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53

KEH-P4800,P4850

General

Power source  .......... 14.4 V DC (10.8 – 15.1 V allowable)
Grounding system  ........................................ Negative type
Max. current consumption  ........................................ 8.5 A
Dimensions

(DIN) (chassis) ...... 178 (W) 

×

50 (H) 

×

155 (D) mm

(nose) ............ 188 (W) 

×

58 (H) 

×

19 (D) mm

(D)

(chassis) ...... 178 (W) 

×

50 (H) 

×

160 (D) mm

(nose) ............ 170 (W) 

×

48 (H) 

×

14 (D) mm

Weight ...................................................................... 1.2 kg

Amplifier

Continuous power output is 17 W per channel min. into 4
ohms, both channels driven 50 to 15,000 Hz with no more
than 5% THD.
Maximum power output  ...................................... 40 W 

×

4

Load impedance  .......................... 4 

Ω

(4 – 8 

Ω

allowable)

Preout maximum output

level/output impedance  ...................... 2.2 Vp-p/1 k

Ω

Equalizer (3 band equalizer)

(Low) .............................................................. ±12 dB
(Mid) .............................................................. ±12 dB
(High) .............................................................. ±12 dB

Loudness contour

(Low) .................. +3.5 dB (100 Hz), +3 dB (10 kHz)
(Mid).................. +10 dB (100 Hz), +6.5 dB (10 kHz)
(High).................. +11 dB (100 Hz), +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(UCmodel) ..................87.5 – 107.9 MHz 

(ESmodel) ........................................ 87.5 – 108 MHz

Usable sensitivity  .................................................... 11 dBf

(1.0 

µ

V/75 

Ω

, mono, S/N: 30 dB)

50 dB quieting sensitivity  .... 16 dBf (1.7 

µ

V/75 

Ω

, mono)

Signal-to-noise ratio  ...................... 70 dB (IEC-A network)
Distortion  .......................... 0.3% (at 65 dBf, 1 kHz, stereo)
Frequency response ...................... 30 – 15,000 Hz (±3 dB)
Stereo separation .......................... 40 dB (at 65 dBf, 1 kHz)
Selectivity(UCmodel) ......................................70dB(2ACA)
Three-signal intermodulation(UCmodel)

(desired signal level) ..........................................50dBf

(two undesire signal level : 100 dBf)

AM tuner

Frequency range  ........................ 531 – 1,602 kHz (9 kHz)

(ESmodel)

530 – 1,710 kHz (10 kHz)

Usable sensitivity  .............................. 18 

µ

V (S/N: 20 dB)

Selectivity (ESmodel) ................................ 50 dB (±9 kHz)

50 dB (±10 kHz)

Note:

• Specifications and the design are subject to

possible modification without notice due to
improvements.

8.2. SPECIFICATIONS

Содержание KEH-P4800

Страница 1: ... FM AM TUNER KEH P4800 X1M UC Service Manual CONTENTS 1 SAFETY INFORMATION 2 2 EXPLODED VIEWS AND PARTS LIST 2 3 SCHEMATIC DIAGRAM 8 4 PCB CONNECTION DIAGRAM 22 5 ELECTRICAL PARTS LIST 32 6 ADJUSTMENT 39 7 GENERAL INFORMATION 41 7 1 PARTS 41 7 1 1 IC 41 7 1 2 DISPLAY 45 7 2DISASSEMBLY 46 7 3BLOCK DIAGRAM 47 8 OPERATIONS AND SPECIFICATIONS 48 NOTE See the separate manual CX 631 CRT1640 for the cass...

Страница 2: ...4 KEH P4800 P4850 2 2 EXTERIOR ...

Страница 3: ...rast table 2 33 Screw BPZ20P060FMC 34 Screw 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 See Contrast table 2 48 LCD LCD1901 CAW1543 49 Connector CN1901 CKS3580 ...

Страница 4: ...50 X1M ES have the same construction except for the following Part No Mark No Description KEH P4800 X1M UC KEH P4850 X1M ES 12 Tuner Amp Unit CWM6248 CWM6249 16 FM AM Tuner Unit CWE1467 CWE1486 32 Detach Grille Assy CXB3322 CXB3323 47 Keyboard Unit CWM6259 CWM6260 54 Grille Unit CXB4065 CXB4066 ...

Страница 5: ...NC1417 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 Uni...

Страница 6: ...A a Large size SCH diagram Guide page Detailed page 4R7 16 UC model ES model 331 UC model 510 ES model FM AM TUNER UNIT 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 B ...

Страница 7: ... ES PD4973A TUNER AMP UNIT 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 A IP BUS CEK1136 TAPE 4 2dBs CN1901 T 332 16 A A b ...

Страница 8: ...10 KEH P4800 P4850 A 1 2 3 4 B C D 1 2 3 4 4R7 16 UC model ES model 331 UC model 510 ES model 102 U 103 E FM AM TUNER UNIT FM 15 5dBs AM 22dBs B A a A a A b ...

Страница 9: ...d 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 D CN1901 KEYBOARD UNIT C DECK UNIT A a A a A b ...

Страница 10: ... 2 3 4 B C D 1 2 3 4 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 IP BUS DRIVER ELECTRONIC VOLUME POWER AMP RESET 8V REGULATER A CEK1136 TAPE 4 2dBs 332 16 A a A b A b ...

Страница 11: ...13 KEH P4800 P4850 5 6 7 8 A B C D 5 6 7 8 PD4973A CD 2 2dBs CONTROLLER 8V REGULATER IP BUS A b A a A b ...

Страница 12: ...14 KEH P4800 P4850 A 1 2 3 4 B C D 1 2 3 4 3 2 FM AM TUNER UNIT KEH P48000 X1M UC B 3 1 2 FM AM TUNER U D1 D2 RD39JS RD39JS R1 R2 2R2M 2R2M D6 MA157 B ...

Страница 13: ...15 KEH P4800 P4850 5 6 7 8 A B C D 5 6 7 8 B ER UNIT IFC A ...

Страница 14: ...3 1 2 FM AM TUNER U D1 D2 RD39JS RD39JS R1 R2 2R2M 2R2M D6 MA157 16 KEH P4800 P4850 A 1 2 3 4 B C D 1 2 3 4 KEH P4850 X1M ES B B ...

Страница 15: ...ER UNIT IFC 17 KEH P4800 P4850 5 6 7 8 A B C D 5 6 7 8 B A ...

Страница 16: ...18 KEH P4800 P4850 A 1 2 3 4 B C D 1 2 3 4 CAW1543 3 3 KEYBOARD UNIT C ...

Страница 17: ...19 KEH P4800 P4850 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: ...73 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...

Страница 19: ...h position 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: ...31 KEH P4800 P4850 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 21: ... 10S393J R 417 RS1 10S0R0J R 418 RS1 10S0R0J R 419 RS1 10S0R0J R 502 RS1 10S102J R 503 RS1 10S222J R 506 RS1 10S182J Unit Number CWM6248 KEH P4800 X1M UC CWM6249 KEH P4850 X1M ES Unit Name Tuner Amp Unit MISCELLANEOUS D 607 Diode 1SS270 D 608 Diode 1SS270 D 901 Diode HZS7L C2 D 902 Diode 1SR139 400 D 903 Diode 1SR139 400 D 904 Diode HZS7L A1 D 905 Diode 1SR139 400 D 906 Diode HZS6L B2 D 907 Diode ...

Страница 22: ...model RS1 10S102J R 649 ES model RS1 10S103J R 651 RD1 4PU222J R 653 RS1 8S0R0J R 654 RS1 10S0R0J R 655 RS1 10S473J R 716 RS1 10S620J R 717 RS1 10S101J R 718 RS1 10S101J R 719 RS1 10S473J R 720 RS1 10S473J R 721 RS1 10S102J R 722 RS1 10S102J R 723 RS1 10S102J R 724 RS1 10S223J R 725 RD1 4PU472J R 726 RS1 10S222J R 901 RS1 10S473J R 902 RS1 10S223J R 903 RS1 10S223J R 904 RS1 10S473J R 905 RD1 4PU1...

Страница 23: ...S 1901 Switch CSG1041 S 1902 Switch CSG1111 S 1903 Switch CSG1111 S 1904 Switch CSG1111 S 1905 Switch CSG1111 S 1906 Switch CSG1111 S 1907 Switch CSG1111 S 1908 Switch CSG1111 S 1909 Switch CSG1111 S 1910 Switch CSG1111 S 1911 Switch CSG1111 S 1912 Switch CSG1111 S 1913 Switch CSG1111 S 1914 Switch CSG1041 S 1915 Switch CSG1041 S 1916 Switch CSG1111 S 1917 Switch CSG1111 S 1918 Switch CSG1041 S 19...

Страница 24: ...1 16S203J R 160 RS1 16S222J R 161 RS1 16S563J R 162 RS1 16S105J R 163 RS1 16S223J R 202 RS1 16S223J R 203 RS1 16S225J R 204 RS1 16S103J R 206 RS1 16S220J R 207 RS1 16S101J R 208 RS1 16S102J R 209 RS1 16S471J R 214 RS1 16S822J R 215 RS1 16S822J R 217 RS1 16S102J R 231 RS1 16S272J R 232 RS1 16S473J R 237 RS1 16S103J R 238 RS1 16S104J R 239 RS1 16S104J R 240 RS1 16S332J R 241 RS1 16S202J R 243 RS1 16...

Страница 25: ...6 Diode MA157 D 7 Diode KV1410 F1 D 8 Diode KV1410 F1 D 201 Diode MA157 D 202 Diode MA157 D 231 Diode SVC253 L 2 Coil CTC1133 L 3 Inductor LCTB2R2K2125 L 4 Coil CTC1133 L 5 Coil CTC1132 L 6 Inductor LCTBR15K1608 L 51 Ferri Inductor LAU150K L 201 Ferri Inductor LAU4R7K L 202 Ferri Inductor LAU330K L 203 Inductor CTF1287 L 208 Inductor LAU121K L 231 Inductor LCTA3R3J3225 T 31 Coil CTE1117 T 51 Coil ...

Страница 26: ...CKSRYB103K25 C 63 CEJAR22M50 C 101 CEJANP100M10 C 102 CKSRYB182K50 C 103 CKSRYB682K25 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 158 CKSYB474K16 C 159 CEJA220M6R3 C 160 CKSQYB104K16 C 161 CKSQYB104K16 C 162 CEJA3R3M50 C 163 CKSRYB102K50 C 170 CCSRCH100D50 C 201 CCSRCH471J50 C...

Страница 27: ...KSRYB331K50 C 252 CKSRYB331K50 C 253 CKSRYB331K50 C 254 CKSRYB331K50 C 255 CKSRYB103K25 C 256 CKSRYB103K25 C 272 CKSQYB104K16 C 273 CEJA220M16 C 301 CKSYB104K50 C 302 CKSYB104K50 C 313 CCSQCH101K50 C 351 CKSYB224K25 C 352 CKSQYB392K50 C 353 CKSQYB103K50 C 354 CKSQYB103K50 C 355 CKSYB104K50 C 356 CKSQYB103K50 C 401 CKSQYB334K16 C 402 CKSQYB472K50 C 403 CKSQYB683K16 Unit Number Unit Name PCB Unit S ...

Страница 28: ...ulated Power Supply TUNER AMP UNIT 50 Ω 75Ω FM SSG Stereo Modulator 50Ω 37 5Ω AntennaPlug DummyAntenna DECK UNIT VR401 DC V Meter 2 SIDE B FM AM TUNER UNIT TOP VIEW T31 T51 C63 T51 Center Meter FM AM TUNER UNIT BOTTOM VIEW Pin1 Pin13 Pin14 Pin 19 Pin26 L2 L4 L5 VR154 TC1 DC V Meter 1 Q402 EMITTER 6 ADJUSTMENT Connection Diagram ...

Страница 29: ... 98 1 T51 Center Meter 0 ANT Coil 3 98 1 M 5 98 1 L2 mV Meter 1 Maximum RF Coil 4 98 1 M 5 98 1 L4 mV Meter 1 Maximum IFT 5 98 1 M 5 98 1 T31 mV Meter 1 Maximum STEREO MODE ARC 6 98 1 S 40 98 1 VR154 mV Meter 1 Separation 5dB STEREO MODE FM ADJUSTMENT ES MODEL FM SSG Displayed Adjustment Adjustment Method No Frequency MHz Level dBf Frequency MHz Point Switch Position TUN Volt 1 108 0 L5 DC V Meter...

Страница 30: ...41 KEH P4800 P4850 7 GENERAL INFORMATION 7 1 PARTS 7 1 1 IC CXA2559Q ...

Страница 31: ...RSENS 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 RIMUTE O N RI ou...

Страница 32: ...Pin No Pin Name I O Format Function and Operation 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 MODEL0 I Model select input 78 MODEL1 I Model select input 79 80 NC Not used 80 1 20...

Страница 33: ...28 KS6 5 O Key strobe output 29 55 SEG39 13 O LLCD 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 ...

Страница 34: ...45 KEH P4800 P4850 7 1 2 DISPLAY CAW1543 COMMON SEGMENT ...

Страница 35: ...47 KEH P4800 P4850 7 3 BLOCK DIAGRAM B A D F E C ...

Страница 36: ...Auto antenna relay 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 ...

Страница 37: ...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 UCmodel 87 5 107 9 MHz ESmodel 87 5 108 MHz Usable sensitivity 11 dBf 1 0 µV 75 Ω mono S N 30 dB 50 dB quieting sensitivity 16 dBf 1 7 µV 75 Ω mono Sign...

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