General - Sony STR-KSL7 Service Manual

STR-KSL7/SL7/TA-KSL7
EXCEPT TA-KSL7
AM tuner section
Tuning range
US, Canadian models With 10-kHz tuning scale:
530 – 1710 kHz
With 9-kHz tuning scale:
531 – 1710 kHz
E model With 10-kHz tuning scale:
530 – 1610 kHz
With 9-kHz tuning scale:
531 – 1602 kHz
Mexican model 530 – 1610 kHz
Malaysia, Singapore 531 – 1602 kHz
models
Antenna
Loop antenna
Intermediate frequency
450 kHz
Usable sensitivity 50 dB/m (at 1,000 kHz or
999 kHz)
S/N 54 dB (at 50 mV/m)
Harmonic distortion
0.5% (50 mV/m, 400 Hz)
Selectivity At 9 kHz: 35 dB
At 10 kHz: 40 dB
4) You can change the AM tuning scale to 9 kHz
10 kHz. After tuning in any AM station, turn off
the receiver. Hold down the + button and press the
button. All preset stations will be erased when
you change the tuning scale. To reset the scale to
10 kHz (or 9 kHz), repeat the procedure.

General

Power requirements
STR-SL7 : US, STR-KSL7, Canadian, Mexican models
120 V AC, 60 Hz
TA-KSL7 : AEP, UK, Chinese models
230 V AC, 50/60 Hz
STR-KSL7 : E model
110 – 120 V AC,
50/60 Hz
STR-KSL7 : Malaysia, Singapore models
220 – 230 V AC,
50/60 Hz
Power consumption
98 W
Power consumption (during standby mode)
STR-SL7 : US, STR-KSL7, Canadian, Mexican models
1.7 W
STR-KSL7 : Malaysia, Singapore models
1.9 W
430 × 83 × 289 mm
Dimensions (w/h/d)
including projecting parts
and controls
Mass (Approx.)
3.1 kg
STR-SL7 : US model
Supplied accessories
FM wire antenna (1)
AM loop antenna (1)
Remote commander RM-U305S (1)
R6 (size-AA) batteries (2)
Design and specifications are subject to change
without notice.
2
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 microamperes).
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 a 2V AC range are suitable. (See
Fig. A)
To Exposed Metal
Parts on Set
0.15 µF
Fig. A. Using an AC voltmeter to check AC leakage.
AC
Voltmeter
1.5 kΩ
(0.75 V)
Earth Ground