MFJ IntelliTuner -991, Инструкция по эксплуатации

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MFJ-991 / MFJ-994 IntelliTuner Automatic Antenna Tuners Instruction Manual
©
2004 MFJ Enterprises, Inc.
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5. The reflected needle goes to the 3-watt mark. Now, press each of the front panel buttons in this
sequence: [C-UP], [C-DN], [L-UP], [L-DN], [AUTO], and then [TUNE]. The forward needle should
bounce once for each press, and the reflected needle should move up a division for each press.
6. The unit then tests its non-volatile memory. This will reset the unit to its factory default settings.
7. If the unit is okay, both meter needles will go to full scale. If there is a problem, the forward needle
will bounce and the reflected needle mark will indicate the failure.
8. Turn the tuner power off.
Failure
Message
Reflected
Needle (watts)
Indicates
C-UP FAIL 3 [C-UP] button is shorted or improperly connected.
C-DN FAIL 4 [C-DN] button is shorted or improperly connected.
L-UP FAIL 5 [L-UP] button is shorted or improperly connected.
L-DN FAIL 7.5 [L-DN] button is shorted or improperly connected.
AUTO FAIL
10 [AUTO] button is shorted or improperly connected.
TUNE FAIL 15 [TUNE] button is shorted or improperly connected.
MEMORY FAIL 20 Non-volatile memory circuitry is improperly connected.
WAKEUP FAIL 30 Microprocessor wakeup circuitry problem.
PD FAIL
40 Power down circuitry problem.
Table 3. Failure Messages.
Power-Down Circuit Test
When the 12 VDC power to the tuner is turned off, the tuner saves all settings to non-volatile memory.
The Power-Down Circuit Test checks the power down detection circuitry. It is recommended that this
test be done immediately after the regular self-test described above.
Note: The tuner must be reset to factory defaults before performing this test.
Here is the test procedure:
1. Make sure power to the tuner is off.
2. If the tuner has been reset to factory defaults, skip to step 6; otherwise continue with step 3.
3. Press and hold
both
the [TUNE] and [L-DN] buttons while turning the power on.
4. Release both buttons when both meter needles read full scale.
5. Turn the power off.
6. Press and hold
only
the [L-DN] button while turning the power on.
7. If the power down detection circuitry is okay, both meter needles will go to full scale. If there is a
problem, the forward needle will bounce and the reflected needle will read 40, per Table 3 above.
8. Turn the power off.