JVC HR-XV48EF Service Manual page 22

4.4 Electrical adjustment (DVD SECTION)
4.4.1 Test mode setting method
(1) Press POWER button to turn off the unit.
(2) Press the following remocon keys continuously within 2seconds " SET UP " → " 2 " → " 8 " → " ENTER ".
(3) The unit becomes JIG RCU mode.
(4) Press POWER button then press VCR/DVD repeatedly so that the DVD indicatorlights up.
(5) Press the POWER button again to turn off the unit.
(6) Transmit the code "43-FA" from the Jig RCU.
(7) The power supply of the unit turns on automatically then the FDP shows the region number.
(8) To release test mode, press POWER button of the front panel.
(9) Each pressing of DISPLAY (--:--) button of the remote controller in test mode changes the mode as follows.
TV MONITOR(Example)
FE/BE VERSION:4624/S2712
FE/BE VERSION:4624/S2712
CHECK MODE:CD LASER(NO DISC)
CHECK MODE:DVD LASER(NO DISC)
1-22 (No.YD051)
HR-XV48
**
NO DISC
HR-XV48
**
NO DISC
00:38
NO DISC
00:28
NO DISC
FDP(Example)
VCR