KX-NS520RU, KX-NS520UC, KX-NS500RU, KX-NS500UC - Panasonic PBX Service Manual Supplement (repair manual). Page 3

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When servicing, you must confirm which service manual should be referred by the following methods.

Refer to “PNLP8531WA”

PNLP8531WA-GG

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

*1 Change of Power Supply due to the quality improvement. 
     The replacement of the POWER SUPPLY ASS'Y is recommended.  

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

Original (Old)

Power Supply Board Parts
PCB3

PNLP8531X

POWER SUPPLY ASS'Y(RTL) 

1

*1

1

X