Check the listing for details. SERVICE MANUAL SET HP 400E 400EL 400F 400FL 403B 427A 350C 350D VIA USB FLASH. Condition: New. Listed at 11.95 USD. PayPal—eBay's service to make fast, easy, and secure payments for your eBay purchases! HP VOLTMETER INSTRUCTION / SERVICE MANUAL SET IN PDF FORMAT. THESE ARE COMPLETE VIEWABLE AND PRINTABLE MANUALS INCLUDING PICTORIALS, SCHEMATICS, PARTS LISTS, AND CIRCUIT DESCRIPTIONS.THIS IS A MUST HAVE FOR ANY AUDIO ENTHUSIAST OR TECHNICIAN. 7 MANUALS IN ALL!! YOU WILL RECEIVE THE FOLLOWING MANUALS IN QUALITY PDF FORMAT: HP 400D/400H VOLTMETER (MILITARY VERSION) 67 PAGES HP 400E/400EL VOLTMETER (DIGITALLY ENHANCED 68MEG) 71 PAGES HP 400E VOLTMETER (MILITARY VERSION) 46 PAGES HP 400F/400FL VOLTMETER (DIGITALLY ENHANCED 44MEG) 46 PAGES HP 403B VOLTMETER 45 PAGES 3.1MEG HP 427A VOLTMETER 45PAGES 3.3MEG HP 350C/D ATTENUATOR SET 26 PAGES 8.6MEG NOTE: DOCUMENTS WILL BE DELIVERED VIA USPS FIRST CLASS MAIL VIA USB FLASH DRIVE.