HP TM 11-6625-2779-14&P manual Appendix C, Manual Backdating Changes

Model 3555B	APPENDIX C	Appendix C
	MANUAL BACKDATING CHANGES
	Model 3555B
	TRANSMISSION AND NOISE MEASURING SET
	This manual backdating sheet makes this manual applicable to earlier instruments.
	Instrument-component values that differ from those in the manual, yet are not listed in
	the backdating sheet, should be replaced using the part number given in the manual.

Instrument Serial Prefix	Make Manual Changes
916-00500 and below	1 thru 7
916-00509 and below	2 thru 7
953-00544 and below	3 thru 7
953-00825 and below	4 thru 7
0992A01395 and below	5 thru 7
0992A03536 and below	6, 7

Instrument Serial Prefix	Make Manual Changes
0992A03537 and below	7

Change No. 1

In instruments with S/N 916-00500 and below CR1 and C2 in the power supply were located as shown in the following figure:

Change No. 2

Table 6-1and figure 7-3,change:

A2C8 to 33pF, part no. 0160-2150

A2C9 to 320pF, part no. 0140-0226

A2C10 to 39pF, part no. 01400175

A2C11 to 51 pF, part no. 0160-2201

Change No. 3

Figure 7-4,change the pin connections as follows: 7 to 6, 13 to 12, 16 to 15, 15 to 13. Instruments with serial numbers 953)00544 and below had a 03555-66506 Revision A board in them. This board is not interchangeable with the Revision B board. The above pin connections are for the Revision A board.

Change No. 4

Delete S6 in figure 7-5and in Table 6-1.Earlier instruments did not have this switch. See the following figure for earlier instruments.

C-1