JVC SR-9090U instruction manual Introduction, Major Features, Periodical Maintenance, Precautions

Head drum

Video tape

1 INTRODUCTION

1-1 Major Features

→	For servicing
	See page 2-2 “MAINTENANCE AND CHECK”
	1 INTRODUCTION

1-2 Periodical Maintenance

5	Extended timelapse recording for up to 960 hours
	Recording times are selectable from 2 hours (SP mode),
	6 hours (EP mode) and 24/48/72/120/168/240/480/960
	(Timelapse mode) (when T-120 tape is used).
5	High-resolution recording
	Delivers horizontal resolution of more than 400 lines
	even in color mode.
	*When a tape recorded on this unit is played back on
	another VCR, noise may appear on playback picture.
5	High-density recording (HDR) function

5	Tape position search function
	You can automatically search the start of an alarm
	recording or search for a recording made at a specified
	date and time.
5	Recording check function
	Recording conditions (quality) can be checked at any
	time during recording by pressing the recording check
	button.
5	Operation lock system
	The secret operation lock system prevents an accidental

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.

Using the EP head, the tape is advanced at a fine pitch

for timelapse recording. In this way, about three times

more information is recorded in the same period than in

conventional timelapse modes. While this results in

some degradation of picture quality, the increased

coverage allows you to analyze the development of a

situation in greater detail. The actual recording duration

on the tape is the same as that of an ordinary timelapse

recording (select with menu switch <HDR>).

5 Alarm recording function

When an alarm signal is input in the Record mode, the

2/6-hour mode is automatically engaged. Alarm

recording time can be selected from 5, 10, 15, 30, 60,

120, or 180 sec., to tape end, or set manually.

An index code is automatically recorded at the start

point of the alarm recording for use as an alarm cue

signal. Alarm recording points can be accessed quickly

with the alarm search function.

5 Sensor recording

	or deliberate interference with VCR operation.
5	Camera switching signal output terminal
5	Warning function
	Error indications are shown on the front panel display.
	Error warnings include condensation and problems with
	cassette loading, cassette unloading, or the rotating
	system operation mode.
5	Operating mode-off video throughout function
	Even when the operating mode is off, the camera’s EE
	input can be output from the VCR.
5	Series recording function
	Two or more SR-9090U can be connected for extended,
	long-term series recording. As the tape in each VCR
	reaches the end, the next unit in the series will
	automatically start recording.
5	Automatic re-start of recording after a power failure
5	Time adjust function
	With the IN/OUT terminal for time adjustment, the time
	difference can be set to “0” with multiple SR-9090Us

Monitoring Usage Time

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 20) 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 in the shaded area indicate that maintenance should be performed.

Usage
time per	1 month	2 months	3 months	6 months	12 months
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

Periodic Maintenance

Check or replace the following mechanical parts according to the running time.

Running time	1000H	2000H	3000H	4000H
Drum ass’y (including heads)	^			
Pinch rollers	^			
Drive parts	^	^	^	

^: Cleaning

: Check or replace as required.  : Replace

•Maintenance requirements may vary depending on the operating environment and usage. The information above should be used as a reference guide.

Replace the built-in lithium battery approximately every two years.

Whenever an alarm signal is input in the Stop mode

(Stop, Timer Recording Standby or Operating Off

mode), the Record mode is automatically engaged.

5 Time/date generator

	connected. (adjustment time: 00:00/12:00)
5	Digital hour meter display
5	Repeat playback/recording
5	Alarm recording, tape end and warning electronic

1-3 Precautions

Handling and storage place

Superimposes date, month, year, hour, minute and

second on the image during recording. Also allows you

to display the number of alarms, alarm time, and the

number of the power failures on a monitor.

5 Timer-recording function

Up to 8 programs can be set for daily, weekly, or

weekday timer-recording. You can also set timer

recording for up to 16 days a year by specifying the date

(holidays, for example).

	buzzer
5	Recording control with external activation signal
5	Counter end function
5	External timer connection
5	Summer time compensation function
5	Wired remote control (optional)

Used when an optional SA-K97U RS-232C interface board is installed.

5RS-232C control

The SR-9090U can be controlled via a personal computer. Operation status can be monitored on the computer.

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.

5To avoid overheating the unit, do not block ventilation slots or stack the units. If the internal temperature rises too high, the tape may be damaged.

5Do not leave the unit in the Still or Record Pause mode for a long time as this may damage the tape.

After about 3 minutes, this unit automatically enters the Stop mode.

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.

Condensation

5 Condensation

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.

5 Condensation 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.

5If condensation has occurred

The VCR automatically ejects the cassette and the error indication “E-08” blinks on the display. Operation is disabled until the “E-08” indication on the display goes out.

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SR-9090U

REC

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