Look these pictures and read text carefully,
you should be able to make open loop test circuit
oscillator calculations formula is there for Rt & Ct
and block diagram show what to measure and where.
Everything you need has been told there.
Look these pictures and read text carefully,
you should be able to make open loop test circuit
oscillator calculations formula is there for Rt & Ct
and block diagram show what to measure and where.
Everything you need has been told there.
You need 2 channel oscilloscope to check output signals in pins 12 & 13 .
You should see some signals between pict.1 and pict.2 ( output low pulse is modulated [PWM] and varies depending on control )
This IC with P channel HEX Power Mosfet (IRF 9520) + few zeners + some resistors + step down transformer (converting 110 V to almost 40 V) + LM 358 N (LOW POWER DUAL BIPOLAR OP-AMPS) ....... are connected in a circuit to produce different voltage supplies (different outputs) 24 VDC, 10 VDC etc .....
Can you tell me how the circuit is operating ? OR what actually is happening in the circuit ?
without any schematic, how to understand or read which component is connected to which component & to which pin no. ?