Desolder and test the 100kΩ–470kΩ resistors located in the voltage divider network feeding the comparator IC. Important Safety Warning
Suppresses line voltage spikes or surges caused by grid instability.
: A Metal Oxide Varistor (MOV) clamps transient voltage spikes coming from the mains power grid.
The CHK-V9.04G circuit diagram features a range of components and symbols, including: chk-v9.04g circuit diagram
Check for 310V DC at the SMPS input pin. Replace the Viper12A/AM-22A IC and check the 22Ω flameproof startup resistor. on plug-in Shorted IGBT or shorted main bridge rectifier.
The core switching transistor (commonly a 20A–25A, 1200V variant like the H20R1203 or FGA25N120). It switches at frequencies ranging from 20 kHz to 35 kHz to oscillate the LC tank circuit. 3. Auxiliary Switch Mode Power Supply (SMPS)
: Integrated power output to drive a cooling fan, ensuring the IGBT and bridge rectifier remain within safe operating temperatures during use. Desolder and test the 100kΩ–470kΩ resistors located in
The board contains an array of high-resistance, high-voltage resistors used for synchronous voltage detection. Specifically, resistors labeled or other high-power variants ranging from 330kΩ, 470kΩ, or 820kΩ are critical. In the field, technicians note that if these resistors burn out or change value, the induction cooker will fail to detect the pan or will stop heating entirely [12†L6].
Search for the number in context. The label chk-v9.04g probably refers to:
Before diving into the diagram, we must understand the board's role. The CHK-V9.04G is generally a combined with a motor driver interface. Unlike a standard computer PSU, this board handles: The CHK-V9
Technical support sections of the machine manufacturer.
Without the circuit diagram, diagnosing error codes can be difficult. The CHK series is notorious for the . According to repair logs from maintenance forums, an E9 display on this specific board generally correlates with issues in the thermal protection chain [8†L7-L8].
: The board utilizes an Insulated Gate Bipolar Transistor (IGBT) to manage high-frequency switching for the induction coil, which is essential for efficient heat generation.