Sony tc wr 661 service manual

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TC-WE405/WR35llZ/WRBBI

SERVICE MANUAL us Model

Canadian Model

TC- WE405/WHSSOZ/WR66 1

AEP Model
UK Model
E Model

TC- WE405/WFl661
Australian Model
Chinese Model

TC-WE405
Photo :TC-WE405

Dolby noise reduction and HX Pro headroom extension TC-WE405
manufactured under license from Dolby Laboratories Licensing . 4 ,
Corporation. HX Pro originated by Bang & Olufsen. M°d9' Name USMQ Similar Mechanism TCWR445

T rt M h ' DE K-A
DOLBY, the double-D symbol an and HX PRO" are trademarks ape Trans 9° my C TCMQQOWM
of Dolby Laboratories Licensing Corporation. Type DECK_B

TC-WR3502/WR661
Model Name Using Similar Mechanism NEW

Tape Transport Mechanism DECK-A

TCM-220WR4E

Type DECK-B
SPECIFICATIONS
System
Recording system Frequency response (Dolby NR 0)
4-track Z-channel stereo Type I tape, Sony Type I (NORMAL): 30 - 16,000 Hz
(:3 dB, IEC)
Fast-winding time (approx.) Type II tape, Sony Type II (HIGH): 30 - 17,000 Hz
180 sec, (with Sony C-60 cassette) (:3 dB IEC)
. Type lV tape, Sony Type lV (METAL): 30 - 19,000 Hz
Bias (:3 dB, IEC)
AC bias 30 - 13,000 Hz (:3 dB, -4 dB recording)
Type I tape, Sony Type I (NORMAL): 20 - 17,000 Hz
Signal-to~noise ratio (at peak level and weighted with Dolby NR off) (16 d5)
Type I tape, Sony Type I (NORMAL): 55 dB Type ll tape, Sony Type ll (HIGH): 20 - 18,000 Hz
Type n tape, Sony Typell (HlCH): 57 dB (2665)
Type lV tape, Sony Type IV (METAL): 53 as Type IV tape 501w Type 1V (MEAL): 2° - 20900 Hz
(:6 dB)
SIN ratio improvement (approximate values) Wow and flutter
With Dolby B NR on: 5 dB at] kHz,10 dB at 5 kHz 20.15% W. Peak (lEC)
With Dolby C NR on: 15dB at 500 Hz. 20 dB at] kHz 0.! % W. RMS (NAB)
Harmonic distortion 102% W. Peak (DIN)

-- Continued on ne t -
0.4% (with Type I tape, Sony Type I (NORMAL): x page

fin STEREO CASSETTE DECK
S 0 NY;

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Inputs

Line inputs (phono jacks)
Sensitivity: 0.16 V
Input impedance: 47 kilohms

Outputs

line outputs (phono jacks)
Rated oulpul level : 0.5 V at a load impedance of
47 kilohms
Load impedance: Over 10 kilolims

Headphones (stereo phone jack) (iC-WEMJS only)
Output level: 0.25 MW at a load impedanceof

32 oh ms
General
Power requirements
Where purchased Power requirements
US, Canadian model 120 V AC. 60 Hz

AEP. UK. German, Italian.

. , _ 220 - 230 V AC. 50/60 Hz
Singapore. Malaysia. Chinese model

Australian model 240 V AC. 50/60 Hz

E model 120/220/240 V AC. 50/60 Hz

SAFETY CHECK-OUT

After correcting the original service problem, perform
the following safety checks before releasing the set to the
customer:

Check the antenna terminals, metal trim, metallized
knobs, screws, and all other exposed metal parts for AC
leakage. Check leakage as described below.

LEAKAGE

The AC leakage from any exposed metal part to earth
ground and from all exposed metal parts to any exposed
metal part having a return to chassis, must not exceed 0.5
mA (500 microampers). Leakage current can be measured
by any one of three methods.

1. A commercial leakage tester, such as the Simpson 229
or RCA WT-540A. Follow the manufacturers
instructions to use these instruments.

2. A battery-operated AC milliammeter. The Data
Precision 245 digital multimeter is suitable for this job.

3. Measuring the voltage drop across a resistor by means
of a VOM or battery-operated AC voltmeter. The
limit indication is 0.75 V, so analog meters must
have an accurate low-voltage scale The Simpson 250
and Sanwa SH-63Trd are examples of a passive VOM
that is suitable, Nearly all battery operated digital
multimeters that have at 2V AC range are suitable. (See
Fig. A)

Power consumption
18 W

Dimensions (approx) (w/ltld)
430 x 120 x 305 mm (w/h/d)
(17 x 4 3/. x12/r inches)
including projecting parts and controls

Mass (approx)
38 kg (8 lbs 7 oz)

Supplied accessories
Audio connecting cords (2 phone plugs - 2 phono
plugs) (2)

Optional accessory
Remote commander RM-l910

Design and specifications are subject to change without
notice.

To Exposed Metal
Parts on Set

/AC

015: g 1 '5) voltmeter
- (0.75V)

1-- Earth Ground

Fig. A. Using an AC voltmeter to check AC leakage.

SAFETY-RELATED COMPONENT WARNING I!

COMPONENTS IDENTIFIED BY MARK A OR DOTTED
LINE WITH MARK A ON THE SCHEMATIC DIAGRAMS
AND IN THE PARTS LIST ARE CRITICAL TO SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONV PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY.

ATTENTION AU COMPOSANT AYANT RAPPORT
A LA sEcuanEu
LES COMPOSANTS IDENTIFIES PAR UNE MAROUE A
sun LES DIAGRAMMES scNEMATIOUEs ET LA LISTE
DES PIECES SONT CRITIQUES POUR LA SECURITE'
DE FONCTIONNEMENT. NE REMPLACER CES
cOMPOSANTs QUE PAR DES PtEcEs SONY DONT
LES NUMEROS SONT DONNEs DANS CE MANUEL OU
DANS LES SUPPLEMENTS PUBLIES PAR SONY.

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