SERVICE BULLETIN
MA
6100
S.B. No.
1
M O D E L : MA 6100 P r e a m p - A m p l i f i e r
P U R P O S E O F M O D I F I C A T I O N : T o c o r r e c t w i r i n g e r r o r i n c o m p e n s a t i o n
and tone c o n t r o l s .
W H A T U N I T S A R E A F F E C T E D : S e r i a l No. A E 1 0 0 1 t o A E 1 1 8 4
W H E N M O D I F I C A T I O N SHOULD B E M A D E : A n y t i m e any o t h e r s e r v i c e
i s p e r f o r m e d .
M c l N T O S H M O D I F I C A T I O N K I T NO.: None
P A R T S R E Q U I R E D : None
P R O C E D U R E : (Refer t o t h e d i a g r a m o n r e v e r s e s i d e )
Step 1 Remove d u s t c o v e r , knobs & front p a n e l .
S t e p 2 I n t e r c h a n g e t h e orange and o r a n g e / w h i t e
w i r e s connected to t h e tone c o n t r o l PC B o a r d .
S t e p 3 I n t e r c h a n g e t h e brown and b r o w n / w h i t e
w i r e s connected to t h e tone c o n t r o l PC Board.
S t e p 4 Remove 4 screws from u p p e r s e c t i o n of sub
p a n e l and i n t e r c h a n g e t h e green and g r e e n / w h i t e
w i r e s c o n n e c t e d t o t h e v o l u m e c o n t r o l (R21O).
S t e p 5 R e p l a c e u p p e r s e c t i o n o f s u b p a n e l m a k i n g s u r e
to use t h e hex head screws in t h e top h o l e s
and the pan head screws in t h e lower holes .
Rep l a c e f r o n t p a n e l , knobs and d u s t cover.
Mclntosh Laboratory Incorporated 2 Chambers Street Binghamton, New York 13903 Phone: Area Code 607-723-3512
W I R I N G C H A N G E
BE042003
