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Sony WM-FX673 Service Manual
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Sony WM-FX673 Service Manual

Sony WM-FX673 Service Manual

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3 7 63 1515 0
SERVICE MANUAL
Ver 1.0 1999. 03
Dolby noise reduction manufactured under license
from Dolby Laboratories Licensing Corporation.
"DOLBY" and the double-D symbol a are trade-
marks of Dolby Laboratories Licensing Corporation.
TE
L 13942296513
www
.
MICROFILM
http://www.xiaoyu163.com
WM-FX673/FX877
x
ao
u163
y
i
http://www.xiaoyu163.com
2 9
8
Photo: WM-FX673
Model Name Using Similar Mechanism
Tape Transport Mechanism Type
SPECIFICATIONS
Q Q
3
6 7
1 3
1 5
RADIO CASSETTE PLAYER
co
.
9 4
2 8
Canadian Model
AEP Model
UK Model
Australian Model
E Model
WM-FX673/FX877
Chinese Model
Tourist Model
WM-EX670/EX672
MT-WMEX672-162
0 5
8
2 9
9 4
2 8
m
9 9
WM-FX673
WM-FX877
9 9

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Summary of Contents for Sony WM-FX673

  • Page 1 Australian Model WM-FX673 E Model WM-FX673/FX877 Chinese Model Tourist Model WM-FX877 Photo: WM-FX673 Dolby noise reduction manufactured under license Model Name Using Similar Mechanism WM-EX670/EX672 from Dolby Laboratories Licensing Corporation. Tape Transport Mechanism Type MT-WMEX672-162 “DOLBY” and the double-D symbol a are trade- marks of Dolby Laboratories Licensing Corporation.

  • Page 2: Table Of Contents

    SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COM- POSANTS QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.

  • Page 3: Servicing Notes

    http://www.xiaoyu163.com SECTION 1 3 7 63 1515 0 SERVICING NOTES This set detects the rotation of the idler gear (A) (side S) using the 3. FF, REW modes PH1 (photo reflector). The PH1 is mounted on the MAIN board, (1) Check that the preset state is set. therefore the idler gear (A) (side S) cannot be detected with the (2) Input the square wave or sine wave to the Q15-1 (COLLEC- MAIN board removed.
  • Page 4 http://www.xiaoyu163.com 3 7 63 1515 0 Slider (NR) Rotation system Rotation system during PLAY. gear (NR) (FWD : left side/ REV : right side) idler gear (A) (side S) idler gear (A) (side T) gear (REEL) (side S) gear (REEL) (side T) motor pulley slider (NR) cam gear...

  • Page 5: General

    http://www.xiaoyu163.com SECTION 2 This section is extracted from instruction manual. GENERAL 3 7 63 1515 0 (FX673) (FX877) L 13942296513 (FX673) (FX877) u163 – 5 – http://www.xiaoyu163.com...
  • Page 6 http://www.xiaoyu163.com 3 7 63 1515 0 (FX877) (FX673) (FX877) (FX673) L 13942296513 (FX673) (FX877) u163 – 6 – http://www.xiaoyu163.com...

  • Page 7: Disassembly

    http://www.xiaoyu163.com SECTION 3 DISASSEMBLY 3 7 63 1515 0 This set can be disassembled in the order shown below. Case Block Assy Main Board Belt (F2) Motor (Capstan/Reel) (M601) Ornament Lid Block Pinch Lever Block Assy, Holder (F) Assy Assy, Head, Magnetic (HP901) (N)/(R) Assy Reel...
  • Page 8 http://www.xiaoyu163.com 3 7 63 1515 0 MAIN BOARD 2 Remove four solders of leaf switch. 3 Remove two solders of plunger solenoid. 5 two screws 6 MAIN board 5 screw (M1.4) 4 Remove four solders of motor. 1 flexible board Note: On installation MAIN board adjust the S1 and slider.
  • Page 9 http://www.xiaoyu163.com 3 7 63 1515 0 MOTOR (CAPSTAN/REEL) (M601) 1 two screws (M1.4) 2 motor (capstan/reel) (M601) L 13942296513 LID BLOCK ASSY, CASSETTE 1 screw (M1.4 × 2) 5 lid block assy, cassette 2 two screws (M1.4 × 2) 3 Open the cassette lid. u163 4 shaft –...
  • Page 10 http://www.xiaoyu163.com 3 7 63 1515 0 ORNAMENT BLOCK ASSY, REEL 4 claw 5 ormanent block assy, reel 4 claw 3 boss 1 claw 1 claw 2 claw L 13942296513 HOLDER (F) ASSY 2 shaft 7 bracket (cassette) assy 5 lever (S), lock 3 lever (B), lock 1 two screws (M1.4 ×...
  • Page 11 http://www.xiaoyu163.com 3 7 63 1515 0 PINCH LEVER (N)/(R) ASSY 1 claw 2 Remove the pinch lever (R) assy in the dereciton of the arrow. 4 Remove the pinch lever (N) assy in the direction of the arrow. 3 claw L 13942296513 HEAD, MAGNETIC (PLAY BACK) (HP901) 1 claw...

  • Page 12: Mechanical Adjustments

    http://www.xiaoyu163.com SECTION 4 SECTION 5 MECHANICAL ADJUSTMENTS ELECTRICAL ADJUSTMENTS 3 7 63 1515 0 PRECAUTION PRECAUTION 1. Clean the following parts with a denatured-alcohol-moistened 1. Specified voltage : 1.3 V (DC) swab: 2. Setting playback head pinch roller BL SKIP : OFF rubber belts capstan...
  • Page 13 http://www.xiaoyu163.com 3 7 63 1515 0 0 dB=1 µV AM IF ADJUSTMENT TUNER SECTION Adjust for a maximum reading on level meter [AM] 450 kHz Setting: function : RADIO AM VCO VOLTAGE ADJUSTMENT BAND button : AM Adjustment Part Frequency Display Reading on Digital Voltmeter Put the lead-wire 531 kHz 1.5 ±...

  • Page 14: Diagrams

    WM-FX673/FX877 SECTION 6 6-2. BLOCK DIAGRAM – MAIN Section – DIAGRAMS B+ SWITCH DDC B+ 6-1. BLOCK DIAGRAM – TUNER Section – Q304 10.7MHz TUNER L-CH FM/AM IF AMP,FM/AM DET, MPX (Page 16) (Page 15) IC2 (1/2) FM RF AMP, MIX AMP, OSC...
  • Page 15 http://www.xiaoyu163.com w w w http://www.xiaoyu163.com...

  • Page 16: Schematic Diagram

    WM-FX673/FX877 6-4. SCHEMATIC DIAGRAM • • See page 27 for Waveform. See page 28 for IC Block Diagrams. w w w – 23 – – 24 – – 25 – – 26 – http://www.xiaoyu163.com...

  • Page 17: Ic Pin Function Description

    http://www.xiaoyu163.com • Waveform • IC Block Diagrams 6-5. IC PIN FUNCTION DESCRIPTION – MAIN BOARD – • MAIN BOARD IC3 TC9327AF-606 (SYSTEM CONTROLLER, LIQUID CRYSTAL DISPLAY DRIVER) IC1 TA7371AF-EL IC2 TA2022AFN-EL IC302 NJM2185AV-TE2 1 IC3 &¢ (X OUT) Pin No. Pin Name Description 500 mV/DIV, 5 µs/DIV...
  • Page 18 http://www.xiaoyu163.com 3 7 63 1515 0 Pin No. Pin Name Description BOOST CTL Bass boost control signal output to the TA2123AF (IC301) “L”: off, “H”: on Emphasizing sound control signal output to the TA2123AF (IC301) REVIVE CTL “L”: RV (revive), “H”: normal/MB (mega bass)/GRV (groove) Emphasizing sound control signal output to the TA2123AF (IC301) MB/GRV CTL “L”: normal/RV (revive)/GRV (groove), “H”: MB (mega bass)

  • Page 19: Exploded Views

    http://www.xiaoyu163.com SECTION 7 EXPLODED VIEWS 3 7 63 1515 0 NOTE: • Items marked “*” are not stocked since they • Abbreviation • -XX and -X mean standardized parts, so they may have some difference from the original are seldom required for routine service. Some AUS : Australian model one.
  • Page 20 http://www.xiaoyu163.com 3 7 63 1515 0 (2) MECHANISM DECK SECTION (MT-WMEX672-162) M601 PM901 L 13942296513 HP901 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark X-3376-293-1 HOLDER (F) ASSY (FX877) 3-029-287-01 SPRING (TG), TORSION X-3377-039-1 HOLDER (F) ASSY (/M) (FX673) 3-029-268-01 FLYWHEEL (R), INSERT (FX877) X-3377-363-1 PINCH LEVER (R) ASSY 3-029-268-11 FLYWHEEL (R), INSERT (FX673)

  • Page 21: Electrical Parts List

    http://www.xiaoyu163.com SECTION 8 MAIN 3 7 63 1515 0 ELECTRICAL PARTS LIST NOTE: • Due to standardization, replacements in the • Items marked “*” are not stocked since they The components identified by mark ! or dotted line with mark parts list may be different from the parts speci- are seldom required for routine service.
  • Page 22 http://www.xiaoyu163.com MAIN 3 7 63 1515 0 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C206 1-115-156-11 CERAMIC CHIP C207 1-113-619-11 CERAMIC CHIP 0.47uF 6.3V 8-719-422-37 DIODE MA8051-TX D101 8-719-422-37 DIODE MA8051-TX C208 1-115-467-11 CERAMIC CHIP 0.22uF D201 8-719-422-37 DIODE MA8051-TX...
  • Page 23 http://www.xiaoyu163.com MAIN 3 7 63 1515 0 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-216-833-11 RES,CHIP 1/16W L803 1-412-010-41 INDUCTOR CHIP 22uH 1-216-853-11 METAL CHIP 470K 1/16W < LIQUID CRYSTAL DISPLAY > 1-216-821-11 METAL CHIP 1/16W 1-216-849-11 METAL CHIP 220K...
  • Page 24 http://www.xiaoyu163.com MAIN 3 7 63 1515 0 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-218-831-11 RES,CHIP 0.5% 1/16W R803 1-216-817-11 METAL CHIP 1/16W 1-218-875-11 RES,CHIP 0.5% 1/16W R804 1-216-805-11 METAL CHIP 1/16W 1-218-839-11 RES,CHIP 0.5% 1/16W R805 1-216-819-11 METAL CHIP...
  • Page 25 WM-FX673/FX877 3 7 63 1515 0 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-528-543-11 BATTERY, NICKEL CADMIUM (NC-6WM) (FX673: E, EA, HK, AUS/FX877: CH) 1-528-543-22 BATTERY, NICKEL CADMIUM (NC-6WM) (FX673: AEP, UK. E, FR, EE, EA, HK, AUS/...

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