20
OTTOCANALI HGT | SERVICE MANUAL
Fig. 22
Fig. 24
Fig. 23
Check the viability of the U27 regulator by probing
between pin 1,7 and the chassis (ground). (Fig. 22)
Pin 1 to ground: 12Vdc
Pin 7 to ground: 5 Vdc
Check the fans by connecting them to a dc Power
Supply, making sure not to invert the polarity.
Supply 12 Vdc and measure the absorption. (Fig. 24)
The absorption’s value should be 150 mA.
Check the viability of the U61 regulator by probing
between pin 1,7 and the chassis (ground). (Fig. 23)
Pin 1 to ground: 12Vdc
Pin 7 to ground: 3.5 Vdc
16. Checking the fans
Vdc
Vdc
12 Vdc 150mA
Summary of Contents for Ottocanali HGT Series
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