Yaesu FT-890 - Page 2

Contents
Introduction & Chip Component Replacement ........... re rey et
Circuit Board Access, Battery & Lamp Replacement, CPU Resetting.......2
Alignment ., . 2. 0s. oo se wee etnies svete tet sieme tems < sislels bie Sein tense
Block & Interconnection Diagrams” <7. 2°.) 0-25. 3. es) sss sy scr ee
PCB Diagrams & Parts Lists ...............4. Crater Go. > >
Local Unite. ioc s ie neinne te ee nen sin fe alto “a fette «ale Mules tee een ee eet en 5A
RE Unit ooo bis Sele fore) abe te fois inklep in? sey ehekey « houeistna (aire Meme ieit te ten tee meme 5B
Display Unit 5. ec 0a tebe 6 sone 0 4 Urolieh do. 6 fare inital sl a MuNOte tetas ts Cometic eit! meee 5C
100-W: Power Amp (PA) Unit .05. 255... eke o sue eee siete: eee meet Era 5D
LPE Unit oo. ate ce orale tote co) ate cena 20 eu ehe «(eat te si aciel telnet mn ee eee 5E
Keyer Unit... 5-058 cig 5 e cis 0h 0 0 0 = euete te se (ee pete en ee SF
Tuner Main: Unit 60.0. 20 oo one on Siete « wae iPotie eagle alts eae eneg es 5G
Tuner Control’ Unit 200. 0.8, 5653 teca ce ce ene e tame ee ese eee ee 5H
Carrier (CAR) DDS Unit... 5) So era 0s ee a alle oes Po wn ect 51
PLL Sub-Loop (SUB) DDS Unit ©... 20/3/55 e's specs ee 5J
Notelt Umit 5 oe: a ei oe 00 ete pe snes 0 ler ete scene je one) oie (emesis eeer eae eee 5K
Potentiometer (VR) A, B & Clarifier (CLAR) Units ................-2-.-002 5L
Headphone (HP), Microphone (MIC) & Potentiometer (VR) C Units ........... 5M
Potentiometer (VR) D & Keyer Control Units .................-e--22200- 5N
Switch A Unit ooo. occcete es. vis Soe ie oilers oe ata ete sola cant encnetn a Cnet ecm rane 50
Switch B Umit 2.0. 05, 2:0 5s ee cies bets) ote fel aM eltieeu airs tet seen te ene ee ee 5P
Switch C- Umit). 22.c0 So doe nce ee so cools te emai. elie ts carte tein te anes renee ae 50