Canon LV-7215U Service Manual page 8

Part 4: Troubleshooting
1. TROUBLESHOOTING ..................................................................................... 4-1
1.1 No Power ................................................................................................. 4-1
1.2 No Picture ................................................................................................ 4-3
1.3 No Sound ................................................................................................. 4-5
2. CONTROL PORT FUNCTIONS ...................................................................... 4-6
2.1 System Control & I/O Port Table (IC801) ................................................ 4-6
2.2 IC Bus DA Converter (M62393, IC281) Port Functions ........................... 4-8
2.3 IC Bus I/O Expander (M62320, IC1851) Port Functions .......................... 4-8
2.4 IC Bus DA Converter (M62392, IC6211) Port Functions ......................... 4-8
2.5 Parallel Bus DA & I/O Port Functions ...................................................... 4-9
3. WAVEFORM .................................................................................................... 4-10
4. IC BLOCK DIAGRAMS .................................................................................... 4-11
Part 5: Parts Catalog
Part 6: Electrical Diagrams
1. PARTS DESCRIPTION AND READING IN SCHEMATIC DIAGRAM.............. 6-1
2. DIODE, TRANSISTOR AND IC PINS............................................................... 6-3
Chassis Block Diagrams ................................................................................... 6-4
Schematic Diagrams ......................................................................................... A3
Printed Wiring Board Diagrams......................................................................... A11
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