Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Oscilloscope Patterns and Waveforms

Using Oscilloscope
1. Primary signal of ignition coil
(1) Run the engine at an idle speed.
(2) Connect the probe to oscilloscope pick-up point 1 as shown in the circuit diagram and check the primary signal of the ignition coil.
2. Control signal of ignition power transistor Connect the probe to oscilloscope pick-up point 2 as shown in the circuit diagram and check the control signal of the ignition power transistor.