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 50 (click to view)
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6.4 SYSTEM MICROCOMPUTER TEST PROGRAM
A
- PCL output
In the normal operation mode (with the detachable panel installed, the ACC switched ON, the standby mode cancelled), shift the TESTIN (Pin 86) terminal to H. The clock signal is output from the PCL terminal (Pin 37). The frequency of the clock signal is 312.5kHz that is one 4th of the fundamental frequency. The clock signal should be 312.5kHz. If the clock signal is out of the range, the X'tal (X601) should be replaced with new one.