KX-TG5581RUB, KX-TGA551RUB (serv.man2) — Panasonic Telephone Service Manual Supplement (repair manual). Page 2

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KX-TG5581RUB/KX-TGA551RUB
1 REPLACEMENT PARTS LIST
1.1.
REFERENCE CHART
1.2.
ORIGINAL AND NEW PARTS COMPARISON LISTS
OY
KXTG5581RUB
KXTGA551RUB
Reason for Change
*The following items (1-8) indicate the reason for change. See the “Notes” column for each part in ORIGINAL AND NEW PARTS 
COMPARISON LISTS.
1. Improve performance
Remark:
*m:
 Discontinued (To be replaced with a new part)
2. Change of material or dimension
3. To meet approved specification
4. Standardization
5. Addition
6. Deletion
7. Correction
8. Other
Ref. No.
Part No.
Part Name & Description 
Pcs/
Set
Remarks
Notes
Time of Change
Original (Old)
New
(Suffix)
Main P.C.Board Parts (Base Unit) 
IC2
B1ZBZ0000074
B1ZBZ0000086
TRANSISTOR(SI)
1
*m
4
V
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