Sym RS-50 Service Manual page 144

CDI Electrical System Circuit Inspection
Remove battery cover.
Disconnect the CDI unit coupler, and check its
circuit to diagnosis related ignition components.
CDI Electrical System Circuit Inspection
ITEM
Main Switch
Pulse Generator
Primary
Ignition Coil
Secondary
If above checks are in normal but spark plug is still no spark. Then it probable causes from CDI set or
high voltage coil.
If abnormal circuits are found in above checks, at first check all items, and then check each item one
by one.
This chapter Contents
Measure at:
Black/ Blue -green
Blue/Yellow-green
Black/yellow-green
Green-high voltage cable -w/o Cap
Green-high voltage cable - w/ Cap
15. ELECTRICAL EQUIPMENT
CDI unit
Standard (at 20℃)
Continuity (battery voltage) as
master switch ON
50 ~200Ω
0.21Ω±10%
3~5KΩ
7~12KΩ
15-11