Chapter 1 Basic knowledge of induction cooker 1
First, the heating principle of induction cooker 1
Second, the advantages and disadvantages of induction cooker 2
Third, the use of induction cooker 2
Chapter II Identification and Detection of Common Components of Induction Cooker 3
Section 1 Identification and Detection of Electronic Components 3
I. Resistance 3
Second, the capacitor 7
Three. Diode 10
IV. Bridge Rectifier Reactor 13
Verb (abbreviation of verb) transistor 13
Six, field effect transistor 15
Seven. IGBT 16
Eight. Integrated circuit 18
Section 2 Identification and Detection of Other Components 19
I. Fuse 19
Second, the touch switch 19
III. Thermostat 19
Four. Inductor 20
Verb (abbreviation of verb) transformer 20
Six, current transformer 2 1
Seven, coil (resonant coil) 22
Eight. Fan 23
Nine. Crystal 23
X. optical coupler 23
Xi。 Buzzer 24
The third section introduces the commonly used IC of induction cooker.
One or four operational amplifiers LM324 25
Two, four voltage comparator LM339 26
Three. Dual operational amplifier LM358 28
Four. Dual voltage comparator LM393 29
Verb (abbreviation of verb) drives pulley ta8316s/ta8316as29.
6.8 shift register 74HC 164 30
7555 time base chip 30
VIPer 12A 3 1 power module
Nine-terminal uncontrolled voltage regulator 32
X. Three-terminal error amplifier TL43 1 32
Chapter III Common Tools, Instruments and Maintenance Methods of Induction Cooker 33
Section 1 Common Maintenance Tools and Instruments 33
I. Common tools 33
Second, the commonly used instruments 36
Three. Necessary spare parts 39
Section 2 Replacement of Electronic Components 39
I. replacement of integrated circuits 39
Two. Replace resistor, capacitor and transistor 40.
Section 3 Common maintenance methods and precautions for induction cookers 4 1
I. Inquiry and inspection methods 4 1
Second, the visual inspection method 4 1
III. Voltage Measurement Method 4 1
Four, resistance measurement method 42
Verb (abbreviation of verb) temperature method 42
Alternative methods of intransitive verbs 43
Seven, open circuit method 43
Eight. Cleaning method 43
Nine, short circuit method 43
X. Current-limiting power supply method 43
Eleven, virtual load maintenance method 44
Twelve. Emergency maintenance act 44
Chapter IV Circuit Diagram Reading of Induction Cooker, Typical Unit Circuit and Troubleshooting 45
The first section induction cooker circuit diagram reading 45
I. Classification by system unit 45
Second, according to the drawing classification 45
Section 2 Composition and function of each part of induction cooker circuit 46
I. Circuit composition of induction cooker 46
Second, the role of each part of the circuit 46
Section 3 Analysis and Maintenance Methods of Typical Unit Circuits of Induction Cooker 49
A, mains filter circuit and 300V power supply circuit 49
Second, the low-voltage power supply circuit 50
Third, the main circuit 52
Four, synchronous control, oscillation circuit 54
The verb (abbreviation of verb) excites the pulse forming and power adjusting circuit 56.
Intransitive verb power tube driving circuit 57
Seven, the current automatic control circuit 58
Eight, the power tube C pole overvoltage protection circuit 60
Nine, surge protection circuit 6 1
X. system control circuit 62
XI。 Buzzer circuit 64
XII. Power supply voltage detection circuit 64
Thirteen. The furnace surface temperature detection circuit 65
Fourteen The pow tube temperature detection circuit 65
Fifteen. The fan cooling system 66
XVI. Booting and pot Detection Circuit 67
The fourth quarter induction cooker common fault analysis and maintenance process 68
First, the whole machine does not work 68.
Second, the repeated loss of power tube 69
Three. Low heating temperature (insufficient power) 70
4. High heating temperature (excessive power) 7 1
V. Power tube overheat protection circuit action 7 1
Six, furnace surface overheating protection circuit action 72
Seven. Operation of the power abnormality protection circuit 72
Eight, abnormal fan operation 73
Nine, operating function failure 73
X. The display screen does not display 74
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Chapter V Typical Circuit Analysis and Troubleshooting of Midea Induction Cooker 75
The first section of the beautiful MC-EF 197/EF 197B induction cooker 75
A, mains conversion, start-up delay circuit 75
Second, the system control circuit 77
III. Power-on and pot Detection Circuit 79
Four, synchronous control, oscillation circuit 79
Verb (abbreviation of verb) power adjustment circuit 80
Intransitive verb protection circuit 80
Seven, common fault analysis and maintenance process 82
In the second quarter, Midea's MC-IH-MAIN/V00 standard plate induction cooker 87
A, power filter, 300V power supply circuit 87
Second, the low voltage power supply circuit 87
III. Power-on and pot Detection Circuit 89
Four, synchronous control, oscillation circuit 90
Verb (abbreviation of verb) power adjustment circuit 90
VI. Protection Circuit 9 1
Seven, common fault analysis and maintenance process 93
In the third section, the special chip QF808 constitutes the beautiful induction cooker 97.
I. Power Filter and Power Circuit 97
Second, the special chip QF808 introduction 97
3. Potentiometer Detection and Synchronization Control Circuit 99
Four. Protection circuit 100
V. Common Fault Analysis and Maintenance Process 10 1
Chapter VI Circuit Analysis and Troubleshooting of Galanz Typical Induction Cooker 102
The first section Galanz GAL0508D movement induction cooker 102
A, power filter, 300V power supply circuit 103
Second, the low voltage power supply circuit 103
III. System Control Circuit 106
Four, boot and pot detection circuit 107
Verb (abbreviation of verb) synchronous control and oscillation circuit 108
VI. Power Regulation Circuit 109
Seven. Protection circuit 109
Eight, common fault analysis and maintenance process 1 1 1
Galanz C 18D-X6BP3/C20D-X6BP3 induction cooker Section II 1 16
I. Power Filter and 300V Power Circuit 1 16
Second, the low-voltage power supply circuit 1 19
Three. System control circuit 1 19
Four, boot and pot detection circuit 120
Verb (abbreviation of verb) synchronous control and oscillation circuit 12 1
VI. Power regulating circuit 12 1
Seven, the current automatic control circuit 122
Eight. Protection circuit 122
IX. Common Fault Analysis and Maintenance Process 124
Chapter VII Circuit Analysis and Troubleshooting of Pentium Typical Induction Cooker 129
Section 1 Pentium PC20V Series Induction Cooker 129
I. Power Filter and Conversion Circuit 129
Second, the standby control circuit 129
III. Booting and pot Detection Circuit 13 1
Four, synchronous control, oscillation circuit 13 1
Verb (abbreviation of verb) power regulating circuit 132
VI. Current Automatic Control Circuit 132
Seven. Protection circuit 132
VIII. Common Fault Analysis and Maintenance Process 134
Section 2 Pentium PC20N Series Induction Cooker 138
A, power filter, 300V power supply circuit 138
Second, the low voltage power supply circuit 138
Third, the standby control circuit 140
Four, boot and pot detection circuit 140
Verb (abbreviation of verb) synchronous control and oscillation circuit 14 1
VI. Power regulating circuit 14 1
Seven, the current automatic control circuit 142
Eight. Protection circuit 142
IX. Common Fault Analysis and Maintenance Process 144
In the third quarter, Pentium adopted an induction cooker 147 composed of "fast magnetic" small plates.
I. Power Filter and Power Circuit 149
Two. Brief Introduction of Special Chip HT46R 12 149
III. pot Detection Circuit 150
Four, synchronous control circuit 150
Verb (abbreviation of verb) Automatic current control circuit 150
Intransitive verb protection circuit 150
VII. Common Fault Analysis and Maintenance Process 152
Chapter VIII Circuit Analysis and Troubleshooting of Typical Induction Cookers of Shangpengtang, Supor and Fuji Bo 153
The first section is SR-2886R induction cooker 153
A, power filter, 300V power supply circuit 153
Second, the low voltage power supply circuit 153
Three. System control circuit 157
Four, boot and pot detection circuit 158
Verb (abbreviation of verb) left and right furnace control circuit 159
Six, synchronous control, oscillation circuit 159
Seven. Power regulating circuit 160
Eight, the current automatic control circuit 160
Nine. Protection circuit 160
X. Common Fault Analysis and Maintenance Process 16 1
Supor C 19S06 Induction Cooker 165 Section 2
A, power filter, 300V power supply circuit 165
Second, the low voltage power supply circuit 165
III. System Control Circuit 167
Four, boot and pot detection circuit 168
Verb (abbreviation of verb) synchronous control and oscillation circuit 169
VI. Power Regulation Circuit 169
Seven, the current automatic control circuit 170
Eight. Protection circuit 170
IX. Common Fault Analysis and Maintenance Process 17 1
Section 3 Fuji Bao IH-P260 Induction Cooker 176
A, power filter, 300V power supply circuit 179
Second, the low voltage power supply circuit 179
III. System Control Circuit 179
Four, boot and pot detection circuit 180
Verb (abbreviation of verb) synchronous control and oscillation circuit 18 1
VI. Power regulating circuit 18 1
Seven. Protection circuit 182
VIII. Common Fault Analysis and Maintenance Process 183
Chapter 9 Circuit Analysis and Troubleshooting of Typical Induction Cookers in Jiuyang and BBK 188
Section 1 Jiuyang JYC-2 1CS3 Induction Cooker 188
A, power filter, 300V power supply circuit 188
Second, the low voltage power supply circuit 188
Three, boot and pot detection circuit 190
Four, synchronous control, oscillation circuit 190
Verb (abbreviation of verb) power regulating circuit 19 1
VI. Current automatic control circuit 19 1
Seven. Protection circuit 192
VIII. Common Fault Analysis and Maintenance Process 193
In the second quarter BBK C20 induction cooker 199
A, power filter, 300V power supply circuit 199
Second, the low voltage power supply circuit 199
Third, the system control circuit 202
4. Startup and potential detection circuit 203
Verb (abbreviation of verb) synchronous control and oscillation circuit 203
Sixth, the power adjustment circuit 204
Seven. The protection circuit 204
Eight, common fault analysis and maintenance process 205
Chapter 10 Troubleshooting Example of Induction Cooker 206
The first section of the whole machine does not work fault 206
I. Midea Induction Cooker 206
Second, Galanz induction cooker 209
Third, Shang induction cooker 209
4. Supor induction cooker 2 1 1
Five, Fujitsu induction cooker 2 12
Six, Pentium induction cooker 2 13
Seven, TCL induction cooker 2 14
Eight, Gree induction cooker 2 15
Nine, Le Bang induction cooker 2 15
X.ALOS induction cooker 2 16
XI。 Dexin induction cooker 2 17
Twelve. Other induction cookers 2 17
No heating failure in the second quarter 2 18
I. Midea Induction Cooker 2 18
Second, Galanz induction cooker 224
Third, Shang induction cooker 226
Four, Supor induction cooker 227
Five, Fuji Bao induction cooker 228
Six, Pentium induction cooker 229
Seven, Mrs. Induction cooker 230
Eight, Le Bang induction cooker 23 1
Nine, Huicheng induction cooker 232
X. Xianke induction cooker 232
Xi。 Hemisphere induction cooker 233
Twelve, other induction cooker 233
In the third quarter heating abnormal fault 234
A, beautiful induction cooker 234
Second, Galanz induction cooker 235
Third, Fujitsu induction cooker 236
Four, other induction cooker 236
Other faults in the fourth quarter 237
First, the beautiful induction cooker 237
Second, other induction cookers 237
Appendix Typical Induction Cooker Fault Code 239