
BSI(Service Note)                                        TOSHIBA
TOSHIBA TEC CORPORATION
2-4-1, Shibakoen, Minato-ku, TOKYO, 105-8524 JAPAN
BSI No
 F99I759
SUBJECT
  Application of Substitute for Polygonal Motor of Laser Optical Unit
MODEL
CATEGORY
 Change of Parts
 DP2570: From Aug. 1999 
AH913292 (optical unit lot No: 
9803A) 
 DP3580: From Aug. 1999 
HH916600 (optical unit lot No.: 
9818A)
CONTENT
The polygonal motor in the laser optical unit has been substituted as follows due to discontinuation of 
production. (the polygonal motor is not supplied as a service part, thus the the laser optical unit has 
been changed.) 
With the polygonal motor change, the polygonal motor drive PC board (supplied as a service part) in 
which it is controlled has been changed at the same time.
DP2570
  DP2570, DP3580
FIELD APPLICATION
 Others 
FACTORY APPLICATION
Date
UNIT
 Optical
 99/09/22
DTM-F9801
Polygonal motor drive PC board
Laser optical unit

BSI No. F99I759   Page 2
If a change is made on the same
DP3580
Polygonal motor drive PC board
Laser optical unit
[Interchangeability of polygonal motor drive PC board]
There is no old and new interchangeability for the polygonal motor drive PC board. Be sure to 
use the combination when replacing.
Current laser optical unit
(Current polygonal motor) 
Current polygonal motor drive 
PC board 
New polygonal motor drive PC 
board
O: Applicable -: No applicable 
The laser optical unit in which new polygonal motor is applied can be checked by the lot Number of the 
unit. (see below) 
The display position of the lot Number is the cover area of the bottom side in the above figure. 
(Distinguishing lot No.) cf. machines made on Oct. 10, 1998 -> lot No. "8X10A"
Suffix (A,B,~) 
day, it is changed from A to B.
Date of manufacture (01, ~)
Month of manufacture (1,2 ~9,X,Y,Z)
Year of manufacture (lower 1 figure AD)
O
-
New laser optical unit 
(New polygonal motor)
-
O
[Changed/Added Part No.]
MODEL P-I Before Change After Change Note P I R FA 
DP2570 6-9B 4406391510 
DP2570 6-32B 4406391530
DP3580 6-3 4402940000 
DP3580 6-4 4402952090
ASM-OPT-222 
PWA-F-POL-222
ASM-OPT-230 
PWA-F-POL-230
4406391550 
ASM-OPT-222S 
4406394320 
PWA-F-POL222S
4402940020 
ASM-OPT-230S 
4402952270 
PWA-F-POL230S
Laser 
optical unit 
Polygonal 
motor drive 
PC board 
Laser 
optical unit 
Polygonal 
motor drive 
PC board
A
C E H C D H -
C E H C D H -

BSI No. F99I759   Page 3
P-I: Page-Item P: Contents of Change I: Interchangeability R: Reasons for Change