Fisher DTA-100 Service manual

Service Manual

FILE NO.

REFERENCE No. SM5810251

PRODUCT CODE No. 164 065 06

Desktop Audio System

DTA-100 (DE)

CONTENTS

Specifications ...................................................................1

Laser beam safety precaution .......................................... 1

Tuner adjustment ............................................................. 2

Exploded view (cabinet and chassis) ...............................3

Parts list ........................................................................... 4

IC block diagram and description ..................................... 6

IC & Transistor voltage .................................................... 8

Schematic diagram .......................................................... 10

Wiring diagram (CD MAIN A SIDE).................................. 12

Wiring diagram (CD MAIN B SIDE).................................. 13

Wiring diagram (DISPLAY & HEADPHONE) ................... 14

Wiring connection ............................................................ rear

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• Pickup that emits a laser beam is used on this CD section.

CAUTION : USE OF CONTROLS OR ADJUSTMENTS OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.

LASER OUTPUT................ 0.6 mW Max. (CW)

WAVE LENGTH ................. 790 nm

LASER BEAM SAFETY PRECAUTION

CAUTION – INVISIBLE LASER RADIATION WHEN OPEN AND INTERLOCKS DEFEATED. AVOID EXPOSURE TO BEAM.

ADVARSEL – USYNLIG LASER STRÅLING VED ÅBNING, NÅR SIKKERHEDSAFBRYDERE ER UDE AF FUNKTION, UNDGÅ UDS ÆTTELSE FOR STRÅLING.

VARNING – OSYNLIG LASER STRÅLNING NÄR DENNA DEL ÄR ÖPPNAD OCH SPÄRR ÄR URKOPPLAD. STRÅLEN ÄR FARLIG.

VORSICHT – UNSICHTBARE LASERSTRAHLUNG TRITT AUS, WENN DECKEL GEÖFFNET UND WENN SICHERHEITSVERRIEGELUNG ÜBERBRÜCKT IST. NICHT, DEM STRAHL AUSSETZEN. VARO – AVATTAESSA JA SUOJALUKITUS OHITETTAESSA OLET ALTTIINA NÄKYMÄTTÖMÄLLE LASERSÄTEILYLLE. ÄLÄ KATSO SÄTEESEEN.

SPECIFICATIONS

(CD PLAYER SECTION)

Channels ...............................2 channels stereo

S/N ratio ................................ 60 dB

Wow & Flutter........................Below measurable limits

Sampling frequency .............. 44.1 kHz

Quantization ..........................16 bits linear/ch

Pickup light source ................Semi-conductor laser

Pickup wave length ............... 790 nm

Laser output .......................... Continuous wave max. 0.6 mW

(RADIO SECTION)

Tuning range .........................FM : 87.5 - 108 MHz

AM : 522 - 1,611 kHz(9 kHz step)

(GENERAL SECTION)

Power output .........................AC : 1.5 W/ch (10% T.H.D)

Speaker ................................. 8 cm x 2, 4ohm

Terminal impedance ............. PHONES : 32 ohms

Power source ........................ DC : 9 V (AC adaptor)

Dimensions ........................... 430 (W) x 150 (H) x 50 (D) mm

Weight (approx.)....................1.5 kg (Without including batteries)

This is a basic specifications. Specifications subject to change without notice.

TUNER ADJUSTMENTS

c. FM ADJUSTMENT Band switch : FM

Adjusting Equipment Step Gen. Set Radio To obtain MAX. output adjust.

Circuit Connection freq. freq. To Measurement

FM Connect Digital Voltmeter to

band

Collector of Q404

Tracking Connect VTVM and 4 ohm

load across speaker terminals. Signal Generator to ANT. Output level must be below reference output. 5 Repeat steps 3 and 4 obtain Maximum output.

This is a basic adjustments.

• Use a plastic screw driver for adjustments.

• Adjust the intermediate frequency of AM and FM to the frequency of ceramic filter.

• Set of unit Supply voltage : DC 12V Speaker : 8 ohms Standard output : 50 mW Function switch : RADIO

a.PARTS LOCATION

b. AM ADJUSTMENT Band switch : AM

Adjusting Equipment Step Gen. Set Radio To obtain MAX. output adjust.

Circuit Connection freq. freq. To Measurement

AM Connect Digital Voltmeter to

band

Tracking Connect VTVM and 4 ohm

Collector of Q404

load across speaker terminals. Signal Generator coupled by a loop antenna. Output level must be below Repeat steps 4 and 5 obtain Maximum output. reference output.

1 T702

450kHz 1611kHz

522kHz 522kHz

1611kHz 1611kHz

603kHz

1404kHz

87.5MHz

107.9MHz

90.1MHz

106.1MHz

603kHz

1404kHz

87.5MHz

107.9MHz

90.1MHz

106.1MHz

T701 (Adjust the voltage to 1.42 +/- 0.2V)

Confirm the voltage to 7.05 +/- 0.3V

L703 ant. Coil.

TC702 ANT-TRIMMER.

T701 (Adjust the voltage to 4 +/-0.2V)

Confirm the voltage to 8.1 +/- 0.2V

L702(FM RF coil)

TC701 ANT-TRIMMER.

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EXPLODED VIEW(CABINET & CHASSIS)

Y14

Y02

Y03

Y04

Y05

Y06

Y07

Y08

Y09

Y10

Y12

Y13

Y10

Y11

Y09

Y06

Y02

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PARTS LIST

PRODUCT SAFETY NOTICE

EACH PRECAUTION IN THIS MANUAL SHOULD BE FOLLOWED DURING SERVICING. COMPONENTS IDENTIFIED WITH THE

IEC SYMBOL OF SPECIAL SIGNIFICANCE. WHEN REPLACING A COMPONENT IDENTIFIED , USE ONLY THE REPLACEMENT PARTS DESIGNATED, OR PARTS WITH THE SAME RATINGS OF RESISTANCE, WATTAGE OR VOLTAGE THAT ARE DESIGNATED IN THE PARTS LIST IN THIS MANUAL. LEAKAGE-CURRENT OR RESISTANCE MEASUREMENTS MUST BE MADE TO DETERMINE THAT EXPOSED PARTS ARE ACCEPTABLY INSULATED FROM THE SUPPLY CIRCUIT BEFORE RETURNING THE PRODUCT TO THE CUSTOMER.

CAUTION : Regular type resistors and capacitors are not listed. To know those values, refer to the schematic diagram.

PACKING & ACCESSORIES

REF.NO. PART NO. DESCRIPTION

CABINET & CHASSIS

REF.NO. PART NO. DESCRIPTION

1 645 045 5346 CD DOOR LENS 3 645 045 4714 ASSY CD LID 8 645 045 6015 METAL COVER,DISPLAY PCB 9 645 045 5544 CD LID OPEN SPRING 10 645 045 4684 ASSY CABINET FRONT 11 645 045 6008 GEAR MOUNTING BKT 12 645 045 6053 GEAR DAMPER,29TO-E 13 645 045 5964 CD DOOR OPEN KNOB 14 645 045 7548 DOOR OPEN HOOK 15 645 045 5537 OPEN KNOB SPRING 16 645 042 1532 CUSHION RUBBER,CD MECHA 17 645 045 6039 MECH MTG PLATE A 19 645 045 4707 ASSY CABINET REAR 20 645 045 5353 STAND ADAPTOR,SPK L/R, UNIT 21 645 045 5261 STAND REAR CAB UNIT/SPK 22 645 045 5698 STAND RUBBER FOOT NATURE RUBB

23 645 051 1455 ASSY MOUNTING BAR,SCREW 24 645 045 4639 ASSY SPK NET A 25 645 045 4653 ASSY SPK FRONT 26 645 053 4812 ASSY SPK REAR L 27 645 053 4805 ASSY SPK REAR R 28 645 045 5926 CD MECHA TPP33B,KIT 29 645 045 5971 TOP FUNCTION KNOB 30 645 045 5438 SENSOR LENS,W/TAPE

FIXING PARTS

REF.NO. PART NO. DESCRIPTION

Y02 645 036 5911 TAPPING SCR 1.7X4,DISPLAY BD Y03 645 045 5513 MACHINE SCR 2X3,

Y04 645 042 1563 TPP SCR 2X4,

Y05 645 045 5520 FBIRE WASHER,DOOR OPEN HOOK Y06 645 042 1563 TPP SCR 2X4,

IN THE PARTS LIST AND THE SCHEMATIC DIAGRAM DESIGNATE COMPONENTS IN WHICH SAFETY CAN

Regular type resistors are less than 1/4W carbon type and chip resistors. Regular type capacitors are less than 50V and less than 1000µF of Ceramic type and Electrolytic type.

REF.NO. PART NO. DESCRIPTION

Y07 645 045 5469 TAPPING SCR 2X6,

MECH MTG PLATE TO F CAB

MAIN PCB TO F CAB

JACK PCBTO REAR CAB

SPK REAR CAB TO SPK CAB

W/MONO PLUG SPK L/R

645 053 4324 INSTRUCTION MANUAL 645 053 4331 CARTON INNER 645 031 1703 POLYBAG 645 045 5636 POLY BAG,I/B 645 045 5629 POLY BAG,MAIN UNIT 645 045 6770 POLYFOAM,SPEAKER PORTECT 645 051 1639 POLYFOAM SHEET 645 051 1646 POLYFOAM SHEET 645 053 4355 CARTON OUTER FOR 4 SE 645 045 6114 GIFT BOX HANDLE

645 051 1547 AC ADAPTOR 645 045 6732 REMOTE CTL,FISHER 645 045 4646 ASSY SPK NET B

Y08 645 045 5469 TAPPING SCR 2X6,

Y09 645 045 5469 TAPPING SCR 2X6,

Y10 645 031 3684 TAPPING SCR2X10,REAR CAB Y11 645 045 5483 TAPPING SCR 2X23,REAR CAB Y12 645 045 5490 TAPPING SCR 3X6,SPK TO SPK F CAB Y13 645 045 5506 TAPPING SCR 3X20,

Y14 645 045 5551 PHOTO LENS SCR NUT,W/NI-PLATED

ELECTRICAL-PARTS

REF.NO. PART NO. DESCRIPTION

54 645 045 5209 SPEAKER 3",W/BLACK CAP 55 645 045 5902 SPEAKER WIRE,

DISPLAY P.W.BOARD ASSY

REF.NO. PART NO. DESCRIPTION

71 614 316 3459 ASSY,PWB,DISPLAY(Only initial) D0901 645 031 3653 DIODE 1N4148 D0902 645 031 3653 DIODE 1N4148 D0903 645 031 3653 DIODE 1N4148 D0904 645 031 3653 DIODE 1N4148 D0905 645 031 3653 DIODE 1N4148 D0906 645 031 3653 DIODE 1N4148 D0907 645 031 3653 DIODE 1N4148 D0908 645 031 3653 DIODE 1N4148 D0909 645 045 5797 LED D0910 645 045 5797 LED D0911 645 045 5797 LED D0912 645 045 5797 LED IC901 645 045 4905 RPM6938-V4 S0901 645 045 5155 SW TACT,PLAY S0902 645 045 5155 SW TACT,STOP S0903 645 045 5155 SW TACT,TU-DN S0904 645 045 5155 SW TACT,TU-UP S0905 645 045 5155 SW TACT,MODE S0906 645 045 5155 SW TACT,PROG S0907 645 045 5155 SW TACT,PRESET-DN S0908 645 045 5155 SW TACT,PRESET-UP S0909 645 045 5155 SW TACT,BAND

645 045 5278 DISPLAY BRACKET,037DTA100240AA 645 045 5322 BACK LIGHT LENS,037DTA100470AA 645 045 5919 LCD DISPLAY,SDT-A232-TP-O TN POS 645 045 6022 LCD BRACKET

GEAR TO GEAR MTG BKT

GEAR MTG BKT TO F CAB

DOOR OPEN HOOK TO F CAB

645 045 6060 PVC SPL SHEET 645 045 6091 FLEXIBLE WIRE 18P,

TO MAIN BD CN401

645 045 6107 FLEXIBLE WIRE 19P,

TO MAIN BD CN402 645 036 5942 TAPPING SCR1.7X2,DISPLAY 645 045 7678 ZEBRA CONNECTOR

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