Teac MV1421, Service Manual

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2. SAFETY INSTRUCTION
2-1. X-RAY RADIATION PRECAUTION
1 . E x c e ss iv e h ig h v o ltag e ca n p ro d u c e p o te ntia lly h a z a rdo u s X -R AY R A D IAT IO N .To a vo id s u ch ha z a rd s,
th e h ig h v o lta g e m u s t n o t e x ce e d the s p e cifie d lim it. T h e n o m ina l v a lu e o f th e h ig h v olta g e o f th is re ce iv e r is
2 2 -2 3 kv (1 4 ”), 2 5 -26 k v (2 0 ”, 2 1 ”) a t m a x b e a m cu rren t.
T h e h ig h v o lta g e m u s t n o t, u n d er a n y circ u m s ta n c e s, e x ce e d 27 .5 kv (1 4 ", 2 0 ”), 2 9 .0 k v(2 1 ”).
E a ch tim e a re c e ive r re q u ire s s e rv ic in g , th e h igh vo lta g e s h o u ld b e ch e c ke d . It is rec o m m e n de d th e
re a d in g o f th e h ig h vo lta g e re c ord e d a s a p a rt o f th e s e rv ic e re co rd s . it is im p o rta n t to u s e a n a c c u ra te
a n d re lia b le h ig h v o lta g e m e te r.
2 . T h e o n ly s o u rce o f X -R AY R a d ia tio n in th is T V re ce iv e r is th e p ic tu re tu b e . F o r c o n tin u o u s R A D IAT IO N
p ro te c tio n , th e re p la ce m e n t tu b e m us t b e e x a ctly th e s a m e typ e tu b e a s s p e c ifie d in th e p a rts lis t.
2-2. SAFETY PRECAUTION
1 . P o te n tia ls o f h ig h vo lta g e a re p re se n t w h e n th is re ce iv e r is o p e ra tin g . O p e ra tio n o f th e re c e ive r ou tsid e
th e c a b in e t o r w ith th e b a c k co v e r re m o v e d in v o lve s a sh o c k h a za rd fro m th e re c e ive r.
1 ) S e rvic in g s h o u ld n o t b e atte m p te d b y a n y o n e w h o is no t th o ro u g h ly fa m iliar w ith th e p re c au tio n s
n e c e s sa ry w h e n w o rk in g o n h ig h vo lta g e e q u ip m e n t.
2 ) A lw a ys d isc h a rg e th e p ictu re tu b e to a v o id th e s h o ck h a z a rd b e fo re re m o v in g th e a n o d e c a p .
3 ) D is c ha rg e th e h ig h p o te n tia l o f th e p ictu re tu b e b e fo re h a n d lin g th e tu b e . T h e p ic tu re tu b e is h ig h ly
e v a c u ate d a n d if b ro k e n , g la ss frag m e n ts w ill b e v io le n tly e xp e lle d .
2 . If a n y F u s e in th is T V re c e iv e r is b lo w n , re p la c e it w ith th e F U S E sp e c ifie d in th e R e p la ce m e n t P a rts L is t.
3 . W h e n re p la cin g a h ig h w a tta g e re s is to r(o x id e m e ta l film re s isto r) in c ircu it b o a rd , k ee p th e re s is to r 1 0 m m
a w a y fro m c irc u it b o a rd .
4 . K e e p w ire s a w a y fro m h ig h v o ltag e o r h ig h te m p e ra tu re c o m p o n e n ts .
5 . T h is re ce ive r m u st o p e ra te un d e r A C 2 6 0 v o lts , 5 0 H z /6 0 H z .
(A C 1 0 0 ~ 2 50 vo lts , 5 0/6 0 H z)N E V E R c o n n e ct to D C s u p p ly o r a n y o th e r p o w e r o r freq u e n c y.
2-3. PRODUCT SAFETY NOTICE
M a n y e le c tric a l a n d m e c h an ica l p a rts in th is c h a ss is h a v e s pe c ia l sa fe ty -re la te d c h a ra c te ris tic s .
T h e s e c h a ra c te ris tic s a re o fte n p a s s ed u n n o tic e d b y a vis u a l in sp e c tio n a n d th e X -R AY R A D IAT IO N p ro te c tio n
a ffo rd e d b y the m c a n n o t ne c e s sa rily b e o bta in e d b y u s in g re p la c e m e n t co m p on e n ts rate d fo r h ig h e r v o lta g e ,
w a tta ge , e tc. R e p la c e m e n t p a rts w h ich h a ve th e s e s p ec ia l sa fe ty c h a rac teris tics a re ide n tifie d in th is m a n u a l
a n d its s u pp lem e n ts , e le ctrica l co m p o n en ts h a vin g s u ch fe a tu re s a re id e n tifie d b y d es ig n a ted sy m b o l o n th e
p a rts lis t. B e fo re re p la c in g a n y o f the s e c o m p o n e n ts , re a d th e p a rts lis t in th is m a n u a l ca re fu lly.
T h e us e o f s u b stitute re p la c e m e n t p a rts w h ich d o n o t h a ve th e sa m e sa fe ty c h a ra cte ris tics a s s p e cifie d in th e
p a rts lis t m a y c re a te d X -R AY R a dia tio n .
BEFORE SERVICING THIS CHASSIS, READ THE “X-RAY RADIATION PRECAUTION”,
“SAFETY PRECAUTION” AND “PRODUCT SAFETY NOTICE” BELOW.
W ARN ING