HP 5061A

MANUAL CHANGES MODEL 5061A Page 10
CHANCE 5 (1852A) (STANDARD INSTRUMENT) (Continued)
of R20 and the junction of L2 and C12.
Table 1. A5A4 Part No. 05061-6152 Replaceable Parts
DESCRIPTION HP PART NUMBER
05061-6152
0140-0196
1820-1437
1854-0005
0757-0280
0757-0283
0757-0442
2100-0896
ASSY: SWITCH CIRCUIT BOARD (SERIES 1904)
C: FXD MICA 150 pF 5% 300VDCW
IC: TTL DUAL MONOSTABLE MVB/SCHMITT-TRIGR
TSTR: NPN SI 2N708
R: FXD FLM 1K OHM 1% 1/8W
R: FXD FLM 2K OHM 1% 1/8W
R: FXD FLM 10K OHM 1% 1/8W
R: VAR WW 15K OHM 1-TURN TOP-ADj
REFERENCE
DESIGNATION
A5A4
A5A4C1*
A5A4IC1
A5A4Q1
A5A4R1
A5A4R2
A5A4R3
A5A4R4
Page 8-19, Figure 8-13, A5 Schematic Diagram:
Change A5 from SERIES 1840 to SERIES 1904.
Replace A5A4 schematic diagram with diagram in attached Figure 3 for A5A4 Part No. 05061-6152 (SERIES 1904
circuit board assembly.
Replace A5A4 component locator illustration with new illustration in attached Figure 4.
Page 8-21, Figure 8-14, Part of A5 Schematic Diagram:
Page 8-23, Figure 8-15, Part of A5 Schematic Diagram; and
Page 8-25, Figure 8-16, Part of A5 Schematic Diagram:
Change A5 series number at top of diagrams from SERIES 1840 to 1904.
NOTE The new A5A4 circuit board assembly uses a potentiometer for adjustment in place of a variable capacitor.
The adjustment procedure given in the Operating and Service Manual for A5A4 is the same for either
assembly.
Page 8-15, Figure 8-11, A3 Schematic Diagram:
Change "(SERIES 1640A)" at top of A3 and A3A1 schematics to (SERIES 1852).
Add 0.01 pf capacitor (C54) in parallel with electrolytic capacitor C10.
Add 1000 ohm resistor (R40) in series between the arm
Change the value of C12 from 1000 pF to 0.0047 /xF.
CHANGE 6 (1904A) (STANDARD INSTRUMENT)
See NOTE at end of CHANGE 10.
Page 6-12, Table 6-1, A8 Replaceable Parts:
Add "(SERIES 1904)" to A8 (05061-6095) Description.
Add "(SERIES 1904) ” to A8A1 (05061-6096) Description.
Change "HP Part Number" for A8A1C9, C10, and C22 from 0180-0113 to 0180-2614.
Change "Mfr Part Number ” for A8A1C9, CIO, and C22 from 109D107C2030T2 to 150D107X903052.
Page 8-33, Figure 8-19, A8 Schematic Diagram:
Change "SERIES 1244A" at top of A8 schematic to "SERIES 1904".
Add SERIES 1904 at top of A8A1 schematic.
Page 6-24, Table 6-1, Replaceable Chassis Parts:
Change C5 from 0180-0090 (1000 /xF) to 0180-2877; C: FXD ELEC 2400 /xF +75-10% 50VDCW; 28480; 0180-2877.
Page 8-51, Figure 8-23, Schematic Diagram:
Change C5 from 1000 to 2400 /xF.
CHANGE 7 (A5 SERIES 1904) (OPTIONS 001 or 003)
NOTE: The following change for A5 series number does not affect the serial prefix number of the instrument
with A5 added for Option 001 or 003. The series number on the A5 module assembly may not be the same as the
instrument serial prefix number.
Page 6-33, Table 6-3, Option 001 (A5) Replaceable Parts:
Change A5 (05061-6118) series number from 1840 to 1904.
Page 6-37, Table 6-3, Option 001 (A5A4) Replaceable Parts:
Change A5A4 (05061-6033) and all components for this assembly with A5A4 Part No. 05061-6152 and com 
ponents in attached Table 1.