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.
This is a great site. I placed my order and by the next am it was available for download. Had some problems with some missing copy on some pages. Once I brought the error to the OMC's attention, the issue was resolved. I'll come back again.
Text excerpt from page 14 (click to view)
LZ-800W
ADJUSTMENT
X35 Gamma Timing Controller Circuit Adjustment Specification
Item 5. Gamma curve adjustment Power Supply Voltage: 14.4V Adjustment method/Adjustment value Conditions (6) Adjust GAMMA2 VR305 so the 7th step from the pedestal is 3.1V±0.1V. � Input signal Composite input (10 step signal) � Set to AC range � Oscilloscope 0.5V/DIV 4.0V 3.1V
(7) Adjust BLACK adjustment VR300 so the 3rd step from the pedestal is maximized.
4.0V MAX (8) Adjust CONTRAST adjustment VR304 so the 11th step from the pedestal is 3.7V±0.1V.
� Input signal Composite input (10 step signal) � Set to AC range � Oscilloscope 0.5V/DIV
4.0V
� Input signal Composite input (10 step signal) � Set to AC range � Oscilloscope 0.5V/DIV
3.7V
6. VCOM amplitude adjustment (COM-AC)
� Adjust COMAC VR303 so that the VCOM amplitude is as shown in the diagram below. 8.5V±0.1V 8.5V
� Input signal Composite input (10 step signal) � Set to AC range � 2V/DIV
7. VCOM center adjustment (COM-DC)
� Adjust COMDC VR302 so that the VCOM waveform is as shown in the diagram below. 1.5V±0.5V 1.5V GND
� Input signal Composite input (10 step signal) � Set to DC range
�The flicker adjustment is done with the main unit procedure.
