Sony tc wr 645 s service manual

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TC-WR6458

SERVICE MANUAL

US Mode/
Canadian Model
AEP Model

UK Model

E Model
Austral/an Model

Dolby noise reduction manufactured under license from

Model Name Using Similar Mechanism TC-WR63SS

93$[3$?°;:;°:Lf gum? figofaamare trademarks of Tape Transport Machanism DECK A TCM-190RA120L
Dolby Laboratories Licensing Corporation. Type DECK B TCM-190RB12C7
SPECIFICATIONS

Recording system 4-track Z-channei stereo Outputs

15:?de time 25%;: 90 sec (mm 5° 06° 35) Line outputs Rated Output level 0.5 V at a load impedance or

Signal-to-noise ratio (at peak level and weighted) (Ph°° PC) 47 k 0th

Cassene Type w Type H Type 1 Load impedance over 10 k ohms

(Dolby NR OFF) 58 dB 57 dB 55 d3 Headphones Output level 1 mw m a load impedance
(stereo phone jack) of 32 ohms

S/N ratio improvement (approximate values)

with Dolby B NR on: 5 dB at] kHz;10 dB at 5 kHz
with Dolby C NR 011115 dB at 500 Hz; 20 dB at 1 kHz
with Dolby S NR on: 10 dB at 100 HZ; 24 dB at 1 kHz

0.4 % (with Sony Type 1, 160 riwo/m, 315 Hz,
3rd H.D.)

1.8 % (with Sony Type IV, 250 nWb/m,
315 Hz, 3rd H.D.)

Frequency response (Dolby NR OFF)

Harmonic distortion

Type IV cassette 30 » 18,000 112(13 dB, IEC)
3U - 13,000 Hz [t3 dB (-4 dB) recording]
Type II cassette 30 - 17,000 Hz (13 dB, 50

Type I cassette 30 - 15,000 Hz (:3 dB, IEC)

Type 1v: Sony Type lv (METAL)
Type 11: sony Type 11 (HIGH)
Type 1: Sony Type I (NORMAL)

t 0.13 % W.Peak (IEC)
0.07 % WRMS (NAB)
$0.18 % W.Peak (DIN)

Wow and flutter

Inputs
Line inputs Sensitivity 0.16 V
(phone IaCks) input impedance 47 k ohms

General

Power requirements Us, Canadian model : 120v Ac, 60H:
AEP. German model : 220-230v AC, 50/60Hz

UK model : 240V AC, 5on

E model : 120, 220 or my AC adjustable, 50/60Hz
Australian model 2 240V AC, SO/éOHz

Power consumption 29 W

Dimensions Approx. 430 X113 x 290 mm (w/h/d)
(17 x 4 7/1 x 11 '/2 inches) including projecting
parts and controls

Mass Approx. 4.5 kg (9 lbs 15 oz)

Supplied accessories
Audio connecting cords (2)

Remote commander RM-j902 (Canadian model only)

Design and specifications subject to change without notice.

STEREO CASSETTE DECK
S ONE.

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TABLE OF CONTENTS

Section Title Page Section Title
Specifications ............................................................... 1 5_ DIAGRAMS
safety Check-out .......................................................... 3 54' Block Diagram ..........
5-2. Circuit Board Location
1. GENERAL 53. Printed Wiring Boards (Main Section)-
l-I. Identifying the Parts ------------------------------------------- 4 5-4. Schematic Diagram (Main Section)

. DISASSEMBLY

Z-L Front Panel ~~~~~~~~~
Z-ZI Mechanism Deck ~~~~~
2-3. Capstan Motor, Reel Motor ~
2-4. Headr Pinch Roller -----------

. ADJUSTMENTS

3-1. Mechanical Adjustments--
3-2. Electrical Adjustments

4. EXPLANATION OF IC TERMINALS ~~~~~~~~~~~~~~~~~~~~~~ 11

MODEL IDENTIFICATION
(Specification Label)

5-5. Schematic Diagram (Audio Section)-
5-6, Printed Wiring Boards (Dolby (S) Section)-
5-7. Schematic Diagram (Dolby (S) Section) -------

6. EXPLODED VIEWS
6-1. Chassis Section ~~~~~~~~~~~~~~~~~~~~~
6-2. Front Panel Section
6-3. Mechanism Section 1--

6-4. Mechanism Section 2 ...................................

7. ELECTRICAL PARTS LIST ~

SONYo

MODEL N0, TC-WRG45S

STEREO CASSETTE DECK

US, Canadian model :
UK model :

Australian model :
AEP, German model :
E model :

AC 120V 60HZ

AC 240V 50HZ

AC 240V~50/60HZ

AC 220-230V~50/60HZ
AC120, 220, 240V~50/60HZ

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