SPF 5000 ES Service manual
17
5.4 Quick start
Before any detail check of the system, please check the components listed as follow table.
NOTE: It is important to check the capacitor’s voltage on the board lower than the safety voltage before any
check action.
Functional
block
Checked components
Instruction
function
Reference value
Failed status
DC-DC
Converter
Fuse
F1
Resistance
<0.5ohm
open
MOSFET
(CSD19505KCS)
Q45/Q46/Q47/Q48/Q49/
Q50/Q51/Q52/Q54/Q55/
Q56/Q57/Q58/Q58/Q60/
Q61
Resistance
Diode position
>20k DS
short or open
V
SD
=0.434V REF
0 or OL
240k GD
short or open
11.74k GS
short or open
Diode(1N4148SM)
D15/D17/D19/D20/D21/D
22/D25/D26
Resistance
>240K
short or open
Diode position
V
PN
=0.562V REF
0 or OL
Driver NPN /PNP
Q21/Q26/Q30/Q31
Resistance
11.9K PIN1-2
short or open
Q23/Q27/Q32/Q33
11.9K PIN1-3
short or open
Driver IC
KA3525
Resistance
>400K PIN14-PIN13/12
PIN12-PIN13/11
short or open
IGBT
(STGWT80H65DFB)
Q64/Q66/Q67/Q68
Resistance
Diode position
>60K CE
short or open
V
EC
=0.346V REF
0 or OL
100K GC
short or open
47ohm GE
short or open
Resistance
R221/R222/R223/R224/R
225/R226/R227/R228/R2
37/R238/R239/R240/R24
1/R242/R243/R244
Resistance
22 ohm
short or open
R229/R230/R231/R232/R
233/R234/R235/R236/R2
45/R246/R247/R248/R24
9/R250/R251/R252
Resistance
47K
short or open
R100/R104/R107/R117/R
118/R119/R122/R123
Resistance
10 ohm
short or open
R255/R256/R268/R269
Resistance
47 ohm
short or open
R257/R258/R268/R269
Resistance
49.9K
short or open
