TELEVISION/MONITOR SAFETY GUIDELINES FOR THE PROFESSIONAL SERVICE TECHNICIAN
Safety Checks
Fire and Shock Hazard
Implosion
X-radiation
Af
ter t
h
e or
i
g
in
a
l s
erv
i
ce pro
bl
e
m h
a
s b
ee
n
correcte
d,
a co
m
p
l
ete
s
a
f
et
y
c
h
ec
k
sh
o
uld b
e
m
a
d
e
. B
e
su
re to c
h
ec
k
over t
h
e e
n
t
i
re
s
et
, n
ot
jus
t t
h
e area
s
wh
ere
y
o
u h
ave
w
or
k
e
d. S
o
m
e prev
i
o
us s
erv
i
cer
m
a
y h
ave
l
e
f
t a
n uns
a
f
e
co
ndi
t
i
o
n,whi
c
h
co
uld b
e
unkn
o
win
g
ly
pa
ss
e
d
o
n
to
y
o
u
r c
us
to
m
er
. B
e
su
re
to c
h
ec
k
a
ll
o
f
t
h
e
f
o
ll
o
win
g
:
1. B
e
su
re a
ll
co
m
po
n
e
n
t
s
are po
si
t
i
o
n
e
d in su
c
h
a
w
a
y
a
s
to avo
id
t
h
e
po
ssibili
t
y
o
f
a
dj
ace
n
t co
m
po
n
e
n
t
sh
ort
s. This is
e
s
pec
i
a
lly im
porta
n
t
o
n
t
h
o
s
e c
h
a
ssis whi
c
h
are tra
ns
porte
d
to a
nd f
ro
m
t
h
e
s
erv
i
ce
sh
op
.
2. N
ever re
l
ea
s
e a repa
i
re
d uni
t
unl
e
ss
a
ll
protect
i
ve
d
ev
i
ce
s su
c
h
a
s
insul
ator
s, b
arr
i
e
s,
cover
s, s
tra
in
re
li
e
fs,
a
nd
ot
h
er
h
ar
dw
are
h
ave
b
ee
n
ins
ta
ll
e
d in
accor
d
a
n
ce
wi
t
h
t
h
e or
i
g
in
a
l d
e
si
g
n.
3. S
o
ld
er
in
g a
nd wi
r
in
g
mus
t
b
e
ins
pecte
d
to
l
ocate po
ssibl
e co
ld s
o
ld
er
j
o
in
t
s,s
o
ld
er
s
p
l
a
sh
e
s,sh
arp
s
o
ld
er po
in
t
s, f
ra
y
e
d l
ea
ds,
p
in
c
h
e
d l
ea
ds,
or
d
a
m
age
d insul
at
i
o
n ( in
c
ludin
g t
h
e ac cor
d).B
e certa
in
to re
m
ove
l
oo
s
e
s
o
ld
er
b
a
lls
a
nd
a
ll
ot
h
er
l
oo
s
e
f
ore
i
g
n
part
i
c
l
e
s.
4. Ch
ec
k
acro
ss-
t
h
e
-lin
e co
m
po
n
e
n
t
s
a
nd
ot
h
er co
m
po
n
e
n
t
s f
or p
hysi
ca
l
ev
id
e
n
ce o
f d
a
m
age or
d
eter
i
orat
i
o
n
a
nd
rep
l
ace
if n
ece
ss
ar
y. F
o
ll
o
w
or
i
g
in
a
l l
a
y
o
u
t
,l
ea
d l
e
n
gt
h,
a
nd d
re
ss.
5. N
o
l
ea
d
or co
m
po
n
e
n
t
sh
o
uld
to
u
c
h
a rece
i
v
in
g t
ub
e or a re
sis
tor rate
d
at
1 w
att or
m
ore
. L
ea
d
te
nsi
o
n
aro
und
protr
udin
g
m
eta
l su
r
f
ace
s
or
e
d
ge
s mus
t
b
e avo
id
e
d.
6. C
r
i
t
i
ca
l
co
m
po
n
e
n
t
s h
av
in
g
s
pec
i
a
l s
a
f
et
y
c
h
aracter
is
t
i
c
s
are
id
e
n
t
ifi
e
d
wi
t
h
a
ns by
t
h
e
R
e
f. N
o
. in
t
h
e part
s lis
t a
nd
e
n
c
l
o
s
e
d wi
t
hin
a
b
ro
k
e
n lin
e
* (wh
ere
s
evera
l
cr
i
t
i
ca
l
co
m
po
n
e
n
t
s
are gro
u
pe
d in
o
n
e area
)
a
l
o
n
g
wi
t
h
t
h
e
s
a
f
et
y symb
o
ls
o
n
t
h
e
s
c
h
e
m
at
i
c
di
agra
ms
a
nd/
or e
x
p
l
o
d
e
d
v
i
e
ws.
7. Wh
e
n s
erv
i
c
in
g a
ny uni
t
,
a
lw
a
ys us
e a
s
eparate
is
o
l
at
i
o
n
tra
nsf
or
m
er
f
or t
h
e c
h
a
ssis F
a
ilu
re to
us
e a
s
eparate
is
o
l
at
i
o
n
tra
nsf
or
m
er
m
a
y
e
x
po
s
e
y
o
u
to po
ssibl
e
sh
oc
k h
a
z
ar
d,
a
nd m
a
y
ca
us
e
d
a
m
age to
s
erv
i
c
in
g
ins
tr
um
e
n
t
s.
8. M
a
ny
e
l
ectro
ni
c pro
du
ct
s us
e a po
l
ar
iz
e
d
ac
lin
e cor
d (
o
n
e
wid
e p
in
o
n
t
h
e p
lu
g
.) D
e
f
eat
in
g t
his s
a
f
et
y f
eat
u
re
m
a
y
create a pote
n
t
i
a
l h
a
z
ar
d
to
t
h
e
s
erv
i
ce a
nd
t
h
e
us
er
. Ex
te
nsi
o
n
cor
ds whi
c
h d
o
n
ot
in
corporate t
h
e
po
l
ar
izin
g
f
eat
u
re
sh
o
uld n
ever
b
e
us
e
d.
9. Af
ter rea
ss
e
mbly
o
f
t
h
e
uni
t
,
a
lw
a
ys
per
f
or
m
a
n l
ea
k
age te
s
t or re
sis
ta
n
ce
te
s
t
f
ro
m
t
h
e
lin
e cor
d
to a
ll
e
x
po
s
e
d m
eta
l
part
s
o
f
t
h
e ca
bin
et
. Als
o c
h
ec
k
a
ll m
eta
l
co
n
tro
l sh
a
f
t
s(wi
t
h kn
o
bs
re
m
ove
d),
a
n
te
nn
a ter
min
a
ls, h
a
ndl
e
s,
s
cre
ws,
etc
.
to
b
e
su
re t
h
e
uni
t
m
a
y b
e
s
a
f
et
y
operate
d wi
t
h
o
u
t
d
a
n
ger o
f
e
l
ectr
i
ca
l sh
oc
k.
* B
ro
k
e
n lin
e
1. All
p
i
ct
u
re t
ub
e
s us
e
d in
c
u
rre
n
t
m
o
d
e
l
rece
i
ver
s
are e
qui
ppe
d wi
t
h
a
n
in
tegra
l im
p
l
o
si
o
n sys
te
m. C
are
sh
o
uld
a
lw
a
ys b
e
us
e
d,
a
nd s
a
f
et
y
g
l
a
ss
e
s w
or
n,wh
e
n
ever
h
a
ndlin
g a
ny
p
i
ct
u
re t
ub
e
. A
vo
id s
cratc
hin
g or
ot
h
er
wis
e
d
a
m
ag
in
g t
h
e p
i
ct
u
re t
ub
e
du
r
in
g
ins
ta
ll
at
i
o
n.
2. Us
e o
nly
rep
l
ace
m
e
n
t t
ub
e
s s
pec
ifi
e
d by
t
h
e
m
a
nuf
act
u
rer
.
1. B
e
su
re proce
du
re
s
a
nd ins
tr
u
ct
i
o
ns
to a
ll y
o
u
r
s
erv
i
ce per
s
o
nn
e
l
cover
t
h
e
subj
ect o
f X-
ra
di
at
i
o
n. P
ote
n
t
i
a
l s
o
u
rce
s
o
f X-
ra
ys in TV
rece
i
ver
s
are
t
h
e p
i
ct
u
re t
ub
e a
nd
t
h
e
hi
g
h
vo
l
tage c
i
rc
ui
t
s. Th
e
b
a
si
c preca
u
t
i
o
n whi
c
h
mus
t
b
e e
x
erc
is
e
d is
to
k
eep t
h
e
hi
g
h
vo
l
tage at t
h
e
f
actor
y
reco
mm
e
nd
e
d
l
eve
l.
2. T
o avo
id
po
ssibl
e e
x
po
su
re to
X-
ra
di
at
i
o
n
a
nd
e
l
ectr
i
ca
l sh
oc
k,
o
nly
t
h
e
m
a
nuf
act
u
rer
's s
pec
ifi
e
d
a
n
o
d
e co
nn
ector
s mus
t
b
e
us
e
d.
3. I
t
is
e
ss
e
n
t
i
a
l
t
h
at t
h
e
s
erv
i
ce tec
hni
c
i
a
n h
a
s
a
n
acc
u
rate
HV m
eter
ava
il
a
bl
e at a
ll
t
im
e
s. Th
e ca
lib
rat
i
o
n
o
f
t
his m
eter
sh
o
uld b
e c
h
ec
k
e
d
per
i
o
di
ca
lly
aga
ins
t a re
f
ere
n
ce
s
ta
nd
ar
d.
4. Wh
e
n
t
h
e
HV
c
i
rc
ui
tr
y is
operat
in
g proper
ly
t
h
ere
is n
o po
ssibili
t
y
o
f
a
n x-
ra
di
at
i
o
n
pro
bl
e
m. Hi
g
h
vo
l
tage
sh
o
uld
a
lw
a
ys b
e
k
ept at t
h
e
m
a
nuf
act
u
rer
's
rate
d
va
lu
e
-n
o
hi
g
h
er
- f
or opt
imum
per
f
or
m
a
n
ce
. E
ver
y
t
im
e a co
l
or
s
et
is
s
erv
i
ce
d,
t
h
e
b
r
i
g
h
t
n
e
ss sh
o
uld b
e r
un u
p a
nd d
o
wn whil
e
m
o
ni
tor
in
g t
h
e
HV wi
t
h
a
m
eter to
b
e certa
in
t
h
at t
h
e
HV is
reg
ul
ate
d
correct
ly
a
nd d
oe
s
n
ot e
x
cee
d
t
h
e
s
pec
ifi
e
d
va
lu
e
. W
e
su
gge
s
t t
h
at
y
o
u
a
nd y
o
u
r tec
hni
c
i
a
ns
rev
i
e
w
te
s
t proce
du
re
s s
o t
h
at
HV
a
nd HV
reg
ul
at
i
o
n
are a
lw
a
ys
c
h
ec
k
e
d
a
s
a
s
ta
nd
ar
d s
erv
i
c
in
g proce
du
re
,
a
nd
t
h
e rea
s
o
n f
or t
his
pr
ud
e
n
t ro
u
t
in
e
is
c
l
ear
ly und
er
s
too
d by
ever
y
o
n
e
. I
t
is im
porta
n
t to
us
e a
n
acc
u
rate a
nd
re
li
a
bl
e
HV m
eter
. I
t
is
reco
mm
e
nd
e
d
t
h
at t
h
e
HV
recor
d
e
d
o
n
eac
h
c
us
to
m
er
's in
vo
i
ce
, whi
c
h will d
e
m
o
ns
trate a proper co
n
cer
n f
or t
h
e
c
us
to
m
er
's s
a
f
et
y.
5. Wh
e
n
tro
ubl
e
sh
oot
in
g a
nd m
a
kin
g te
s
t
m
ea
su
re
m
e
n
t
s in
a rece
i
ver
wi
t
h
a pro
bl
e
m
o
f
e
x
ce
ssi
ve
hi
g
h
vo
l
tage
,
re
du
ce t
h
e
lin
e vo
l
tage
by m
ea
ns
o
f
a
V
ar
i
ac to
b
r
in
g t
h
e
HV in
to accepta
bl
e
limi
t
s whil
e tro
ubl
e
sh
oot
in
g
. D
o
:
:
WARNING
OFF
SERVICE NOTE
B
e
f
ore re
m
ov
in
g t
h
e
CRT
a
n
o
d
e cap
,
t
u
r
n
t
h
e
uni
t
a
nd sh
ort t
h
e
HI
G
H VOLTA
G
E
to t
h
e
CRT DA
G gro
und.
Th
e
CRT DA
G
is n
ot at c
h
a
ssis
gro
und.
6. N
e
w
p
i
ct
u
re t
ub
e
s
are
s
pec
ifi
ca
lly d
e
si
g
n
e
d
to
wi
t
hs
ta
nd hi
g
h
er operat
hn
g
vo
l
tage
s wi
t
h
o
u
t creat
in
g
und
e
si
ra
bl
e
X-
ra
di
at
i
o
n. I
t
is s
tro
n
g
ly
reco
mm
e
nd
e
d
t
h
at a
ny sh
op te
s
t
fix
t
u
re
whi
c
h is
to
b
e
us
e
d wi
t
h
t
h
e
n
e
w
hi
g
h
er vo
l
tage c
h
a
ssis b
e e
qui
ppe
d wi
t
h
o
n
e o
f
t
h
e
n
e
w
t
y
pe t
ub
e
s
d
e
si
g
n
e
d f
or t
his s
erv
i
ce
. Addi
t
i
o
n
o
f
a per
m
a
n
e
n
t
ly
co
nn
ecte
d HV m
eter
to t
h
e
sh
op te
s
t
fix
t
u
re
is
a
d
v
is
a
bl
e
. Th
e
CRT
t
y
pe
s us
e
d in
t
h
e
s
e
n
e
w
s
et
s sh
o
uld n
ever
b
e rep
l
ace
d wi
t
h
a
ny
ot
h
er t
y
pe
s,
a
s
t
his m
a
y
re
sul
t
in
e
x
ce
ssi
ve
X-
ra
di
at
i
o
n.
7. I
t
is
e
ss
e
n
t
i
a
l
to
us
e t
h
e
s
pec
ifi
e
d
p
i
ct
u
re t
ub
e to avo
id
a po
ssibl
e
X-di
at
i
o
n
pro
bl
e
m.
8. M
o
s
t
TV
rece
i
ver
s
co
n
ta
in s
o
m
e t
y
pe o
f
e
m
erge
n
c
y "H
o
ld D
o
wn"
c
i
rc
ui
t to
preve
n
t
HV f
ro
m
r
isin
g to e
x
ce
ssi
ve
l
eve
ls in
t
h
e pre
s
e
n
ce o
f
a
f
a
ilu
re
m
o
d
e
. Th
e
s
e var
i
o
us
c
i
rc
ui
t
s sh
o
uld b
e
und
er
s
too
d by
a
ll
tec
hni
c
i
a
ns
s
erv
i
c
in
g t
h
e
m,
e
s
pec
i
a
lly sin
ce
m
a
ny h
o
ld d
o
wn
c
i
rc
ui
t
s
are
in
operat
i
ve
a
s l
o
n
g a
s
t
h
e rece
i
ver per
f
or
ms n
or
m
a
lly.
1. Un
p
lu
g t
h
e ac
lin
e cor
d
a
nd
co
nn
ect a
jum
per
b
et
w
ee
n
t
h
e t
w
o pro
n
g
s
o
f
t
h
e p
lu
g
.
2. Tu
r
n
o
n
t
h
e po
w
er
swi
tc
h.
3. M
ea
su
re t
h
e re
sis
ta
n
ce va
lu
e
b
et
w
ee
n
t
h
e
jum
pere
d
ac p
lu
g a
nd
a
ll
e
x
po
s
e
d
ca
bin
et part
s
o
f
t
h
e rece
i
ver
, su
c
h
a
s s
cre
w h
ea
ds,
a
n
te
nn
a
s,
a
nd
co
n
tro
l sh
a
f
t
s. Wh
e
n
t
h
e e
x
po
s
e
d m
eta
lli
c part
h
a
s
a ret
u
r
n
pat
h
to
t
h
e c
h
a
ssis,
t
h
e rea
din
g
sh
o
uld b
e
b
et
w
ee
n 1 m
ego
hm
a
nd 5.2 m
ego
hms.
Wh
e
n
t
h
e e
x
po
s
e
d m
eta
l d
oe
s n
ot
h
ave a ret
u
r
n
pat
h
to t
h
e c
h
a
ssis,
t
h
e
rea
din
g
mus
t
b
e
infini
t
y. R
e
m
ove t
h
e
jum
per
f
ro
m
t
h
e ac
lin
e cor
d.
1. D
o
n
ot
us
e a
n is
o
l
at
i
o
n
tra
nsf
or
m
er
f
or t
his
te
s
t
. Plu
g t
h
e co
m
p
l
ete
ly
rea
ss
e
mbl
e
d
rece
i
ver
di
rect
ly in
to t
h
e ac o
u
t
l
et
.
2. C
o
nn
ect a
1.5k, 10w
re
sis
tor para
ll
e
l
e
d by
a
0.15uf.
capac
i
tor
b
et
w
ee
n
eac
h
e
x
po
s
e
d m
eta
lli
c ca
bin
et part a
nd
a goo
d
eart
h
gro
und su
c
h
a
s
a
w
ater p
i
pe
,
a
s sh
o
wn
a
b
ove
.
3. Us
e a
n
ac vo
l
t
m
eter
wi
t
h
at
l
ea
s
t
5000
o
hms
vo
l
t
s
e
nsi
t
i
v
i
t
y
to
m
ea
su
re
t
h
e pote
n
t
i
a
l
acro
ss
t
h
e re
sis
tor
.
4. Th
e pote
n
t
i
a
l
at a
ny
po
in
t
sh
o
uld n
ot e
x
cee
d 0.75
vo
l
t
s. A l
ea
k
age c
u
rre
n
t
te
s
ter
m
a
y b
e
us
e
d
to
m
a
k
e t
his
te
s
t
; l
ea
k
age c
u
rre
n
t
mus
t
n
ot e
x
cee
d
0.5 milli
a
m
p
s. If
a
m
ea
su
re
m
e
n
t
is
o
u
t
sid
e o
f
t
h
e
s
pec
ifi
e
d limi
t
s,
t
h
ere
is
a po
ssibili
t
y
o
f sh
oc
k h
a
z
ar
d. Th
e rece
i
ver
sh
o
uld b
e repa
i
re
d
a
nd
rec
h
ec
k
e
d b
e
f
ore ret
u
r
nin
g
i
t to t
h
e c
us
to
m
er
.
5. R
epeat t
h
e a
b
ove proce
du
re
wi
t
h
t
h
e ac p
lu
g rever
s
e
d.( N
ote
: An
ac
a
d
apter
is n
ece
ss
ar
y wh
e
n
a po
l
ar
iz
e
d
p
lu
g
is us
e
d. D
o
n
ot
d
e
f
eat t
h
e
po
l
ar
izin
g
f
eat
u
re o
f
t
h
e p
lu
g
.)
Th
e pr
im
ar
y s
o
u
rce o
f X-
ra
di
at
i
o
n in
t
his
te
l
ev
isi
o
n
rece
i
ver
is
t
h
e p
i
ct
u
re
t
ub
e
. Th
e p
i
ct
u
re t
ub
e
u
t
iliz
e
d in
t
his
c
h
a
ssis is s
pec
i
a
lly
co
ns
tr
u
cte
d
to
limi
t
X-
ra
di
at
i
o
n
e
missi
o
ns. F
or co
n
t
inu
e
d X-
ra
di
at
i
o
n
protect
i
o
n,
t
h
e rep
l
ace
m
e
n
t
t
ub
e
mus
t
b
e t
h
e
s
a
m
e t
y
pe a
s
t
h
e or
i
g
in
a
l, in
c
ludin
g
suffix l
etter
,
or a
Phili
p
s
approve
d
t
y
pe
.
M
a
ny
e
l
ectr
i
ca
l
a
nd m
ec
h
a
ni
ca
l
part
s in Phili
p
s
te
l
ev
isi
o
n s
et
s h
ave
s
pec
i
a
l
s
a
f
et
y
re
l
ate
d
c
h
aracter
is
t
i
c
s. Th
e
s
e c
h
aracter
is
t
i
c
s
are o
f
te
n n
ot ev
id
e
n
t
f
ro
m
v
isu
a
l ins
pect
i
o
n n
or ca
n
t
h
e protect
i
o
n
a
ff
or
d
e
d by
t
h
e
m n
ece
ss
ar
ily b
e
o
b
ta
in
e
d by usin
g rep
l
ace
m
e
n
t co
m
po
n
e
n
t
s
rate
d f
or
hi
g
h
er vo
l
tage
, w
attage
,
etc
. Th
e
us
e o
f
a
subs
t
i
t
u
te part
whi
c
h d
oe
s n
ot
h
ave t
h
e
s
a
m
e
s
a
f
et
y
c
h
aracter
is
t
i
c
s
a
s
t
h
e
Phili
p
s
reco
mm
e
nd
e
d
rep
l
ace
m
e
n
t part
sh
o
wn in
t
his
s
erv
i
ce
m
a
nu
a
l m
a
y
create
sh
oc
k, fi
re
,
or ot
h
er
h
a
z
ar
ds
Leakage Current Cold Check
Leakage Current Hot Check
Picture Tube Replacement
Parts Replacement
1500
o
hm, 10W
0.15 uF
WATER
PIPE
EARTH
G
ROUND
TO
INSTRUMENTS
EXPOSED
METAL PARTS
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