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6
MAINTENANCE
6.1 Cleaning
1. Do not attempt to disassemble your VLR-100 to clean it.
2. Clean your VLR-100 using only a damp cloth.
3. NEVER use water or solvents such as alcohol, window cleaner, etc., to clean your VLR-100.
6.2 Service and Troubleshooting
If you suspect your VLR-100 is not operating properly, check the following:
1. Check all cables for opens or shorts.
2. If using an AC power adapter different from the one supplied with the VLR-100, make sure it supplies the VLR-100 with at
least 9 volts (maximum of 14 volts) when the VLR-100 is switched on.
You may return your VLR-100 to HORITA for service. Please contact HORITA Co. first, either by phone or mail, before
returning your unit.
6.3 Adjustments
Internal jumper selections are provided for LTC OUT rise time control, VITC backup limits, VITC-to-LTC translation options,
and time code frame digit blanking.
To access these jumpers, remove the top cover from the VLR-100 by removing the six hex screws. The locations of these
jumpers are shown in Figure 6-1.
LTC OUT
FRAMES
<1/5VITC
LTCOUT F&R
SRH OFFSET
Figure 6-1, Jumper Locations
LTC Output Rise Time Jumper
The LTC OUT jumper allows adjustment of the LTC output waveform rise time both when regenerating the reader LTC IN signal
and for the output of the LTC generator. With a shunt installed, the rise time of the LTC output is limited to 25uS, ±5uS. With
no shunt installed, wide band LTC is regenerated.
Factory setting is wide band (shunt removed).
<1/5 VITC Jumper
When automatic reader mode is selected (i.e., MODE in RDR position and SELECT in AUTO position), the "<1/5 VITC"
internal jumper further defines the switching behavior between LTC and VITC. With a shunt installed, the automatic backup of
the LTC reader by the VITC reader is restricted to tape speeds below 1/5th times play speed. When no shunt is installed, VITC
can backup LTC at all tape speeds. Note that this jumper has no effect on VITC-to-LTC translation.
Factory setting is VITC backup at all tape speeds (shunt removed).
LTCOUT F&R Jumper
The "LTCOUT F&R" jumper controls the allowable direction of the generated LTC OUT during VITC-to-LTC translation. With