Canon LV-S3E/D78-5423, Service Manual

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Part 4: Troubleshooting
1. TROUBLESHOOTING ..................................................................................... 4-1
1.1 No Power ................................................................................................. 4-1
1.2 No Picture ................................................................................................ 4-4
1.3 No Sound ................................................................................................. 4-6
2. CONTROL PORT FUNCTIONS ...................................................................... 4-7
2.1 System Control & I/O Port Table (IC301) ................................................ 4-7
2.2 IIC Bus D/A Converter (IC3551, M62393FP) ........................................... 4-8
2.3 IIC Bus D/A Converter (IC3561, M62392FP) ........................................... 4-9
2.4 IIC Bus D/A Converter (IC3571, M62392FP) ........................................... 4-9
2.5 Sub CPU (IC1882, PIC12F675) ............................................................... 4-10
2.6 Output Expander (IC1801, TC74LCX574FT) .......................................... 4-10
2.7 Output Expander (IC1802, TC74LCX574FT) .......................................... 4-10
2.8 Input Expander (IC1811, TC74LCX541FT) ............................................. 4-11
3. WAVEFORMS ................................................................................................. 4-12
4. IC BLOCK DIAGRAMS .................................................................................... 4-13
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
Power Supply Lines .......................................................................................... 6-7
Schematic Diagrams ......................................................................................... A3
Printed Wiring Board Diagrams......................................................................... A7
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