Dolby
®
Model CP650 Installation Manual
Maintenance and Troubleshooting
9-6
9.3 CP650
Troubleshooting
9.3.1
Power Supply Voltage Ranges
Six test points are located on the front subpanel for measuring power supply voltages.
They can be accessed by removing the front panel.
Sw
+5VB
--14VB
+5V
--15V
+14VB
+15V
Rs
MIC MUX
Figure 9–9
Power Supply Voltage Test Points
Table 9–1
Main Power Supply Voltage Ranges
Test Point
Voltage Range
+15 V
14.5 to 15.8
–15 V
–14.5 to –15.8
+5 V
4.85 to 5.15
Table 9–2
Bypass Power Supply Voltage Ranges
Test Point
Voltage Range
Main AND Bypass Supplies On
Voltage Range
ONLY Bypass Supply On
+14 VB
13.9 to 15.2
11.0 to 12.5
–14 VB
–13.9 to –15.2
–11.0 to –12.5
+5 VB
4.6 to 5.0
4.6 to 5.0
