Eletech SV4000B Troubleshooting Manual

SV4000B/EM4000B Trouble Shooting Guide
1. There is no sound.
a. If the power light is off, make sure the power supply is within the specifications
and connected properly to the unit.
b. Adjust the volume control.
c. Make sure the message that you want to play has been recorded.
d. Manually activate the message by shorting the proper input to ground with a
piece of wire. If it works, then something is wrong with the triggering device.
e. Make sure the speaker is good.
2. The sound quality is poor.
a. If you use the internal microphone to record, the sound quality will not be as
good as if you use the line input. For best results, have the messages recorded
in a recording studio on a CD and use the line input to load them into the unit.
b. Re-record messages at a lower level. The sound will be distorted if the recording
level was too high.
3. There is a lot of background noise.
a. The internal microphone is very sensitive and likely to pick up lots of background
noises. For best results, have the messages recorded in a recording studio on a
CD and use the line input to load them into the unit.
b. Re-record messages at a higher level to reduce the relative background noise.
But don't increase the level too much or the sound will become distorted.
4. There is a clicking noise at the end of the message.
There will be a clicking noise at the end of the message if you use the internal
microphone to record. This is because when moved to the "PLAY" position (in order
to stop recording) the MODE switch generates a mechanical noise which is picked
up by the microphone. To avoid recording this noise, use the line input instead of
the microphone.
5. The unit plays a wrong sound.
a. Make sure the unit is configured for the desired mode (direct or sequential).
b. If you change the "number of messages" configuration (increase or decrease),
you need to re-record all the messages. For example, if you change the unit from
4 messages to 8 messages, you need to re-record the 4 messages that you may
have already recorded, in addition to recording new messages.
6. How to interrupt a message playback.
The only way to interrupt a message playback is to reset the unit by sending a pulse
to the reset input. However, if the sequential mode is used, the playback sequence
will start from message #1 after the reset.
Trouble Shooting Guide Trouble Shooting Guide
Trouble Shooting Guide Trouble Shooting Guide
SV4000B/EM4000B User's Manual
EM4000B = SV4000B (Circuit Board) + Metal Enclosure
Specifications
Operation: playback only
Digitization Method: analog storage, mono, 8 bit, 8 KHz
Maximum Number of messages: 8
Memory Type & Capacity: ISD (non-volatile)
SV4000B-4/EM4000B-4 = 4 minutes
SV4000B-8/EM4000B-8 = 8 minutes
Supply Voltage: 10 ~ 32 VDC
Audio Output: 40W (8 Ohm load), bridged output
SV4000B Dimensions: 5.6'' x 4.2''
EM4000B Dimensions: 6.0'' x 4.8'' x 1.7''
General Descriptions
EM4000B is a digital voice recorder capable of recording and playback of up to 8
different messages. It is totally self-contained and requires only a power supply, a
speaker and a few trigger signals to operate.
Messages are recorded into the unit via the internal microphone or the line input,
and can be re-recorded for virtually unlimited number of times. Thanks to the non-
volatile memory, messages are kept in the unit without battery backup.
Message playback is activated by sending a trigger signal to the proper input. The
trigger signal may come from a dry contact closure, a motion sensor, a PLC, or any
device capable of generating a electronic signal. Once started, a playback is not
interruptible and will stop at the end of the message automatically.
There are two different trigger modes: the direct mode and the sequential mode.
Direct Mode
Each message has its own trigger input. Message #1 (first priority) is activated via
the T1 input, message #2 (second priority) via the T2 input, and etc. If multiple
inputs are triggered at the same time, only the message of the highest priority will
play. Looping is possible by keeping the input triggered constantly.
Sequential Mode
All messages are activated sequentially via the T1 input, one message at a time.
Message #1 is played the first time, message #2 the second time, and so on. Loop-
ing is not possible.
Note that the unit will always try to play every messages before it restarts from #1,
even if some messages have never been recorded. For example, if the unit is config-
ured for 4 messages, the playback sequence will be: #1, #2, #3, #4, #1..., even if #4
has never been recorded. Therefore, the sequential mode is best used if all messages
are recorded.
User's Manual User's Manual
User's Manual User's Manual