Fm Control Signals Test 2; Eprom Checksum Test; Accumulator Tests; Accumulator Status Test - ELCOM Euro-500 Handy Series Service Manual

Euro-500TX Handy
Procedure:
1. Switch the ECR into programming mode.
2. Enter '740' using numerical keys.
3. Press the [Multiply] key.
Testing procedure:
1. In approx. 1.2 s intervals the FM-SEL, FM-PGM, and FM-DIR signals
levels are changed, altogether three times.
2. The test results appear on the display and are printed on the printer.
Correct values:
"log. 1" min.:
"log. 0" max.:
If these voltages do not correspond to the measured values, consult the
chapter 6.8 for further instructions.

5.6.5 FM control signals test 2

The FM control signals FM-SEL, FM-PGM, FM-DIR, FM-AH, FM-AL, and
A16 are vital for the proper FM data reading and writing. This test checks
the FM-AH, FM-AL, and A16 signals for proper signalisation. The voltage
values for these signals can be measured using a simple voltmeter.
Procedure:
1. Switch the ECR into programming mode.
2. Enter '750' using numerical keys.
3. Press the [Multiply] key.
Testing procedure:
1. In approx. 1.2 s intervals the FM-AH, FM-AL, and A16 signals levels are
changed, altogether three times.
2. The test results appear on the display and are printed on the printer.
Correct values:
"log. 1" min.:
"log. 0" max.:
If these voltages do not correspond to the measured values, consult the
chapter 6.8 for further instructions.

5.7 EPROM checksum test

This test calculates the EPROM checksum and both shows it on the display
and prints it out.
Procedure:
1. Switch the ECR into programming mode.
2. Enter '800' using numerical keys.
3. Press the [Multiply] key.
Testing procedure:
1. The ECR calculates the EPROM checksum.
2. The test is evaluated by short message on the display and is also
printed out.

5.8 Accumulator tests

5.8.1 Accumulator status test

This test shows the current voltage level of the internal accumulator on the
display and prints it out together with the information on the external power
supply connection.
Service manual
3.5 V
0.4 V
3.5 V
0.4 V
n A
mnp
l
© Elcom, s. r. o.
Successful test summary:
** TEST **
740
n A
msp
l
Successful test summary:
** TEST **
750
n A
rpp
l
Successful test summary:
** TEST **
800 41DB
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