8 Digits Calculator LED Digital Children Watches(Yellow)

8 Digits Calculator LED Digital Children Watches(Yellow)

Brand: Not Specified | Dijual di: Lazada
IDR 248.000
Fitur/fungsi Jam Luminous|Calculator
Model Family Love-shoubiao-06-huang
Ukuran (L x W x H cm) 10 x 10 x 10
Berat (kg) 0.10
Tipe garansi No Warranty
Watch Strap Color Yellow

This is the electronic form with calculator function, size of length 22.5*3.3 width *1.2 thickness weight 21 grams

Working principle of electronic watch:

Power supply - crystal oscillation frequency of 32768HZ - - - - - - - - - - - - - - - - - - - - - output
Electronic components
Non directional device (passive device):
Resistance: unit: Ohm
Capacitor: Fala
Inductance: unit: Frederick
Directional device (active device): electrolytic capacitor, diode, transistor, buzzer
Movement structure: power (battery), PCB, components, plastic cover, metal,
Test requirements: detection of environment, equipment, method.
Precision, operating current, static current, function. (service life)
Production process: PCB---COB--- solder - Test -----EL chip ----LCD---- into the cover - up board (on the hardware) ---- test ---- the battery - function test - stickers.

Common trouble shooting:

Whiteboard: 1, the first battery has electricity, no electricity, the replacement of the battery; there is electricity, the movement of the AC point can be. 2, the battery has electricity, short circuit is not good, repair PCB.
Hyphenation (ischemic stroke): 1, may be loose screws, tighten screws; 2, barge horse on dirt, reload remove dirt may; 3, LCD or PCB bad, replace the above components.
According to the word light flash or wordless: 1, the battery power, battery replacement; 2, the battery voltage is normal, according to the word light flash is lighting interference, the interference of capacitance is increased;

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