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TC-WR690/WR790
SERVICE MANUAL
"SAUTO
REVERSE
[>
cone
Photo
SPECIFICATIONS
4-track 2-channel stereo
Approx. 90 sec. (with Sony C-60
Recording system
Fast winding time
cassette)
Bias
AC bias
Signal-to-noise ratio (at peak level)
Cassette
(Dolby NR
Type |
(Sony HF-S)
Type IV
(Sony Metal-
Select/S)
Type Il
(Sony UX-S)
OFF)
57 dB
Measured at peak level weighted without NR. The S/N is
improved by about 15 dB at 500 Hz and by about 20 dB
about 1 kHz with Dolby-C NR on, and by 5 GB at 1 kHz and
by 10 dB about 5 kHz with Dolby-B NR on.
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 |
cassette
(Sony HF-S)
30 - 15,000 Hz
(+3 dB, IEC)
Type IV
Type Il
cassette (Sony | cassette
Metal-Select/S)| (Sony UX-S)
30 - 18,000 Hz | 30 - 16,000 Hz
(43 dB, IEC)
| (+3 dB, IEC)
30 - 13,000 Hz
[+3 dB (-4 dB)
recording]
30 - 19,000 Hz | 30 - 18,000 Hz
(43 dB,IEC)
| (+3 dB, IEC)
30 - 13,000 Hz
[+3 dB (-4dB)
30 - 16,000 Hz
(+3 dB, IEC)
: TC-WR790
Model Name Using Similar Mechanis
US Model
Canadian
Model
AEP Model
UK Model
TC-WR690/WR790
E Model
TC-WR690
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TC-WR521/WR590
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+0.13% W.Peak (IEC)
0.07% W.RMS (NAB)
+0.18% W.Peak (DIN)
Wow and flutter
Inputs
Line inputs
Sensitivity
0.16 V
(phono jacks)
Input impedance
47 kilohms
Outputs
Line outputs
(phono jacks)
Headphones
(stereo phone jack)
0.5 V at a load
impedance of
47 kilonms
Load impedance | Over.10 kilohms
Output level
1 mW ata
load
impedance of
32 ohms
Rated output
level
General
Power requirements
US, Canadian model:
120V AC, 60Hz
UK model:
* 240V AC (or 220V AC adjustable
by Sony personnel), 50/60Hz
AEP, Germany model:
220—230V AC, (or 240V AC adjustable
by Sony personnel), 50/60Hz
E model:
120, 220, or 240V AC adjustable,
50/60Hz
—Continued on next page—
STEREO CASSETTE DECK
SONY.
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