Prokit's Industries SS-207 - Manual (Page 7)

Troubleshooting Guide
Warning:
Disconnect the power plug before servicing. Failure to do so may result in electric shock. If the power cord
is damaged, it must be replaced by the manufacturer, its service agent or similarly qualified person in
order to avoid personal injury or damage to the unit.
Problem1.
The heater lamp does not light
up.
Check 1. If the power cord and/or connecting plug disconnected?
*Connect it.
Check 2. If the fuse blew and eliminate the cause, replace the fuse.
A. Is the inside of the iron short-circuited?
B. Is the grounding spring touching the heating element?
C. Is the heating element lead twisted and short-circuited?
Problem 2.
The heater lamp lights up, but
the tip does not heat up.
Check 3. Is the soldering iron cord broken?
*Refer to checking for breakage in the cord assembly.
Check 4. Is the Heating element broken?
*Refer to checking for breakage in the heating element.
Problem 3.
The tip heats up intermittently.
Refer to Check 3
Problem 4.
Solder will not wet the tip.
Check 5. Is the tip temperature too high?
*Set an appropriate temperature.
Check 6. Is the tip clean?
*Refer to Tip maintenance and Use.
Problem 5.
The tip temperature is too low. Check 7. Is the tip coated with oxide?
*Refer to inspect and clean the tip.
Check 8. Is the iron calibrated correctly?
*Recalibrate.
Problem 6.
The tip can not be pulled off. Check 9. Is the tip seized?
Is the tip swollen because of deterioration?
*Replace the tip and the heating element.
Problem 7.
The tip doesn't hold the desired
temperature.
Check 8
Checking for breakage of the heating element and cord assembly
Disconnect the plug and measure the resistance value between the connecting plug pins as follows.
If the values of 'a' and 'b' are outside the above value, replace the heating element (sensor) and/or cord
assembly .Refer to Procedures 1 and 2 If the value of C' is over the above value, remove the oxidization
film by lightly rubbing with sand-paper or steel wool the points as shown.
a. Between pins 1 & 5
(Heating Element)
11-16Ω
b. Between pins 2 & 4 (Sensor) 0.5Ω-1. 5Ω
c. Between pin 3 & Tip Under 2Ω
6