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Sanyo MCD-Z250F Service Manual

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Service Manual

Specifications

(Cassette Section)
Recording system ........................ AC bias, 4 track stereo
Erasing system.. ........................... Magnet erase
Tape speed ................................. .4.8 cm I sec.
Fast forward and rewind time.. ....
Frequency response ................... .60 - 14,000 Hz (Normal tape)
Section)
(CD
Channels ...................................... 2 channels
Wow & Flutter.. ............................. Undetectable
Sampling frequency ..................... 44.1 kHz
Quantization ................................ .16 bit s linear / ch
Pick up light source ...................... Semi-conductor laser
Pick up wave length .................... .790 nm
(Radio Section)
Tuning ranges .............................. FM
Antennas ...................................... Built-in ferrite bar and
CD Radio Cassette
Recorder
sec. (C-60 tape)
:
87.5 - 108 MHz
AM:522-1,611 kHz
telescoping rod antennas
MCD-Z250F
PRODUCT CODE No.
142 660 10
(General)
Output power . . . . . . . . . . . . . . 2.8 W/ch (DIN music)
Speaker . . . . . . . . . . . . . . . . . . . . . . . 10 cm x 2, 8 ohms
Terminal impedance
PHONES . . . . . . . . . . . . . . . . . 32 ohms
Power source . . . . . . . . . . . . . . AC
DC
Tuner memory back-up batteries
Remote control unit
Dimensions . . . . . . . . . . . . . . . . . 412 x 158 x 239 mm (W x H x D)
Weight (approx.) . . . . . . . . . . 2.8 kg (without batteries)
Specifications subject to change without notice.
REFERENCE No. SM580826
FILE NO.
(XE)
:
230 V, 50 Hz
:
12 V (8 "R14/C" batteries)
DC 6 V, 4 "RGIAA" batteries
:
DC 3 V, 2 "RGIAA" batteries
:

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Summary of Contents for Sanyo MCD-Z250F

  • Page 1: Specifications

    FILE NO. MCD-Z250F Service Manual CD Radio Cassette (XE) Recorder Specifications PRODUCT CODE No. 142 660 10 (Cassette Section) (General) Recording system ......AC bias, 4 track stereo Output power ....2.8 W/ch (DIN music) Erasing system..

  • Page 2: Laser Beam Safety Precautions

    LASER B E A M SAFETY PRECAUTIONS Pick-up that emits a laser beam is used in this CD player. CAUTION USE OF CONTROLS OR ADJUSTMENTS OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION CAUTION -INVISIBLE LASER RADIATION WHEN OPEN AND EXPOSURE INTERLOCKS DEFEATED.

  • Page 3: Removal And Installation

    REMOVAL AND INSTALLATION d. CD MECHANISM e. CD P.W.BOARD g. DISPLAY P.W.BOARD f. OPEN I CLOSE P.W.BOARD OPEN/CLOSE P.W.S h. MAIN P.W.BOARD BLOCK...
  • Page 4 REMOVAL AND INSTALLATION i. TUNER P.W.BOARD FRONT ‘C-MECHA (HEAD)-- C-MECHA &MOTOR SPEAKER - TAPE MECHANISM...
  • Page 5 REPLACEMENT OF CD MECHANISM Note that the mechanism of the CD player is very delicate. is very important that the spindle motor (witch rotates the disc), and the sled motor (which cases the disc signals to be tracked), as well as the gear and other components, operate smoothly, without eccentricity. When handling the pickup, take care not to exert excessive force, and particular care should be taken not to touch the lens or the drive circuit’s P.W.Board pattern.
  • Page 6 REPLACEMENT OF CD MECHANISM c. Replacement and lubrication of the pickup Before replacement of the pickup, be sure to carefully read the section regarding the pickup when the unit is moved or transported. Remove a pickup rail (CM2) with a driver from the bottom of chassis.
  • Page 7 REPLACEMENT OF CD MECHANISM f. Resetting the pickup to the home position (1) The limit switch is switched ON by the projection of this rack gear secured to the returned pickup, after which the sled motor continues to operate (by the circuit) for approximately 30 msec. There is then again a reverse operation, and movement to the position at which the switch is switched OFF.

  • Page 8: Tuner Adjustments

    TUNER ADJUSTMENTS Use a plastic screw driver for adjustments. Adjust the intermediate frequency of AM and FM to the frequency of ceramic filter. Supply voltage DC 12.OV Phones impedance 32 ohms Function switch RADIO a. Parts Location CT201 XF213 AM Adjustment BAND SELECT SWITCH Input Connection Output Connection...

  • Page 9: Tape Adjustments

    TAPE ADJUSTMENTS a. Adjusting Azimuth Be sure to clean the heads before attempting to make any adjustment. Be sure both channel’s waveform are the same for the phase matching. Be sure both channels (1 and 2) are the same level using a dual-channel oscilloscope. After completion of the adjustment, apply the threadlock (TB-1401 B) to the azimuth adjustment screws to fix them securely.

  • Page 11: Parts List

    PARTS LIST PRODUCT SAFETY NOTICE EACH PRECAUTION IN THIS MANUAL SHOULD BE FOLLOWED DURING SERVICING. COMPONENTS IDENTIFIED WITH THE IEC SYMBOL A IN THE PARTS LIST AND THE SCHEMATIC DIAGRAM DESIGNATED COMPONENTS IN WHICH SAFETY CAN BEOF SPECIAL SIGNIFICANCE. WHEN REPLACING A COMPONENT IDENTIFIED BY A, USE ONLY THE REPLACEMENT PARTS DESIGNATED, OR PARTS WITH THE SAME RATINGS OF RESISTANCE, WAlTAGE OR VOLTAGE THAT ARE DESIGNATED IN THE PARTS LIST IN THIS MANUAL.
  • Page 12 PARTS LIST P A R T N O . DESCRIPTION P A R T N O . DESCRIPTION REF.NO. REF.NO. 4 0 1 0 3 8 6 4 0 6 MT-GLAZE 4.7K JA l/low 4 0 5 0 1 4 4 5 0 9 TR 2SC2412K-R R1472 Q1781 401 037 5707...
  • Page 13 PARTS LIST DESCRIPTION REF.NO. PART NO. PART NO. DESCRIPTION REF.NO. 4102893508 IC CXP50712-120Q 4093784205 IC TA2068N 4093314501 645 012 0664 A 409295 IC TA8229K 7402 614 035 0494 V.H.F COIL IC S-8705OCF-VP 4092549409 6142290231 V.H.F COIL 6450014581 645 002 1534 6140342048 6142534656 A 6450142499...
  • Page 14 PARTS LIST TAPEMECHANISM (TM-PRlBTN-SH) PART NO. DESCRIPTION PART NCi DESCRIPTION REF.NO. s4951 645 013 0342 6450091742 SUPPLY REEL ASSY TM01 s4952 645 019 4115 6450091575 BACK TENSION SPRING TM02 VR421 645 019 4092 6450091674 RECORD SAFETY LEVER TM03 VR422 645 019 4108 6450091735 TAKE UP REEL ASSY TM04...
  • Page 15 EXPLODED VIEW (TAPE MECHANISM) $ - T M 3 1 & T M 3 2 TM33 TM54...

  • Page 16: Exploded View (Cd Mechanism)

    EXPLODED VIEW (CD MECHANISM) PARTS LIST CD MECHANISM (CD94C12-SH) PART NO. DESCRIPTION REF.NO. REF.NO. PART rj0. 6142377109 6142791912 6142377116 6142622575 645 006 7983 614 263 7739 6450188879 411 044 7502 SCR PAN+SW 2X5,SPINDLE MOTOR 6142622599 CM1-4 412 032 0208 SPECIAL WASHER, 614 238 6934 ADHESIVE ESCAPE STOP FLEXIBLE FLAT CABLE,PICK UP...

  • Page 17: Ic Block Diagram & Description

    FIN2 + FIN1 = RF, FIN2 - FIN1 = FE ut Pin for Track Error Sense Signal to Digital Constant Linear Vel It Control Level of Data-Slice by Digital Signal ut Pin of Data for Command from Micro 0 Output Pin of APC (Automatic Power Control) Circuit. Input Pin of APC (Automatic Power Control) Circuit.
  • Page 18 ICI 02 LC78822ED (Digital Signal Processor) Name Name Function No. 1 Pin Function of defect TEST3 I ITest pin. signal I Input terminal for test. 0 The phase comparison output terminal for external VC0 control. R V S S RCHO I 0 loutput terminal for R-ch RVDD MUTER 43 1...
  • Page 19 IC221 LC72131MD (PLL Frequency Synthesizer) IC412 TA8229K (AF Amplifier) “CC B.S. I IN- I IC413 S-8705OCF-VP (Voltage Regulator)
  • Page 20 (Micro Processor) Function Pin Name VO Function I Model select input SELECT I Synchronization recording start signal 42 SYNC-REC CQCK 0 Inter Face for DSP (Clock) I Inter Face for DSP (Command data output) COIN _CD segment signal for DSP (Sub0 data input) I Inter Fact SQOUT _CD segment signal...

  • Page 21: Wiring Connection

    WIRING CONNECTION LEFT SPEAKER RIGHT SPEAKER TAPE MECHANISM AMP 8. SYSCON P.W.B CD MECHANISM PICK-I BATTERY TERMINAL 1 P.W.B...

  • Page 22: Schematic Diagram (Tuner)

    SCHEMATIC DIAGRAM (TUNER)

  • Page 23: Wiring Diagram (Tuner)

    WIRING DIAGRAM (TUNER) TUNER P.W.B...
  • Page 24 WIRING DIAGRAM (CD)
  • Page 25 SCHEMATIC DIAGRAM (CD) MECHANISM P M - D A D - 9 4 C l This is a basic schematic diagram.
  • Page 26 C N 1 0 3...
  • Page 27 SCHEMATIC DIAGRAM (AMPLIFIER) PRODUCT SAFETY NOTICE Each precaution in this manual should bs followed during servicing. Components identified with list and the schematic diagram designated components in which safety can be of special sii component identified by use only the replacement pans designated, or parts with the same or voltage that are designated in the parts list in this manual.
  • Page 28 BEAT CANCEL he IEC symbol in the parts ratings of resistance, wattage asurements must be made to...
  • Page 29 WIRING DIAGRAM (AMPLIFIER & SYSCON) BATTERY TERMINAL - 2 P.W.B 28 -...

  • Page 30: Power Supply P.w.b

    AMPLIFIER & SYSCON P.W.B AC SOCKET P.W.B OPEN / CLOSE R/P SWITCH P.W.B SWITCH P.W.B POWER SUPPLY P.W.B...
  • Page 31 SCHEMATIC DIAGRAM (SYSCON)

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