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Kenwood MDX-F1 Service Manual

Md personal stereo system
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MD PERSONAL STEREO SYSTEM
MDX-F1
SERVICE MANUAL
Panel ass'y
(A60-1729-02) : S
(A60-1803-02) : R
Knob
(K29-7718-03) : S
(K29-7750-03) : R
Cassette holder
(A53-2174-02) : S
(A53-2188-02) : R
S : silver
R : red
In compliance with Federal Regulations, following are
reproductions of labels on, or inside the product relating to
laser product safety.
Note: Please contact KENWOOD service in your side if
you want to get the AC power cord.
Knob
Front glass
(K29-7669-02)
(B10-3541-03)
0
Front glass
(B10-3540-04)
Rod antenna
(T90-0828-05)
AC IN
Miniature phone jack
(E11-0399-05)
KENWOOD-Crop. certifies this equipment conforms to
DHHS Regulations No.21 CFR 1040. 10, Chapter 1, Sub-
chapter J.
DANGER : Laser radiation when open and interlock
d e f e a t e d .
AVOID DIRECT EXPOSURE TO BEAM.
Knob
(K29-7669-02)
Knob ass'y
(K29-7753-04) : S
(K29-7755-04) : R
Plastic cabinet
(A02-2949-01) : S
(A02-2950-01) : R
AM
FM 75
GND
ANTENNA
* Refer to parts list on page 40 .
Panel
(A29-1078-04)
Lock terminal board
(E70-0051-05)
70%

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  Summary of Contents for Kenwood MDX-F1

  • Page 1 J. laser product safety. DANGER : Laser radiation when open and interlock Note: Please contact KENWOOD service in your side if d e f e a t e d . you want to get the AC power cord. AVOID DIRECT EXPOSURE TO BEAM.
  • Page 2: Table Of Contents

    MDX-F1 CONTENTS / ACCESSORIES / CAUTIONS Contents CONTENTS / ACCESSORIES / CAUTIONS..... 2 PC BOARD .............. 20 CONTROLS ..............3 SCHEMATIC DIAGRAM .......... 26 DISASSEMBLY FOR REPAIR........4 EXPLODED VIEW ............38 CIRCUIT DESCRIPTION ..........5 PARTS LIST..............40 ADJUSTMENT ............16 SPECIFICATIONS ........Back cover Accessories...
  • Page 3: Controls

    ( The displays given in this manual are approximations only. Main unit Display They may differ from what actually appears on the display.) Top panel PUSH OPEN button ¶ ¶ REPEAT RANDOM SLEEP A.P.S. O.T.T . PROG. TRACK NO. TOTAL AUTO TUNED STEREO...
  • Page 4: Disassembly For Repair

    MDX-F1 DISASSEMBLY FOR REPAIR How to Remove Door Ass'y How to Disassemble Front Panel and Rear Insert the screw driver to contact of door ass'y and sub Panel panel if remove door ass'y. 1 Remove 3 screws from bottom side(1X3).
  • Page 5: Circuit Description

    MDX-F1 CIRCUIT DESCRIPTION 1. Initialization P.CH BAND FREQ P.CH BAND FREQ 630kHz 76.00MHz 1-1 Setting 1440kHz 76.00MHz Insert the AC power cord with pressing the REPEAT key. 106.00MHz 76.00MHz 1-2 Operation 531kHz 97.50MHz Display shows "INITIALIZE" if the unit works in initializa- 76.00MHz...
  • Page 6 MDX-F1 CIRCUIT DESCRIPTION ACTIVE Port # Port Name Descriptions FL DATA Output port for FL driver open FL CLK Clock output port for FL driver CD DOOR SW2 CD DOOR OPEN sensor switch K DATA Data transmission port to MD(UART)
  • Page 7 MDX-F1 CIRCUIT DESCRIPTION 5. Voltage Key Matrix (port # of IC601) Voltage of Key 0~0.35V 0.5~0.9V 1.0~1.5V 1.6~2.1V 2.2~2.8V 2.9~3.4V 3.5~4.0V 4.1~4.6V 4.8~5.0V KEY1(#91) SOUND REPEAT MENU MD EJECT MD REC TAPE REC TUNER TAPE SKIP KEY2(#90) POWER STOP SKIP UP...
  • Page 8 MDX-F1 CIRCUIT DESCRIPTION Port # Port Name Description 68,69 No use PCNTO Power control output port EJECT No use LDON Laser diode on signal port(H:ON) AD/DA converter selector (in or out) SBSY Synchro signal input port DAPON No use DFSO...
  • Page 9 MDX-F1 CIRCUIT DESCRIPTION 7-4 Key Operation in Test Mode 7-4-1 Tuner Mode Display Descriptions STOP Normal mode Select the receiving mode of AUTO(STEREO) or MANUAL(MONO) SOUND Normal mode Select the preset memory by ten step. î10î20î30î40î00(--)î MD REC TUNING DOWN/UP...
  • Page 10 MDX-F1 CIRCUIT DESCRIPTION 7-4-4 MD SECTION 1. Preparation for Adjustment(MD-2) You have to carry out the following test mode items if replace MD mechanism, pickup, head and pc board. 1-1 Procedure 1. Short-circuit #4(vss) and #7(wp) of IC1402(EEPROM). 2. Set the unit to test mode and carry out the every adjustment in test mode.
  • Page 11: Test Mode

    MDX-F1 CIRCUIT DESCRIPTION • Canceling the test mode When the POWER button is pressed, the test mode is canceled, and the POWER OFF state is set. • Test Mode 1. AUTO pre-adjustment mode ¥ Automatic pre-adjustment is performed. (After adjustment the grating adjustment mode is set.) ¥...
  • Page 12 MDX-F1 CIRCUIT DESCRIPTION 3. AUTO FAB adjusting mode Step No. Setting Method Remarks Display Step 1 T est mode STOP state Step 2 Press the MD REC button three times AUTO FAB adjustment menu [_AUT_FAB_ _] Step 3 Press the MD PLAY button 1 time End of automatic adj.
  • Page 13 MDX-F1 CIRCUIT DESCRIPTION 5. RESULT mode (final adjustment) Setting Method Step No. Remarks Display Step 1 Test mode STOP state [ t s m Step 2 Press the MD REC button 5 times. RESULT menu [ _ R S T U L T _ _ _ ] Step 3 Press once the MD PLAY button.
  • Page 14 MDX-F1 CIRCUIT DESCRIPTION When the FF(¡)button in remote controller is pressed while the setting is displayed, the setting increases, and a new setting is stored in RAM. When the FB(1)button in remote controller is pressed while the setting is displayed, the setting increases, and a new setting is stored in RAM.
  • Page 15 MDX-F1 CIRCUIT DESCRIPTION 9. TEST-REC mode Step No. Setting Method Remarks Display Step 1 Test mode STOP state [ t s m Step 2 Press the TAPE button twice. TEST-REC menu [ T E S T _ R E C _ _ ]...
  • Page 16: Adjustment

    MDX-F1 ADJUSTMENT CD player adjustment INPUT OUTPUT PLAYER ALIGNMENT ITEM ALIGN FOR FIG. SETTING SETTING SETTING POINT Step 1~3 are in TEST MODE TEST MODE : While pressing the [CD] key, plug the AC power cord into the AC power wall outlet.
  • Page 17 MDX-F1 ADJUSTMENT Cassette Deck adjustment INPUT OUTPUT DECK ALIGNMENT ITEM ALIGN FOR FIG. SETTING SETTING SETTING POINT Unless otherwise specified, set the respective switches as follows: 0dBs=0.775V SOUND MODE: OFF TONE: FLAT ø. Cassette mechanism unit (Adjustment of the REC / PLAY head)
  • Page 18: System Connections

    MDX-F1 ADJUSTMENT SYSTEM CONNECTIONS FM 75½ ANTENNA AC IN Fig.1 Headphone plug PHONES JACK Fig.4 AC VTVM (GND) oscilloscope Freq. counter VR201 AC voltage FE BIAS CN101 VR401 BIAS VR402 BIAS Fig.2 Fig.3...
  • Page 19 E35-2463- 5 E35-2464- 5 E35-2443- CN503 CN502 CN501 INLET PCB CD DOOR SWITCH SELECTOR PCB VOLUME PCB DISPLAY PCB J351 (M) : AC110-120V/220-240V~ 50/60Hz (X09- ) (H/8) (X09- ) (G/8) (X09- ) (F/8) (X09- ) (E/8) (X09- ) (D/8) MDX-F1...
  • Page 20: Pc Board

    PC BOARD (Component side view) C1707 IC1702 C1509 C1606 Q1700 R1704 R1516 C1304 R1513 R1705 R1511 Q1701 R1703 C1701 C1704 C1710 C1712 L1701 R1712 C1716 R1711 C1803 C1800 R1714 C1700 C1711 C1714 C1501 Q1501 R1612 IC1300 R1614 R1808 Q1801 C1802 Q1800 Q1805 D1401...
  • Page 21: Schematic Diagram

    PC BOARD (Component side view) TO MD MAIN PWB CN1101 MAGNET HEAD(34) RECORD TO MAGNET HEAD CW1501 FLEXIBLE CW1903 TP1543 TP1701 TP1702 TP1520 CN1501 TP1519 TP1301 TP1521 TP1530 TP1300 TP1517 R1301 TP1515 TP1512 C1512 R1533 R1535 R1537 TP1507 R1528 C1300 TO MD MAIN PWB TP1514 TP1531...
  • Page 22 PC BOARD (Component side view) X09-6400-00 A/8 (J70-1352-11) Q407 W501 R218 W504 R441 R205 Q412 R219 C424 Q408 R212 R436 R206 R215 W502 C205 R204 C425 R203 R210 R445 R437 D404 R201 R211 C426 R202 Q415 R213 W601 W508 C201 D403 C219 C421...
  • Page 23 PC BOARD (Component side view) X09 F/8 X09 D/8 X09 E/8 S551 TAPE REC R572 S552 MD REC CN502 S566 VOL/ MULTI R577 S555 MENU S557 SOUND R574 R576 MD EJECT SET S556 REPEAT X09 G/8 X09 G/8 WH703 R701 C701 C618 C628...
  • Page 24 -A151 +12V +12V +12V +12V 1/4W 11.8V DATA : LA1837M : KV1260TS2 or : LC72131M SVC342 D2-4 : HVU202A TR1 : 2SK360IGE,F MTZ5.1B TR2 : 2SC2714Y,GR DA204K TR3 : 2SC2413KP,Q 2SC2412KR,S TR7 : DTA114EKA 7.2MHz TR14 : FMG9A MDX-F1 (M)
  • Page 25 MD MECHANISM (MDM-99) CN1401 F0554AW-A (LOADING PWB) R1930 WRITE L1300 CN1931 CW1931 SW1930 47uH LOADING LOADING IC1301 R1932 MINF DISC ID MINF C1302 C1303 R1931 (5V) (5V) R1304 +4.8V +4.8V +4.8V SW1931 TRY- TRY- (1.4V) (1.4V) TRY+ TRY+ (1.4V) (1.4V) LOAD (2.5V) (2.5V)
  • Page 26 : 2SA1314C IN5- 3.2V OUT5 IN2- D1300 : SBE803 D1401 : SB00703Q IN2+ D1402 : 1SS355 IN5- IN5+ MUTE1 IN4+ DIGITAL LINE MUTE2 +3.2V +3.2V SIGNAL LINE IN4- SS.GND GND LINE B LINE VREF OUT4 C1607 VREF0 MDX-F1 (1/3) MDX-F1 Y39-3430-21...
  • Page 27 CD MECHANISM ASS’Y (D40-1660-05) (X09-640X-XX) (A/8) PICKUP ASS’Y (KCP3H) A151 +6.2V TUNER PACK R261 C207 0.047 W02-CN1 W02-CN2 IC202 TRK+ TRK+ TRK- TRK- 4ch BTL IC201 3.1V 6.2V DRIVER (BOTTOM VIEW) CD RF 2.5V VR1 (3.3K) D201 POWVCC L201 R218 R219 5.0V 10uH...
  • Page 28 +5.1V R454 100 X09-D/8 +6.2V +6.2V +6.2V PACK-SW R455 100 -CN501 REC-P R456 REC-R MDX-F1(2/3) MDX-F1 DOLBY and the double-D symbol are trademarks of Dolby Laboratories Licensing Corporation. Noise reduction circuit made under license from Dolby Laboratories Licensing Corporation. Y39-3430-21...
  • Page 29 (X09-640X-XX) (B/8) (X09-640X-XX) (D/8) : XC62HR5102P : TA7812S ED501 IC351 : BA5416 AMP R IC352 : NJM4565MD SP/SE-GND IC501 : LC75710NED AMP L Q1,12,16,505,509 : 2SC4081(R,S) or TAPE REG/SE-GND 2SD1819(Q,R) REPEAT RANDOM SLEEP A.P.S. O.T.T. PROG. TAPE AVR-GND : 2SA1175(F,E) or 2SA933AS(Q,R) R D S : 2SD2012 or...
  • Page 30 OSCO AM23 NJM4565MD IC501 AM24 (BOTTOM VIEW) AM25 FL DRIVER AM26 TEST AM27 AM28 AM29 AM30 AM31 AM32 CXA1571M R561 22K R560 22K R559 22K Q501 Q503 R558 22K R557 22K FL GRID DRIVER Q505 CXD2587Q MDX-F1 (3/3) MDX-F1 Y39-3430-21...
  • Page 31: Exploded View

    MDX-F1 EXPLODED VIEW (MD MECHANISM) M1.4x1.5 (BLK) N39-1415-45 N38-2020-41 M1.4x2.5 N09-3434-08 CW1931 M1.7x5 (BLK) N39-1750-45 M903 1.4x3 N09-5197-08 SW1932 1.7x6 N09-5198-08 SW1934 (MDLM) SW1931 SW1933 1.4x4.5 (BLK) N39-1445-45 N09-5199-08 1.7x3 N09-5200-08 SW1930 WASHER N16-0014-46 N39-1730-45 M1.7x3 (BLK) 1.4x5 (BLK) N39-1450-45...
  • Page 32 (D/8) S565 S558 S559 TUNER TAPE STOP S561 S562 S563 S560 S564 SOUND REPEAT (F/8) FM/AM ¥TUNING MODE S556 S557 CW1501 MENU S555 ¥VOLUME/ (DEMO) MULTI CW1501 CONTROL S554 S566 EJECT ¥TAPE REC ¥MD REC S553 S551 S552 (E/8) MDX-F1...
  • Page 33 Description Ref. No Parts No. Description ress Parts nation marks marks ress Parts nation H50-3668-04 ITEM CARTON CASE MDX-F1 M1: SILVER, M2: RED J02-1470-05 INSULATOR BLUE A02-2949-01 PLASTIC CABINET J02-1471-05 INSULATOR PINK A02-2950-01 PLASTIC CABINET J11-0852-03 CLAMPER ASSY A09-1151-08 BATTERY COVER...
  • Page 34 New Parts New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 35 New Parts New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 36 New Parts New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 37 New Parts New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 38 New Parts New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 39 New Parts New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 40 New Parts New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 41: Parts List

    Frequency response ......... 20 Hz~20 kHz Speaker unit ........80 mm, cone type Wow and flutter ....Less than unmeasurable limit KENWOOD follows a policy of continuous advancements in development. For reason specifications may be changed without notice. Notes ÷ The full performance may not be exhibited in an extremely cold location (under a water-freezing temperature).