1. Before returning an instrument to the customer, al-
ways make a safety check of the entire instrument, in-
cluding, but not limited to, the following items.
a. Be sure that no built-in protective devices are
defective and/or have been defeated during
servicing. (1) Protective shields are provided on
this chassis to protect both the technician and
the customer. Correctly replace all missing pro-
tective shields, including any removed for serv-
icing convenience. (2) When reinstalling the
chassis and/or other assembly in the cabinet, be
sure to put back in place all protective devices,
including,but not limited to, nonmetallic control
knobs,insulating fishpapers,adjustment and
compartment covers/shields, and isolation re-
sistor/capacitor networks. Do not operate this
instrument or permit it to be operated with-
out all protective devices correctly installed
and functioning.
b. Be sure that there are no cabinet openings
through which an adult or child might be able to
insert their fingers and contact a hazardous volt-
age. Such opening include,but are not limited to,
(1) spacing between the picture tube and the
cabinet mask, (2) excessively wide cabinet ven-
tilation slots, and (3) an improperly fitted and/or
incorrectly secured cabinet back cover.
c. Leakage Current Hot Check — With the instru-
ment completely reassembled,plug the AC line
cord directly into a 120V AC outlet (PX-42M2G :
240V AC outlet). (Do not use an isolation trans-
former during this test.) Use a leakage current
tester or a metering system that complies with
American National Standards Institutes (ANSI)
C101.1 Leakage Current for Appliances and Un-
derwriters Laboratories(UL) 1950. With the in-
strument AC switch first in the ON position and
then in the OFF position, measure from a
k n o w n e a r t h g r o u n d ( m e t a l w a t e r p i p e ,
conduit,etc.) to all exposed metal parts of the
instrument(antennas, handle bracket, metal
cabinet, screwheads, metallic overlays, control
shafts,etc.), especially any exposed metal parts
that offer an electrical return path to the chassis.
Any current measured must not exceed 3.5
milliamp. Reverse the instrument power cord
plug in the outlet and repeat test.ANY MEA-
SUREMENTS NOT WITHIN THE LIMITS
SPECIFIED HEREIN INDICATE A POTEN-
TIAL SHOCK HAZARD THAT MUST BE
ELIMINATED BEFORE RETURNING THE IN-
STRUMENT TO THE CUSTOMER.
AC Leakage Test
2. Read and comply with all caution and safety-related
notes on or inside the Monitor cabinet, on the Pro-
jection Monitor chassis, or on the picture tube.
3. Design Alteration Warning — Do not alter or add
to the mechanical or electrical design of this unit.
Design alterations and additions, including, but not
limited to, circuit modifications and the addition of
the items such as auxiliary audio and/or video out-
put connections might alter the safety characteris-
tics of this Monitor and create a hazard to the user.
Any design alterations or additions will void the
manufacturer's warranty and will make you,the
servicer,responsible for personal injury or property
damage resulting therefrom.
4. Hot Chassis Warning — a. Some
MultiSync Monitor
chassis are electrically connected directly to one
conductor of the AC power cord and may be safely
serviced without an isolation transformer only if the
AC power plug is inserted so that the chassis is
connected to the ground side of the AC power
source. To confirm that the AC power plug is in-
serted correctly, with an AC voltmeter measure be-
tween the chassis and a known earth ground. If a
voltage reading in excess of 1.0V is obtained, re-
move and reinsert the AC power plug in the oppo-
site polarity and again measure the voltage poten-
tial between the chassis and a known earth ground.
b. Some
Projection Monitor
chassis normally have
85V AC (RMS), between chassis and earth ground
regardless of the AC plug polarity. These chassis
can be safely serviced only with an isolation trans-
former inserted in the power line between the re-
ceiver and the AC power source, for both personnel
and test equipment protection. c. Some
Projection
Monitor
chassis have a secondary ground systems
in addition to the main chassis ground. This sec-
ondary ground system is not isolated from the AC
power line. The two ground system are electrically
separated by insulating material that must not be
defeated or altered.
(READING SHOULD
NOT BE ABOVE
3.5 mA)
LEAKAGE
CURRENT
TESTER
+
–
EARTH
GROUND
TEST ALL
EXPOSED METAL
SURFACES
3-WIRE CORD
ALSO TEST WITH
PLUG REVERSED
(USING AC ADAPTER
PLUG AS REQUIRED)
DEVICE
UNDER
TEST
2-2
SAFETY PRECAUTIONS
Summary of Contents for PlasmaSync PX-42M2A
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Page 135: ...METHOD OF DISASSEMBLY 7 1 1 Diagonal view of the unit front ...
Page 136: ...2 Diagonal view of the unit rear 7 2 METHOD OF DISASSEMBLY ...
Page 148: ...MEMO ...
Page 152: ...MEMO ...
Page 155: ...B SAFETY BRACKET SASSY C CAP SASSY D SERVICE BAG SASSY PACKAGING 10 2 ...
Page 157: ...PACKAGING 10 4 G CUSHION CARTON BOX ...
Page 159: ...Outer box PACKAGING 10 6 ...
Page 162: ...2 PX42M2G ...
Page 163: ...12 1 CONNECTION DIAGRAMS ...
Page 164: ...13 1 BLOCK DIAGRAMS I O ANALOG ...
Page 165: ...13 2 BLOCK DIAGRAMS VIDEO AUDIO ...
Page 166: ...13 3 BLOCK DIAGRAMS POWER UNIT ...
Page 168: ...I O PWB PWC 4213B PARTS SIDE SOLDER SIDE SCHEMATIC DIAGRAMS 14 2 ...
Page 179: ...ANALOG PWB PWC 4214 PARTS SIDE SCHEMATIC DIAGRAMS 14 13 ...
Page 180: ...ANALOG PWB PWC 4214 SOLDER SIDE SCHEMATIC DIAGRAMS 14 14 ...
Page 184: ...VIDEO PWB PWC 4213A PART SIDE SCHEMATIC DIAGRAMS 14 18 ...
Page 185: ...VIDEO PWB PWC 4213A SOLDER SIDE SCHEMATIC DIAGRAMS 14 19 ...
Page 187: ...AUDIO PWB PWC 4216A PARTS SIDE SCHEMATIC DIAGRAMS 14 21 ...
Page 188: ...AUDIO PWB PWC 4216A SOLDER SIDE SCHEMATIC DIAGRAMS 14 22 ...
Page 190: ...SOUND I O PWB PWC 4216B PART SIDE SOLDER SIDE SCHEMATIC DIAGRAMS 14 24 ...
Page 196: ...MEMO ...
Page 197: ...PRINTED IN JAPAN 9806MI1250 01272002 PX 42M2A 01272003 PX 42M2G ...