Page 53 - GIGABYTE Service Manual-v3.0-110101

DES Circuit Section: (example: PWM3_CR)

The Section includes Q50, Q51, Q55, Q75, Q9, DD3, DD4, DD7 and R, C. If
PWM3_CR is high, DD7 LED brightens, indicating PHASE 3 is working. Then PWM3
connects to PWM3_DRV which connects to DU2 PWM drive. PHASE4, PHASE5,
PHASE 6, all work at the same way (See Table 3-1: PWM PHASE Control Table)

Table 3-1: PWM PHASE Control Table

Figure 3-5: VCORE Section 4

3.1.2 The definition of PWM signals

Example: EP45-UD3R
Check the impedance by multi-meter on each pin of PWM and identify which resistor
or capacitor is defected. The definition of PWM signals is as below:

31