MODEL IDENTIFICATIONSAFETY CHECK-OUT
N BACK PANEL N(US model only)
After correcting the original service problem, perform the
following safety checks before releasing the set to the customer:
4-987-Check the antenna terminals, metal trim, Ometallized� knobs, screws,
and all other exposed metal parts for AC leakage. Check leakage as
described below.
CDP-C591
US MODEL: 618-71
LEAKAGE
CDP-CE235
US MODEL: 618-01 The AC leakage from any exposed metal part to earth ground and
Canadian MODEL: 618-11
from all exposed metal parts to any exposed metal part having a
AEP,North European MODEL : 618-21
return to chassis, must not exceed 0.5 mA (500 microampers).
UK MODEL: 618-31Leakage current can be measured by any one of three methods.
Australian MODEL: 618-41
E,Saudi Arabia MODEL: 618-51
1. A commercial leakage tester, such as the Simpson 229 or RCA
Singapore MODEL: 618-61WT-540A. Follow the manufacturersO instructions to use these
CDP-CE335
instruments.
US MODEL: 619-01
Canadian MODEL: 619-112. A battery-operated AC milliammeter. The Data Precision 245
AEP,North European MODEL : 619-21
digital multimeter is suitable for this job.
UK MODEL: 619-31
Australian MODEL: 619-413. Measuring the voltage drop across a resistor by means of a
E,Saudi Arabia MODEL: 619-51
VOM or battery-operated AC voltmeter. The Olimit� indication
Singapore MODEL: 619-61
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. (SeeNOTES ON HANDLING THE OPTICAL PICK-UP
Fig. A)
BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostaticTo Exposed Metal
breakdown because of the potential difference generated by theParts on Set
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.AC
The flexible board is easily damaged and should be handled withvoltmeter
0.15?F1.5k1
care.(0.75V)
NOTES ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so as to be focused onEarth Ground
the disc reflective surface by the objective lens in the optical pick-
up block. Therefore, when checking the laser diode emission,Fig. A. Using an AC voltmeter to check AC leakage.
observe from more than 30 cm away from the objective lens.
N 3 N |
ACEC
