ENGINEERING CHANGE NOTICE ECN Number:____________8_____________________ Product:_________Wunderbuss_14_______________ Part Number(s):____500-____-00_______________ Current Board Revision Number:___2a__________ New Board Revision Number:______2a_-_T______ Purpos o Change:____________________________________________ _______TRICEP_modifications____________________________________ _______________________________________________________________ Modifications (attach additional sheets if needed): __________ _______________________________________________________________ ______________SEE_PAGE_2_______________________________________ _______________________________________________________________ _______________________________________________________________ APPROVED: Engineering:______________________Date__/__/__ Production:_______________________Date__/__/__ Quality Assurance_________________Date__/__/__ Customer Service__________________Date__/__/__ Purchasing________________________Date__/__/__ Marketing_________________________Date__/__/__ EFFECTIVITY: [X] Immediate - notify current production [ ] Notify users and update stock [ ] Phase in as stock is depleted Submitted by:_____Bob Groppo______________________on _9/13/84_ Page_1__of_16__ Schematics?_yes____ BOM?____yes____ Form ECN Rev-2 9/83 ENGINEERING CHANGE NOTICE ECΠNumber:_______8_________ߠ Date 9/13/84 PRODUCT ___WB14_____ Page _2o _16__ MODIFICATIONS 1 Cu trac leadin t 11 pin (on solde side) and 11C pin 2 (component side) 2) Jumper pin 1 of 11C to 13B pin 25. 3) Jumper pin 2 of 11C to VI0 pad. 4) On component side cut trace under J3. 5) in VI jumper area cut traces: A - VI0 B - VI1 C - VI2 Jumper: A - VI6 B - VI7 à- jumper post whic leads to bus pin 73 6) Jumper J3 pad leading to 11C pin 4 to VI3 pad 7 Cu trac o componen sid i are 11 goin betwee bu pi 9 an 18 oh SIP pullup. 8) Jumper J2 B-C 9 Cu trac o componen sid nea nea pin an 1 o 11 (trac lead t pi 1 o 11C) 10) Jumper pin 5C pin 13 to spare 180 ohm terminator sip resistor. 11 Cu trac o component sid leadin t pi o I.C 4 an jumpe 4 pi t 4 pi 7 12) On solder side cut trace leading to pin 9 of 9D. .pa ENGINEERING CHANGE NOTICE ECΠNumber:_______8_________ߠ Date 9/13/84 PRODUCT ___WB14_____ Page _3o _16__ 13) In area 4B remove resistors as follows: -[330]- remove -[330]- remove -[330]- subsitute 680 ohm resistor -[3.3k]- remov -[3.3K]- remove -[220]- remove -[220]- remove 14) Jumper 10C pin 4 to 10C pin 7 and remove 2N3904 location 11E. 15) Jumper pin 11 of 11C to pin 14 of 11C. 16) Delete pages 3 and 5 of schematics. Find included new schematic set. .pa ENGINEERING CHANGE NOTICE ECΠNumber:_______8_________ߠ Date 9/13/84 PRODUCT ___WB14_____ Page _4o _16__ REMOVE FOLLOWING PARTS FROM BOM: qty location part 19 14 pin sockets 6 16 pin sockets 10 20 pin sockets 3 8 pin sockets 1 28 pin sockets 40 40 pin sockets 1 1D 7812 regulator 1 1E 7912 regualtor 4 1E,1D 1 uf Tant caps 3 4D,5D,6D 8250 Uarts 3 1D,2D,3D 1489 receivers 4 1E,2E,3EA,3EB 1458 op amps P1,P2,P DB-25Ӡpmoun connector 1 P4 DB-15S connector 1 6A 74LS74 1 10D 74LS373 latch 1 11D 81LS95 buffer 1 9B 74LS244 1 5A 18.432 Mhz XTAL 4 5 p ca silve mica 1 2A 112 pF cap silver mica 1 3A 2 uh inductor 1 7A 3.3 ohm resistor 1 6A 390 ohm resistor 1 3C 74LS90 counter 1 6B 74LS174 latch 1 1D 1.5 K resistor 1 1D 3.3 K resistor 1 ECN patch 1N914 diode 1 ECN patch 75 ohm resistor 1 11E 2N3904 transistor 3 4B 330 ohm 2 4B 3.3K 2 4B 220 ohm 1 6D 3.3K 1 11E 4.7K 1 9E 4.7K 1 10C 3.3K 1 10B 3.3K 1 7A 4.7K 1 7A,9C Headers J1-J3 1 13A Battery header ADD: 680 ohm, 1/4 watt, 5%, cf resistor