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 6 (click to view)
ADJUSTMENT
A MAIN C.B
MECHANICAL EXPLODED VEW 1/1
VR1
VOLUME
L104 IC1
PVC101 PVC1
2
L102 TC101 TC104 TC102
SFR51
3 2
TC103
L103
SFR 1 L105
PHONES J1
P HEAD
6
1
5 3
4
67
7 FWD
L101
(BAR ANT BAR ANT)
<TUNER SECTION>
1. AM IF Adjustment L105 ....................................................................... 455kHz 2. AM Frequency range Adjustment L104 .......................................................... 517kHz ± 5kHz TC104 ..................................................... 1770kHz ± 7kHz 3. AM Tracking Adjustment L101 ....................................................................... 600kHz TC101 .................................................................. 1400kHz 4. FM Frequency range Adjustment L103 .................................................. 87.0MHz ± 0.1MHz TC103 ............................................. 109.0MHz ± 0.1MHz 5. FM Tracking Adjustment L102 .................................................................... 88.0MHz TC102 ............................................................... 108.0MHz
<TAPE PLAYER SECTION>
6. Tape Speed Adjustment Settings : � Test tape : TTA�100 (Tape center) � Test point : PHONES JACK (J1) � Volume : NON-CLIP (MAX-10dB) � Function : TAPE � Adjustment location : SFR51 Method : Play back the test tape and adjust SFR51 so that the frequency becomes 3000Hz ± 10Hz(FWD). Then confirm WOW is less than 0.50%. 7. Head Azimuth Adjustment settings : � Test tape : TTA�330/TTA-420 � Test point : PHONES JACK (J1) � Volume : MAX � Function : TAPE � S-BASS : OFF � Adjustment location : Head azimuth adjustment screw Method : Play back the 8kHz signal of the test tape and adjust the screw so that the output becomes maximum.