U.S. Department of Defense Test Sets Electron Tube TV-2A/U User Manual

39. Replacement of Fuses and Lamps

T h e t w o f u s e s ( F 1 a n d F 2 ) a n d t h e t w o g l o w l a m p s ( 1 1 C a n d

1 2 C ) a r e r e m o v a b l e f r o m t h e f r o n t p a n e l o f t h e t u b e t e s t e r .

a . R e p l a c e m e n t o f F u s e s . F u s e s F 1 a n d F 2 a r e 3 - a m p e r e , 2 5 0 -

v o l t , ¼ - b y 1 ¼ - i n c h , c a r t r i d g e - t y p e f u s e s ( f i g . 5 ) . T o r e m o v e a
f u s e , p r e s s t h e f u s e h o l d e r c a p a n d t u r n i t c o u n t e r c l o c k w i s e . R e -

move the cap, and then remove the fuse from its holder.

C a u t i o n : The fuses are rated at 3 amperes each. When replac-

ing a fuse, be careful to use a fuse of the same rating.

b . R e p l a c e m e n t o f L a m p s . L a m p s 1 1 C a n d 1 2 C a r e g l o w l a m p s

( f i g . 1 ) w i t h m i n i a t u r e - b a y o n e t b a s e s . T o r e m o v e a g l o w l a m p ,

u n s c r e w t h e i n d i c a t o r l i g h t l e n s , p r e s s t h e l a m p i n w a r d a n d

r o t a t e i t c o u n t e r c l o c k w i s e , a n d w i t h d r a w t h e g l o w l a m p f r o m i t s

s o c k e t .