CDP-590
TABLE OF CONTENS
Section Title Page
Specifications 1
1. GENERAL 4
2. iC FUNCTION DESCRIPTION 5
3. DISSASSEMBLY OF BASE UNIT 6
4. ADJUSTMENTS 7
5. DIAGRAMS H
5-1. Waveforms 11
5-2- Printed Wiring Boards 12
5-3. Schematic Diagram 15
5-
4. IC Block Diagrams 19
6. EXPLODED VIEWS 21
6-
1. Cabinet Section 21
6-2. Front Panel Section 22
6-3. MD Section-KCDM L4-5RD1) 23
6-4. MD Section-2(BU-5BDl) 24
7. ELECTRICAL PARTS LIST 25
SUPPLEMENT-1 (AEP and UK Model)
3. Measuring the voltage drop across a resistor by
means of aVOM or battery-operated AC volt-
meter. The “limit” indication is 0.75V, so
analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa
SH-63Trd are examples of apassive VOM that
is suitable. Nearly all battery operated digital
multimeters that have a2V AC range are
suitable. (See Fig. A)
To Exposed Metal
Parts on Set
0.15;^
-r- Earth Ground
AC
voltmeter
(0.75V)
Fig. A. Using an AC voltmeter to check AC leakage.
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 to any
exposed metal part having areturn to chassis, must
not exceed 0.5 mA (500 microampers). Leakage
current can be measured by any one of three
methods.
1.Acommercial leakage tester, such as the
Simpson 229 or RCA WT-S40A. Follow the
manufacturers’ instructions to use these instru-
ments.
2. Abattery-operated AC milliammeter. The Data
Precision 245 digital multimeter is suitable for
this job.
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.
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