HP 8690B User manual

MANUAl
CHANGES
.-MANUAl IDENTIFICATION-
Model Number: 8690B
Date Printed: May 1972
Part Number: 08690-90018
This supplement contains important information for correcting manual errors and for adapting the manual to
instruments containing improvements made after the printing of the manual.
To use this supplement:
Make
all ERRATA corrections
Make
all appropriate serial number related changes indicated in the tables below.
_Serial Prefix or Number __ Make Manual Changes_ _ Serial Prefix or Number-,.-- Make Manual Changes_
1114A
1,2 1349A04586 thru
1124A 1 3 1349A05215 1
3-9
1143A02906 thru 1349A05216 thru 1,
3-10
1143A03055 1,2,4,5
1349A05275
1202A03056 thru 1445A 1, 3-11
1202A04045 1,
3-6
1202A04046 thru
""" 1513A05426 thru
1202A04345 1,
3-7
1513A05545 1, 3-12
1202A04346 thru 1513A05546 thru
1202A04585 1
3-8
~ 1513A prefix 1,
3-13
.... NEW ITEM
ERRATA
1111>-Inside front cover:
Insert new information regarding SAFETY, CERTIFICATION, and WARRANTY AND ASSISTANCE
immediately inside front cover of manual (new information sheet supplied in this Manual Changes
Supplement).
...,_Page 1-1, General Information:
Add the following information preceding Paragraph 1-1:
1-A. SAFETY CONSIDERATIONS
General
This instrument has been designed and tested
according to IEC Publication 348, "Safety
Requirements for Electronic Measuring Appa-
ratus," and has been supplied in safe condition.
This is a Safety Class I instrument.
Operation
BEFORE APPLYING POWER, make surethe
instrument's ac input is set for the available
ac line voltage,
that the correct fuse is installed,
and that all normal safety precautions have
been taken.
Service
Although the instrument has been designed in
Manual change supplements are revised as often as necessary to keep manuals as current and accurate as possible.
Hewlett-Packard recommends that you periodically request the latest edition of this supplement. Free copies are available
from all HP offices. When requesting copies quote the manual identification information from your supplement, or the model
number and print date from the title page of the manual.
1 MAY 1975
HEWLETT
PACKARD
15 Pages
Printe in U.S.A.

Model8690B
ERRATA (Cont'd)
accordance with international safety standards, the
information, cautions, and warnings in this manual
must be followed to ensure safe operation and to
keep the instrument safe. Service and adjustments
should be performed only by qualified service
personnel.
Adjustment or repair of the opened instrument
with the ac power connected should be avoided
as
much as possible and, when inevitable, should be
performed only by a skilled person who knows
the hazard involved.
Capacitors inside the instrument may still be
charged even though the instrument has been
disconnected from its source of supply.
Make
sure only fuses of the required current rat-
ing
and type (normal blow, time delay, etc.)
are used for replacement. Do not use rep,aired
fuses or short circuit the fuse holders.
Whenever
it is likely that the protection has been
4mpaired, make the instrument inoperative and
secure it against any unintended operation.
I WARNING I
If this instrument is to be energized through an
autotransformer (for voltage reduction), make sure
the common terminal is connected to the earthed
pole of the power source.
BEFORE SWITCHING ON THE INSTRUMENT,
the protective earth terminals of the instrument
must be connected to the protective conductor of
the mains power cord. The mains plug shall only
be inserted in a socket outlet provided with pro-
tective earth contact. The protection must not be
08690-90018
negated by using an extension cord (power cable)
without a protective grounding conductor.
Any interruption of the protective (grounding)
conductor, inside or outside the instrument, or
disconnection of the protective earth terminal is
likely
to make this instrument dangerous. Inten-
tional interruption of the earth ground is prohibited.
Servicing this instrument often requires that you
work with the instrument's protective covers re-
moved and with ac power connected. Be very care-
ful;
the energy at many points in the instrument
may, if contacted, cause personal injury.
With
the ac power cable connected, the ac line
voltage
is present at the terminals of the power line
module and at the LINE power switch. Be very
careful.
Bodily contact with this voltage can be
fatal.
BEFORE SWITCHING ON THIS INSTRUMENT,
make sure instrument's ac input is set to the
voltage of the ac power source.
BEFORE SWITCHING ON THIS INSTRUMENT,
mqke sure that all devices connected to the instru-
ment are connected to the protective earth ground.
BEFORE SWITCHING ON THIS INSTRUMENT,
make sure the line power (mains) plug is connected
to a three-conductor line power outlet that has a
protective (earth) ground. (Grounding one con-
ductor of a two-conductor outlet is not sufficient.
BEFORE SWITCHING ON THIS INSTRUMENT,
make sure the ac line fuse is of the required
current rating and type (normal-blow, time-delay,
etc.).
2
HEWLETT~ PACKARD

08690-90018
3
SAFETY
This instrument has been designed and tested according to IEC Publication 348,
"Safety Requirements for Electronic Measuring apparatus," and has been supplied in
safecondition.
This is a SafetyClassI instrument. To ensure safeoperation and to keep
the
instrument safe, the information, cautions, and warnings in this manual must be
heeded. Refer to Section I for general safety considerations applicable to this instru-
ment.
CERTIFICATION
The Hewlett-Packard Company certifies that this instrument was thoroughly tested
and inspected and found to meet its published specifications when it was shippedfrom
the factory.
The Hewlett-Packard Company further certifies that its calibration meas-
urements are traceable to the U.S. NationalBureau of Standards to the extentallowed
by the Bureau's calibration facilities, or
to the calibration facilities of other Interna-
tional
Standards Organization members. '
WARRANTY AND ASSISTANCE
This Hewlett-Packard product is warranted against defects in materials and work-
manship. This warranty applies for one year from the date of delivery. Hewlett-
Packard will repairorreplaceproducts whichprove to be defective during the warranty
periodprovided they are returned
to Hewlett-Packard. No other warranty is expressed
or implied. We are not liable for consequential damages.
Servicecontracts orcustomerassistanceagreements are available for Hewlett-Packard
products
that require maintenance and repair on-site.
For any assistance, contact
your nearest Hewlett-Packard Sales and Service Office.
HEWLETT~ PACKARD
Model 8690B

ModelS690B
ERRATA (Cont'd)
Page 6-2, Table 6-1:
Change A2C3 to
HP Part No. 0160-2675 C: FXD MICA 3900 pF 1%300 VtJCW, Factory selected pi:u~t.
Change A2R8 to HP Part No. 2100-0672 R: VAR COMP 2K OHM 20% LIN l/2W
A2R19 to BP Part No. 2100-0674 R: vAR COMP 2oK dliM 2o% LIN 1/2W
A2R22 to
HP Part No. 2100-0~73 R: VAR coMP 5K OHM 20% LIN 1/2W
A2R23 to HP Part No. 2100-0673 R: VAR c()Mf> 5k OHM 20% LIN 1/2W
A2R24 to
HP P~rt No. 2100-0673 R: VAk cdMP 5k oHM 20% LI~ iJ2W
A2R25 to HP Part No. 2100-0672 R: VAR COMP 2K. OHl\120% LIN 1/2W
A2R28 to
HP Part No. 2100-0676 R: VAR cdMP 50K OHM 20% LIN i/2w
Page 6-3, Table 6-1: ... . . .. . , .· •.......· •. . .· ..•. •.••. ·.··· .. ·.. . . •. .
Change A2R30 to HP Part No. 2~00-0673 R: VAR COMP 5k OH1fi ~0% LIN 1/2Yl
A2R31 to HP Part No. 2100-0673 R: VAR COMP 5k OHM 20% LIN 1/2W
Page 6-4, Table 6-1:
Change A3R53 to HP Part No. 2100-0674 R: VAR
COMP 20K OHM 20% Ll~ 1?ifv.
lillo-Page 6-7, Table 6-1: . . . . . .
Add A4XV6 HP Part No. 1200-0062 SOCKET:TUBE 9 PIN.
l!lo-Page 6-10, Table 6-1:
Add A8XV2 and A8XV3
HP Part No. 1200-Cl053 SdCKET:TUBE 7 PIN.
Page 6-11, Table 6-1:
Add A9MP1, MP2,
HP Part No. 1205-0011 Heat Sink.
Page 6-13, Table 6-1:
Change A11R2 to HP Part No. 2l00-0675 R: V AR c()MP .25K OHM 20% LIN l/2W
A11R8 to HP Part No. 0757-0128 R: FXD MET FLM 200K OHM 1% w/2W
A11R18 to HP Part No. 2100-0675 R: VAR COMP 25K diiM 2b% LfN 1/2W
Jllio-Page 6-14, Table 6-1:
Add A12XV1
HP Part No. 1200-0062 SOCKET:TUBE 9 PiN
Page 6-15, Table 6-1: ... · .. · .. ·• ...... · .. · •·· ·.··· ·.· .. ·.· ,
Change
B1 to HP Part No. 3160-0056 recommended repla.cemerit. .··
Change C1 and C2 to HP Part No. 0160-0669 C: FXD Mylar 2 rnf ±10% 2ooo VDCW
Page 6-16, Table 6-1: ... . . . •· .. ·
Change F1 to
HP Part No. 2100,0420 FUSE 0.032A 250V
....
Page 6-17, Table 6-1:
Change XF1 and XF2 toHP P~rt No~ 2110-0464
Add HP Part No. 2110-0465 FUSEHOLDER.cAP
Add HP Part No. 2100-0467 NUT-HEX 1/2-28
Add
HP Part No. 7120-4162 LABE~, INFO QTY 2
Add
HP Part No. 7120-4163 LABEL INFO QTY 1
Page 6-18, Table 6-1:
..,. Change HP Part No. 1400-0084 to:
HP Part No. 2110~0464 FUSEHOLDER
l!lo- Add HP Part No. 2110-0465 FUSEHOLDER CAP
.... Add HP Part No. 2110-0467 NUT-HEX 1/2~28
HEWLETT PACKARD
os69h.9dnis
4

08690-90018
ERRATA (Cont'd)
Add the following:
A3
HP Part No. 08690-60066 Replacement Kit Reciprocal Amplifier Board Assembly
A4 HP Part No. 08690-60063 Replacement Kit Helix Amplifier Board Assembly
A5 HP Part No. 08690-60065 Replacement Kit Low Voltage Power Supply Board Assembly
A6 HP Part No. 08690-60064 Replacement Kit Regulator Board Assembly
Model 8690B
AS HP Part No. 08690-60071 Replacement Kit High Voltage Power Supply Board Assembly (not pretested)
A9
HP Part No. 08690-60061 Replacement Kit Rectifier Board Assembly (not pretested)
A10 HP Part No. 08690-60059 Replacement Kit Sweep Generator Board Assembly
A12
HP Part No. 08690-60062 Replacement Kit ALC Amplifier Board Assembly
..,._Page 6-23, Table 6-2:
Change HP Part No. 1400-0084 to:
HP Part No. 2110-0464 FUSEHOLDER
Page 7-3, Figure 7-2:
Change switch labeling
as shown below:
ss 53
,;F I FUNCTION I
MS
R4
681K
I MANUAL I
[f[fQJ
\
\
\
\
\ ~
~(
/ \
VERNIER
0
~/!LINE SYNC!
/ 0
~ / \
', -300V
\
\
\ 0 \
\ \
\ \
\
\
\
' ------• S9F
'--- 0 !SWEEP SELECTOR!
Page 7-5, Figure 7-3:
5
Change the A3 Assembly Component Identification Photo indicate R77 and R78 designations are swapped.
Change F1
to 0.032A
Change the A3 Assembly Resistor Reference Designations to read R30-34, 40-45, 47-80.
Change the circuitry of A3Q1 as shown in the attached drawing:
R47*
1620
R79 R80
51. 1K !OK
C40
0. 1
G
01
1855·0062
P/0 Figure 7-3. Frequency Control Section Reciprocal Amplifier
-
HEWLETT li PACKARD

Model8690B
08690-90018
ERRATA (cont'd)
Page 7-14 and 7-16, Component Identification, Assembly A9:
Substitute the attached A9 Component Identification board for
that shown in the 8690B Manual.
SHIELDED
Component Identification, Assembly A9
Page 7-15, Figure 7-8:
Change the wire color code
of the wire between XA14 pin 6 and A9CR2, from @ to(D.
The wire color code of the wire at T2 pin 13, 26 V AC winding, is ( 913 ) .
HEWLETT
PACKARD
6

ModelS690B
CHANGE 1
Page 5-17, Table 5-4, Power Supply Adjustment:
Change the power supply adjustment sequence.
.as indicated below:
Old Adjustment Sequence New Adjustment Sequence
a, b, c, d, e, f, g, h, i. a, b, c, f, g, h, i, d, e
Page 6-4, Table 6-1:
Add diodes A3CR56, A3CR57 and A3CR5S,
HP Part No. 1901-0033 DIODE: SILICON 100 rnA 1SO WV.
Page 6-6, Table 6-1:
Add diode
A4CR11, HP Part No. 1902-3400 DIODE: BREAKDOWN 7S.7V 2%400 mW.
Change resistors A10R17/A10R1S to HP Part No. 069S-3136 R: FXD 17.SK 1% 1/SW.
Page 6-10, Table 6-1:
Change AS Assy
to HP Part No. OS690-60053.
Add ASQ2 HP Part No. 1SS4-0073 THYRISTOR, SCR.
Add Resistor ASRi5 HP Part No. 0757-1000 R: FXD MET FLM 51.1 OHM 1% 1/2W.
Add Resistor ASR16
HP Part No. 0757-02SO R: FXD MET FLM l.OK OHM 1% 1/SW.
Change Capacitor ASC6 to HP Part No. 01S0-01S3 C: FXD ELECT 10 UF +75 -10%50 VDCW.
Change ASQ1 to HP Part No. 1S55-0010 UNIJUNCTION: SILICON.
Change Resistor ASR13
to HP Part No. 069S-434S R: FXD MET FLM 4.99M OHM 1% 1/2W.
Change Resistor ASR14
to HP Part No. 069S-3444 R: FXD MET FLM 316 OHM 1% 1/SW.
Page 6-11, Table 6-1:
OS690-9001S
Change Transistors A10Q3 and A10Q4 to HP Part No. 1S53-0020 TRANSISTOR: PNP SILICON (Recommended replace-
ment for 1S50-0062).
Pages 6-12, and 6-13, Table 6-1:
Add diode A11CR19
HP Part No. 1901-0033 DIODE: SILICON 100 rnA 1SO WV.
Change Transistors Al1Q2, A.l1Q3, A11Q4, A11Q6, A11Q7, AllQS and AllQll to HP Part No. 1S53-0020 TRANSIS-
TOR: PNP SILICON (Recommended replacement for 1S50-0062).
Page 6-16, Table 6-1:
Add chassis mounted diodes CR6 and CR7 HP Part No. 1901-0033 DIODE: SILICON 100 MA 1SO WV.
Change chassis mounted Fuse F3 to HP Part No. 2110-0002 FUSE: 2A, 250V.
Change chassis mounted Fuse F4 to HP Part No. 2110-0036 FUSE: SA 125V.
Page 6-17, Table 6-1:
Add chassis
mounted resistor R26 HP Part No. OS12-0019 R: FXD WW 0.33 OHM 5% 3W.
Add chassis mounted resistor R27 HP Part No. OS12-0020 R: FXD WW 0.39 OHM 5% 3W.
Page 7-3/7-4, Figure 7-2:
Change A10Q3 and A10 Q4
to HP Part No. 1S53-0020 (Recommended replacement for 1S50-0062).
Change value of resistors A10R17/A10R1S to 17.SK ohms.
Page 7-5, Figure 7-3:
Add diode A3CR56. (Connect anode
to source of A3Q2A and cathode to emitter of A3Q3.)
Add diode A3CR57. (Connect anode
to source of A3Q2B and cathode to emitter of A3Q4.)
Add diode A3CR5S. (Connect anode
to base of A3Q5 and cathode to emitter of A3Q5.)
Change
the A3 column of REFERENCE DESIGNATIONS Table to include diodes A3CR56, A3CR57 and A3CR5S.
Substitute the attached Component Identification Assembly A3 board photo (Figure 5) for the photo shown in the manual.
HEWLETT i PACKARD
7

Model 8690B
CHANGE 1 (cont'd)
Pages 7-9/7-10, Figure 7-5:
Substitute the attached
AS Assy board photo (Figure 3) for the photo shown in the manual.
Add 78.7V breakdown diode A4CR11. (Connect anode to ground and cathode to A4R34, A4C8 junction.)
Change the A4 column of REFERENCE DESIGNATIONS Table to inclUde diode A4CR11.
Pages 7-11/7-12, Figure 7-6:
Change Transistors A11Q2, A11Q3, A11Q4, A11Q6, A11Q7, AllQS and A11Q11 to HP Part Number 1853-0020. (Recom-
mended replacement for 1850-0062).
Add diode A11CR19. (Connect anode
to base of A11Q11 and cathode to emitter 'Of A11Q11.)
Add chassis mounted diode CR6. (Connect anode
to center conductor of MARKER output jack and cathode to ground.)
Add chassis mounted diode CR7. (Connect an'ode
to center conductor of BLANKING output jack and cathode to ground.)
Change All column of REFERENCE DESIGNATIONS Table to include diode A11tlR19.
Change chassis mounted component column (no heading)
of REFERENCE DESIGNATIONS Table to include diodes CR6
and CR7.
Page 7-14: . . .
Substitute the attached
AS Assy, Component Identification board photo (Fi'gure 1) for the photo shoWn in the 8690B Manual.
CHANGE2
Pages 6-14 and 6-15, Table 6-1:
Change A14 Heater Supply Assy to HP Part Number 08690-60054 (New board),
Add the following A14 Assy Components (Parts list for new A14 Assy).
C1 0160-3534 C: FXD MICA 510 PF 5% 100 VDCW.
C3 0180-0089
C4 0160-3539
C5 0180-0141
C6 0160-2205
C7 0180-0094
CR1 1902-0041
CR2 1901-0025
CR3 1901-0025
CR4 1901-0025
IC1 1820-0196
IC2 1820-0196
IC3 1820-0196
Q1 1854-0062
R1 0757-0418
R2 0757-0440
R3 0757-0438
R4 0757-0461
R5 0757-0473
R6 0757-0401
R7 0757-0416
R8 0698-3156
R9 0757-0447
R10 2100-1759
Rll 0757-0441
R12 0757-0199
R13 0698-3154
R14 0757-0416
R15 0757-0280
R16 0757-0289
R17 0698-3152
C: FXD ELECT 10 UF -10% +1QO% 150 VDCW.
C: FXD MICA 820 PF 5% 100 VDCW.
C: FXD ELECT 50 UF +75 -10%50 VDCW.
C: FXD MICA 120 PF 5%.
C: FXD ELECT 100 UF 25 VDCW.
DIODE, BREAKDOWN: 5.11V 5%400 mW.
DIODE, SILICON 100 MA/1V.
DIODE, SILICON 100 MA/1V
DIODE; SILICON 100 mA/1
V.
IC: VOLTAGE REGULATOR.
IC: VOLTAGE REGULATOR.
IC: VOLTAGE REGULATOR.
TRANSISTOR: SILICON NPN.
R: FXD MET FLM 619 OHM 1% 1/SW.
R: FXD MET FLM 7.5K OHM 1% 1/SW.
R: FXD MET FLM 5.11K OHM 1% 1/SW.
R: FXD MET FLM 68.1K OHM 1% 1/8W~
R: FXD MET FLM 221K OHM 1% 1/8W.
R: FXD MET FLM 100
OHM 1% 1/8W.
R: FXD MET FLM 511
OHM 1% 1/8W.
R: FXD MET FLM 14.7K OHM 1% 1/SW.
R: FXD MET FLM 16.2K OHM 1% 1/8W.
R: VAR
WW 2K OHM 10% LIN 1/2W.
R: FXD MET FLM 8.25K
OHM 1% 1/SW.
R: FXD MET FLM 21.5K OHM 1% 1/SW.
R: FXD MET FLM 4.22K OHM 1% 1/SW.
R: FXD MET FLM 511 OHM 1% 1/SW.
R: FXD MET FLM l.OK OHM 1% 1/SW.
R: FXD MET FLM 13.3K OHM 1% 1/SW.
R: FXD MET FLM 3.48K OHM 1% 1/SW.
HEWLETT
PACKARD
8

Modei8690B 08690-90018
CHANGE 2 (cont'd)
R18 2100-1758 R: VAR WW 1K OHM 10% LIN 1/2W.
R19 0757-0440 R: FXD MET FLM 7.5K OHM 1% 1/8W.
Page 7-14/7-15, Component Identification photo and Figure 7-8:
Substitute the attached A14 Assy board photo and schematic (Figures 2 and 3) for those shown in the 8690B Manual.
CHANGE3
Page 6-8, Table 6-1:
Add 9 pin tube socket for A5V1 (HP Part No. 1200-0062).
Page 6-10, Table 6-1:
Change capacitor A8C6
to HP Part No. 0180-2268
Change resistor A8R13 to HP Part No. 0757-0868
Change resistor A8R16 to HP Part No. 0757-0422
C: F 140 UF 30 WVDC.
R: F 562K OHM 1% 1/2W.
R: F 909
OHM 1% 1/8W.
Page 6-12, Table 6-1:
Add 7 pin tube socket for A10
Vl (HP Part No. 1200-0053).
CHANGE4
Page 6-18, Table 6-1, under MISCELLANEOUS:
Add the following note to define the 8690B color scheme.
NOTE
This change implements a different color scheme for the standard instrument. Colors prior
to this change are now available as options. Refer to listing below.
8690B STANDARD. Indicates color scheme for the 8690B beginning with this change. (Includes MINT GRAY front
panel and OLIVE GRAY cabinet.)
8690B Option A85. Indicates combination color scheme for the 8690B. (Includes LIGHT GRAY front panel and
OLIVE GRAY cabinet.)
8690B Option X95. Indicates color scheme for the 8690B prior to this change. (Includes LIGHT GRAY front panel and
BLUE GRAY cabinet.)
Add the following 8690B parts or description changes.
08690-4105 CORNER GLIDE (LIGHT GRAY)
# 08690-40002 CORNER GLIDE (MINT GRAY) (STANDARD (COLOR)
08690-6041 ASSY: FRONT PANEL (LIGHT GRAY)
# 08690-60055 ASSY: FRONT PANEL (MINT GRAY) (STANDARD COLOR)
08690-6042 DRIVE ASSY: DIAL (LIGHT GRAY)
# 08690-60056 DRIVE ASSY: DIAL (MINT GRAY) (STANDARD COLOR)
#Denotes standard color for 8690B part beginning with this change.
Page 6-19, Table 6-1, under MISCELLANEOUS:
Add the following 8690B parts or description changes.
08690-0016
#08690-00033 TOP COVER ASSY (BLUE GRAY)
TOP COVERASSY (OLIVE GRAY) (STANDARD COLOR)
08690-00031 REAR PANEL (LIGHT GRAY)
# 08690-00035 REAR PANEL (MINT GRAY) (STANDARD COLOR)
5000-0746
#5000-8725
SIDE COVER 8 X 16 (BLUE GRAY)
SIDE COVER 8 X 16 (OLIVE GRAY) (STANDARD COLOR)
HEWLETT~ PACKARD
9

M~del 8690B
CHANGE 4 (cont'd) . .. '
08690-0017 BOTTOM COV,ER ASSY (BLUE GRAY) .
#08690-00034 BOTTOM COVER ASSY {OLIVE GRAY) (STANDARD COLOR)
5060-0777
#5060-8742
5060-0765
# 5060-8735
RACK MOUNT KIT ~H (LIGHT GR~ Y) .. . . . .
RACK MOUNT KIT 8H (MINT GRAY) (STANDARD COLOR)
RETAINER HANI)LE
ASSt (BLUE GRAY) . . . ,
RETAINER HANDLE ASSY (OLIVE GRAY) (STANDARD 'cOLOR)
#Denotes standard color for 8690B part beginning with this change.
CHANGE5
Page 6-4, Table 6-1:
Change transistor A3Q6
to HP Part No. 1854-0079, TRANSISTOR: SILICON NPN, 2:N3439.
Page 6-6, Table 6-1:
Add diode A4CR12 1901-0033 DIODE: SILICON
100 rnA 180 WV.
Page 6-9, Table 6-1: . . .. . ,
Change transistors A6Q1/A6Q2 to HP Part No. 1854-0079, TRANSISTOR: SILICON NPN, 2N3439.
Page 6-12, Table 6-1: . .. .
08690-90018
Change resistors A10R17/A10R18 to HP Part No. 0698-3126; R: FXD 17 .8K OHlVI 1% 1/8W. (Recommended replace-
ment for 8690B instruments with serial prefixes 1114A and 1124A.)
Page 7-3, Figure 7-2:
Change value
of resistors A10R17/A10R18 to 17.8K ohms.
Page 7-5, Figure 7-3:
Change transistor A3Q6
to HP Part No. 1854-0079.
Page 7-9, Figure 7-5: .
.. . .. .. ,
Add diode A4CR12 in series with zener diode A4CR11. Connect c~thode of A4'C1'ti2 to ground, and anode to A4CR11.
Page 7-17, Figure 7-9: •
Change transistors A6Ql/A6Q2 to HP Part No. 1854-0079.
CHANGE 6
Page 6-7, Table 6-1:
Change A5Q2 to
HP Part No. 1854-0475.
Page
6-l4, Table 6-1:
Change A12Q4 to
HP Part No. 1854-0475.
Page 7-13, Figure 7-7:
Change A12Q4A and A12Q4B to
HP Part No. 1S54-0475.
Page 7-17, Figure 7
-9:
Change A5Q2 to HP Part No. 1854-0475.
CHANGE 1
Page 6-18, Table 6-1:
Add HP Part No. 3160-0092 GUARD: FAN BLADE.
CHANGE 8
Page 6-10, Table 6-1:
Change A8R14 to
HP Part No. 0698-3402, R: FXD MET FLM :h'6 OHM 1% l/2W.
CHANGE 9
Page 6-10, Table 6-1: . .· ,
Change A8C4 and A8C5 to HP Part No. 0160-4051 C: FXD .01 UF 4 kV.
10

Model8690B
Figure 1. Component Identification, Assembly AB (Part of Change 1)
Figure 2.
Component Identification, Assembly A14 (Part of Change 2)
HEWLETT' PACKARD
08690-90018
11

:3::
tn
~
·.!:'"'
m
'"':l
"'l
~
(")
~ ~ ~
tJ
....
to.:>
~--
' @
~@!)
@
@!>
.230V
t:___::j
LI~E
~b1TAGE
o@!!J
!)IST.v{0"8'1' I
~
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PIOA6HV.PWR SUP ASSY
~r--~----l
l .RI3*
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Model8690B
*FACTORY SELECTED PART,MAY BE OMITTED
Figure 4. Component Identification, Assembly A4 (Part of Change 5)
HEWLETT I PACKARD
08690-90018
13

08690-90018
Figure 5. Component Identification, Assembly A3 (Part of Change 1)
14
HEWLETT 'PACKARD

Model 8690B
CHANGE10
Page 6-4, Table 6-1:
Change A3R34
to HP Part No. 0698-3431 R:FXD MET FLM 23.7 OHM 1% 1/8W.
Page 6-17, Table 6-1:
Change R18
to HP Part No. 0698-3431 R:FXD MET FLM 23.7 OHM 1% 1/8W.
Page 7-5, Figure 7-3 (Schematic Diagram):
Change A3R34
to 23.7 Ohm.
Page 7-15, Figure 7-8 (Schematic Diagram):
Change R18
to 23.7 Ohm.
CHANGE11
Page 6-17, Table 6-1:
Add S15 3103-0041 SWITCH:THERMAL.
Page 7-15, Figure 7-8:
Add thermal switch S15
to schematic diagram of Power Supply Section as shown in Figure 6.
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Figure 6. Partial Schematic Diagram of the Power Supply Section Showing Thermal Switch S15
(Part of Change 11)
~HANGE 12
Page 6-9, Table 6-1:
08690-90018
Change A6R3, A6R9, A6R11 and A6R12 to HP Part No. 0698-3442, R:FXD MET FLM 237 OHM 1% 1/8W.
Page 7-17, Figure 7-9:
Change A6R3, A6R9, A6R11, and A6R12
to 237 OHMS.
~HANGE 13
Page 6-14, Table 6-1:
Change A12 BOARD ASSY:
ALC AMPLIFIER to HP Part No. 08690-60074.
Change A12XV1 SOCKET:TUBE to HP Part No. 1200-0573.
HEWLETT I PACKARD
15