HP 8690B Manual Change page 7

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. 1SS4-007 3 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
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