Bose l1 compact portable line array system 318882 b1 d7 bull
This is the 2 pages manual for bose l1 compact portable line array system 318882 b1 d7 bull.
Read or download the pdf for free.
If you want to contribute, please mail your pdfs to info@audioservicemanuals.com.
Extracted text from bose l1 compact portable line array system 318882 b1 d7 bull (Ocr-read)
Page 1
JEEP
SERVICE B U LLETI N Bettersound through research®
Bulletin Part Number: 318882-81
Product: L1 Compact Portable Line Array System
Subject: Defective diodes from vendor
Disposition: On all L1 Compact systems built before 7/24/09 (DOM 9205)that are sent in for service, replace
Zener diodes Z1, 22 and Z7 using the following procedure.
Symptom: No symptom or dead unit.
Reason: Defective diode(s) from the part manufacturer may fail prematurely.
Solution: Perform the rework procedure below.
Rework Procedure:
1. Using the disassembly procedures in the service manual, remove the power supply / power amplifier PCB
assembly from the power stand cabinet.
2. Locate and remove zener diodes Z1, 22 and Z7. Discard.
3. Using Bose part number 325372-0018, replace Z1, 22 and Z7 with new parts. The diodes are On-Semi
1N5347B, 5W, 10V zener diodes with axial leads. Be sure to observe polarity when installing the new parts.
4. Re-install the power supply / power amplifier PCB assembly into the power stand cabinet.
5. Perform the power stand test proce-
dures located in the L1 Compact service
manual to ensure proper operation before
returning the system to the customer.
Notes:
1. Refer to the L1 Compact service
manual, 318882-SM, located on the
sen/ice web site located at
http://serviceops.bose.com for
disassembly and test procedures.
2. Refer to the board layout diagram at
right and the schematic diagram located
on page 2 of this bulletin for the locations
of Z1, Z2 and 27 in the circuit and on the
circuit board.
Date Issued: 8/09
Bose Corporation; The Mountain, Framingham, Ma. 01701-9168 page 1 of 2
Service documentation available online at http://serviceops.bose.com
Page 2
SERVICE BULLETIN
Z1 and Z7 locations
imuF/Jsv
L1 Compact schematic
section from sheet 1 of 2
TO FRE-AMP SECTION
AW 0-
saNn 07
«V
4. SCR1
A SCR2
4. SCR3
A SCR4
4. SCRS
74. SCR6
V
Z1 and Z7 locations
L1 Compact schematic
section from sheet 2 of 2
_C40
41uF/iav I m m,
013i ion
I] (:15
47W100VV3a
DPVSSP
4 0 L14 nun
7-.
Bose Corporation; The Mountain, Framingham, Ma. 01701-9168
Service documentation avaiiable online at http://serviceops.bose.com
page 2 of 2