HP 8690B Manual Change page 8

Model 8690B
08&90-90018
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CHANGE 1 (cont'd)
Pages 7-9/7-10, Figure 7-5:
Substitute the attached A8 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 RE.FERENCE DESIGNATIONS Table to include diode A4CR11.
Pages 7-11/7-12, Figure 7-6:
Change Transistors A11Q2, Al1Q3, A11Q4, A11Q6, A11Q7, Al1Q8 and AllQll to HP Part Number 1853-0020. (Recom-
mended replacement for 1850-0062).
Add diode Al1CR19. (Connect anode to base of AllQll and cathode to emitter of Al1Q11.)
Add chassis mounted diode CR6. (Connect anode to center conductor of MARKER output jack and cathode to ground.)
Add chassis mounted diode CR7. (Connect anode to center conductor of BLANKING output jack and cathode to ground.)
Change All column of REFERENCE DESIGNATIONS Table to include diode A11CR19.
Change chassis mounted component column (no heading) of REFERENCE DESIGNATIONS Table to include diodes CRt?
and CR7.
Page 7-14:
Substitute the attached A8 Assy, Component Identification board photo (Figure 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
Rl 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% +100% 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: 5.11 V 5%400 mW.
DIODE, SILICON 100 MA/1V.
DIODE, SILICON 100 MA/1 V
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% 1/8W.
R: FXD MET FLM 5.11K OHM 1% 1/8W.
R: FXD MET FLM 68.1K OHM 1% 1/SW.
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% 1/8W.
R: FXD MET FLM 16.2K OHM 1% 1/SW.
R: VAR WW 2K OHM 10% LIN 1/2W.
R: FXD MET FLM 8.25K OHM 1% 1/8W.
R: FXD MET FLM 21.5K OHM 1% 1/BW.
R: FXD MET FLM 4.22K OHM 1% 1/8W.
R: FXD MET FLM 511 OHM 1% 1/8W.
R: FXD MET FLM l.OK OHM 1% 1/8W.
R: FXD MET FLM 13.3K OHM 1% 1/8W.
R: FXD MET FLM 3.48K OHM 1% 1/8W.
HEWLETT
PACKARD
8