HP-Service-Note-412A-7 电路图.pdf

Model 412A/AR Vacuum Tube Voltmeter REPLACEABLE PARTS FOR VOLTAGE PROBE ASSEMBLY The Hewlett-Packard Model 412A/AR Vacuum Tube Voltmeter voltage probe assembly has been redesigned because some of the probe parts have become obsolete and are no longer available. modification is available in kit form, Part No. 00412-69501, and can be purchased from your local Sales and Service Office. Individually replaceable parts for both the old and the new probes are identified in Section 11. C. Beginning with Serials 424-10283, Part No. 412A-21G is used as the original Voltage Probe Assembly; see Section I1 for replacement parts. I. INSTALLATION INSTRUCTIONS. A. Serials 134-07482 and below: Voltage Probe Assembly, Part No. 00412-62101, is an overall 11. REPLACEABLE PARTS FOR PROBE replacement for the 412A-21A Voltage Probe. The ASSEMBLIES. cable should be cemented to the cable boot to relieve the stress on the input solder connections. A pair of plastic grip rings can also be installed to reduce the effects of excess stress on the input connection. This NOTE The item numbers in Table 1 refer to Figures la and lb. Former Part Nos are listed in parentheses after part description. L Table la. Replaceable Parts for Voltage Probe Assembly, Part Nos 412A-21A and 412A-21D (see Figure la) - Item Description Part No. 1 - 8 Complete Probe Assembly (412A-21A) . . . . . . . . . replaced by 00412-62101 1 - 7 Probe Cable Assembly less cable boot (412A-21D) . . . replaced by 412A-21G 2-8 Probe Assembly less Jaw Assembly. . . . . . . . . . replaced by 00412-62103 1 Jaw and Sleeve Assembly. . . . . . . . . . . . . . . 5060-0416 2 Inner Sleeve Assembly including R48 (412A-21A-95A) . . replaced by 00412-62103 3 Inner Shield Assembly (412A-21A-95B). . . . . . . . . replaced by 00412-62103 4 Locknut. . . . . . . . . . . . . . . . . . . . . . . 5040-0407 5 #4 Allen setscrew (two required) . . . . . . . . . . . 3030-0051 6 Handle . . . . . . . . . . . . . . . . . . . . . . . 5040-0405 7 Probe Cable (412A-21A-1 or 412A-21D-1) . . . . . . . replaced by 00412-62103 8 Cable Boot . . . . . . . . . . . . . . . . . . . . . 412A-83A distribution: abcfg p L 6 ! 12/64-9 RadioFans.CN 收音机爱 好者资料库 Page 2 Item - 9- 15 9- 14 10 - 15 9 10 11 12 13 14 15 Table lb. Replaceable Parts for Voltage Probe Assembly, Part No, 00412-62101 (see Figure lb) Description Complete Probe Assembly. . . . . . . . . . . . . . . Probe Assembly less cable boot Probe Assembly less Jaw Assembly Jaw and Sleeve Assembly . . . . . . . . . . . . . . . Probe Sleeve Assembly (includes cable and R48) . . . . . . . . . . . . . . . . . . . . . . . . . . . Groundbody. . . . . . . . . . . . . . . . . . . . . Locknut. . . . . . . . . . . . . . . . . . . . . . #4 Allen setscrew (two required) . . . . . . . . . . . . Handle . . . . . . . . . . . . . . . . . . . . . . . CableBoot . . . . . . . . . . . . . . . . . . . . . Part No. 00412-62101 4 12A - 2 1G 00412-62103 5060-0416 00412-62102 5020-0648 5040-0407 3030-0051 5040-0405 412A-83A - -2 412A-7 /- I RadioFans.CN 收音机爱 好者资料库 < - 412A-7 s Page 3 Figure la. Voltage Probe Assembly, Part No. s 412A-21D or 412A-21A (412A-21D does not include item 8) Figure lb. Voltage Probe Assembly, Part No. s 412A-21G or 00412-62101 (412A-21G does not include item 15) RadioFans.CN 收音机爱 好者资料库