ER-A490 (serv.man10). A490-004 EURO Specification for Option ROM - Sharp ECR Technical Bulletin (repair manual). Page 2

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5.Parts action:
Ref.
No.
Model
name
Version
P/G No.
Current parts
New parts
Parts name
Effec-
tive
time
Inter-
change-
ability
Note
Parts code
Parts code
Price 
rank
ER-A46R1
All
VHI27010RAP1B
VHI27010RAP1D
BF
ROM
’98/9
3
ER-A49R1
VHI27010RAS1B
VHI27010RAS1D
’98/9
3
<Interchange>
1. Interchangeable.
4. Not interchangeable.
2. Current type can be used in place of new type.
New  type  cannot  be used in place  of current  type.
5. Interchangeable if replaced with same types of 
related parts in use.
3. Current  type  cannot  be used in place  of new type.
New type can be used in place of current type.
6. Others.
Parts marked with “     ” is important for maintaining the safety of the set. Be sure to replace these parts with
 
specified ones for maintaining the safety and performance of the set.
6.Other:
Supplemental documents:
<1> Coordination capabilities with the machine ROM.
<2> ROM Replacement procedures.
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