HP 
8903B 
AUDIO 
ANALYZER 
(Including Option 
001) 
Service 
Manual 
SERIAL 
NUMBERS 
This 
manual  applies directly 
to 
instruments with 
serial numbers prefked 
24508 
to 
2948A and 
all 
MAJOR 
changes 
that 
apply to your instrument. 
rev. 
20 
JUN91 
For 
additional important information about serial 
numbers, refer 
to 
"INSTRUMENTS 
COVERED 
BY 
THIS 
MANUAL'' 
in 
Section 
1. 
Fifth 
Edition 
This 
material may be reproduced by 
or 
for the 
US. 
Government pursuant 
to 
the Copyright License 
un- 
der the clause 
at 
DFARS 
52.227-7013 
(APR 
1988). 
CopyrightOHEWLETT-PACKARD 
COMPANY 
1985 
EAST 
24001 
MISSION AVENUE, TAF 
C34, 
SPOKANE, WASHINGTON, U.S.A. 
99220 
Service Manual (Volume 
1,2) 
HP Part 08903-90062 
Other Documents Available: 
Operation 
and 
Calibration 
Manual 
(Volume 
1) 
HP 
Part 08903-90079 
Microfiche operation and Calibration and Service Manual HP Part 08903-90080 
Printed 
in 
U.S.A. 
: 
July 
1993 
HEWLETT 
PACKARD