Страница 39: ...ol output 27 DRSENS I Door open close sense input 28 DRSYS O C Door system select output 29 FM O C FM power control output 30 AM O C AM power control output 31 CM O C Cassette mechanism capstan motor control output 32 NC Not used 33 VSS GND 34 SC2 O C Cassette mechanism sub motor control output 35 SC1 O C Cassette mechanism sub motor control output 36 MSIN I Cassette mechanism MS sense input 37 RI...

Страница 40: ...nction and Operation 67 CLKIN I Clock input 68 VDD VDD 69 X2 Oscillator output 70 X1 Oscillator input 71 IC Connect to GND 72 XT2 Sub Clock terminal 73 TESTIN I Test program mode input 74 AVDD A D converter analog power supply VDD 75 AVREF0 I A D converter standard voltage input 76 SL I Signal level input 77 80 NC Not used 80 1 20 21 40 41 60 61 PE5053A Format Meaning C C MOS N N Channel open drai...

Страница 41: ... KS6 5 O Key strobe output 29 55 SEG39 13 O LCD segment output 56 VCC Power supply 57 64 SEG12 5 O LCD segment output 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Vref IN1_L IN2_L IN3_L IN4 _L AGND Loud out_L SVin_L Front out_L Rear out_L FIE_L DGND IN4 _L CLK VCC IN1_R IN2_R IN3_R IN4 _R AGND Loud out_R SVin_R Front out_R Rear out_R FIE_R STB IN4 _R DATA Isolator cir...

Страница 42: ...42 KEH P4850J 7 1 2 DISPLAY CAW1543 COMMON SEGMENT ...

Страница 43: ...traight Remove the tuner amp unit Removing the Case not shown 1 Remove the two screws 2 Remove the case Removing the Cassette Mechanism Module not shown 1 Remove the four screws 2 Disconnect the connector and then remove the cassette mechanism module Removing the Panel Unit Fig 1 Disengage the stopper at two locations indicated and remove the panel unit Fig 1 Fig 2 Panel Unit Tuner Amp Unit ...

Страница 44: ...44 KEH P4850J 7 3 BLOCK DIAGRAM B A D F E C ...

Страница 45: ...lay control terminal Max 300 mA 12 V DC 16 Power amp sold separately 20 Rear 20 Rear 30 Use this for connections when you have the sepa rately available amplifier 6 To vehicle metal body 20 Rear 20 Rear 17 Left speaker 18 Right speaker 19 Front 19 Front 5 Black 7 Red 9 Yellow 21 White 22 White black 23 Gray 24 Gray black 25 Green 26 Green black 27 Violet 28 Violet black 29 With a 2 speaker system ...

Страница 46: ...this product 1 Select the desired source e g tuner Each press of the SOURCE OFF button selects the desired source in the following order CD player one disc only Tuner Tape Multi CD player AUX Note In the following cases the sound source will not change When a product is not connected to this product When no tape is set in this product When no magazine is set in the Multi CD player When no disc is ...

Страница 47: ...s and 6 SW stations can be stored in memory You can also use the 5 or buttons to recall broadcast stations memorized in buttons 1 through 6 Preset Number Indicator Band F I FM1 F II FM2 AM SW Band Indicator Frequency Indicator Reset the AM tuning step from 9 kHz the factory preset step to 10 kHz when using the tuner in North Central or South America Basic Operation of Cassette Player Direction Cha...

Страница 48: ...o a 50 Disc type Multi CD Player information on all the discs in the magazine is read If you start playing a disc on a 50 Disc type Multi CD Player before reading of information on all discs has been completed reading of information stops part way through If the multi CD player cannot operate properly an error message such as ERROR 14 is displayed Refer to the multi CD player owner s manual If the...

Страница 49: ...z 11 dB 10 kHz volume 30 dB Cassette player Tape Compact cassette tape C 30 C 90 Tape speed 4 76 cm sec 0 14cm sec 0 05cm sec Fast forward rewinding time Approx 100 sec for C 60 Wow flutter 0 09 WRMS Frequency response Metal 30 16 000 Hz 3 dB Stereo separation 45 dB Signal to noise ratio 61 dB IEC A network FM tuner Frequency range 87 5 108 MHz Usable sensitivity 11 dBf 1 0 µV 75 Ω mono S N 30 dB ...

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