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MANUAL CHANGES MODEL 5304A (05304-90006) Page 2
CHANGE 1 (1704A)
Page 9D-6-2, Table 9D-6-1, A1 (05304-60001) Replaceable Parts:
>Add "SERIES 1704" to Description for A1 circuit board.
>Change A1Q1 and A1Q2 from 05304-80001 to 1855-0213; DUAL JFET N-CHANNEL
2N5912; 28480; 1855-0213.
>Change A1R19 and A1R20 from 2100-1768 (20-ohm) to 2100-2010; RESISTOR-VAR
COMP 10-ohm 20%; 32997; 3329H-1-10R.
. .•
Page 9D-8-5, A1 (05304-60001) Schematic Diagram:
>Add "SERIES 1704" at top of A1 (05304-60001) schematic.
>Add "NOTE 4" between A1Q1/A1Q3 and A1Q2/A1Q4.
>Add the following under NOTES:
"4. A1Q1/A1Q3 AND A1Q2/A1Q4 ARE DUAL JFET N-CHAN UNITS WITH.CENTER LEAD TO
CASE C J J T OFF."
>Change Q1-4 in TABLE OF ACTIVE COMPONENTS to Q1/Q3, Q2/Q4; and HP PART
NUMBER to 1855-0213.
>Change the values of A1R19 and A1R20 from 20 to 10-ohm..
CHANGE 2 (1716A)
Page 9D-6-2, Table 9D-6-1, A1 (05304-60001) Replaceable Parts:
>Change A1 from series 1704 to 1716.
>Change A1U15 from 1820-0077 (3N7474N) to 1820-1112; IC TTL LS DUAL-D FLIP-
FLOP; 01295; SN74LS74N.
Page 9D-8-5. Figure 9D-8-1, A1 (05304-60001) Schematic Diagram:
>Change series number, at top of diagram, from 1704 to 1716.
>Change A1U15 in TABLE OF ACTIVE COMPONENTS to 1820-1112.
>Change A1 schematic by disconnecting A1U15B(13) from the junction of
U13E(10) and U8(1,10).
>Add a connection between A1U15B pins 12 and 13.
CHANGE 3 (1804A)
Page 9D-6-2, Table 9D-6-1, A1 (05304-60001) Replaceable Parts:
>Change A1 series number from 1716 to 1804.
>Change A1R19 and A1R20 from 2100-2010 (10-ohm) to 2100-1985; RESISTOR-TRMR
20-ohm 20% C TOP-ADJ 1-TURN; 32997; 33294-1-20R.
Page 9D-8-5* Figure 9D-8-1, A1 (05304-60001) Schematic Diagram:
>Change A1 series number from 1716 to 1804.
>Change the values of A1R19 and A1R20 from 10 to 20-ohm.
CHANGE 4 (Serial Prefix 1940A)
Page 9D-6-3, Table 9D-6-1, A2 (05304-60003) Replaceable Parts:
>Add (SERIES 1940) to A2 Description.
>Change A2S1, S2 and S3 from 3101-1598 to 3101-2383 in HP and Mfr Part Number
columns.
>Change A2S4 thru S7 from 3101-1596 to 3101-2334 in HP and Mfr Part Number
columns.
Page 9D-8-5, Figure 9D-8-1, A2 Schematic Diagram:
>Add (SERIES 1940) at top of A2 schematic diagram.
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