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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.
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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.
Alignment and Adjustments
4-3 CD
4-3-2 To Adjust Tracking Gain (PLAY mode)
1. 2. 3. Connect the GND terminal of the oscilloscope to Vref and (+) terminal to AP2. Load and play the disc While the disc is running adjust the gain with WVR1 as shown below. Normal frequency Low frequency High frequency
---0 V
---0 V
---0 V
WVR1 T.G
WVR2 WVR3 WVR4 F.G E/F. B F.B Vref
VOLT/DIV : 0.2V TIME/DIV : 2mS
VOLT/DIV : 0.2V TIME/DIV : 2mS
VOLT/DIV : 0.2V TIME/DIV : 2mS
4-3-3 To Adjust Focus Gain (PLAY mode)
1. 2. 3. Connect the GND terminal of the oscilloscope to Vref and (+) terminal to AP1. Load and play the disc While the disc is running adjust the gain with WVR2 as shown in the following figure. Normal frequency Low frequency High frequency
---250mV ---100mV ---0 V ---0 V ---100mV ---0V
VOLT/DIV : 0.1V TIME/DIV : 2mS
VOLT/DIV : 0.1V TIME/DIV : 2mS
VOLT/DIV : 0.1V TIME/DIV : 2mS
4-3-4 To Adjust E/F Balance (PLAY mode)
1. 2. 3. Set TIME/DIV of the oscilloscope to 2mS. Set Volt/DIV of the oscilloscope to 0.5V. Ground the scope input and set to DC and then set the DC range. Connect the GND terminal of the oscilloscope to Vref and (+) terminal to center to AP2. Load and play the disc. Turn WVR1 counterclockwise to the minimum value. Raise WVR3 and adjust the waveform so that its middle comes to GND of the oscilloscope (or until the upper half of waveform becomes symmetrical to the bottom half, A=B) Adjust WVR1 (arrow) for normal sound.
4-3-1 To Adjust FOCUS BIAS(STOP mode)
1. 2. 3. 4. Set Volt/Div of the oscilloscope to DC 100mV. Ground the scope input and set the waveform to 0V, DC range. Connect the GND terminal of the oscilloscope to Vref, and (+) terminal to center of AP1. Set WVR4 to 0mV.
4. 5. 6. 7.
A 0V B
A=B
8.
Samsung Electronics
4-3
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