KX-TG6621RUB, KX-TG6621RUM, KX-TG6621UAB, KX-TG6621UAM, KX-TG6621CAB, KX-TG6621CAM, KX-TG6622CAB, KX-TGA661RUB, KX-TGA661RUM (serv.man3) - Panasonic Telephone Service Manual Supplement (repair manual). Page 2

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KX-TG6621RU/KX-TG6621UA/KX-TG6621CA/KX-TG6622CA/KX-TGA661RU
1 REPLACEMENT PARTS LIST
1.1.
REFERENCE CHART
1.2.
ORIGINAL AND NEW PARTS COMPARISON LISTS
OY
KXTG6621RUB
KXTG6621RUM
KXTG6621UAB
KXTG6621UAM
KXTG6621CAB
KXTG6621CAM
KXTG6622CAB
KXTGA661RUB
KXTGA661RUM
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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