The purchased manual is an scan of the original Panasonic paper-based Service Manual. Unfortunately the contrast is not perfect, but I am satisfied anyway!
The purchased manual is an high-quality scan of the original JVC paper-based Service Manual. The Service Manual includes the Owner´s Manual, so you do not have to buy both of them.
Complete manual with clear schematic diagrams and printed circuit board layouts of two variants of the headset and the transmitter an old and a new version.
Also shows how the headset and the transmitter is opened and how transmitter and receivers can be adjusted and where to measure.
I had no problems to repair the headset using this service manual.
Excellent printing quality. A complete and very useful manual with all details.
Text excerpt from page 58 (click to view)
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6.4 FREQUENCY CHECK FOR CLOCK
A
- PCL output
In the normal operation mode (with the detachable panel installed, the ACC switched ON, the standby mode cancelled), shift the TESTIN terminal (IC601 Pin 86) to H. The clock signal is output from the PCL terminal (IC601 Pin 37). The frequency of the clock signal is 625.0kHz that is one 32th of the fundamental frequency. The clock signal should be 625.0kHz. If the clock signal is out of the range, the X'tal (X601) should be replaced with new one.