Sony WE475 Service Manual
Sony WE475 - TC Dual Cassette Deck Manual
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UPC - 027242584419
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Sony WE475 manual content summary:
- Sony WE475 | Service Manual - Page 1
of 47 kilohms, load impedance over 10 kilohms Headphones (stereo phone jack) output level 0.25 mW at a load impedance of 32 ohms - Continued on next page - STEREO CASSETTE DECK 9-873-893-11 2001D0900-1 © 2001. 4 Sony Corporation Home Audio Company Shinagawa Tec Service Manual Production Group - Sony WE475 | Service Manual - Page 2
TC-WE475 Control A1II cable (1)* *Supplied for Canadian models only Design and specifications are subject to change without notice. SAFETY CHECK-OUT After correcting the original service problem WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. - Sony WE475 | Service Manual - Page 3
TC-WE475 TABLE OF CONTENTS 1. GENERAL 4 2. DISASSEMBLY 2-1. Case 5 2-2. Front Panel Assy 5 2-3. Cassette Lid Assy (Deck A/B 6 2-4. Mechanism Deck Assy (Deck A/B 6 3. SERVICE Chassis Section 28 7-3. Cassette Holder Section 29 7-4. Front Panel Section 30 7-5. Tape Mechanism Section 31 8. - Sony WE475 | Service Manual - Page 4
TC-WE475 Front Panel 1 ea e; wl SECTION 1 GENERAL 23 45 wj wg wd wa ql qj qg qd wk wh wf ws w; qk qh qf qs 67 8 9 0 qa Location of Parts and Controls 1 POWER button 2 RESET (Deck A) button 3 MEMORY (Deck A) button 4 RESET (Deck B) button 5 MEMORY (Deck B) button 6 AUTO REC LEVEL indicator 7 - Sony WE475 | Service Manual - Page 5
the following procedure. Set Case Front Panel Assy Cassette Lid Assy (Deck A/B) Note : Follow the disassembly procedure in the numerical order given. 2-1. CASE 3 two screws (case 3 TP2) 4 case TC-WE475 Mechanism Deck Assy (Deck A/B) 1 screw (BVTT 3x6) 2 two screws (case 3 TP2) 2-2. FRONT - Sony WE475 | Service Manual - Page 6
TC-WE475 2-3. CASSETTE LID ASSY (DECK A/B) 1 Push the EJECT button. 2 four claws 2-4. MECHANISM DECK ASSY (DECK A/B) 3 cassette lid assy 3 mechanism deck assy 1 two screws (BVTP 2.6x8) 2 two screws (BVTP 2.6x8) 6 - Sony WE475 | Service Manual - Page 7
SECTION 3 SERVICE MODE TC-WE475 KEY CHECK & DISPLAY CHECK MODE While pressing the h (A deck) and REC MUTING W buttons /NOMAL m (AMS) (AMS) M x h H PAUSE X REC MUTING W REC z FADER ARL SYNCHRO DOLBY NR switch OFF B C B deck side Display 0 1 2 3 4 Segment check display (*2) 5 6 7 8 9 A b All lit - Sony WE475 | Service Manual - Page 8
TC-WE475 SECTION 4 MECHANICAL ADJUSTMENTS PRECAUTION 1. Clean the following parts with a denatured alcohol-moistened swab : record/playback/erase head pinch roller rubber belts capstan idlers 2. Demagnetize the record/playback head with a head demagne- tizer. 3. Do not use a magnetized - Sony WE475 | Service Manual - Page 9
TC-WE475 Record/Playback Head Azimuth Adjustment DECK A Procedure: 1. Forward Playback Mode DECK B test tape P-4-A100 (10 kHz, -10 dB) level meter 47 kΩ set LINE OUT 2. Turn the adjustment screw for the maximum output levels. If these levels do not - Sony WE475 | Service Manual - Page 10
TC-WE475 Bias Consumption Current Adjustment DECK B This adjustment should be performed when replacing the head assy or the bias oscillator transformer (T141, T241). Setting: REC LEVEL knob : standard recording position (See page 11.) Procedure: blank tape CS-413 digital voltmeter set LINE - Sony WE475 | Service Manual - Page 11
: main board [MAIN board] (Component side) TC-WE475 RV111 RV211 PB LEVEL PB LEVEL DECK A (L) DECK A (R) 100 1 81 80 IC801 30 31 51 50 RV318 PITCH CONTROL (DECK A) RV317 NORMAL SPEED (DECK A) RV316 HIGH SPEED (DECK A) RV417 NORMAL SPEED (DECK B) RV101 REC LEVEL (L) RV121 PB LEVEL - Sony WE475 | Service Manual - Page 12
TC-WE475 6-1. CIRCUIT BOARDS LOCATION LEAF SW (REC/PB) board (Deck A) POWER board (v F) SECTION 6 DIAGRAMS TRANS (A) board (v E) (Except SP) TRANS (B) board (v B) MAIN board DIRECTION board (v C) HEAD RELAY(PB) board (Deck A) PANEL board (v A) RECVOL board (v G) LEAF SW (REC/PB) board (Deck B) - Sony WE475 | Service Manual - Page 13
tion tolerances. • Circled numbers refer to waveforms. • Signal path. d : PB G : REC (DECK B) • Abbreviation CND : Canadian model. AUS : Australian model. SP : Singapore model. For printed wiring are omitted WAVEFORMS - MAIN SECTION (3/4) - 1 4.4Vp-p 10MHz IC801 el EXTAL 13 13 TC-WE475 - Sony WE475 | Service Manual - Page 14
TC-WE475 • Semiconductor Location Ref. No. Location D306 D307 D318 D451 D601 D701 D702 D703 D704 D705 D706 D707 D708 D709 D710 D711 D712 D713 D714 D715 - Sony WE475 | Service Manual - Page 15
6-3. SCHEMATIC DIAGRAM - MAIN (1/4) SECTION - (Page 22) TC-WE475 (Page 17) (Page 19) (Page 16) 15 15 (Page 17) - Sony WE475 | Service Manual - Page 16
TC-WE475 6-4. SCHEMATIC DIAGRAM - MAIN (2/4) SECTION - • See page 14 for Printed Wiring Board. (Page 22) (Page 15) (Page 17) (Page 17) (Page 17) (Page 18) (Page 18) (Page 19) 16 16 (Page 18) - Sony WE475 | Service Manual - Page 17
13 for Waveforms. • See page 14 for Printed Wiring Board. • See page 26 for IC Pin Functions. (Page 22) (Page 22) (Page 15) (Page 20) TC-WE475 (Page 15) (Page 24) (Page 16) (Page 16) (Page 16) (Page 18) (Page 18) 17 17 (Page 18) - Sony WE475 | Service Manual - Page 18
TC-WE475 6-6. SCHEMATIC DIAGRAM - MAIN (4/4) SECTION - (Page 17) (Page 16) (Page 16) (Page 17) (Page 17) (Page 22) (Page 16) 18 18 - Sony WE475 | Service Manual - Page 19
TO MAIN BOARD 6-9. PRINTED WIRING BOARD - DECK B SECTION - • See page 12 for Circuit Boards Location. TC-WE475 (Page 14) TO MAIN BOARD * PLUNGER SOLENOID is supplied as the Mechanism Deck (TCM-230ASR41A : A-2100-941-A). 6-8. SCHEMATIC DIAGRAM - DECK A SECTION - * PLUNGER SOLENOID is supplied as - Sony WE475 | Service Manual - Page 20
TC-WE475 6-11. SCHEMATIC DIAGRAM - DISPLAY SECTION - 20 20 (Page 17) - Sony WE475 | Service Manual - Page 21
6-12. PRINTED WIRING BOARD - DISPLAY SECTION - • See page 12 for Circuit Boards Location. (Page 14) TC-WE475 21 21 • Semiconductor Location Ref. No. Location D904 B-3 D905 B-2 D906 B-2 D907 B-2 D908 B-2 IC901 B-5 IC902 A-2 Q901 A-2 - Sony WE475 | Service Manual - Page 22
TC-WE475 6-13. SCHEMATIC DIAGRAM - PANEL SECTION - (Page 17) (Page 18) (Page 17) TO MAIN BOARD (Page 15) TO MAIN BOARD (Page 16) 22 22 - Sony WE475 | Service Manual - Page 23
6-14. PRINTED WIRING BOARD - PANEL SECTION - • See page 12 for Circuit Boards Location. (Page 14) (Page 14) 1 2 3 4 A B (Page 14) (Page 14) 23 23 TC-WE475 (Page 14) - Sony WE475 | Service Manual - Page 24
TC-WE475 6-15. SCHEMATIC DIAGRAM - POWER SECTION - (Page 17) 24 24 - Sony WE475 | Service Manual - Page 25
6-16. PRINTED WIRING BOARD - POWER SECTION - • See page 12 for Circuit Boards Location. TC-WE475 (Page 14) 25 25 - Sony WE475 | Service Manual - Page 26
output I FL CLK control input I Display control input O Display control output I Sircs signal input - Not used O Record /playback dolby NR mode selector output "L" : Playback - Not used O Recording mute output (DECK B) - Not used O Dolby selector "H ": C,"Open": B, "L": Dolby off O REC EQ - Sony WE475 | Service Manual - Page 27
marked "*" are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items. • Canadian model SP : Singapore model AUS : Australian model 7-1. CASE SECTION TC-WE475 The components identified by mark 0 or dotted line with mark 0 are - Sony WE475 | Service Manual - Page 28
TC-WE475 7-2. CHASSIS SECTION US, CND 53 v E v B UK 56 53 AUS 53 AUEPS, SP T901 58 55 not supplied 55 53 51 not supplied 52 #2 57 54 #1 #2 #2 #1 - Sony WE475 | Service Manual - Page 29
SECTION TC-WE475 #4 #3 104 114 105 114 TCM-230ASR41A 114 106 115 111 108 112 107 113 #3 105 103 112 #3 114 114 TCM-230ASR41B 114 104 115 #4 108 #3 101 109 110 102 Ref. No. 101 101 102 102 103 103 104 105 106 Part No. Description Remark X-4953-501-1 LID(A) ASSY, CASSETTE - Sony WE475 | Service Manual - Page 30
TC-WE475 7-4. FRONT PANEL SECTION • vA to vG are including into the mounted PANEL board (Ref No. 160). vA PANEL board vC DIRECTION board vD H.P board vF - Sony WE475 | Service Manual - Page 31
TC-WE475 7-5. TAPE MECHANISM SECTION (DECK A: TCM-230ASR41A) (DECK B: TCM-230ASR41B) 202 (DECK A) 215 217 216 not supplied 207 204 209 not supplied 205 203 not supplied 206 217 214 211 213 212 not supplied 215 216 217 - Sony WE475 | Service Manual - Page 32
TC-WE475 HEAD RELAY (PB) HEAD RELAY (REC/PB) SECTION 8 ELECTRICAL PARTS LIST LEAF SW from the original one. • Items marked "*" are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items. • RESISTORS All resistors are in ohms METAL - Sony WE475 | Service Manual - Page 33
C322 C417 C421 C422 C431 1-104-664-11 1-126-959-11 1-104-664-11 1-104-664-11 1-104-664-11 ELECT ELECT ELECT ELECT ELECT TC-WE475 MAIN Remark 4.7uF 20.00% 50V 2.2uF 20.00% 50V 0.0039uF 5.00% 50V 390PF 0.001uF 100PF 0.022uF 4.7uF 10.00% 50V 10% 50V 10% 50V - Sony WE475 | Service Manual - Page 34
TC-WE475 MAIN Ref. No. D702 D703 D704 D705 Part No. Description 8-719-024-99 8-719-024-99 8-719-024-99 8-719-911-19 DIODE DIODE DIODE - Sony WE475 | Service Manual - Page 35
1K 2.2K 27K 12K 150K 10 33K 15K 47K 47K 560 47K 1.5K 22K 22K 47K 1.5K 1.5K 47K 27K 22K 5.6K 75K 4.7K TC-WE475 MAIN Remark Ref. No. Part No. Description Remark 5% 1/4W 5% 1/4W 5% 1/4W 5% 1/4W 5% 1/4W 5% 1/4W 5% 1/4W 5% 1/4W 5% 1/4W 5% 1/4W 5% 1/4W F 5% 1/4W 5% 1/4W 5% 1/4W F 5% 1/4W F 5% 1/4W - Sony WE475 | Service Manual - Page 36
TC-WE475 MAIN PANEL Ref. No. R709 R710 R711 Part No. Description 1-249-425-11 CARBON 1-249-417-11 CARBON 1-249-427-11 CARBON R712 R713 R714 - Sony WE475 | Service Manual - Page 37
TC-WE475 DECK )(J (AMS)) SWITCH, KEYBOARD (RESET A) ACCESSORIES & PACKING MATERIALS 1-776-263-51 CORD, CONNECTION 1-777-241-11 CORD, CONNECTION CONTROL A1II (CABLE) (CND) 4-232-596-11 MANUAL, INSTRUCTION (ENGLISH) 4-232-596-21 MANUAL, INSTRUCTION SYNCHRO) SWITCH, SLIDE (DOLBY NR) The components - Sony WE475 | Service Manual - Page 38
TC-WE475 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 1.0 2001.04 New Description of Revision 38
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Model Name Using Similar Mechanism
TC-WE435
DECK A
TCM-230ASR41A
DECK B
TCM-230ASR41B
US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
STEREO CASSETTE DECK
SPECIFICATIONS
Dolby noise reduction extension manufactured under license
from Dolby Laboratories Licensing Corporation.
HX Pro originated by Bang & Olufsen. “DOLBY”, the double-D
symbol
;
and “HX PRO” are trademarks of Dolby Laboratories
Licensing Corporation.
TC-WE475
— Continued on next page —
Transport Mechanism Type
Ver 1.0
2001.04
Sony Corporation
Home Audio Company
Shinagawa Tec Service Manual Production Group
9-873-893-11
2001D0900-1
© 2001. 4
SERVICE MANUAL
System
Fast-winding time
Approx.100 sec. (with Sony C-60 cassette)
Signal-to-noise ratio (at peak level and weighted with Dolby
NR off)
55 dB, using Sony TYPE I cassette
57 dB, using Sony TYPE II cassette
58 dB, using Sony TYPE IV cassette
S/N ratio improvement
With Dolby B NR on:
Approx. 5 dB at 1 kHz, 10 dB at 5 kHz
With Dolby C NR on:
Approx. 15 dB at 500 Hz, 20 dB at 1 kHz
Harmonic distortion
0.4% (using Sony TYPE Icassette):
160 nWb/m 315 Hz, 3rd H.D.)
1.8% (using Sony TYPE IV cassette):
250 nWb/m 315 Hz, 3rd H.D.)
Frequency response (DOLBY NR OFF)
30-16,000 Hz (±3 dB, IEC), 20-17,000 Hz
(±6 dB), using Sony TYPE I cassette
30-17,000 Hz (±3 dB, IEC), 20-18,000 Hz
(±6 dB), using Sony TYPE II cassette
30-19,000 Hz (±3 dB, IEC), 20-20,000 Hz
(±6 dB), 30-13,000 Hz (±3 dB, –4dB recording),
using Sony TYPE IV cassette
Wow and flutter
±0.15% W. Peak (IEC)
0.1% W. RMS (NAB)
±0.2% W. Peak (DIN)
Variable pitch range
Approx. –30 to +30 %
Inputs
Line inputs (phono jacks)
sensitivity 0.16 V, input impedance 47 kilohms
Outputs
Line outputs (phono jacks)
rated output level 0.5 V at a load impedance of
47 kilohms, load impedance over 10 kilohms
Headphones (stereo phone jack)
output level 0.25 mW at a load impedance of
32 ohms