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Maintenance Basis

Welding Technique

Electronic Circuit Basis

iPhone Maintenance

Exterior Screen Maintenance

Andriod Phone Maintenance

Laptop Maintenance

Desktop Computer Mainboard Maintenance

Graphics Card Maintenance

Series of courses

Microphone fault repairing

Domestic mainboard repair

Basic Circuit Concepts

Electronic components

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71. Gate circuit

63. MOS tube applications in the circuit

62. MOS tube substitution

61. MOS tube quality judgment

60. MOS tube measurement

59. MOS tube body diode

58. MOS tube conduction conditions

57. MOS tube code

56. MOS tube classifications

54. Triode applications in the circuit

53. Triode substitution

52. Triode measurement and judgment

51. Triode conduction conditions

50. Triode code

49. Triode composition

48. Triode introduction

47. Diode substitution

46. Diode measurement and judgment

45. Diode characteristics

43. Diode introduction

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