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Manual-link came 30 minutes after having paid for an extremely rare (40 years old) item (sony icr-120) and helped me to get the radio rework again. So really good help for me, fast and reliable delivery and -taken that into consideration- a very reasonable price for that service. So thanks again! Mike, Germany
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Some of the pictures in this manual are a bit irritating. I had to dissassemble the unit and some of the screws have different threads, which is not mentioned in this manual. Also some of the drawings of the boards look different than the actual boards.
After all, the manual was very useful. I was able to recalibrate the capstan drive and it is working fine again.
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This manual is very good. 303 pages scanned in a very high resolution. My camera has bad, leaking capacitors which all of the V5000 models are suffering from these days.
There is a huge part list with all capacitors, transistors etc. in this manual which helped me a lot. Otherwise I would not have been able to buy replacement parts.
The dissassembly guide is very enormous and detailed. Unlike on the Panasonic MS1 manual I downloaded here it actually looks like the real parts look. And the screws are labeled correctly, so you shouldn't have any left after the repair. ;)
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has all the schematics you could need,and very well laid out format also has all part numbers along with an exploded view which is helpful
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Very nice to have! Now it is no problem to understand how it is put together.
Helps me a lot.
7615 Adjustments page 19
Troubleshooting Tips
The Power Supply Circuit
When the set is turned On, the Main Switch Mode power supply is turned On. This supply produces the +130 volt,+32 volt,-32 volt, two +15 volt, and Audio supplies. When IC 7302 develops a normal steady state operation, the 130 volt supply is sampled by resistors 3324,3323,and 3322. This sample voltage is then sent to Shunt regulator 7303 which drives the feedback optoisolator 7303.The feedback voltage on Pin 14 is then compared with an internal 2.5 volt reference by comparator "C". Comparator "C" then sets the reference voltage on the inverting side of comparator "B" to control the On time of the drive at Pin 3.If the voltage on Pin 14 increases due to the 130 volt supply increasing, the On time of the pulse on Pin 3 will be reduced. If the 130 volt supply decreases, the voltage on Pin 14 would decrease, causing the On time of the pulse on Pin 3 to increase. This is used to keep the 130 volt supply at the correct voltage. Variable resistor 3322 is used to adjust the 130 volt supply to the correct level. The overvoltage protection circuit of the IC will shut the IC down if the VCC level on Pin 1 exceeds 17 volts. To troubleshoot this circuit, first check the On/Off line from the Small Signal Panel to ensure that it is going Low. Then check for the presence of startup voltage on Pin 1 of the regulator IC 7302.If the IC is working correctly, this voltage will be changing from 9.4 to 14.5 volts. If the startup voltage is not present, check the startup resistor 3300 and the bridge rectifier. If the voltage on Pin 1 is changing, check the drive signal on Pin3.Then check for signal on the gate and drain of 7301.An excessive load on the secondary, a short on the 130 volt line for example, would cause the supply to pulse with little or no voltage on the secondary.
Picture problems
Picture too dark or too bright Press �Smart Picture� button on the remote control. If this improves the picture, increase / decrease the brightness value or increase / decrease the contrast value. Enter the Customer Service Mode. If this improves the picture, exit Customer Service Mode, then Increase / decrease the brightness value or increase / decrease the contrast value. White line around picture elements and text Press �Smart Picture� button on the remote control. If this improves the picture, decrease the sharpness value. Enter the Customer Service Mode. If this improves the picture. Decrease the sharpness value. Snowy picture Snow is an antenna or antenna connector problem. Check tuner and AGC. Black and white picture Press the �Smart Picture� button on the remote control. If this improves the picture, increase the color value. Enter the Customer Service Mode. If this improves the picture. Increase the color value. Menu text not sharp enough Press the �Smart Picture� button on the remote control. If this improves the picture, decrease the contrast value. Enter the Customer Service Mode. If this improves the picture. Decrease the contrast value. Sound problems No sound or sound too loud (after channel change / switching on) - Enter the Customer Service Mode. If the volume is OK, increase / decrease the volume level.
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