Sony TC-WR545 Service Manual

SERVICE MANUAL
Photo : TC-WR545
TC-WR45/WR741
US Model
Canadian Model
TC-WR545/WR74 1
AEP Model
UK Model
E Model
Australian Model
TC-WR545
Model Name Using Similar Mechanism | TC-WR535
Tape Transport Machanism
Type
DECK A} TCM-190RA12CL
TCM-WR545 : TCM-190RB12CL
DECK B
TCM-WR741 : TCM-190RB52C
SPECIFICATIONS
4-track 2-channel stereo
Approx. 90 sec. (with Sony C-60
cassette)
Bias | AC bias
Signal-to-noise ratio (at peak level and weighted)
Cassette Type IV Type Il Type I
(Dolby NR
OFF) 58 dB 57 dB 55 dB
S/N ratio improved (approximate values)
with Dolby B NR on: 5 dB at 1 kHz; 10 dB at 5 kHz
with Dolby C NR on: 15 dB at 500 Hz; 20 dB at 1 kHz
Recording system
Fast winding time
Harmonic distortion
0.4% (with Sony Type I, 160 nWb/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)
Type IV Type I Type lI
cassette cassette cassette
30 - 18,000 Hz }30- 17,000 Hz | 30 - 15,000 Hz
(43 dB, TEC) {G@3dB,IEC) | (43 dB, IEC)
30 - 13,000 Hz
[+3 dB (-4 dB)
recording]
Type IV: Sony Type IV (METAL)
Type Il: Sony Type IJ (HIGH)
Typel: Sony Type I (NORMAL)
Wow and flutter +0.14% W.Peak (IEC)
0.08% W.RMS (NAB)
+0.19% W.Peak (DIN)
— Continued on page 2 —
Dolby noise reduction manufactured under license from
Dolby Laboratories Licensing Corporation.
“DOLBY” and the double-D symbol 90 are trademarks of
Dolby Laboratories Licensing Corporation.
STEREO CASSETTE DECK
SONY.

Sony TC-WR545 Specifications

General

Track System	4-track, 2-channel stereo
Tape Speed	4.8 cm/s
Heads	1 x record/playback, 1 x playback, 1 x erase
Signal-to-Noise Ratio (Normal Tape)	58dB
Signal-to-Noise Ratio (Chrome Tape)	60dB
Signal-to-Noise Ratio (Metal Tape)	62dB
Power Supply	AC 120V, 60Hz
Dimensions	430 x 125 x 290mm
Weight	5.5kg
Type	Double Cassette Deck
Motor	DC servo
Frequency Response (Normal Tape)	30 Hz - 14 kHz
Frequency Response (Chrome Tape)	30 - 16000 Hz
Frequency Response (Metal Tape)	30 Hz - 17 kHz
Wow and Flutter	0.08% WRMS
Outputs	Line Out, Headphone

Summary

Specifications

Safety Check-out

Leakage Test

Procedures for testing AC leakage from exposed metal parts.

Identifying the Parts on the Front Panel

Disassembly Procedures

Front Panel Disassembly

Procedure for removing the front panel.

Mechanism Deck Disassembly

Procedure for removing the mechanism deck.

Capstan Motor and Reel Motor Disassembly

Steps for disassembling capstan and reel motors.

Head and Pinch Roller Disassembly

Steps for disassembling heads and pinch rollers.

Adjustment Procedures

Mechanical Adjustments

Procedures for mechanical adjustments.

Electrical Adjustments

Procedures for electrical adjustments.

Explanation of IC Terminals

Diagrams and Layouts

Block Diagram

Overall system block diagram.

Circuit Board Location

Diagrams indicating circuit board locations.

Printed Wiring Boards (System Control)

Printed wiring board layout for system control.

Schematic Diagram (System Control)

Schematic diagram for system control.

Schematic Diagram (Audio Section)

Schematic diagram for audio section.

Printed Wiring Boards (Audio Section)

Printed wiring board layout for audio section.

Exploded Views

Chassis Section

Exploded view of the chassis and its components.

Front Panel Section

Exploded view of the front panel and its parts.

Electrical Parts List