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4 .
ACCESS
4 . 1 .
G E N E R A L
The opening of covers or removar of parts, except
those which access can be gained by hand, is rikery to
expose live parts and also accessible terminals may be live.
The instrument shall be disconnected from all voltage
sources before any adjustment, replacement or repair
d u r i n g w h i c h t h e i n s t r u m e n t w i l l b e o p e n e d .
lf afterwards any adiustment or repair of the opened
instrumenr uncter vottage is inevitable, it shall be
carred out onry by a skiIed person who is aware of the
danger invorved.
B e a r i n m i n d t h a t c a p a c ; t o r s i n s i d e t h e i n s t r u m e n t m a y
s t i l l o e c h a r g e d , e v e n i f t h e j n s t r u m e n t h a s b e e n
separated from all voltage sources.
4 . 2 .
D I S M A N T L T N G T H E p M 2 5 1 7 ( F i s u r e 3 9 )
-
Remove the batterv cover
-
Remove the two special nuts situated under the battery
cover
- T h e f r o n t a n d t h e r e a r c o v e r
c a n b e p u l l e d ( i t e m 1 F i g . 3 9 ) f r o m t h e p l \ 4 2 5 1 7 n o w
Note: Take care that the wiring to the battery
compartment does not break. When a pM 92lg (9 V power
suppry) is used. the wire; can be unsordered from
the battery compaftment during fepair of the
PM 2517.
4 . 3 .
R E P L A C T N G P A R T S
4.3.1.
Stide swirch ON/STAND BY/OFF 52 (Figure 40)
4.3.1,1. Printed circuit board part of 52
R e m o v e t h e t w o r e t a i n i n g r i n g s f r o m t h e s l j d e b o d i e s ( i t e m
1 F i g . 4 0 ) . T h e s l i d e s w i t c h c o n s i s t s o f t w o b o d i e s .
ln the bottoffi body the swjtch contacts are situated.
A switch contact consists of a spring and a slider.
Note:
,All
parts of slide switch 52 are in stock separatelv.
when a complete switch has to be replaced all parl5
56prJ14 be ordered. when mounting the slide
switch again' push both bodies slightly on the p.c.
board and stide the retaining rings oi the prns agarn.
4.3.1.2. Topcover part of 52 (Figure 4l and 42)
- Remove the screening plate
situated inside the topcover
-
R e m o v e t h e l o c k i n g s p r i n g b y b e n d i n g o u t t h e t w o l i p s ( i t e m
I F i g . 4 1 )
- W h e n m o u n t i n g t h e s w i t c h
a g a i n , t a k e c a r e t h a t t h e l o c k i n g s p r | n g r n n o t f i t t o o
t i g h t ( F i g . 4 2 )
4.3-2.
Function switch S1 (Figure 41)
4.3,2.1. Topcover part Sl
Remove the screening plate situated inside the top cover.
The function switch (item 3) and the two teaf
springs (item 2) are accessible and can be replaced without
anv rroubte.
4.3.2.2. Printed circuit boad part Sl (Figure 4O)
- The p.c. board part of function
switch Sl consists of:
- 2 slide bodies
- 8 s p r i n g s
- 8 switch contacts
- R e m o v e t h e s c r e w s a n d n u t s f r o m t h e s l i d e b o d i e s ( i t e m 3 ) . T h e b o d i e s c a n b e l i f t e d f r o m t h e p . c . b o a r d n o w .
Note: From function switch only the separate parts
are in stock. When the complete switch has to be
replaced all parts should be ordered.
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