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

Sony WM-FX673 Service Manual

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SERVICE MANUAL
Ver 1.1 2001.01
• WM-FX675 is almost the same as WM-FX673.
Difference portion and difference parts list from WM-FX673 are described
in this service manual.
Please refer to WM-FX673/FX877 service manual (9-926-973-
ously issued for other information.
!
: Changed portion.
Page
Model Name Using Similar Mechanism WM-EX670/EX672
1
Tape Transport Mechanism Type
• EXPLODED VIEWS
• Color Indication of Appearance Parts
Example:
KNOB, BALANCE (WHITE) . . . (RED)
↑
Parts Color Cabinet's Color
Page
Ref. No. Part No.
1
3-704-197-23 SCREW (M1.4X2.5), LOCKING
3
3-034-068-21 LID, BATTERY (FX673/FX877: CH, KR)
32
5
A-3021-222-A MAIN BOARD, COMPLETE
5
A-3021-223-A MAIN BOARD, COMPLETE (FX673: FR)
7
3-029-210-01 TERMINAL BOARD (MINUS)
11
3-366-892-11 SCREW (M1.4X1.4)
12
3-029-217-01 LEVER (B), LOCK
WM-FX673
MT-WMEX672-162
• Abbreviation
AUS : Australian model
CH : Chinese model
↑
CND : Canadian model
EA : Saudi Arabia model
EE
: East European model
WM-FX673
Description
(EXCEPT FX673: FR/FX877: JE)
WM-FX675
Model Name Using Similar Mechanism WM-FX673/FX877
Tape Transport Mechanism Type
Remark
Ref. No. Part No.
1
3-704-197-21 SCREW (M1.4X2.5), LOCKING
1
3-704-197-23 SCREW (M1.4X2.5), LOCKING
3
3-034-068-31 LID, BATTERY (BLUE) (AEP, E, CH)
3
3-034-068-41 LID, BATTERY (GOLD) (E, AUS, CH)
5
A-3021-222-A MAIN BOARD, COMPLETE (EXCEPT FR)
5
A-3021-223-A MAIN BOARD, COMPLETE (FR)
7
3-038-056-01 TERMINAL BOARD (MINUS)
11
3-939-590-05 SCREW (IB LOCK)
12
3-038-054-01 LEVER (B), LOCK
AEP Model
E Model
Australian Model
Chinese Model
) previ-
[][]
WM-FX675
MF-WMFX671-162
FR
: French model
HK : Hong Kong model
JE
: Tourist model
KR : Korean model
WM-FX675
Description
(SILVER)...(GOLD)
(BLACK)...(BLUE)
– Continued on next page –
$
$
Remark

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Summary of Contents for Sony WM-FX673

  • Page 1 E Model Ver 1.1 2001.01 Australian Model Chinese Model • WM-FX675 is almost the same as WM-FX673. Difference portion and difference parts list from WM-FX673 are described in this service manual. Please refer to WM-FX673/FX877 service manual (9-926-973- ) previ- [][] ously issued for other information.
  • Page 2 WM-FX675 Page WM-FX673 WM-FX675 3-328-483-11 SHEET 3-366-892-01 SCREW (M1.4) 3-389-523-02 SCREW (IB LOCK) X-3376-277-2 BRACKET ASSY X-3377-717-1 BRACKET ASSY 3-704-197-13 SCREW (M1.4X2.0), LOCKING 3-704-197-11 SCREW (M1.4X2.0), LOCKING (SILVER)...(GOLD) 3-704-197-13 SCREW (M1.4X2.0), LOCKING (BLACK)...(BLUE) X-3377-734-1 LID ASSY (F-S), CASSETTE X-3380-295-1 LID ASSY (FX675ML), CASSETTE (BLUE)
  • Page 3 WM-FX675 Page WM-FX673 WM-FX675 (2) MECHANISM DECK SECTION (2) MECHANISM DECK SECTION (MT-WMEX672-162) (MF-WMFX671-162) X-3377-039-1 HOLDER (F) ASSY (/M) (FX673) X-3377-038-1 HOLDER (F) ASSY 3-029-271-01 SPRING (HD) 3-046-789-01 SPRING (HDA) 3-029-280-01 BELT (F2) 3-388-079-01 BELT (F2) 3-029-287-01 SPRING (TG), TORSION...
  • Page 4 WM-FX675 Page WM-FX673 WM-FX675 1-528-543-11 BATTERY, NICKEL CADMIUM (NC-6WM) 1-528-299-41 BATTERY, NICKEL CADMIUM (NC-6WM) (FX673: E, EA, HK, AUS/FX877: CH) (AEP) 1-528-543-22 BATTERY, NICKEL CADMIUM (NC-6WM) 1-528-543-11 BATTERY, NICKEL CADMIUM (NC-6WM) (FX673: AEP, UK. E, FR, EE, EA, HK, AUS...

  • Page 5: Revision History

    WM-FX675 REVISION HISTORY Clicking the version allows you to jump to the revised page. Also, clicking the version at the upper right on the revised page allows you to jump to the next revised page. Ver. Date Description of Revision 2001.01 Addition of Destination New (WM-FX675 (AEP/E/Australian/Chinese))

  • Page 6: Radio Cassette Player

    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 7: 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 8: Servicing Notes

    SECTION 1 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 9 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 clutch assy (F) gear (Y)

  • Page 10: General

    SECTION 2 This section is extracted from instruction manual. GENERAL (FX673) (FX877) (FX673) (FX877) – 5 –...
  • Page 11 (FX877) (FX673) (FX877) (FX673) (FX673) (FX877) – 6 –...

  • Page 12: Case Block Assy

    SECTION 3 DISASSEMBLY 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 Cassette Note: Follow the disassembly procedure in the numerical order given.

  • Page 13: Main Board

    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. slider BELT (F2) 2 terminal board (T3)
  • Page 14 MOTOR (CAPSTAN/REEL) (M601) 1 two screws (M1.4) 2 motor (capstan/reel) (M601) 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. 4 shaft – 9 –...

  • Page 15: Ornament Block Assy, Reel

    ORNAMENT BLOCK ASSY, REEL 4 claw 5 ormanent block assy, reel 4 claw 3 boss 1 claw 1 claw 2 claw HOLDER (F) ASSY 2 shaft 7 bracket (cassette) assy 5 lever (S), lock 3 lever (B), lock 1 two screws (M1.4 ×...

  • Page 16: Pinch Lever (N)/(R) Assy

    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 HEAD, MAGNETIC (PLAY BACK) (HP901) 1 claw 2 Remove the magnetic head (HP901) in the direction of the arrow.

  • Page 17: Mechanical Adjustments

    SECTION 4 SECTION 5 MECHANICAL ADJUSTMENTS ELECTRICAL ADJUSTMENTS 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 SOUND RV/MB/GRV : OFF 2.

  • Page 18: Tuner Section

    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 19: 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 21: Schematic Diagram

    WM-FX673/FX877 6-4. SCHEMATIC DIAGRAM • • See page 27 for Waveform. See page 28 for IC Block Diagrams. – 23 – – 24 – – 25 – – 26 –...
  • Page 22 • 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 1 to 4...
  • Page 23 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) Power on/off control signal output to the TA2123AF (IC301)

  • Page 24: Case Section

    SECTION 7 EXPLODED VIEWS NOTE: • Abbreviation • -XX and -X mean standardized parts, so they • Items marked “*” are not stocked since they may have some difference from the original are seldom required for routine service. Some AUS : Australian model one.
  • Page 25 (2) MECHANISM DECK SECTION (MT-WMEX672-162) M601 PM901 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) 3-029-271-01 SPRING (HD)

  • Page 26: Electrical Parts List

    SECTION 8 MAIN 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 are seldom required for routine service. parts list may be different from the parts speci- ! are critical for safety.
  • Page 27 MAIN 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 C210 1-164-677-11 CERAMIC CHIP 0.033uF D301...
  • Page 28 MAIN 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 1/16W 1-803-469-11 DISPLAY PANEL, LIQUID CRYSTAL 1-216-829-11 METAL CHIP 4.7K...
  • Page 29 MAIN 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 1/16W 1-218-875-11 RES,CHIP 0.5% 1/16W...
  • Page 30 WM-FX673/FX877 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/ FX877) 1-528-580-21 BATTERY CHARGER (BC-7HT) (FX877: JE)

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