KX-TDA6178X, KX-TDA6178XJ (serv.man2) — Panasonic PBX Service Manual Supplement (repair manual). Page 2

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2
KX-TDA6178X / KX-TDA6178XJ
1 CHANGES
1.1.
Subject 
KX-TDA6178XJ
Suffix Location
1.2.
Replacement Parts List
*1: See Section 1.1. for Suffix change.
H.M.
KXTDA6178X
KXTDA6178XJ
Suffix
Reason for suffix change
A to B
Improvement of the over current detection circuit +40V
B to C
Telepermit label addition, there is no change in the “REPLACEMENT PARTS LIST”.
C to D
A-TICK mark (for Australia) addition, there is no change in the “REPLACEMENT PARTS LIST”.
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
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)*1
Original (Old)
New 
KXTDA6178X
KXTDA6178XJ
Main Board Parts
R809
PQ4R10XJ103
PQ4R10XJ153
RESISTOR, 15k
1
8
X
B
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