This comprehensive service guide serves as your unofficial service manual. It provides technical specifications, schematic analysis, calibration steps, and troubleshooting workflows to keep your station running safely. Technical Specifications & Overview
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Measure the resistance of the hot air element. Replace the element or the driving TRIAC on the PCB. Shorted air-pump TRIAC.
Have a correction or a detailed schematic to share? Leave a comment below or upload your Gordak 952 PCB photos to the EEVblog thread #Gordak-952-Repair. Gordak 952 Service Manual
Before opening the chassis of the Gordak 952, you must strictly adhere to the following safety protocols to prevent severe injury, electrocution, or permanent damage to the test equipment.
Over months of heavy usage, the analog dials on the Gordak 952 may drift out of alignment with the actual temperatures produced at the tips. Required Tools
Unplug the station before opening the chassis. Internal capacitors hold lethal voltages even when powered off. Never touch the heating elements during operation. Technical Specifications Overview This comprehensive service guide serves as your unofficial
| Pin | Hot Air Handpiece | Soldering Iron Handpiece | |-----|------------------------|--------------------------| | 1 | Heater (AC Live) | Heater (AC Live) | | 2 | Heater (AC Neutral) | Heater (AC Neutral) | | 3 | Thermocouple (+) | Thermistor (Signal) | | 4 | Thermocouple (-) | Thermistor (Ground) | | 5 | Motor (24V DC +) | Not used (or reed switch)|
A dedicated soldering tip thermometer (e.g., Hakko 191 or similar).
When turning off the hot air switch, let the system automatically run its cool-down cycle. The pump will keep blowing air until the element drops below 100°C. Switching the main power switch off prematurely traps residual heat, which instantly melts the plastic handle casing and destroys the element. Replace the element or the driving TRIAC on the PCB
To extend the life of your Gordak 952 station and avoid common failures:
If you are thumbing through a service manual, you are likely facing one of these three problems:
Unplug the iron. Measure resistance on the handpiece pins: Pins 4 & 5 (Heater) should read ≈is approximately equal to Ωcap omega . Pins 1 & 2 (Sensor) should read ≈is approximately equal to Ωcap omega
: A common design quirk in the Gordak 952 is that the transformer remains active even when the front switches are off. Technicians often modify the unit by adding a dedicated primary power switch to fully disconnect it from the mains when not in use. Troubleshooting Failure to Start : Check the 5V supply to the microcontroller. Verify the +/- supplies on the operational amplifiers.