Sony CSD-XD55 Service Manual page 2

CSD-XD55
Ver 1.1
Ver 1.1
General
Speaker
Full range: 10 cm dia., 3.2 ohms, cone type (4)
Tweeter: 2.0 cm (2)
Outputs
Headphones jack (stereo minijack)
For 16 - 68 ohms impedance headphones
Power output
4.5 W + 4.5 W (at 3.2 ohms, 10% harmonic
distortion (DC))
Power requirements
For CD stereo radio cassette recorder:
US, CND model
120V AC, 60 Hz
Central American model and South American
model:
110 - 127V, 220 - 240V AC selectable,
50/60 Hz
Other models:
230 V AC, 50 Hz
9 V DC, 6 size D (R20) batteries
For remote control
3 V DC, 2 size AA (R6) batteries
Power consumption
US model, Canadian model, Central American
model and Soy∫h American model :
AC 17 W
Other models:
AC 16 W
Battery life
For CD stereo radio cassette recorder:
FM recording
Sony R20P: approx. 12 h
Sony alkaline LR20: approx. 34 h
Tape playback
Sony R20P: approx. 5.5 Ah
Sony alkaline LR20: approx. 15.5 h
CD playback
Sony R20P: approx. 2.5 h
Sony alkaline LR20: approx. 12 h
Dimensions
Approx. 552 x 271 x 318 mm (w/h/d)
3 5 1
(21 ⁄ x 10 ⁄ x12 ⁄ inches) (incl. projecting parts)
4 8 2
Mass
Approx. 5.4 kg (11 lb. 14 oz) (incl. batteries)
Supplied accessory
AC power cord (1)
Remote control (1)
Design and specifications are subject to changewithout notice.
• Abbreviation
CND : Canadian model
SP : Singapore model
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous
radiation exposure.
Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270˚C during
repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering
or unsoldering.
2
All manuals and user guides at all-guides.com
Notes on Chip Component Replacement
NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK
OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic
breakdown because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic breakdown and also use
the procedure in the printed matter which is included in the repair
parts.
The flexible board is easily damaged and should be handled with care.
NOTES ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so as to be focused on
the disc reflective surface by the objective lens in the optical pick-
up block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.
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
2. A battery-operated AC milliammeter. The Data Precision 245
3. Measuring the voltage drop across a resistor by means of a
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be
damaged by heat.
SAFETY CHECK-OUT
WT-540A. Follow the manufacturers' instructions to use these
instruments.
digital multimeter is suitable for this job.
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
1.5 kΩ
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
AC
Voltmeter
(0.75 V)