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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!
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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.
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It paid to find this Service Manual, couldn't find it anywhere else. Exactly what I wanted. Received within 24 hours.
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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.
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Excellent printing quality. A complete and very useful manual with all details.
POWER SUPPLY DEFECTS (II)
No operation Stand-by Voltages OK
Check 4.2 VDC at pin 6 of IC101
NO
Check connection to R409 and R641
YES NO
Switch on the TV set. Check voltage 0.05 V pin 6 of IC101 and 0.28 V at R439
Check the voltage 3.3 V at pins 59, 66 of IC101 and pin 8 of IC402
YES
Check and replace IC101
POWER SUPPLY DEFECTS (III)
Stand-by Voltages are abnormal
Check the standby voltage (it should be 14.7V). This voltage is 20V-50V.
YES
Check and replace R617, R641, R626, T603, ZD603, T604, T605, T607, C621, C623
NO YES
Standby voltage is around 160 V instead of 14.7V
Check the voltage 4 VDC at the cathode of D615. Check and replace T605 and PH601
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