DAV-SZ1000W, HBD-SZ1000W (serv.man2) - Sony Audio Service Manual (repair manual). Page 9

1. The FLUORESCENT INDICATOR TUBE DRIVER(IC501) outputs signal for the 

FLUORESCENT INDICATOR TUBE(ND501) to operate by the control signal from 
the SYSTEM CONTROL(IC5002).

2. Voltage required for the FLUORESCENT INDICATOR TUBE operation is supplied 

g

q

p

pp

from the DC/DC CONVERTER(T501).

3. The LED lights up by the signals from the SYSTEM CONTROL(IC5002) and the 

FLUORESCENT INDICATOR TUBE DRIVER(IC501).

(Note) How to check if it started properly.

•

When the SYSTEM CONTROL(IC5002) boots up properly, “DEMO” will be 
indicated on the display of the main unit. If “DEMO” is not displayed, you need to 
check the power input signal to the SYSTEM CONTROL(IC5002).

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