7
If a steady "seconds"
Neon indicator is
wanted, then mount
a jumper at position
SK2.
15. Jumper
Construction
IC1 : VK8099
(programmed PIC16F631-I/P)
16. IC. Watch the
position of the notch!
F1 : 1A
14. Fuse.
C7 : 220µF/25V
C8 : 2.2µF to 4.7µF /
350V or higher
C...
L1 : 330µH
12. Coil
17. Main board test
Connect a 12Vac (not DC!) adaptor to
the board. Carefully measure about
180Vdc between ground (eg metal part
of VR1) and cathode (white stripe) of D6.
In case of failure:
Check the fuse
Check the +5Vdc voltage over C2 & C4
Position of IC1
Solderings and component position
!!CAUTION HIGH VOLTAGES!!
DO NOT TOUCH THE BOARD
SK1
11. Connector
13. Electrolytic Capacitor.
Watch the polarity !
Summary of Contents for K8099
Page 12: ...12 Schematic diagram base Schematic diagram...
Page 13: ...13 Schematic diagram display Schematic diagram...
Page 14: ...14 PCB Main PCB...
Page 15: ...15 PCB Display PCB...
