FR-4 (Flame Retardant) fiberglass-reinforced epoxy.
The "CM-4 94V-0" label on a circuit board typically identifies its UL flammability rating and general manufacturing standard cm-4 94v-0 schematics
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: You can often find service manuals and boardviews on specialized repair forums like VLab or archive sites like EService Info . FR-4 (Flame Retardant) fiberglass-reinforced epoxy
: This is a UL 94 flammability rating. It indicates that the board's material will self-extinguish within 10 seconds of being ignited and will not produce flaming drips. Where to Find Schematics cm-4 94v-0 schematics