Panasonic VL-SV75 Series, Service Manual

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Table of Contents
Page Page
1. Safety Precautions............................................................5
1.1. For Service Technicians....................................................... 5
1.2. Insulation Resistance Test (by Insulation resistance
tester).............................................................................................5
1.3. Power Caution....................................................................... 5
2. Warning..............................................................................6
2.1. Battery Caution......................................................................6
2.2. About Lead Free Solder (PbF: Pb free)............................... 6
2.2.1. Suggested Pbf Solder....................................................... 6
2.3. Discarding of P.C. Board...................................................... 7
2.4. Note For Repairing................................................................ 7
2.5. Disposal of old Equipment................................................... 7
3. Specifications....................................................................8
3.1. Main monitor station (VL-MV75)...........................................8
3.2. Door phone (VL-V524)...........................................................8
3.3. Power supply unit (VL-PS241) (indoor use only)............... 8
4. Technical Descriptions.....................................................9
4.1. Block Diagram....................................................................... 9
4.2. IC Operation......................................................................... 11
4.2.1. Monitor Station Section...................................................11
4.2.2. Door Station Section....................................................... 15
5. Location of Controls and Components........................ 17
6. Installation Instructions................................................. 18
7. Operating Instructions................................................... 19
8. Service Mode...................................................................20
8.1. Things to do after replacing IC...........................................20
8.1.1. Main Monitor Station....................................................... 20
9. Troubleshooting Guide.................................................. 21
9.1. Operation Check of the Door Station................................ 21
9.2. Operation Check of the Main Monitor Station.................. 25
9.2.1. Defect of the Communication Between the Main Monitor
Station and the Extension Monitor............................................ 26
9.2.2. Defect of the Extension Monitor Video Recording.......... 27
9.2.3. Defect of the Main Monitor Station Power Supply.......... 28
9.2.4. Defect of the Main Monitor Station Video Recording...... 33
9.2.5. Defect of the Communication Between the Main Monitor
Station and the Door Station.....................................................34
9.2.6. Defect of the Communication Between the Extension
Monitor Station and the Door Station........................................35
9.2.7. Defect of the Key board unit........................................... 36
9.3. Signal Route.........................................................................37
10. Disassembly and Assembly Instructions................... 43
10.1. Main Monitor Station......................................................... 43
10.1.1. How to Remove the DC cable [No.1]............................ 43
10.1.2. How to Remove the Cabinet Cover [No.2]....................43
10.1.3. How to Remove the Main Board, Speaker and LCD [No.
3]............................................................................................... 44
10.1.4. How to Remove the Power board, Key board [No.4].... 45
10.2. Door Station....................................................................... 46
10.2.1. How to Remove the Front Panel [No.1]........................ 46
10.2.2. How to Remove the Door Station [No.2].......................47
10.2.3. How to Remove the Main Board and Camera Unit [No.3]
.................................................................................................. 48