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KX-TDA6178X, KX-TDA6178XJ (serv.man7) - Panasonic PBX Service Manual Supplement (repair manual). Page 2

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2
KX-TDA6178X/KX-TDA6178XJ
1 CHANGES
1.1.
Subject 
KX-TDA6178X
KX-TDA6178XJ
SUFFIX LOCATION
1.2.
Replacement Parts List
NM
KXTDA6178X
KXTDA6178XJ
Suffix
Reason for suffix change
H to I
Change FETs in DC/DC converter at SLIC.
I to J
Change the Thyristor.
Suffix
Reason for suffix change
J to K
Change FETs in DC/DC converter at SLIC.
K to L
Change the Thyristor.
Suffix H - L
1HAQL123456
Serial No.
Label
(Example)
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
Remarks:
2. Change of material or dimension
3. To meet approved specification
4. Standardization
5. Addition
6. Deletion
7. Correction
8. Other
Interchangeability Code (Symbols: B) Following V-Z interchange abilities are indicated on the Notes in the bottom column.
Parts
Set Production
V Original
New
Early (before change)
Late (after change)
Original or new parts may be used in early or late production sets.
Use original parts until exhausted, then stock new parts.
W Original
New
Early (before change)
Late (after change)
Original parts may be used in early production sets only. New parts may be used in early or
late production sets. Use original parts where possible, then stock new parts.
X Original
New
Early (before change)
Late (after change)
New parts only may be used in early or late production sets.
Stock new parts.
Y Original
New
Early (before change)
Late (after change)
Original parts may be used in early production sets only. New parts may be used in late
production sets only. Stock both original and new parts.
Z Other
Ref. No.
Part No.
Part Name & Description
Pcs
Remarks
Notes
Time of change 
(Suffix)
Original (Old)
New 
X
XJ
Main Board Parts
IC602
PSWI26178XJ6
PNWI26178XJ7
IC
1
1
W
---
---
Q301A-Q301P B1CFMM000002
B1CFMM000004
TRANSISTOR(SI)
16
8
W
J
L
D304A-D304X B2ZBZ0000042
B2ZBZ0000045
DIODE(SI)
24
8
W
J
L
D305A-D305X B2ZBZ0000042
B2ZBZ0000045
DIODE(SI)
24
8
W
J
L
J8
----------
ERJ2GE0R00
RESISTOR,0Ω
1
8
Y
J
L
J9
ERJ2GE0R00
----------
RESISTOR,0Ω
0
8
Y
J
L
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