CSD-XD51
Power outputNOTES ON HANDLING THE OPTICAL PICK-UP BLOCK
4.5 W + 4.5 W (at 3.2 ohms, 10% harmonic distortionOR BASE UNIT
(DC))
Power requirementsThe laser diode in the optical pick-up block may suffer electrostatic
For CD stereo radio cassette recorder:break-down because of the potential difference generated by the
120V AC, 60 Hzcharged electrostatic load, etc. on clothing and the human body.
9 V DC, 6 size D (R20) batteriesDuring repair, pay attention to electrostatic break-down and also
Power consumptionuse the procedure in the printed matter which is included in the
AC 17 Wrepair parts.
Battery lifeThe flexible board is easily damaged and should be handled with
For CD stereo radio cassette recorder:care.
FM recording
Sony R20P: approx. 12 hNOTES ON LASER DIODE EMISSION CHECK
Sony alkaline LR20: approx. 34 h
The laser beam on this model is concentrated so as to be focused on
Tape playback
the disc reflective surface by the objective lens in the optical pick-
Sony R20P: approx. 5.5 Ah
up block. Therefore, when checking the laser diode emission,
Sony alkaline LR20: approx. 15.5 h
observe from more than 30 cm away from the objective lens.
CD playback
Sony R20P: approx. 2.5 h
Sony alkaline LR20: approx. 12 h
SAFETY CHECK-OUT
DimensionsAfter correcting the original service problem, perform the following
Approx. 552 x 271 x 318 mm (w/h/d)safety checks before releasing the set to the customer:
351
(21 � x 10 � x12 � inches) (incl. projecting parts)Check the antenna terminals, metal trim, Ometallized� knobs, screws,
482
MassApprox. 5.4 kg (11 lb. 14 oz) (incl. batteries)and all other exposed metal parts for AC leakage. Check leakage as
Supplied accessorydescribed below.
AC power cord (1)
LEAKAGE
Design and specifications are subject to changewithout notice.
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 manufacturersO instructions to use these
instruments.
CAUTION
2. A battery-operated AC milliammeter. The Data Precision 245
Use of controls or adjustments or performance of procedures
digital multimeter is suitable for this job.
other than those specified herein may result in hazardous
radiation exposure.
3. Measuring the voltage drop across a resistor by means of a
VOM or battery-operated AC voltmeter. The Olimit� indication
Flexible Circuit Board Repairingis 0.75 V, so analog meters must have an accurate low-voltage
Y Keep the temperature of soldering iron around 270uCscale. The Simpson 250 and Sanwa SH-63Trd are examples
during repairing.of a passive VOM that is suitable. Nearly all battery operated
Y Do not touch the soldering iron on the same conductor of thedigital multimeters that have a 2V AC range are suitable. (See
circuit board (within 3 times).Fig. A)
Y Be careful not to apply force on the conductor when soldering
or unsoldering.
To Exposed Metal
Parts on Set
Notes on chip component replacement
Y Never reuse a disconnected chip component.
Y Notice that the minus side of a tantalum capacitor may be
damaged by heat.
AC
Voltmeter
0.15 ?F1.5 k&
(0.75 V)
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
2 |
ACEC
AIWA
