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Very quality copy of original service manual, which contains the circuit diagrams, PCB and lists of components, well as recommendation for calibration procedures of device, also everything else, that need for repair, tuning and use this oscilloscope.
All presented copies have high-resolution, so you can view all in detail.
This manual will very useful for simple owners and for repairers.
I recommend these manual, because myself is owner of Philips PM3216 and I need sometimes servicing these oscilloscope (principally calibrating).
Also, these document is an example of excellent design of technical documentation.
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Excellent printing quality.
A complete and very usefull service manual with all details.
GREAT SERVICE AT VERY LOW PRICE!
A+++++++++++++++++++++++++
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manual excelente completo , diagramas y esquemas bien presentados y buena calidad de imagen.
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muy buen manual completo de buena calidad de impresion preciso y detallado , muy útil para la reparación.
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The service manual is a good quality scan of the Panasonic NV-850, which is electrically identical to the Philips VR 6920, but mecanically just nearly.
Set the handset in the test mode 3, check whether deviation of the TX data is app. 7 kHz Dev. OK
NG
Check whether there is a 250Hz data waveform at Pin 9 of J601. OK
NG
Check VR601, R619, R632, R634, R635, R636 and C611.
Check handset RF unit.
Set the handset in the test mode 6, 926.893873 MHz (250 Hz ±7 kHz Dev.) 1mV output signal from RF jack is applied. Check whether the bell ring. OK Place the handset on the base to charge about 5 seconds, then connect again.
NG
Check whether the 250 Hz data wareform from Pin 1 of J601 is fed. OK
NG Check handset RF unit.
Check whether there is a 250 Hz data waveform at the Q601 collector. OK
NG
Check VR602, Q601 and their peripheral circuits.
Check whether there is a 250 Hz data waveform at Pin 40 of IC603. OK Check IC603 and its peripheral circuit.
NG
Check Q602, Q604 and their peripheral circuits.
5*63*5
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