Read Sony HBD-N5200W / HBD-N7200W / HBD-N7200WL / HBD-N9200W / HBD-N9200WL Service Manual online
HBD-N5200W/N7200W/N7200WL/N9200W/N9200WL
3
CAUTION
Use of controls or adjustments or performance of procedures
other than those specifi ed herein may result in hazardous radia-
tion exposure.
Use of controls or adjustments or performance of procedures
other than those specifi ed herein may result in hazardous radia-
tion exposure.
SAFETY CHECK-OUT
After correcting the original service problem, perform the follow-
ing 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.
After correcting the original service problem, perform the follow-
ing 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 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
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 manufacturers’ instructions to use these
instruments.
instruments.
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 voltmeter. The “limit” indication
is 0.75 V, so analog meters must have an accurate low-voltage
scale. The S pson 250 and Sanwa SH-63Trd are examples of a
passive VOM that is suitable. Nearly all battery operated digi-
tal multimeters that have a 2 V AC range are suitable. (See Fig.
A)
is 0.75 V, so analog meters must have an accurate low-voltage
scale. The S pson 250 and Sanwa SH-63Trd are examples of a
passive VOM that is suitable. Nearly all battery operated digi-
tal multimeters that have a 2 V AC range are suitable. (See Fig.
A)
1.5 k
Ω
0.15
μF
AC
voltmeter
(0.75 V)
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Parts on Set
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
NOTES ON CHIP COMPONENT REPLACEMENT
•
•
Never reuse a disconnected chip component.
•
Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
aged by heat.
Pick-up unit of this appliance is
classified as a CLASS 3R LASER product.
Visible and invisible laser radiation is
emitted when the laser protective
housing is opened, so be sure to avoid
direct eye exposure.
This marking is located on the bottom
exterior of the main unit.
classified as a CLASS 3R LASER product.
Visible and invisible laser radiation is
emitted when the laser protective
housing is opened, so be sure to avoid
direct eye exposure.
This marking is located on the bottom
exterior of the main unit.
This appliance is classified as a CLASS 1
This appliance is classified as a CLASS 1
LASER product by IEC60825-1:2007. This
marking is located on the bottom
exterior of the main unit.
LASER product by IEC60825-1:2007. This
marking is located on the bottom
exterior of the main unit.
LASER product. This marking is located
on the bottom exterior of the main unit.
on the bottom exterior of the main unit.
Ver. 1.4
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