
ER-II
Service Manual
Service ManualService Manual
Service Manual
2 7/4/2007
< Table of Contents >
1. Introduct on ............................................................................................................................... 4
1.1. Preface .................................................................................................................................... 4
1.2. Precaut on ............................................................................................................................. 4
1.3. Spec f cat ons ...................................................................................................................... 5
1.4. D mens on.............................................................................................................................. 6
1.5. Key & SYMBOLS ON DISPLAY .................................................................................... 7
1.6. Seal ngMethod .................................................................................................................... 8
2. Cal brat on ................................................................................................................................. 10
2.1. General Cal brat on ........................................................................................................ 10
2.1.1. C4 Sett ng ........................................................................................................... 11
2.1.1.1. C4-1 Sett ng ................................................................. 11
2.1.1.2. C4-2 Sett ng ................................................................. 11
2.1.1.3. C4-3 Sett ng ................................................................. 11
2.1.1.4. C4-4 Sett ng ................................................................. 12
2.1.1.5. C4-5 Sett ng ................................................................. 12
2.1.2. SPAN Cal brat on Sett ng (C-3).............................................................. 13
2.1.3. Grav ty Constant Value Sett ng (C-9) ................................................ 13
2.1.4. Cal brat on factor Sett ng (C-10).......................................................... 14
2.1.5. D splay ng Real A/D Value (C-5) .......................................................... 14
2.1.6. Input Funct on Key Code (C-6).............................................................. 15
2.1.7. Percent Cal brat on (C-7) .......................................................................... 16
2.1.8. Battery Cal brat on (C-8)........................................................................... 16
3. The Schemat cs and D agram......................................................................................... 18
3.1. System Block D agram................................................................................................. 18
3.1.1. Ma n........................................................................................................................ 19
3.1.2. Power Part & Back_L ght........................................................................... 20
3.1.3. Key Part ............................................................................................................... 21
3.1.4. D splay Dr ver(Ma n PCB) & REAR D splay...................................... 22
4. Exploded V ew Load Cell draw ng ............................................................................... 23
4. Load Cell draw ng.................................................................................................................. 24
5. Part Locat on............................................................................................................................ 25
5.1. Ma n PCB (Top) ................................................................................................................ 25
5.2. Ma n PCB (Bottom) ........................................................................................................ 26
5.3. Rear D splay PCB (Top)............................................................................................... 27