semiconductor products, health care solutions, and chemical analysis became a new company,
Agilent Technologies. Now, many
Agilent Technologies.
the
8,2000
of
November
HPWay
1,
1999,
four
of
Hewlett-Packard's businesses, test and measurement,
of
your Hewlett-Packard products and services are
agilent corn
in
the care of
At
Agilent Technologies, we are working diligently
you. However, as
shipment may be labeled with either the Hewlett-Packard name and logo, the Agilent Technologies
name and logo,
(HP), but applies to your Agilent Technologies product. Hewlett-Packard and Agilent branded
products with the same model number are interchangeable.
Whatever logo you see, the information, products, and services come from the same reliable source.
If
you have questions about Agilent Technologies products and services, please visit our website at
http://www.aqilent.com.
a
result of this transition, the products and related documentation contained in this
or
a combination of both. Information in this package may refer to Hewlett-Packard
to
make this transition
as
smooth as possible for
Sincerely,
Rebranding Team
HP
8904A
MULTIFUNCTION SYNTHESIZER
(Including Options
Service Manual
SERIAL
This
2712A
manual
serial numbers prefixed
to
2948A
For
numbers, refer
THIS
This
Government pursuant
der the clause at
and all MAJOR
additional important information about serial
MANUAL"
material may
applies directly
SEW
rev.OlJUL91
to
"INSTRUMENTS
in
Fourth
be
DFARS
001,
002,
NUMBERS
to
instruments
PREFIXES
changes
Section
reproduced by
to
that
apply to
COVERED
1.
Edition
the Copyright License
52.227-7013
003,
with
your
or
for the
(APR 1988).
U.S.
and
instrument.
BY
un-
004)
Copyright@ HEWLETT-PACKARD COMPANY
EAST 24001 MISSION AVENUE, TAF C-34, SPOKANE, WASHINGTON, U.S.A.
Service Manual HP Part 08904-90008
Other Documents Availiable:
Operation and Calibration Manual HP Part 08904-90007
Operation and Application Guide HP Part 5953-8491
Microfiche Service Manual HP Part 08904-90020
Microfiche OperationlCalibration Manual HP Part 08904-90019
1987
99220
Printed In
U.S.A.:
June
1992
HEWLETT
PACKARD
1
Regulatory
Information
(Updated March
1999)
1
Regulatory
Safety Considerations
GENERAL
This
markings and instructions before operation.
This
"Safety Requirements for Electronic Measuring Apparatus," and
safe condition.
must
condition.
SAFETY EARTH GROUND
A
uninterruptible safety earth ground must be provided from the main power source to the
product input wiring terminals, power cord, or supplied power cord set.
Information
product and related documentation must be reviewed for familiarization with safety
product
be followed by the user to ensure safe operation and to maintain the product in a safe
(Updated
has
been designed and tested in accordance with
This
March
1999)
instruction documentation contains information and warnings which
IEC
Publication
has
1010,
been supplied
in
a
SAFETY
A
Indicates instrument damage can occur if indicated operating limits are exceeded.
CAUTION note denotes a hazard. It calls attention to an operation
procedure, practice, or the like, which, if not correctly performed or adhered
to, could result in damage to or destruction
not proceed beyond an CAUTION note until the indicated conditions are fully
understood and met.
or
the like, which, if not correctly performed or adhered to,
Do
until the indicated conditions are
calls
attention to a procedure,
not proceed beyond a WARNING
fully
understood and met.
of
part or
all
of the product.
Do
2
Chapter
1
Safety Considerations for this Instrument
~
WARNING
This product is a Safety Class I instrument (provided with
protective earthing ground incorporated in the power cord). The
mains plug shall only be inserted in a socket outlet provided with a
protective earth contact. Any interruption
conductor inside
or
outside
product dangerous. Intentional interruption is prohibited.
Regulatory Information (Updated March
of
the protective
of
the product is likely to make the
1999)
a
Whenever
it
is likely that the protection has been impaired, the
instrument must be made inoperative and be secured against any
unintended operation.
If
this instrument is to be energized via an auto transformer
(for
voltage reduction), make sure the common terminal is connected to
the earth terminal
If
this product is not used as specified, the protection provided by
of
the power source.
the equipment could be impaired. This product must be used in a
normal condition (in which all means
No
operator serviceable parts in this product. Refer servicing to
qualified personnel.
To
prevent electrical shock, do not remove
for
protection are intact) only.
covers.
Servicing instructions are
for
use by qualified personnel only.
To
avoid electrical shock, do not perform any servicing unless you are
qualified to do
The opening
dangerous voltages. Disconnect the product from
while
it
is
The power cord is connected
live for
5
seconds after disconnecting the plug from its power supply.
so.
of
covers
being opened.
or
removal
of
parts is likely
to
internal capacitors that my remain
to
expose
all
voltage sources
Chapter
For
Continued protection against fire hazard, replace the line fuse(s)
only with
example, normal blow
250
V
fuse(s)
or
the same current rating and type (for
or
time delay).
Do
not use repaired fuses
short circuited fuseholders.
Always use the three-prong ac power cord supplied with this
product. Failure to ensure adequate earth grounding by not using
this cord may cause product damage.
This product is designed
Pollution Degree
INDOOR
USE
2
per
ONLY.
for
IEC
use in Installation Category
1010
and
IEC
664
respectively. FOR
This product has autoranging line voltage input, be sure the supply
voltage
1
is
within the specified range.
I1
or
and
3
Regulatory Information (Updated March
To
prevent electrical shock, disconnect instrument from mains (line)
before cleaning. Use
to
clean the external case parts.
Ventilation Requirements: When installing the product in a cabinet,
the convection into and out of the product must not be restricted.
The ambient temperature (outside the cabinet) must be less than the
maximum operating temperature
watts dissipated in the cabinet.
cabinet is greater than
used.
1999)
a
dry cloth or one slightly dampened with water
Do
not attempt to clean internally.
of
the product by
If
the total power dissipated in the
800
watts, then forced convection must be
4"
C
for
every
100
Product
CE
accompanied by
CSA - the CSA mark
-
the
Markings
CE mark
a
is
year indicated the year the design
a
registered trademark
is
a
registered trademark
of
the
European Community. A CE mark
was
proven.
of
the Canadian Standards Association.
Chapter
1
Model 8904A Contents
CONTENTS
Section
Introduction to This Section
Reference Designations and Abbreviations Used in This Manual
Replaceable
Firmware Updates (A2U12 and A2U13)
Hardware Modifications
Modification for Possible Ground Wire Shock Hazard
Modification for Output Overvoltage Protection Improvement
Modification for Potential Power Supply Short
8
.
Service
.............................................
....................................
............................
...............................
........................
......................
.......................
6.1
6.1
6.1
6.1
6.2
6.2
7.1
7.1
7.1
7.8
7.8
7.9
7-13
7-14
Introduction to This Section
How the Section is Organized
Safety Considerations
Before Applying Power
Safety
Service Tools, Helps, and Information
Printed Circuit Board Extractor
Assembly, Parts. and Cable Locations
Other Service Documents
Recommended
Schematic Symbology and Schematic Diagram Notes
Principles of Operation
This section contains information for ordering parts. Table 6- 1 lists reference designations, and
Table 6-2 lists abbreviations that are used in the Replaceable
parts in the instrument. Table 6-4 contains the names and addresses that correspond
manufacturer’s code numbers listed in Table 6-3.
in identifying and ordering chassis mounted parts and mechanical parts.
6-2.
REFERENCE DESIGNATIONS AND ABBREVIATIONS
Table 6-1 lists the reference designation letters
designations found in Table 6-1 are coupled with numeric designations to provide a unique reference
designation for each part in the instrument.
particular resistor
Table 6-2 lists abbreviations used in the parts list and on schematics.
6-3.
REPLACEABLE PARTS LIST
R1
on assembly A3. Designators with no letter are mechanical parts.
For
6
Parts
List. Table 6-3 lists all replaceable
Also
included in this section are drawings to aid
USED
for
electrical
example A3R1
IN
THIS
parts
in the instrument. The letter
is
the reference designation
MANUAL
to
the
of
a
Table 6-3 is a list
a. Electrical assemblies and their components with reference designations in alphanumeric order.
b. Chassis-mounted parts with reference designations in alphanumeric order.
c. Mechanical parts with reference designations
Ordering
Parts.
Instrument Serial Numbers.
Attached to the rear
are the instrument serial-number prefix. The last five digits (serial-number suffix) are unique to each
instrument. When parts in the instrument are changed, the serial-number prefix of the instrument may
also change. This means that sometimes a part will be listed more than once in the the replaceable
parts list along with a serial-number prefix
prefix on the serial plate of your instrument and order the part listed under the corresponding prefix
in the table. If no serial prefix information is listed, the part is compatible in instruments of all serial
numbers.
of
replaceable parts and is organized as follows:
in
numeric order.
of
the instrument is a serial-number plate. The first four digits and the letter
or
range of serial-number prefixes. Find the serial-number
NOTE
It is possible that some assemblies
or
(through service
serial-number prefixes later than that shown on
number tag. Be sure to note the printed circuit board number
being repaired
retrofitting) to reflect changes made to instruments with
or
replaced when ordering parts
in
your instrument have been updated
your
instrument serial-
for
your
instrument.
of
the
assembly
6-
1
Replaceable
Parts
How
to
Order
Model
8904A
To order a part in the Replaceable
Have the following information ready
1.
The Hewlett-Packard
timely processing of your order.)
2.
The quantity required.
3.
An
approved purchase order number. (Sometimes required.)
Within the
Mater& Organization, RoseviUe, California.
for
information
part
USA,
Parts
List,
call
to
speed the ordering process:
number with the check
it
is
better to order directly
and
form
for
the uDirect Order Systems.
or write the nearest Hewlett-Packard Sales Office.
digit.
NOTE
Replaceable Parts List Updating (Manual Updates)
A
“MANUAL
current information available
addition pages which should be incorporated into the
Hewlett-Packard offers a Documentation Update Service
as
they become available.
recommend that
information, refer
Technical Writing Department
UPDATES‘ packet
If
you operate or service instruments
you
join this service immediately
to
the Documentation Update Service reply card included
is
at
the time of shipment. These packets consist of replacement and
(509) 922-4001,
shipped with the manual, when necessary,
manual
that
to
ensure that you
(The check
from
Ask
your
to
bring
will
provide you with further updates
of
different
manual
digit
the
HP
nearest
it
up
to
serial
will
ensure accurate and
Support
HP
office
to
provide the most
date.
prefixes, we strongly
is
kept current. For more
in
this
manual,
or calk
or
write:
Hewlett-Packard
Technical Writing Department
24001
Spokane, WA
6-4.
MECHANICAL AND CHASSIS PART LOCATIONS AND REFERENCE DESIGNATIONS
Most mechanical parts are identified in Figures
this section. To find the part number and description of
drawings, and then look up the item number in Table
Miscellaneous
E.
Mission
Parts
Company
-
TAF
C-34
99220
toward the end of Table
6-1
6-3).
to
6-6.
These
a
mechanical part,
6-3
(mechanical
figures
are located
find
part
numbers are listed under
the part
at
the end of
in
one of the
6-2
rev.15FEB88
Model
8904A
Replaceable
Parts
A
AT
........
.
.....
attenuator; isolator;
.............
B
..
................
BT
.
..............
c
..
...............
CP
.
CR
.
...........
thyristor: varactor
......
DC
.
DL
.
,
..............
...........
DS
.
signaling device
(audible or visual);
lamp; LED
ac
........
ACCESS
ADJ
AID
AL
ALC
APC
ASSY
AUX
avg
AWG American wire
BAL
BCD
BD
BECU
BFO
BKDN
BP
BPF
BRS
BWO
CAL
ccw
CER
CHAN
cm
..............
CMO
COAX
alternating current
.........
............
........
..............
.........
control
amplitude modulation
...........
.......
control
............
..............
. .....
...............
..........
decimal
.................
......
.........
..........
..............
.........
................
.......
oscillator
..............
.......
counter-clockwise
..............
.............
.....
cabinet mount only
..............
assembly
termination
fan: motor
battery
capacitor
coupler
diode; diode
directional coupler
delay line
annunciator:
accessory
adjustment
analog-to-digital
aluminum
automatic level
amplifier
automatic phase
assembly
auxiliary
average
balance
binary coded
beryllium copper
backware-wave
board
beat frequency
breakdown
bandpass
bandpass filter
brass
calibrate
ceramic
channel
centimeter
coaxial
nable
REFERENCE DESIGNATIONS
E
............
F
....................
FL
...................
................
H
...............
HY
J
........
K
...................
L
.............
..................
M
..........
MP
miscellaneous
electrical part
electrical connector
(stationary portion);
jack
miscellaneous
mechanical part
Table
COEF
...........
COM
.............
COMP
.........
COMPL
...........
CONN
...........
CP
..........
CRT
.......
CTL
.........
CW
........
..............
cw
..............
cm
........
D/A
dB
.................
dBm
........
dc
............
deg
.....
...'
...........
OC
..........
........
OF
OK
...........
DEPC
DET
..............
diam
..............
.......
DIA
DlFF
AMPL
div
................
..........
DPDT
DR
..................
DSB
.......
........
DTL
DVM
.......
........
ECL
EMF
.....
cadmium plate
cathode-ray tube
complementary
transistor logic
continuous wave
digital-to-analog
decibel referred
to 1 mW
direct current
degree (temperature
interval or difference)
degree (plane
angle)
degree Celsius
(centigrade)
degree Fahrenheit
.....
degree Kelvin
deposited carbon
diameter (used in
parts list)
......
amplifier
double-throw
double sideband
diode transistor
logic
digital voltmeter
emitter coupled
logic
electromotive force
6-1.
Reference Designations
P
.......
fuse
filter
hardware
circulator
relay
coil; inductor
meter
6-2.
Q
..........
R
.................
RT
S
..................
..............
T
TB
TC
TP
...............
Abbreviations
ABBREVIATIONS
coefficient
common
composition
complete
connector
clockwise
centimeter
decibel
detector
diameter
differential
division
double-pole,
drive
EDP
ELECT
ENCAP
EXT
F
...................
FET
FM
FP
FREQ
FXD
g
...................
.............
GE
GHz
GL
..................
GRD
....
H
....
h
HET
HEX
HD
IiF
..........
HG
...................
HI
.........
HP
HPF
HR
HV
..................
Hz
IC
.........
..........
ID
IF
.............
IMPG
............
in
INCL
INP..
INS
electrical connector
(movable portion);
Plug
transistor; SCR;
triode thyristor; FET
..............
..........
...........
(1
.........
processing
..........
........
...............
....
field-effect transistor
....
frequency modulation
.............
............
.................
............
............
._ . .
.............
..................
...............
.........
...........
............
..............
Hewlett-Packard
parts list)
integrated circuit
frequency
..........
.............
................
resistor
thermistor
switch
transformer
terminal board
thermocouple
test point
of
2)
electronic data
electrolytic
encapsulated
external
.......
flip-flop
front panel
frequency
gram
germanium
.gigahertz
glass
ground(ed)
......
henry
.......
heterodyne
hexagonal
head
high frequency
mercury
high pass filter
hour (used in
high voltage
Hertz
inside diameter
intermediate
impregnated
incandescent
include(s)
input
insulation
farad
fixed
hour
high
U
.........
V
.............
VR
........
.......
W
X
..................
Y
........
2
........
INT
................
................
kg
k
..................
.................
kV
..................
Ib
.............
LC
LED
LH
...............
LIM
.......
LIN
LK WASH
LO
......
LOG
log
'
LPF
LV
.
m
..........
.............
mA
MAX
M
................
MEG
MET FLM
MET
OX
......
MF
...............
mg
mH
..............
mho
...........
min
..........
MlNAT
..............
mm
integrated circuit;
microcircuit
voltage regulator;
breakdown
cable: transmission
path; wire
crystal unit (piezo-
electric or quartz)
tuned cavity; tuned
circuit
capacitance
.....
light-emitting diode
..................
linear taper (used
in parts list)
......
low;
.......
local
logarithmic taper
(used in parts list)
...
.
low pass filter
...
meter (distance)
.............
.......
meg
in parts list)
........
......
metallic oxide
medium frequency;
microfarad (used
manufacturer
.................
minute (plane angle)
...........
electron tube
diode
socket
internal
kilogram
kilohm
kilovolt
pound
inductance-
left
hand
limit
lock washer
oscillator
lcgarithm(ic)
low voltage
milliampere
maximum
megohm
(lo6)
(used
metal film
in
milligram
millihenry
mho
minute (time)
miniature
millimeter
All abbreviations
NOTE
in
the parts list will
b%
in upper-case.
6-3
Replaceable
MOM
mV
mVac
mVpp
mVrms
mW
MUX
MY
&
pF
pH
pV
pVac
pVdc
@Vpk
pVp-p
pvrms
pW
N/O
NOM
NORM
NPN negative-positive-
NPO
NRFR
NSR
ns
nW
OBD
Parts
MOD
....
...........
device)
................
...........
.......
to-peak
.........
...............
.............
.................
............
..............
.............
...............
..........
..........
........
..............
..........
..............
.......
.........
.............
.....
....
microvolt. peak
.......
microvolt, peak-
to-peak
........
.............
negative-positive
zero (zero temperature coefficient)
.....
not recommended
for field replacement
replaceable
order by description
modulator
momentary
millivolt
millivolt, ac
millivolt, peak-
millivolt, rms
milliwan
multiplex
mylar
microampere
microfarad
microhenry
microvolt
microvolt, ac
microvolt, dc
microvolt, rms
microwatt
normally open
nominal
normal
not separately
nanosecond
...
nanowatt
Table
6-2.
OD
........
OH
..............
OP AMPL
OX..
outside diameter
.......
amplifier
operational
.........
.......
................
......
peak
(used
........
PAM
...........
PC
PCM
PDM
.........
pF ...............
PH
BRZ
PHL
...............
PIN
........
PLO
....
PM
.......
PNP
P/O
................
POLY
PORC
. , . , .
POS
POSN
p-p
...........
PPM
PREAMPL
PRF
........
PRR
ps
.............
..................
PT
PTM
PWM
pulse-amplitude
modulation
....
......
..........
............
.............
.........
....
printed circuit
pulse-code modulation; pulse-count
modulation
pulse-duration
modulation
....
phosphor bronze
positive-intrinsic-
negative
phase lock oscillator
phase modulation
positive-negative-
positive
polystyrene
positive: position(s)
(used in parts list)
peak-to-peak
in parts list)
pulse-position
modulation
......
preamplifier
pulse-repetition
frequency
pulse repetition rate
picosecond
............
modulation
...........
modulation
pulse-width
Abbreviations
oval head
option
oscillator
oxide
ounce
in parts
picofarad
Phillips
ltage
peak
lock
part of
porcelain
position
point
pulse-time
(2
of
2)
RECT
..............
REG
.............
..........
REPL
RH
RLC
RMO
rms
RND
ROM
R&P
RWV
S
S
...
S-B
SCR
SE
SECT
SI
SIL..
SL
SNR
SPDT
SPG
SR
SPST single-pole,
SS ...........
SSB
STL
SWR
SYNC
T
TA tantalum
TC
interference
...
round head; right hand
.............
inductancecapacitance
.......
.......
root-mean-square
................
.....
read-only memory
.........
.......
voltage
........
(used
.......
silicon controlled
rectifier; screw
...............
.............
..................
................
...................
....
signal-to-noise ratio
..........
double-throw
................
...............
........
.........
....
standing-wave ratio
..........
.....
timed (slow-blow fuse)
............
compensating
rectifier
....
reference
regulated
replaceable
resistance-
rack mount only
round
rack and panel
reverse working
ng parameter
second (time)
(plane angle)
slow-blow (fuse)
in
parts list)
selenium
sections
silicon
silver
slide
single-pole,
spring
splitring
W
Service Sheet
single sideband
synchronize
temperature
Model
TD
..............
.............
TERM
TFT
......
................
TGL toggle
THD
................
THRU
.............
.................
TI
TOL
.............
TTL
.....
transistor-transistor
N
TVI
TWT
U
UF
UHF
UNDEF
UNFEG
v
VA
Vac
VAR
VCO
Vdc
VDCW
VHF
Vrms
VSWR
VTO
VTVM
V(X)
w..
wl
WIV
WW
W/O
logic
...............
....
television interference
.....
traveling wave tube
........
in
parts list)
......
microfarad (used in
parts list)
.....
ultrahigh frequency
..........
........
.....................
.............
...............
...............
......
oscillator
...............
.....
(used
oscillator
.....
very-high frequency
............
......
wave ratio
...........
oscillator
.........
voltmeter
.........
..................
...................
........
voltage
............
...............
YIG
......
Z,
...........
impedance
time delay
thin-film transistor
micro (used
voltage-controlled
volts, dc, working
yttrium-iron-garnet
terminal
thread
through
titanium
tolerance
television
undefined
unregulated
volt
voltampere
volts, ac
variable
volts, dc
in
parts list)
volts, rms
voltage standing
voltage-tune
vacuum-tube
volts, switched
working inverse
characteristic
wan
with
wirewound
without
8904A
6-4
NOTE
All abbreviations in the parts list will
MULTIPLIERS
Abbreviation
T
G
M
k
da
d
C
m
P
n
P
f
a
Prefix
tera
gigs
mega
kilo
deka
deci
centi
milli
micro
nano
pic0
femto
ano
CAPACITOR-FXD 150PF +-5% POOVDC CER
NOT ASSIGNED
CAPACITOR-FXD 6.8UF+-1Oo/o 35VDC TA
CAPACITOR-FXD 6.8UF+-1O0/- 35VDC TA
CAPACITOR-FXD 6.8UF+-llW 35VDC TA