Sony TC-WA7ES Service Manual

__TG-WATES/WRO65/WR665S
SERVICE MANUAL
Photo : TC-WR665S
US Model
TC-WA7ES/WR565/WR665S
Canadian Model
AEP Model
UK Model
E Model
Australian Model
Chinese Model
TC-WR565/WR665S
* Dolby noise reduction and HX Pro headroom extension
manufactured under license from Dolby Laboratories Licensing
Corporation. HX Pro originated by Bang & Olufsen.
"DOLBY", the double-D symbol D0 and "HX PRO" are trademarks | Tape Transport Machanism | DECK A
of Dolby Laboratories Licensing Corporation.
Model Name Using Similar Mechanism | TC-WR545/WR741
TC-WR565/WR665S :
TCM-190RA14CL
TC-WAT7ES : |
TCM-190RA12CL
DECK B | TCM-190RB12CL
SPECIFICATIONS
System
Recording system
4-track 2-channel stereo
Fast-winding time (approx.)
90 sec. (with Sony C-60 cassette)
Bias AC bias
Singnal-to-noise ratio (at peak level and weighted with Dolby NR off)
Type I tape, Sony Type I (NORMAL): 55 dB
Type IL tape, Sony Type II (HIGH) : 57 dB
Type IV tape, Sony Type IV (METAL) : 58 dB
S/N ratio improvement (approximate values)
With Dolby B NR on: 5dB at 1kHz, 10dB at 5kHz
With Dolby C NR on: 15dB at 500Hz, 20dB at 1kHz
With Dolby S NR on (TC-WA7ES/WR665SS only) :
10dB at 100Hz, 24dB at 1kHz
Harmonic distortion
0.4% (with Type I tape, Sony Type I (NORMAL) :
160 nWb/m 315 Hz, 3rd H.D.)
1.8% (with Type IV tape, Sony Type IV (METAL) :
250 nWb/m 315 Hz, 3rd H.D.)
Frequency response (Dolby NR off)
Type I tape, Sony Type I (NORMAL):
30-15,000Hz ( + 3dB, IEC)
Type II tape, Sony Type II (HIGH) :
30-17,000Hz ( + 3dB, IEC)
Type IV tape, Sony Type IV (METAL) :
30-18,000Hz ( + 3dB, IEC)
30-13,000Hz ( + 3dB, — 4dB recording)
Wow and flutter
TC-WA7ES/WR665S : + 0.13% W. Peak (IEC)
0.07% W. RMS (NAB)
+ 0.18% W. Peak (DIN)
+ 0.14% W. Peak (IEC)
0.08% W. RMS (NAB)
+ 0.19% W. Peak (DIN)
Variable pitch range (approx.)
— 30 to +30%
TC-WRS65 :
Inputs
Line inputs (phono jacks)
Sensitivity : 0.16V
Input inpedance : 47 kilohms
Outputs
Line outputs (phono jacks)
Rated output level : 0.5V at a load impeadance of
47 kilohms
Load impedance : Over 10 kilohms
Headphones (stereo phone jack)
Output level : ImW at a load impedance of 32 ohms
STEREO CASSETTE DECK
SONY.