Lotus TURBO ESPRIT Service Manual page 459

Turbo esprit; esprit s3 lotus
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SECTION M B
Page
7 7
MB.4.
-
LUMENITION IGNITION SYSTEM
E a r l y S e r i e s
3
a n d T u r b o m o d e l s u s e d L u m e n i t i o n i n f r a r e d s o l i d s t a t e
c o n t a c t b r e a k e r l e s s i g n i t i o n .
On e a r l y T u r b o m o d e l s , t h e L u m e n i t i o n
power m o d u l e was mounted on t h e e n g i n e bay s i d e o f t h e r i g h t h a n d f u e l
t a n k w e l l , b u t w a s moved o n i n t r o d u c t i o n o f t h e E s p r i t S3, t o t h e
i g n i t i o n box a t t h e r e a r o f t h e e n g i n e bay.
An o p t i c a l s w i t c h i s f i t t e d i n t h e o t h e r w i s e s t a n d a r d d i s t r i b u t o r a n d i s
o p e r a t e d by a 4
-
b l a d e c h o p p e r f i t t e d o v e r t h e d i s t r i b u t o r cam.
A
s p e c i a l f i b r e w a s h e r
i s
s o m e t i m e s u s e d below t h e c h o p p e r b l a d e t o
a c h i e v e t h e c o r r e c t b l a d e h e i g h t t h r o u g h t h e o p t i c a l s w i t c h .
Two t y p e s o f L u m e n i t i o n s y s t e m h a v e b e e n u s e d , t h e e a r l i e r M k 16 t y p e
b e i n g s u p e r c e d e d by t h e M k 17 t y p e , d u r i n g 1 9 8 0 a s a r u n n i n g c h a n g e o n
p r o d u c t i o n .
Components o f e i t h e r t y p e a r e n o t i n d i v i d u a l l y c o m p a t i b l e .
I d e n t i f i c a t i o n
-
Power Module
I d e n t i f i c a t i o n o f power m o d u l e s i s o n l y p o s s i b l e by t h e c o l o u r o f t h e
r e s i n o r p l a s t i c b l o c k s e a l i n g t h e w i r e s i n t o t h e module u n i t .
Mk16 u n i t s a r e s e a l e d w i t h r e d o r b l a c k r e s i n .
.
Mk17 u n i t s a r e s e a l e d by
a w h i t e p l a s t i c clamp.
-
O p t i c a l S w i t c h
MK 1 6 o p t i c a l s w i t c h u n i t s a r e marked w i t h numbers s i m i l a r t o 8 2 4 0 , t h e
8 a n d 0 b e i n g t h e y e a r a n d 24 t h e week o f p r o d u c t i o n .
M k 1 7 o p t i c a l s w i t c h u n i t s w e r e a l s o p r o d u c e d i n 1 9 8 0 b u t have a 17
p r e c e d i n g t h e number i . e .
17 8240.
A l l u n i t s p r o d u c e d i n 1981 a r e M k 17 w i t h numbers s i m i l a r t o 8 1 2 4 , w i t h
8 1 b e i n g t h e y e a r a n d 24 t h e week o f p r o d u c t i o n .
I n t h e e v e n t o f a n
a m b i g u o u s d a t e c o d e ( e . g .
8 1 2 0 ) c o n t a c t t h e L o t u s S e r v i c e D e p a r t m e n t f o r
a d v i c e .
R e p l a c e m e n t
I f a new power module f o r a M k 16 s y s t e m
i s r e q u i r e d , i t c a n o n l y be
r e p l a c e d w i t h a M k 17 power module i n c o n j u n c t i o n w i t h a M k 1 7 o p t i c a l
s w i t c h
.
I f a M k 1 6 o p t i c a l s w i t c h
i s
t o be r e p l a c e d , i t c a n o n l y be r e p l a c e d
w i t h a M k 17 o p t i c a l s w i t c h , w h i c h , i f t h e M k 1 6 power m o d u l e
i s t o be
.
r e t a i n e d ,
w i l l n e c e s s i t a t e t h e u s e o f c o n v e r t o r u n i t A083M6305F f i t t e d
b e t w e e n t h e M k 1 6 power module a n d M k 17 o p t i c a l s w i t c h .
AJLAAP
DEC
1986

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