HP 8690B User manual

OAVTflN
MANUAl
CHANGES
.-MANUAl IDENTIFICATION-
Model Number: 8690B
Date Printed:
Part Number:
May 1972
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_ r- Serial Prefix or Number-.---- Make Manual Changes_
1114A
1124A
1143A02906 thru
1143A03055
..,... NEW ITEM
ERRATA
Page 6-2, Table 6-1:
1,2 1202A03056 and above 1,
3-6
1,3
1,2,4,5
Change A2C3 HP Part No. 0160-2675 C: FXD MICA 3900 pF 1% 300 VDCW, Factory selected part.
Page 6-11, Table 6-1:
Add A9MP1, MP2 HP Part No. 1205-0011 Heat Sink.
.,. Page 6-15, Table 6-1:
Change B1 to HP Part No. 3160-0056 recommended replacement.
Page 6-16, Table 6-1:
... Change F1 to HP Part No. 2110-0420 FUSE 0.032A 250V.
Add F2 HP Part No. 2110-0055 Fuse cartridge 4 Amp 250V.
Page 6-18, Table 6-1:
Add the following replacement assemblies.
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
A8 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
NOTE
Manual change supplements are revised as often as necessary to keep manuals as current and accurate as possible.
Hewlett-Packard recommends that you periodic<>lly 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.
21 November 1972
HEWLETT iP PACKARD
Printed in U.S.A.

Page 2
ERRATA {cont'd)
Page 7-5, Figure 7-3:
Change
Fl to 0.032A
..... Change the A3 Assembly Resistor Reference Designations to read R30-34, 40-45, 47-80.
..... Change
the circuitry of A3Ql as shown in the attached drawing:
R48
75K
R47*
1620
R79 R80
51. lK IOK
G
Ql
1855-0062
P/0 Figure 7-3. Frequency Control Section Reciprocal Amplifier
....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
LUI
Model8690B

Model S690B ·
ERRATA (cont'dt
•
..... Page 7-15, Figure 7-S: .
Change the wire color code of the wire between XA14 pin 6 and A9CR2, from@ toG:).
The wire color code of the wire at T2 pin 13, 26 V AC winding, is @ .
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 ASR15 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:
Page 3
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.

Page4
CHANGE 1 (cont'd)
Pages 7-9/7-10, Figure 7-5:
Substitute the attached
AS Assy board photo (Figure 3) for the pP.oto shown in the manual.
Add 7S.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 A4Clt11.
Pages 7-11/7-12, Figure 7-6:
Model8690J3
Change Transistors A11Q2, A11Q3, A11Q4, A11Q6, A11Q7, AllQS and A11Q11 to HP Part Number 1S53-0020. (Recom-
mended replacement for 1S50-0062}.
..
Add diode A11CR19. (Connect anode to base of AllQll and cathode to emitterof Al1Q11.) .
Add chassis mounted diode CR6. (Connect anode to cente~. conductor ofMARKER output jac~ &nd cathode to g:round.)
Add chassis mounted diode
CR 7. (Connect anode to center conductor of BLANKING o\ltputjack &nd. cathode to ground.)
Change
All column of REFERENCE DESIGNATIONS Table to include diode Al1CR19.
Change chassis mounted component column (no heading)
of REFERENCE DESIGNATIONS Table to include diodes CR{?
and CR7.
Pag~ 7-14: , · . . . . . .
Substitute the attached AS Assy, ComponentIdentification board photo (Figure 1) for the photo shown in the S690B Manual.
CHANGE 2
Pages 6-14 and 6-15, Table 6-1:
Ch11nge A14 Heater Supply Assy to HP Part Number OS690-60054 (New board)~ ..
Add thefollowing A14 Assy Components (Parts list for new A14 Assy).
C1 0160-3534 C: FXD MICA 510 PF 5% 100 VDCW.
C3
01SO-OOS9
C: FXD ELECT 10 UF -10% +100% 150 VDCW.
C4 0160-3539
C: FXD MICA S20 PF 5% 100 VDCW ..
C5
01S0-0141
C: FXD ELECT 50 UF +75 -10%50 VDCW.
C6 0160-2205
C: FXD MICA 120 PF 5%.
C7
01S0-0094
C: FXD ELECT 100 UF 25 VDCW.
CR1 1902-0041 DIODE; BREAKDOWN: 5.11V
5%400 mW.
CR2 1901-0025 DIODE, SILICON 100 MA/1V.
CR3 1901-0025 DIODE, SILICON 100 MA/1V
CR4 1901-0025 DIODE; SILICON 100 mA/1V.
IC1 1S20-0196 IC: VOLTAGE REGULATOR.
IC2 1S20-0196
IC: VOLTAGE REGULATOR.
IC3 1S20-0196 IC: VOLTAGE REGULATOR.
Q1 1S54,0062 TRANSISTOR: SILICON
NPN.
R1 0757-041S R: FXD MET FLM 619
OHM 1% 1/SW.
R2 0757-0440 R: FXD
MET FLM 7.5K OHM 1% 1/SW.
R3 0757-043S R: FXD MET FLM 5.11K OHM)% 1/SW.
R4 0757-0461 R: FXD MET FLM6S.1K OHM 1% 1/SW.
R5 0757-0473 R: FXD MET FLM 221K OHM 1% 1/SW.
R6 0757-0401 R: FXD MET FLM 100 OHM 1% 1/SW.
R7 0757-0416 R: FXD
MET FLM 511 OHM 1% 1/SW.
RS 069S-3156 R: FXD MET FLM 14.7K
OHM 1% 1/SW.
R9 0757-0447 R: FXD MET FLM 16.2K
OHM i% 1/8W.
R10 2100-1759
R: VAR WW 2K OHM 10% LIN 1/2W.
Rll 0757-0441 R: FXD MET FLM S.25K
OHM 1% 1/SW.
R12 0757-0199 R: FXD MET FLM 21.5K
OHM 1% 1/SW.
R13 069S-3154 R: FXD MET FLM 4.22K
OHM 1% 1/SW.
R14 0757-0416 R: FXD
MET FLM 511 OHM 1% 1/SW.
R15 0757-02SO R: FXD
MET FLM l.OK OHM 1% 1/SW.
R16 0757-02S9 R: FXD
MET FLM 13.3K OHM 1% 1/SW.
R17 0698-3152 R: FXD MET FLM 3.48K
OHM 1% 1/SW.

Model 8690B
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
Page 6-12, Table 6-1:
C: F 140 UF 30
WVDC.
R: F 562K OHM 1% 1/2W.
R: F 909 OHM
1% 1/8W.
Add 7 pin tube socket for A10
V1 (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.
Page 5
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 COVER ASSY (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)

Page 6
CHANGE 4 (cont'd)
08690-0017 BOTTOM COVER ASSY (BLUE GRAY)
#08690-00034 BOTTOM COVER ASSY (OLIVE GRAY) (STANDARD COLOR)
5060-0777
#5060-8742
5060-0765
# 5060-8735
RACK MOUNT KIT 8H (LIGHT GRAY)
RACK MOUNT KIT 8H (MINT GRAY) (STANDARD COLOR)
RETAINER HANDLE ASSY (BLUE GRAY)
RETAINER HANDLE ASSY (OLIVE GRAY) (STANDARD COLOR)
#Denotes standard color for 8690B part beginning with this change.
CHANGES
Page 6-4, Table 6-1:
Change transistor A3Q6 to HP Part No. 1854-0079, TRANSISTOR: SILICON NPN, 2N3439.
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:
Model 8690B
Change resistors A10R17/A10R18
to HP Part No. 0698-3126; .R: FXD 17.8K OHM 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 cathode
of A4CR12 to ground, and anode to A4CR11.
Page 7-17, Figure 7-9:
Change transistors A6Q1/A6Q2 to HP Part No. 1854-0079.
CHANGE 6
Page 6-7, Table 6-1:
Change A5Q2 to HP Part No. 1854-0475.
Page 6-14, Table 6-1:
Change A12Q4 to HP Part No. 1854-0475.

Model8690B Page 7
Figure 1. Component Identification, Assembly AB (Part of Change 1)
Figure
2. Component Identification, Assembly A14 (Part of Change 2)

®
Tt,
{I)
~TOAt«lDE
NOTE
t.
WAVEFORM
AND
VOLTAGE
CON01TIONS:
<ml
'
I®
230V
·<m>
@)
c
...
l~:~~GE
H.,
ER~.~~AY
.
VOLTAGE
c '
""'':"0'
XAI<
Al4 HEATER SUPPLY
ASSY(08690-60054)
~14~~
--
--
( I I I
--
-----
2
..
-1
110
m.•v•-
)J
:\l!!l!)
1
16
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I
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0!STANOBY I
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@
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AS
HV
PWR
SUP
ASSY
~r-----,
' .
Rl3*
Rl4 I
I
·····
,,.
' +
~
~-TURN-ON
TIME
DELAY
CKT-~
L-
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J6
WI~~~~
~f:JNEUT ~~ ~~-
~
:
I
I
I
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16110
TSTRPWRSUP&HUMCKT•IIt•
cHe
R3
'500
,-------'>lui@
~~+27SVOC
R5
221K I XAI4
VOLTAGE
Dl FFERENTIAL
12.6VDC
GRouNDED
TO
J1'2
8690
CHASSIS
ATJI2
•
+ssv
Is'
-~
1:)110
I )
~+6S.OVDC
, 1 1 -
1'
0
Ic:.,.
~~~ToRFUNIT
1 I'--' I
I·
it'(
l )
7@
+zovoc-
'4~'
,
,.
,
--
, • I .
F4
"
P/0 A9 RECTIFIER
-ASSY
..
I
P~O
OVER~L~;j-
:
~::.~11,
l~ l~---
~~~+-~-~~~~~~~-~
I
'
·~;~
R'£FERENCE
DESIGNATIONS
"
"
Ql,2
Rl3-]6·.
A9
Cl,2,4,7
CRI-8,17
Rl,3,4,8,9
RTI K2
Al4
Cl-7
CRI-4
ICI-3
01
Rt-19
K2,3
~~-5
~~6~18,24-27
J6
511,14
DS9
Tl
I
F2-4
WI
'-
L..:__
-
I
L.
XAI4
L___----,
~@
~
:
"-
IIJIZ
CONNECTED
TO
BGSO
GROUND
JUNCTION POINT
AT
REAR
OF
A7
-~:6YfJ
"'
3480
++c7
100"
RIB
I 1
1000 l 1
' '
iUJ_j
L::_
__
I : .
I I
~
~~00
-6.3V
:
Ji2
•
I·"
t""
I I./}!
.:
'
,-l-<@~,~F
----------
)~-6,3VDC
__
_j
REFEREMCEDi!SIGH.TIQHSWITHlNOUTLIMED(-~·-)
.t.SSEMBLIES"ARE.t.BBREVIATED
FULLDESIGHAiiONIN·
CLUDES.t.SSEMBLYMUMBER;e9.•. RlOFASSEMIILY.t.l
IS
.t.IRl.
OESIGHATIONS
Of
OTHER
COMPONENTS
,._,E
COMPLETE.SSHOWN
Figure
3.
Power
Supply
Section, +20V,
+12.6V
and-
6.3V
Power Supplies
(Part
of
Change
2)
"tj
·~
<t>
~
g=
~
8!5
c.c 0
t:tl
..
'
<I

Model8690B
Page9
*FACTORY SELECTED PART,MAY BE OMITIED
Figure 4. Component Identification,Assembly A4 (Part of Change 5)

P~ge 10
Model 8690:8
Figure 5. Component Identification, Assembly A3 (Part of Change 1)