Sony cdp 338esd - Manual (Page 2)

CDP-338ESD/608ESD
TABLE OF CONTENTS
Section Title Page
Remote commander
Remote control system
Power requirements
Dimensions
Weight
Supplied accessories
Connecting cord
Remote commander
Size AA batteries
Screws
Infrared control
3 V DC with two batteries size AA
(lEC designation R6)
67X20X175 mm (w/h/d)
(2V.X’V,6X 7 inches)
135g(4.7oz)
Including batteries
1
(2 phono plugs
1
2
4
2 phono plugs)
Design and specifications subject to change without notice.
1. GENERAL
1-1. Location of Controls..................................................... 3
2. ELECTRICAL ADJUSTMENTS ....................................... 4
3. DIAGRAMS
3-1. Circuit Boards Location ..............................................7
3-2. Printed Wiring Boards................................................. 9
3-3. Schematic Diagram.....................................................13
3- 4. Semiconductor Lead Layouts ............. 18
4. EXPLODED VIEWS
4- 1. Cover Section ....................................... 21
4-2. Front Panel Section ................................................... 22
4-3. Chassis Section............................................................23
4-4. Mechanism Section..................................................... 24
4-5. Optical Pick-Up Block Section ................................. 25
5. ELECTRICAL PARTS LIST .............................................. 26
SAFETY CHECK-OUT
After correcting the original service problem,
perform the following safety check 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 TEST
The AC leakage from any exposed metal part to
earth ground and from all exposed metal parts tp any
exposed metal part having a return to chassis, must
not exceed 0.5 mA (500 microampers). 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 instru­
ments.
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 volt­
meter. 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 Meta!
Parts on Set
0
.
15
pF -p •I.Skii
AC
voltmeter
(0.75 Vi
— Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
SERVICING NOTE
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 poten­
tial difference generated by the charged electrostatic
load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break­
down 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.
CAUTION
Use of controls or adjustments or performance
of procedures other than those specified herein
may result in hazardous radiation exposure.
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 check­
ing the laser diode emission, observe from more than 30
cm away from the objective lens.