KX-MB283RU, KX-MB783RU (serv.man3) - Panasonic Fax Service Manual Supplement (repair manual). Page 2

2

There are two kinds of Main Board, a new type and an old (original) type. 
The service of new type and old type Main Boards should proceed according to each respective procedure.
When replacing the Main Board or parts on the Main Board, first confirm if it is a new or old type Main Board by referring to the
table below.

OFor each type Main Board, see the contents of this supplement about the item of the table below.

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

Notes:
(*1): When Main Board is an old (original) type.
(*2): When Main Board is a NEW type.

Remarks: 
*a : To enhance the quality.
*n : To correct error writing.

2. Change of material or dimension
3. To meet approved specification
4. Standardization
5. Addition
6. Deletion
7. Correction
8. Other

Old type, PNWP1MB283RU

A

PFUP1657ZA-1

New type, PNWP1B283RU1

B or later

PFUP1657YA

Old type, PNWP1MB783RU

A

PFUP1657ZA-1

New type, PNWP1B783RU1

B or later

PFUP1657YA

R573

CN514

1

2

R534

CN509

1

4

09

CN502

C525

1

D503

L502

C671

C673

R452

C491

PbF

PFUP1657ZA-1

Q524

E

E

KX-MB283/783RU Service Manual

(Order No.KMF0804159CE)

Contents of Supplement

Main unit bareboard

Old type:

PFUP1657ZA-1

New type: 

PFUP1657YA

6. Technical Descriptions

6.6. CIS CONTROL SECTION

*1

3.1.1. CIS CONTROL SECTION  Refer to P.7

6.17. Main Board Section

*1

3.1.2. Main Board Section Refer to P.8

12.3. TROUBLESHOOTING DETAILS

12.3.22. USB SECTION

*1

3.2.1. USB SECTION Refer to P.11

12.3.23. LAN SECTION

*1

3.2.2. LAN SECTION  Refer to P.13