Fisher DSC 204 Service Manual

Page 1

SERVICE MANUAL

FISHER

DIGITAL
COMPACT DISC PLAYER DAG-204
(EUROPE)

137 325 42

SPECIFICATIONS

System ................. Compact disc digital audio system Program Functions ........... 32 selections
Program Reset ........ Press CLEAR button
AUDIO CHARACTERISTICS Checking Program ..................... With CHECK button
Frequency Response ................ 20 Hz A 20 kHz (in STOP mode)
:23ng Distortion Less thank/(300%) (1 32:; intro Scan ......................... 1 N 99 sec. programable
W at) """"""" B' """" ore :1]? 1 Scanning ........ 2 speed fast-forward/back with sound,
Cisw anosFlutter _ ' ' Melowtgneazgrsa :31 if: j 2 speed search in PAUSE mode
an Elam - 0'9 a" 2 Random Disc Play .......... Press RANDOM PLAY button
FUNCTIONS Total Disc Time Display Press DISPLAY button twice
Disc Selection ......................... With DISC NUMBER Repeal ................... All tracks, all programmed tracks

(1 ~ 5) buttons

. . GENERAL
Track Selection ........................ WithTRACK/lNDEX PowerRequirements(50 Hz) ________________ A0110/220V
NUMBER I0~ 9) buttons 20 Watts
Index Selection Wth $33821: (LnfcéTk/szi); Dimensions (W x H x D) r. 440 x113 x 290 mm
Wei ht a re. . .Ok

(normal disc play only) 9 ( pp X) 5 9

Program Selection .......... With DISC NUMBER (1 ~ 5),

+n.~.,....__t..v. twee. 9)

IS

REFERENCE No. WM-1 9866

Page 2

CABINET EXPLODED VIEW

CABINET PARTS LIST

fiat Part No. Description O'ty 5:1 Part No. Ducrlption d'ty
PACKAGE 4235202056 0111111100111 Ass] 1
131-2410354500 Label 1501111 2 42352-02067 Connector 11= Assy 1
13140110320903 Box Cnrmgate-Exp 1 1312131040571 Name Plate 10.111191 1
13141400945570 Pan tLEILl 1 I31 -6-41 59-38600 limes (Laser) 1
131 ~6-3009»%580 Pad (Right) 1 131-6415040200 NfltES (Lauri 1
1300305016350 Martina 811111 1 131 1574159740300 Notes man 1
141-1251022230 Sheet Polyethylene 1 141-2445044000 Cushtoh (Escutchm 11.10 1
1410455902001 Seriar 111 Sheet 2 141-2445044100 005111011 1555011111111 man 1
1947294142017 the 1
14176455003300 Seriat N0 Sheet 1
Acczssomss 1 13101015712200 Escuwhm 0111 4m 1
02359-79410 Connector 51 Assy 1 2 13101001414400 K1100 Track Me Assy 1
42369-74132 111119 61170 11124 1.0 at 1 3 1310100144500 K4100 Fumm Assy 1
131-5271010401 Baa Fan 1 4 13144110100011 1401.31 14011111 511111 1
141-s415t00645 10115 1 5 14105511100501 Gear ElnctAssy 1
142641193475 Explanatary Milt l 6 141012346902 Lid DIEM 1
7 14124352940300 $00011 0001 1
0 131-1441032000 0w 1
CABINET a cmssrs s 1312-1501-9000: 11mm 1
41352-02170 Comectnv 0114511 [01113) 1 10 13142-1501497000 Km 11111101 5
4 2152.02.74 Mwapwwwl 1 11 11417273201 12300 Angl-R-inl 1
44352-02348 Com-em: Pmy [CNS] 1 12 t31»2»3602-12701 Filter (Imam) 1
44352-02333 Connector 5P Assy lCW] 1 13 141 4141494 7300 Mdtntl Screen Assy 1
14352-02179 ConnemarSPMIy (CHIN l 15 11172715597332) K110080371 3
472352702722 CannecinrtPAssy 1 15 131-2410542400 Piile Bullnm 1
472352702665 001111110111 1 P Assy 1 17 1310-3301-3005 Chassts Math 1
42352702564 Cmnsclnr lPAssy 1 111 131 27331140900 Metai Mount 011119! 1

CABINET PARTS LIsTtContinued)

Part 114:.

g?!

Deicrlptlon 0-1, :7: Part Na. Descrlpllon O'ty

10 131-2421020400 511:1: 1 41 141-2421030101 Screw. 01110 1111. 7:09.11ng, +143 0110 5
20 1342.5103-1 1700 Spring 111311 1 42 417 093 9003 SCR 5is 13112 3101 14
21 14127351344400 13mm cum: 1 4:1 411 064 3607 5011 TF6 11111 31115 1
22 14123099710400 11mm Bustling 1 44 411 020 5500 SCH SvYPG 0112 2.6)(6 13
23 141-2-7429-0650D lesr Luck 1 45 411 006 2004 5011 we 0111 4x10 2
24 A 4231 2412550 51111111 3113231141: micron) 15106021 1 45 411 020 6406 son s-rvc 302 3x12 1
25 A 4443200500 9111421 00111 1 40 14334903412510 Screw. Elmer 1101:0010, 413.0125 1
26 A 44512-34020 Foam 7rans 1 49 411 020 110114 SCR S-TFG an: 340 14
27 131 7271 001-16200 Lac 4 50 411020 7700 Sea s-rpe 301 3x11 1
20 13127710400500 Ptat: Pan 51111011 1 st 411 021 was 51:11 5.110 3111 2x5 0

52 411 002 9104 son PAM 5010 2
31 141-0719397210515 Mam Pm. Ass; 1
32 1410th20542 Power P.C.B. Am 1 NOTES:
313 141-04mm mums Ass, 1 1. Parts order must contain Model Number, Part Number and
34 141-0499920522 001111111 no.0. Aw 1 Description.

2. Orderinu uuan111y pl screws and resistors 111051 be multiple 01

ID 111:».
PRODUCT SAFEYV NOTICE

Each precaution in this manual should be lollowed during servicing. Components identified with the IEC symbol A in
the parts list and the schematic diagram designate components in which salely can be at special significance. When
replacing a component identified with A. use only the replacement parts designated, 0! parts wlth the same ratings of
resistance. wattage or voltage that are designated in the parts list in this manual.

Leakagecurrenl or resistance measurements must be made to determine that exposed parts are acceptably
Insulated tram the sunnly circuit before returning the product to the customer.

SAFETY INTER LOCK

The Digital Compact Disc Player reads the disc signal by
detecting the laser beam. It must be avoided tor the human body
to directly receive the beam. Especialy human eyes are badly
attracted by the beam. Theretore, the unit is equipped with an
interlock to prevent the unnecessary laser outputs.

The laser outputs are controled by the injection or onto" oi the
constant voltage source to the laser diode with Pin 16 of 1C 901
tuPD752CtGG). When Pin 16 is in "L" (Lowl level. the laser emits
the beam. When Pin 16 is in 'H' (High) level. the laser GOES not
emit the beam.

Pin 16 is set in H" level when the unit is loaded with the disc
and it reads the index signals or thn the unit is set in the play
mode alter that. When the unit reads the index signals and the

loliowing two conditions are met. the laser emits the beam.

1

When the Loading Limit Switch is set in ON". (The disc is
set to the turntable.)

The pickup is located at the 3123 of the minimum Internal
circumlerence.

2

Alter the above conditions are met and the Index signals have
been read. the laser emits the beam when the lollowmg two
conditions are met.

I. When the PLAY button is pressed.
2. When the PLAY indicator is ON.