1. Power on no output, can start normally, the indicator light is normal, first replace the output line, for the relay charger directly short circuit relay test machine. Is charging, the charger light indicator has two kinds, one is steady on, one is flashing, steady on is the ordinary charging indicator, flashing is the pulse charging. Power on 2 red lights: power test machine, no-load voltage is normal, and then 358 or 324 for a new test machine.
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2. Power flashing light, please repair welding transformer pin, and then test, if still, please check 431, photoelectric coupler, output part of the diode is short circuit, transformer core is loose, power input part 10 ohm small resistance is open, or replace 3842 again test.
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3. Charging does not turn the lamp, first use the tester to detect the data, generally charging the new battery voltage is not higher than 59.5, charging the battery is not higher than 58.8 for about half a year, it is normal, higher than this voltage may not turn the lamp.
Rechargeable batteries are usually not fully charged until they turn green. Some Ni-MH rechargeable batteries need to be charged for more than ten hours. The charge time is usually indicated on the battery.