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.
un manual completo con una calidad de imagen buena con explicaciones en varios idiomas de los ajustes y detalles en conjunto un OK.
Text excerpt from page 20 (click to view)
Note : Clear RF signal waveform means that the shape � � � can be clearly distinguished at the center of the waveform.
RF signal waveform VOLT/DIV : 200mV TIME/DIV : 500ns
Procedure : 1. Connect oscilloscope to TP (TEO) and TP (VC). 2. Turned Power switch on. 3. Load a disc (YEDS-18) and playback the number five track. 4. Press the gG button. (Becomes the 1 track jump mode.) 5. Confirm that the level B and A (DC voltage) on the oscilloscope waveform.
1 track jump waveform center of waveform B 0V level=1.3±0.6Vp-p Specified level: �� � 100=less than ±22% A B symmetry A (DC voltage)
TP (FEO) TP (VC)
IC101
TP (RF)
TP (DGND)
6. After check, remove the lead wire connected in step 1. RF PLL Free-run Frequency Check Procedure : 1. Connect frequency counter to test point (XPCK) with lead wire.
BD board TP (XPCK) frequency counter
2. Turned Power switch on. 3. Put the disc (YEDS-18) in to play the number five track. Confirm that reading on frequency counter is 4.3218MHz.
