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KEH-P7850

Basic Operation of Cassette Player

Note:

•

Be sure to close the front panel after loading or ejecting a cassette.

Direction Indicator

Fast Forward/Rewind and Music Search

•

Each pr

ess of the

button selects Fast forward or Forward-Music

Sear

ch.

FF (Fast forward)

F-MS (Forward-Music Search)

Normal Playback

•

Each pr

ess of the

button selects Rewind or Rewind-Music Sear

ch.

REW (Rewind)

R-MS (Rewind-Music Search)

Normal Playback

Note:

•

Fast forward/Rewind and Music Search can be canceled by pressing the BAND

button.

Note:

•

“MET

AL” appears on the display for 4 seconds when a metal or chrome tape is inserted.

Nothing is displayed for a normal tape.

Cassette Loading Slot

Elapsed Play T

ime Indicator

Note:

•

The continuous playback time count starts at 00’00” at

the following times.

When a tape is inserted.

When the tape direction is changed.

When you rewind the tape side currently playing

back to the beginning.

•

The continuous playback time count is halted when

fast-forwarding/rewinding and while the Music Search

function is operating.

Eject

Note:

•

he T

ape function can be turned

ON/OFF with the cassette tape

remaining in this product. (Refer to

page 6.)

Direction Change

Open

Note:

•

Use to open the front panel when

loading or ejecting a cassette.

(The illustration on the right

shows the front panel open.)

Содержание KEH-P7850

Страница 1: ...ce Manual NOTE See the separate manual CX 631 CRT1640 for the cassette mechanism description The cassette mechanism assy employed in this model is one of 2L series Dolby noise reduction manufactured under license from Dolby Laboratories Licensing Corporation Dolby and the double D symbol are trademarks of Dolby Laboratories Licensing Corporation CONTENTS 1 SAFETY INFORMATION 2 2 EXPLODED VIEWS AND...

Страница 2: ...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 a...

Страница 3: ...02 18 Remote Control Assy CXB3456 19 Case CXB3520 20 1 Owner s Manual CRD2762 20 2 Owner s Manual CRD2763 20 3 Installation Manual CRD2764 Mark No Description Part No 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 Owner s Manual ...

Страница 4: ...4 KEH P7850 2 2 EXTERIOR ...

Страница 5: ...CNC8350 44 Case CNC8351 45 Insulator CNM6099 46 Insulator CNM6190 47 Insulator CNM6257 48 Heat Sink CNR1505 49 Insulator CNV5792 50 FM AM Tuner Unit CWE1486 51 Holder CNC6554 52 Chassis Unit CXB3048 53 Screw ISS26P055FUC 54 Detach Grille Assy CXB3439 55 Screw BPZ20P060FMC 56 Screw BPZ20P080FZK 57 Button OPEN CAC5804 58 Button EJECT CAC5805 59 Button SOURCE CAC5806 60 Button BAND CAC5807 61 Button ...

Страница 6: ...CXB3049 95 Holder Unit CXB3050 96 Holder Unit CXB3051 97 Damper Unit CXB3180 98 Screw IMS20P040FZK 99 Remote Control Unit CXB3456 100 Cover CNS4948 101 102 Cassette Mechanism Module EXK3990 103 Coil L801 CTH1227 104 IC IC301 PAL005A 105 Transistor Q951 2SD2396 Mark No Description Part No ...

Страница 7: ...7 KEH P7850 ...

Страница 8: ...8 KEH P7850 2 3 CASSETTE MECHANISM MODULE ...

Страница 9: ...Belt ENT1027 31 Gear ENV1347 32 Collar ENV1508 33 Gear ENV1350 34 Flywheel ENV1500 35 Worm Gear ENV1439 36 Worm Wheel ENV1440 37 Gear ENR1037 38 Lever ENV1442 39 Arm ENV1525 40 Gathering PCB ENX1037 41 Gathering PCB ENX1042 42 Switch S1 S2 ESG1004 43 Motor Unit M2 EXA1485 44 Chassis Unit EXA1567 45 Pinch Holder ENV1485 46 Pinch Holder ENV1486 47 Reel Unit EXA1543 48 Head Base Unit EXA1457 49 Lever...

Страница 10: ...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 a A b A b A a A a A b A b A b A b A a A a Large size SCH diagram Guide page Detailed page A C A a B C D E F MODULE ANTENNA JACK ...

Страница 11: ...11 KEH P7850 5 6 7 8 A B C D 5 6 7 8 A b A A ...

Страница 12: ...12 KEH P7850 BANTENNA JACK A 1 2 3 4 B C D 1 2 3 4 A a A a A b ...

Страница 13: ...13 KEH P7850 C D E F MODULE 5 6 7 8 A B C D 5 6 7 8 A a A a A b C ...

Страница 14: ...14 KEH P7850 A A 1 2 3 4 B C D 1 2 3 4 A a A b A b ...

Страница 15: ...15 KEH P7850 5 6 7 8 A B C D 5 6 7 8 A b A a A b ...

Страница 16: ...16 KEH P7850 3 1 2 FM AM TUNER UN D1 D2 RD39JS RD39JS R1 R2 2R2M 2R2M D6 MA157 A 1 2 3 4 B C D 1 2 3 4 3 2 FM AM TUNER UNIT B B ...

Страница 17: ...17 KEH P7850 ER UNIT IFC 5 6 7 8 A B C D 5 6 7 8 B A ...

Страница 18: ... R281 0R0 R255 220 C256 R01 R258 1K VR302 CCP1280 33K B R301 18K C310 R1 R273 1K R274 1K R271 1K R272 1K R290 0R C403 R0 R403 82 C402 4700P C401 R33 R40 R40 4R7 R323 0R0 R257 1K C255 R01 C272 R1 VR301 33K B CCP1280 C309 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 R322 1K 6dBs 388mV 1dB D A Fwd Fwd Rev Rev A 1 ...

Страница 19: ... R33 R402 16K R401 4R7K R351 1K R352 1K R353 1K R354 1K R373 0R0 R375 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 F E 5 6 7 8 A B C D 5 6 7 8 D E F ...

Страница 20: ...d 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 2 Viewpoint of PCB diagrams 4 PCB CONNECTION DIAGRAM 4 1 TUNER AMP UNIT A A Capacitor Connector P C Board Chip Part SIDE A SIDE B TUNER AMP UNIT ...

Страница 21: ...21 KEH P7850 IP BUS IN PRE OUT ANTENNA CORD CN251 B D CN901 C S602 DOOR 5 6 7 8 A B C D 5 6 7 8 SIDE A A ...

Страница 22: ...22 KEH P7850 A 1 2 3 4 B C D 1 2 3 4 A A TUNER AMP UNIT ...

Страница 23: ...23 KEH P7850 5 6 7 8 A B C D 5 6 7 8 A SIDE B ...

Страница 24: ...24 KEH P7850 A 1 2 3 4 B C D 1 2 3 4 4 2 KEYBOARD UNIT C SIDE A KEYBOARD UNIT C ...

Страница 25: ...25 KEH P7850 EL901 CN601 EJECT A 1 2 3 4 A B C D 1 2 3 4 C SIDE B C KEYBOARD UNIT ...

Страница 26: ...26 KEH P7850 A 1 2 3 4 B C D 1 2 3 4 4 3 FM AM TUNER UNIT B B SIDE A FM AM TUNER UNIT A ...

Страница 27: ...27 KEH P7850 1 2 3 4 A B C D 1 2 3 4 B B SIDE B FM AM TUNER UNIT ...

Страница 28: ...28 KEH P7850 A 1 2 3 4 B C D 1 2 3 4 4 4 CASSETTE MECHANISM MODULE D D HEAD ASSY M2 M1 A E SIDE B SIDE A DECK UNIT D DECK UNIT CN602 ...

Страница 29: ...29 KEH P7850 1 2 3 4 A B C D 1 2 3 4 1 4 7 1 2 3 4 5 6 LOAD SW S1 70µ SW S2 MODE SENSE EGN1 E E F SIDE B SIDE A PCB UNIT PCB UNIT REEL PCB D E F CN253 F ...

Страница 30: ...R 241 RS1 16S202J R 243 RS1 16S183J R 244 RS1 16S392J R 247 RS1 16S123J Unit Number CWE1486 Unit Name FM AM Tuner Unit MISCELLANEOUS IC 1 IC PA4023B IC 2 IC PA4024A Q 1 Transistor 2SC2412K Q 2 Transistor DTC124EU Q 3 FET 3SK263 Q 31 Transistor 2SC2412K Q 201 FET 2SK932 Q 202 Transistor 2SC2412K Q 203 Transistor DTC124EU D 1 Diode RD39JS D 2 Diode RD39JS D 4 Diode 1SV250 D 5 Diode KV1410 F1 D 6 Dio...

Страница 31: ...211 CCSRCH101J50 C 212 CEJA470M6R3 C 213 CKSRYB103K25 C 216 CCSRCH101J50 C 217 CEJA1R5M50 C 219 CCSRCH471J50 C 220 CKSRYB103K25 C 230 CKSRYB103K25 C 231 CCSRCH330J50 C 232 CCSRCH150J50 C 233 CKSQYB104K16 C 234 CEJA330M10 C 235 CKSRYB332K50 C 236 CKSQYB473K16 C 237 CCSRCH120J50 C 239 CKSRYB472K50 C 240 CEJAR47M50 C 241 CKSQYB104K16 C 242 CEJAR47M50 C 243 CEJAR33M50 C 244 CKSQYB473K16 C 245 CKSRYB33...

Страница 32: ...er Unit CWE1486 BZ 601 Buzzer CPV1011 RESISTORS R 201 RS1 10S102J R 202 RS1 10S102J R 205 RS1 10S821J R 206 RS1 10S821J R 207 RS1 10S102J R 208 RS1 10S102J R 209 RS1 10S223J R 210 RS1 10S223J R 211 RS1 10S0R0J R 212 RS1 10S222J R 213 RS1 10S222J R 214 RS1 10S562J R 215 RS1 10S821J R 216 RS1 10S821J R 217 RS1 10S821J R 218 RS1 10S821J R 219 RS1 10S473J R 220 RS1 10S473J R 221 RS1 10S473J R 222 RS1 ...

Страница 33: ...1 10S204J R 822 RS1 8S225J R 823 RS1 8S225J R 825 RS1 8S474J R 826 RS1 8S474J R 827 RS1 8S105J R 829 RD1 2PM182J R 830 RD1 2PM182J R 831 RS1 10S152J R 832 RS1 10S103J R 834 RS1 10S103J R 836 RS1 8S391J R 837 RS1 8S391J R 951 RS1 10S473J R 952 RS1 10S102J R 953 RS1 10S102J R 954 RS1 10S101J R 955 RS1 10S103J R 956 RS1 10S473J R 957 RS1 10S102J R 958 RS1 10S473J R 959 RS1 10S102J R 961 RS1 10S1R0J R...

Страница 34: ... CEJA101M10 Unit Number CWM6061 Unit Name Keyboard Unit MISCELLANEOUS IC 901 IC PD6294A IC 902 RS 140 D 901 Diode DAN202U D 902 Diode DAP202U D 903 LED CL170UBX D 904 LED CL170PGCD L 901 Inductor LCTA101J3225 X 901 Ceramic Resonator 4 97MHz CSS1422 S 901 Switch CSG1107 S 902 Switch CSG1112 S 903 Switch CSG1111 S 904 Switch CSG1112 S 905 Switch CSG1112 S 906 Switch CSG1112 S 907 Switch CSG1112 S 90...

Страница 35: ...55 RS1 10S274J R 362 RS1 8S181J R 373 RS1 8S0R0J R 374 RS1 8S0R0J R 375 RS1 8S0R0J R 401 RS1 16S472J R 402 RS1 16S163J R 403 RS1 16S823J CAPACITORS C 251 CKSRYB331K50 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 309 CKSQYB104K16 C 310 CKSQYB104K16 C 313 CCSQCH101K50 C 351 CKS...

Страница 36: ...UNER AMP UNIT DECK UNIT DECK UNIT mV Meter 2 Pin3 Pin2 VR301 L VR302 R R L Antenna Jack 50Ω 75Ω FM SSG Stereo Modulator 50Ω 37 5Ω Antenna Plug Dummy Antenna 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 DC V Meter 1 6 ADJUSTMENT Connection Diagram ...

Страница 37: ...proceeding to further adjustments after switching power ON let the tuner run for ten minutes to allow the circuits to stabilize 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 1 6V IF 2 98 1 M 60 100 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...

Страница 38: ...r Treble Anti radiation filter Middle Bass Loudness volume FIE Fader volume Secondary volume Zero cross detect circuit Primary volume Anti Alias filter Middle Treble Bass Isolator circuit Anti radiation filter Loudness volume Zero cross detect circuit Fader volume Secondary volume FIE Digital block Auto Zero Auto Zero 1 2 3 4 5 6 7 Mute 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Mute Mute...

Страница 39: ...39 KEH P7850 PML005A CXA2560Q VCC VCCO PGND GATE NC VDC EL1 EL2 CLKR CLKC VDM ISET D ISET N VDCSEN VSB GND ...

Страница 40: ...6 PRSBSW I Not used 27 TELIN I TEL mute signal input 28 mute O Mute output 29 DIM O Dimmer select output 30 NC Not used 31 FM O FM power control output 32 AM O AM power control output 33 VCK O Clock output for electronic volume 34 VST O Strobe pulse output for electronic volume 35 VDT O Data output for electronic volume 36 tmute O Tuner mute output 37 NC Not used 38 SD I SD input 39 st I FM stereo...

Страница 41: ...se level input 79 81 NC Not used 82 AVDD Positive power supply terminal for analog circuit 83 AVREF1 A D converter reference voltage 84 AVSS A D GND 85 RX I IP BUS data input 86 TX O IP BUS data output 87 GND GND 88 ldet I PLL lock sense input 89 RCK I RDS demodulation clock input 90 RDS57K I 57kHz pulse count sense input 91 NC Not used 92 asens I ACC power sense input 93 bsens I Back up power sen...

Страница 42: ...stem reset 5 6 MODE1 0 GND 7 GRN amb O Green Amber select output 8 SO O UART output 9 SI I UART input 10 REMIN I Remote control reception 11 RVER Not used 12 NC Not used 13 16 KDT4 1 I Key data input 17 22 KST6 1 O Key strobe output 23 VCC 5V 24 73 SEG49 0 O LCD segment output 74 77 COM3 0 O Common driver output 78 80 V3 1 LCD bias power supply 20 21 40 41 60 61 80 1 PD6294A ...

Страница 43: ... 46 SEG 45 SEG 44 SEG 43 SEG 42 SEG 41 SEG 40 SEG 39 SEG 38 SEG 37 SEG 36 SEG 35 NC SEG 34 SEG 33 SEG 32 SEG 31 SEG 30 SEG 29 SEG 28 SEG 27 SEG 26 SEG 25 SEG 24 SEG 23 SEG 22 SEG 21 SEG 20 SEG 19 SEG 18 SEG 17 SEG 16 SEG 15 SEG 14 SEG 13 SEG 12 SEG 11 SEG 10 SEG 9 SEG 8 SEG 7 SEG 6 SEG 5 SEG 4 SEG 3 SEG 2 SEG 1 SEG 0 7 1 2 DISPLAY CAW1502 COMMON SEGMENT ...

Страница 44: ...uner 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 removing the Cassette Mechanism Module Removing the Panel Assy Fig 1 Remove the two screws Disconnect the two connectors Disengage the stopper at two locations indi cated and remove the Panel Assy Fig 1 Fig...

Страница 45: ... ELV motor select 7 Display TRAY motor select 0X 10 72 00 00 72 00 00 72 01 00 72 02 00 72 8ms pulse drive Display 24ms pulse drive DC drive 8 00 10 72 01 10 72 02 10 72 48ms pulse drive Display 100ms pulse drive DC drive ELV select ELV dowm Disc 1 6 TRAY select TRAY out 9 ELV select ELV up Disc 6 1 TRAY select TRAY in 00 00 00 01 01 01 02 02 02 Display CD multi player selected Focus mode select A...

Страница 46: ...F etc are performed normally 3 Error Cause Error Number Code Error Code Classification Mode Description Cause Detail 40 ELECTRIC PLAY FOK L Put out of focus 100ms Scratch 41 ELECTRIC PLAY LOCK L Spindle unlock Stain 100ms Vibration 42 ELECTRIC PLAY Subcode Failed to read subcode Servo defect unacceptable 500ms etc 43 ELECTRIC PLAY Sound skipped Last address memory operated 4 Indicating an Operatio...

Страница 47: ...ailed to lock or subcode unreadable Subcode failure Spindle defective defect severe vibration 14 ELECTRIC Mirror failure Unrecorded CD R The disc is upside down defects vibration 17 ELECTRIC Set up failure AGC protect failed Defects disc upside down severe vibration 19 ELECTRIC Set up failure Tracking error waveform is too unbalanced 50 or level is too small The pickup unit or tracking error circu...

Страница 48: ...48 KEH P7850 7 3 BLOCK DIAGRAM D C B E A F ...

Страница 49: ...ns the initial operations required before you can listen to music Note Loading a cassette in this product Refer to page 7 1 Select the desired source e g tuner 7 Head Unit 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 7 Remote Controller Each press of the button selects the desired source in the followin...

Страница 50: ...play for 4 seconds when a metal or chrome tape is inserted Nothing is displayed for a normal tape Cassette Loading Slot Elapsed Play Time Indicator Note The continuous playback time count starts at 00 00 at the following times When a tape is inserted When the tape direction is changed When you rewind the tape side currently playing back to the beginning The continuous playback time count is halted...

Страница 51: ...nt you from using the ITS function If you try and use this function NOT READY is displayed If this happens reading of information begins again when you switch to a component other than the 50 Disc type Multi CD Player If the multi CD player cannot operate properly an error message such as ERROR 14 is dis played Refer to the multi CD player owner s manual If there are no discs in the multi CD playe...

Страница 52: ... you continue pressing the button for longer than 0 5 seconds you can skip broadcasting stations Seek Tuning starts as soon as you stop pressing the button Note stereo indicator lights when a stereo station is selected Basic Operation of CD Player one disc only This product can control a CD player one disc only Track Search and Fast Forward Reverse You can select between Track Search or Fast forwa...

Страница 53: ...t black See the section DFS Alarm Installation Rear output Left Right System remote control Front speaker Rear speaker Front speaker Front speaker White yellow Brown Rear speaker Rear speaker Power amp sold separately Front output Power amp sold separately To terminal always supplied with power regardless of ignition switch position To electric terminal controlled by ignition switch 12 V DC ON OFF...

Страница 54: ... 6 dB when boosted Level 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 19 000 Hz 3 dB Stereo separation 45 dB Signal t...

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