Crown Audio FM1000A - Manual (Page 4)

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4.2 PS1000 Power Supply ...................................................................................... 4–4
4.2.1
AC Input Board ............................................................................................. 4–5
4.2.2 PFC (Power Factor Correcting) Switching Board .......................................... 4–5
4.2.3 DC Output Board .......................................................................................... 4–6
4.2.4 Cooling Fans ................................................................................................. 4–6
Section 5—Troubleshooting
5.1 Troubleshooting Flow Chart Analysis ................................................................ 5–2
5.2 Digital Multimeter Parameters .......................................................................... 5–3
5.2.1
In Ref (Input Drive Reference) ...................................................................... 5–3
5.2.2 SWR (Standing Wave Ratio) ........................................................................ 5–3
5.2.3 ALC (Automatic Level Control) ..................................................................... 5–3
5.2.4 Power Out .................................................................................................... 5–3
5.2.5 PA Temp ....................................................................................................... 5–4
5.2.6 PA Voltage .................................................................................................... 5–4
5.2.7 Tot Current ................................................................................................... 5–4
5.2.8 PA1–8 ........................................................................................................... 5–4
5.3 Fault Indicators ................................................................................................. 5–5
5.3.1
Antenna ........................................................................................................ 5–5
5.3.2 RF Drive ........................................................................................................ 5–5
5.3.3 PA Temp ....................................................................................................... 5–5
5.3.3.1 Potential Causes for Non-functioning Cooling Fans .............................. 5–5
5.3.4 PA DC ........................................................................................................... 5–6
5.3.5 Multiple Indicators ........................................................................................ 5–6
Section 6—Reference Drawings
6.1 Views ................................................................................................................ 6–2
6.2 Diagrams and Schematics ................................................................................ 6–3
Section 7—Service and Support
7.1 Service .............................................................................................................. 7–2
7.2 24–Hour Support .............................................................................................. 7–2
7.3 Spare Parts ....................................................................................................... 7–2
Glossary
Index