Safety Precautions; How To Eject The Cassette Tape - Samsung Sv-Dvd340 Service Manual

1. Precautions
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1-1 Safety Precautions
¢@ MODE SWITCH (PROGRAM SWITCH) ASSEMBLY POINT
: 1) Before returning an instrument to the customer,
1) When installing the ass'y deck on the Main PCB, be sure to align the assembly point of mode switch.
always make a safety check of the entire instrument,
including, but not limited to, the following items:
1 (1) Be sure that no built-in protective devices are
defective or have been defeated during servicing.
: = (1)Protective shields are provided to protect both
= ASSEMBLY POINT the technician and the customer. Correctly replace
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all missing protective shields, including
any
O removed for servicing convenience.
(2)When reinstalling the chassis and/or other as-
sembly in the cabinet, be sure to put back in place
| all protective devices, including, but not limited to,
nonmetallic control knobs, insulating fish papers,
adjustment and compartment covers/shields, and
yaa isolation resistor/capacitor networks. Do not oper-
ate this instrument or permit it to be operated with-
out all protective devices correctly installed and
Fig. 1 : functioning.
@ HOW TO EJECT THE CASSETTE TAPE i (2) Be sure that there are no cabinet openings through
(If the tape is stuck in the unit) which adults or children might be able to insert
their fingers and contact a hazardous voltage. Such
1) Turn the Gear Worm @ clockwise in the direction of arrow with a screwdriver. (See Fig. 2) openings include, but are not limited to, excessive-
(Other method ; Remove the screw of Motor Load Ass'y, Separate the Motor Load Ass'y) ly wide cabinet ventilation slots, and an improper-
2\When Slider S, T approachs the unloading position, rotate holder Clutch counterclockwise after inserting screwdriver in the
ly fitted and/or incorrectly secured cabinet back
frame's bottom hole in order to wind the unwound tape. (Refer to Fig. 3) cover.
directly into a 120V AC outlet. (Do not use an iso-
lation transformer during this test.) Use a leakage
current tester or a metering system that complies
with American National Standards institute (ANSI
C101.1 Leakage Current for Appliances and
Underwriters Laboratories (UL) 1270 (40.7). With
the instrument's AC switch first in the ON position
and then in the OFF position, measure from a
known earth ground (metal water pipe, conduit,
etc.) to all exposed metal parts of the instrument
(antennas, handle brackets, metal cabinets, screw-
heads, metallic overlays, control shafts, etc.), espe-
cially any exposed metal parts that offer an electri-
cal return path to the chassis.
Any current measured must not exceed 0.5mA.
Reverse the instrument power cord plug in the out-
let and repeat the test. See Fig. 1-1.
Fig. 2 Fig. 3
Samsung Electronics
Any measurements not within the limits specified
herein indicate a potential shock hazard that must
be eliminated before returning the instrument to
the customer.
iREADING SHOULD
NOT BE ABOVE
0.5mA)
DEVICE
UNDER
TEST ALL 4
EXPOSED METER
SURFACES
| | 2-WIRE CORD
iB
ALSO TEST WITH Sen
PLUG REVERSED + GROUND
{USING AC ADAPTER :
PLUG AS REQUIRED}
Fig. 1-1 AC Leakage Test
(4) Insulation Resistance Test Cold Check-(1) Unplug
the power supply cord and connect a jumper wire
between the two prongs of the plug. (2) Turn on the
power switch of the instrument. (3) Measure the
resistance with an ohmmeter between the
jumpered AC plug and all exposed metallic cabinet
parts on the instrument, such as screwheads,
antenna, control shafts, handle brackets, etc. When
an exposed metallic part has a return path to the
chassis, the reading should be between 1 and 5.2
megohm. When there is no return path to the chas-
sis, the reading must be infinite. If the reading is
not within the limits specified, there is the possibil-
ity of a shock hazard, and the instrument must be
repaired and rechecked before it is returned to the
customer. See Fig. 1-2.
Antenna
Terminal
Exposed _--—
Mertat Part
ohm
ohmmeter
Fig. 1-2 Insulation Resistance Test