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49
Fehler-Analyse
a) Lötkolben
1. Potentialausgleich Null-Ohm zur Lötspitze
2. Sensor 22 Ohm
3. Heizung 12 Ohm
b) Versorgungseinheit
Prüfung gemäß Anleitung:
Meßpunkte gemessen zu Masse M
1. Trafospannung ca. 24 V
Bei fehlender Netzspannung Sicherung, Netz-
kabel, Trafo prüfen.
2. Versorgungsspannung ca. 5 V =
Bei fehlender oder zu großer Ver-
sorgungsspannung Regler 5 26 702 00 aus-
tauschen.
3. Sollwert (Potentiometer) ca. 2-5 V =
4. Wenn Istwert bei kaltem Lötkolben >3V,
Sensorleitung oder OP-Verstärker
5 26 700 00 defekt.
5. Zündimpuls ca. 1 ms ca. - 5 V
Bedingung für Zündimpuls Istwert < Sollwert.
Bei fehlendem Impuls Nullspannungsschalter
5 87 030 78 ersetzen.
6. Zündimpuls ca. 1 ms ca. 1,4 V
Wenn Impuls 5 V, Triac 5 26 706 00 ersetzen.
7. Für Potentialausgleich mit RC-Filter Draht-
brücke durchtrennen bzw. O-Ohm Widerstand
entfernen.
Défauts et remèdes
a) Fer à souder
1. Valeur entre borne d'équilibrage des potentiels
et panne du fer à souder: O Ohm
2. Valeur aux bornes du capteur de température:
22 Ohms (à température ambiante)
3. Valeur aux bornes de l'élément chauffant: 12
Ohms
b) Bloc d'alimentation
Contrôle entre les points suivants:
M et 1 Absence de tension: contrôler le fusible,
le câble d'alimentation et le transformateur
M et 2 Absence de tension fonctionnelle
(environ 5 Volts): remplacer le régulateur
5 26 702 00
M et 3 Suivant le réglage du potentiomètre: 2 à
5 Volts. Si valeur anormale, changer le
potentiomètre.
M et 4 Si la valeur excède 3 Volts pour un fer
froid, la ligne du capteur de température ou son
amplificateur (5 26 700 00) est défectueux.
Valeur effective à 20°C 1,6 Volt.
M et 5 -5 Volts - 1 milliseconde. Pour obtenir le
clignotement, il est nécessaire que la valeur
réelle soit inférieure à la valeur nominale. En
cas d'absence d'impulsion, remplacer le
commutateur à "tension nulle" 5 87 030 78.
M et 6 1,4 Volt - 1 milliseconde. Si la valeur de
l'impulsion atteint 5 Volts, remplacer le triac
5 26 706 00.
en 7 borne de mise à la masse: pour introduire
un filtre "r.c." de sécurité dans le circuit, couper
le pont existant sur le circuit imprimé.
Analisi delle disfunzioni
a) Stilo saldante
1. L'equalizzazione dei potenziali deve essere
Zero-Ohm verso la punta.
2. Il termo-sensore, misurato a 20°C, deve avere
una resistenza di 22 Ohm.
3. L'elemento riscaldante deve avere una
resistenza di 12 Ohm.
b) Apparecchiatura
Effettuare i controlli tra la massa M ed i seguenti
punti sullo schema elettrico:
1. Quando manca l'alimentazione (24 V)
controllare il fusibile, l'interruttore luminoso, il
cavo principale ed il trasformatore.
2. Quando non c'é tensione oppure quando
questa é superiore al valore normale di 5 V =
sostituire il regolatore 5 26 702 00.
3. Ruotando il potenziometro: da 2 a 5 V =. Se
differente sostituire il potenziometro.
4. Il valore reale del saldatore a 20°C deve
essere 1,6 V =: se è diverso, la linea del
termosensore oppure l'amplificatore - OP
5 26 700 00 sono diffettosi.
5. Le condizioni, perché si verifichino gli impulsi
di accensione, sono: valore reale della
temperatura < valore impostato. Quando
mancha l'impulso (5 V = per 1 ms), sostituire
l'interruttore di commutazione a zero,
5 87 030 78.
6. Se l'impulso è diverso da 1,4 V = per 1 ms,
cambiare il triac n. 5 26 706 00.
7. Equalizzazione dei potenziali: per usare il
filtro-rc rimuovere il ponte in corto o le
resistenze degli Zero-Ohm.
D
F
NL
I
Fout analyse
a) Soldeerbouten
1. Potentiaal vereffening
O-Ohm naar soldeerstift
2. Voeler 22 Ohm
3. Verwarmingselement 12 Ohm
b) Netvoedingseenheid
Testen volgens instructie:
Meetpunten gemeten aan massa
1. Transformatorspanning ca. 24 V (wissel)
Bij ontbrekende netspanning zekering
aansluitkabel, transformator controleren.
2. Voedingsspanning ca. 5 V = (gelijk)
Bij ontbrekende of te grote voedingsspanning
regelaar 5 26 702 00 vervangen.
3. Gewenste waarde (Potentiometer) ca. 2-5 V =
4. Wanneer de werkelijke waarde bij koude
soldeerbout > 3 V, voeler bedrading of OP -
versterker 5 26 700 00 defect.
5. Triggersignaal ca. 1 ms ca. 5 V
Voorwaarde voor triggersignaal
Werkelijke waarde < gewenste waarde. Bij
ontbreken van signaal nulspanningsschakelaar
5 87 030 78 vervangen.
6. Triggersignal ca. 1 ms ca. 1,4 V
Indien impuls 5 V, Triac 5 26 706 00 vervangen
7. Voor potentiaalvereffening met RC Filter
draadverbinding doorknippen of nul - Ohm
weerstand verwijderen.
WECP20.pm65 11.03.2002, 11:19 Uhr49
50


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