6
5Recording Check function
Pressing the [REC CHECK] button during recording allows you
to check the status of the recording in progress. When
activated via the corresponding function menu switch, the built-
in head cleaner automatically cleans the heads whenever
inferior picture quality is detected during Recording Check.
After cleaning, the Recording Check operation is executed
again automatically (Auto Recording Check function).
5Operation lock system
To prevent accidental or deliberate interference with VCR
operation, a secret operation lock system is provided.
5Warning function
Error indications are shown on the front panel display.
5Power-off video throughput function
Even when the power is off, the camera's EE input can be
output from the VCR.
5Camera switching signal output terminal
5Automatic re-start of recording after a power failure
5Digital hour meter display
5Repeat recording/series recording function
5Recording control with external activation signal
5Alarm recording, tape end and warning electronic buzzer
5Summer time compensation function
5Wired remote control (optional)
5RS-232C control (with optional SA-K97U RS-232C interface
board installed)
The SR-L910E/EK can be controlled via a personal computer.
Operation status can be monitored on the computer.
524-hour long-time recording with a 180-minute tape
Recording times are selectable from 3 hours (SP mode) and
12/24 hours (Timelapse mode). Monitor image recording for up
to one-day (24-hour) is possible with a 180-minute tape.
5Audio monitoring
Audio signals can be recorded in the 12-hour/24-hour
Timelapse mode, as well as in the conventional 3-hour mode.
This strengthens surveillance capabilities by providing both
audio and video information.
5Alarm recording function
When an alarm signal is input in the Timelapse Record mode,
the 3-hour mode is automatically engaged. Alarm recording
time can be selected from 5, 15, 30, 60, 120, or 180 sec., to
tape end or set manually.
An index code is automatically recorded when alarm recording
starts. Used as an alarm cue signal, this allows quick access to
alarm recording points with the Index Search function.
5Sensor recording
Whenever an alarm signal is input in the Stop mode, the
Record mode is automatically engaged.
5Time/date generator
Superimposes the year, month, date, minute and second on
the image during recording. Also allows you to use the menu
screen to display the number of alarms, alarm time, and the
number of the power failures.
5Timer recording function
Two types of timer recording are available: based on the date
(up to 8 programs) or based on the day of the week.
1-1 Major Features
1 INTRODUCTION
1-2 Periodical Maintenance
This VCR incorporates precision mechanical parts which will collect dirt over time and ultimately deteriorate and wear out.
Over long periods of use, dirt and dust accumulates on the heads, drums and tape transport mechanisms. Dust which
penetrates the VCR (especially during outdoor use) also promotes the wear and deterioration of mechanical parts by causing
poor contact between tape and heads. This also prevents the VCR from maintaining video and audio quality at high levels. To
prevent wear and deterioration, clean the heads regularly using a head cleaning tape. However, because a head cleaning
tape alone cannot clean the entire tape transport mechanism, this should also be inspected periodically to prevent any
problems that could result from a sudden failure.
As replacement and adjustment of parts require advanced skills and specialized equipment, please contact the person in
charge of professional video equipment at your nearest JVC-authorized service agent for servicing.
Monitoring Usage Time Periodic Maintenance
The total operation time reached by an ordinary home VCR
in 5 or 6 years may be reached by a professional VCR in
as few as 5 or 6 months. Therefore, it is important that the
total hours of operation be carefully monitored. An hour
meter in the on-screen display (see page 18) shows the
accumulated time. In the chart below, the hours
accumulated in each month are shown in relation to the
number of hours used per day. Times shown inside
shaded area indicate that maintenance should be
performed.
Check or replace the following mechanical parts according
to the running time.
Usage
1 month 2 months 3 months 6 months 12 months
time per
day
2 hours 60 120 180 360 720
8 hours 240 480 720 1440 2880
12 hours 360 720 1080 2160 4320
24 hours 720 1440 2160 4320 8640
Running time 1000H 2000H 3000H 4000H
Drum ass’y (including heads) ^
Pinch rollers ^
Drive parts ^^^
•Maintenance requirements may vary depending on the
operating environment and usage. The information
above should be used as a reference guide.
^: Cleaning
: Check or replace as required.
: Replace
7
1-3 Precautions
5Handle the unit carefully
•Do not place anything heavy on the unit (a monitor,
etc.). A malfunction may occur.
•Do not put any foreign substance into the cassette
loading slot.
•Avoid violent shocks to the recording chassis during
transportation. Remove the cassette tape from the unit
for transportation.
5Turn off the power to save electricity when not using the
unit.
Handling and storage place
5Avoid using the unit in places subject to the
following conditions:
•extreme heat or cold
•strong magnetic fields (do not use a transceiver within
2 meters of this unit)
•high humidity
•dust and soil
•vibrations
•variations in temperature
5Use this unit in horizontal (flat position) only.
5Do not leave the unit in the Still or Record Pause
mode for a long time as this may damage the tape.
To minimize tape damage, this VCR automatically
enters the Stop mode after about 5 minutes have
passed in the Still or Record Pause mode.
Video cassette
•Only use video cassette bearing the
PAL
mark.
•To prevent accidental erasure of a recorded tape, break
the erasure prevention tab on the cassette. To use a
cassette with a broken tab, place a piece of cellophane
tape over the broken tab.
•Video cassettes cannot be used upside down.
•Leaving the tape in a partially wound condition for a long
time may damage the tape. Rewind the tape to the
beginning before storage.
Timelapse recording is performed over very long periods of time
which means that a durable tape is required.
•Use an E-180 tape or shorter.
•Do not use extended tapes (180 minutes or more such as E-240).
Erasure prevention tab
Condensation
5Condensation occurs in the
following cases.
•When the VCR is moved from a
cold place to a warm place.
•In a room that has just been heated
or in an area directly exposed to a
cooler.
•When there is excessive humidity
5When condensation is expected to occur
Turn the power of the VCR on before use.
5Condensation
When cold beer is poured into a glass, water drops
appear on the glass’s surface. This phenomenon is
called “condensation”. When condensation occurs on
the VCR’s head drum and tape guides it may damage
the tape.
Head drum
Video tape
1 INTRODUCTION
1-4 Daily Inspection
Although this unit has been designed for reliable operation
over a long period of time, a daily inspection is recommended
to ensure optimum performance. In particular, be sure to
check the repeat recording function on a daily basis.
Rewind the tape recorded the previous day for several
seconds.
Press the play button for playback.
Check that the playback picture is normal.
Check that the recorded date and time are correct.
•This unit includes a Recording Check function (using
the [REC CHECK] button) and an Automatic
Recording Check function for daily checking of
recording quality.
If any problems are found after inspection, turn the power off,
unplug the power plug from the AC outlet, and contact your
JVC dealer.
Inspection procedure
Turn on the power for all units connected to the
surveillance system.
Check the quality of the image shown on the monitor.
Check that the date and time shown on the monitor are
correct.