Sony tc w 230 service manual
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Extracted text from sony tc w 230 service manual (Ocr-read)
Page 1
TC-W230 .
US Model
Canadian Model
AEP Model
LTIII|III
Dolby and the double-D symbol are the trade marks of
Dolby laboratories Licensing Corporation, Noise reduction
system manufactured under license from Dolby Laboratories
Licensing Corporation,
SPECIFICATIONS
Recording system 4-track 2«channel stereo
Fast-forward and rewind time
Approx. 105 sec. (with HF60 cassette)
Bias frequency 105 kHz
Signal-to-noise ratio (NAB, at peak level)
Cassene Why stmh OFF BTYPE ON CTYPE 0N
TYPE iv (Sony METAL-ES) 53 as 65 as 71 as
TYPE |l (Sony ucx-S) 56 dB 63 as 69 dB
TYPE | (Sony HF-S) 54 dB 51:15 67 dB
Total harmonic distortion
1.0% (with Sony METAL-ES cassettes)
SAFETY-RELATED COMPONENT WARNING
COMPONENTS IDENTIFIED BY SHADING AND MARK
A ON THE SCHEMATIC DIAGRAMS AND IN THE
PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS
WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS
MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT
A LA sEcURITEI
LEs COMPOSANTS IDENTIFIES PAR UNE TRAME ET
UNE MARouE A SUR LES DIAGRAMMES scHE-
MATIoUEs ET LA LISTE DES PIECES SONTCRITioUEs
POUR LA SECURITE DE FONCTIONNEMENT. NE REM-
PLACER CES COMPOSANTS QUE PAR DES PIECES
SONY DONT LEs NUMEROS SONT DONNES DANS CE
MANUEL ou DANs LEs SUPPLEMENTS PUBLIEs PAR
SONV.
gill?
UK Model
E Model
TC-W233 :
US Model
TC-W235 :
E Model
Tape Transport
Mechanism Type DECK B
DECK A TCM-54FMF
TCM-53FMF
Frequency response
Wow and flutter
Inputs
Outputs
OdB- .775V
DOLBY NR OFF
. With TYPE rIV cassette (Sony METAL-ES)
30-15000 Hz (1 3 dB)
30-13900 HZ ( r 3 dB, 0 VU recording)
30- 15,000 Hz (DIN)
. With TYPE [I cassette (Sony UCX-S)
3044,0130 Hz ( x 3 dB)
(SO-14,000 Hz (DIN)
0 With TYPE I cassette (Sony HF-S)
30713900 Hz (i 3 dB)
30-13000 Hz (DIN)
012% WRMS (NAB)
: 018% (EC)
Line inputs (phono jacks)
Sensitivity 775 mV (- 20 dB)
input impedance 47 kilohrns
Line outputs (phono jacks)
Output level 0.44 V (- 5 dB) at load
impedance 47 kilohms
Load impedance over 10 kilohms
Headphone output (stereo phone jack)
Output level w 28 dB at a load impedance of
8 ohms
- Continued on page 2 -
STEREl] CASSETTE DECK
ONY,
fl-
Page 2
rc-w230/w233/w235 l
General
Power requirements
US, Canadian model: 120 V ac, 50 H2
AEP model: 220 V ac, 50 Hz
(240 V ac adiustable by authorized Sony
personnell
UK model: 240 V ac, 50 Hz
(220 V an adjustable by aurhorized Sony
personnel)
E model: 120, 220 or 240 V an adjustable,
50/60 Hz
Power consumption
20 watts
Dimensions Approx 430 x 130 x 250 mm (wlh/d)
(17 x 5 /a x 97/8 inches)
including projecting parts and controls
Weight Approx, 45 kg (9 lbs 15 02)
MODEL IDENTIFICATION
- specification Label -
SONYs
MODEL NO.
TAPE CORDER
US, Canadian model: AC: 120 V 60 Hz 20 W
AEP model: AC: 220V 50/60 Hz 20W
UK model: AC: 240V 50 Hz 20W
E model: AC: 120, 220, 240 V 50/60 Hz 20 W
SAFETY CHECK-OUT (US Model)
After correcting the original service problem,
perform the following safety check 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 TEST
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.
Ii A commercial leakage tester, such as the
Simpson 229 or RCA WT-540Ar Follow the
manufacturers instructions to use these instru~
ments,
to
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 volt-
meter. The limit indication is 0.75V, 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 a 2V AC range are
suitable (See Fig, A)
To Expose-d Metal
Paris on Set
A C
/ voltmeter
i0. 75 V)
0.15uF I élE/ril
'1' Earth Ground
F ig. A. Using an AC voltmeter to check AC leakage.