These ICs compare the user-defined temperature set on the front potentiometers with the feedback from the thermocouples inside the heating elements.
The Gordak 952 relies on an analog-driven feedback loop rather than complex microprocessors. This makes it highly repairable. Opening the chassis reveals three main modules: the main power board, the control board, and the diaphragm air pump. 1. The Main Power & Control Circuit
The is far more than a technical document; it is an instrument of empowerment. For anyone who relies on this versatile 2-in-1 soldering and rework station for their livelihood or passion, the manual is an essential companion. With detailed schematics and a systematic approach to troubleshooting, it equips you to diagnose the root cause of a problem rather than just addressing the symptoms.
| Feature | Specification | | :--- | :--- | | | 230 V AC, 50/60 Hz | | Hot Air Power | 270 W | | Hot Air Temp. Control | 150℃ – 500℃ | | Air Flow | 0.16–1.2 Nm³/h (Stepless) | | Soldering Iron Power | 60 W | | Soldering Iron Temp. | 200℃ – 480℃ | | Soldering Iron Heater | Ceramic | | ESD Safety (Soldering) | Ground Resistance < 200 mΩ | | Dimensions | 245(L) x 184(W) x 135(H) mm | | Gross Weight (6 units) | 28.8 kg | Gordak 952 Service Manual
Understanding the operational limits of the Gordak 952 is essential for diagnosing component failures and validating post-repair performance. General Specifications 220V AC $\pm$10% 50Hz (or 110V AC 60Hz) Total Power Consumption: ≈is approximately equal to 270 Watts (Max) Chassis Dimensions: 187mm (W) Weight: ≈is approximately equal to Hot Air Rework Section Power Output: 250W
Diaphragm pump (creates positive displacement air pressure) Pump Power: 45 Watts Hot Air Temperature Range: 150°C to 500°C
The AC voltage driving the hot air heating element is gated by a Triac (often a BTA12 or BTA16 ), isolated via an optocoupler (like the MOC3041 or MOC3021 ). These ICs compare the user-defined temperature set on
Measure resistance across the heater wires. If infinite, replace the ceramic core. Shorted triac supplying continuous 220V.
Issues with the digital display range from showing random numbers to complete failure.
Turn on the hot air gun and set the digital display to . Let the airflow stabilize for two full minutes. Opening the chassis reveals three main modules: the
Gordak 952 Service Manual: Comprehensive Maintenance & Repair Guide
Disconnect the main AC power cord completely before opening the chassis. High voltages (220V AC) are exposed on the power switch, fuse holder, main board traces, and pump connections.
Dual digital LED displays (on the 952-A variant) or analog dial readouts. Internal Architecture & Schematic Analysis
Insert the replacement element, reinstall the mica tube, and resolder the four connections.
+-------------------------------------------------------+ | AC Mains Input | | (110V/220V with Fuses) | +-------------------+-------------------+---------------+ | | v v +-----------------------+ +-----------------------+ | Isolated Transformer | | High Voltage Rails | +-----------+-----------+ +-----------+-----------+ | | v v +-----------------------+ +-----------------------+ | Low Voltage DC Rails | | Pump & Air Gun Triacs | | (+12V & +5V Regulated)| | (BTA08 / MOC3023) | +-----------+-----------+ +-----------+-----------+ | | v v +-----------------------+ +-----------------------+ | Control Line Logic | | Hot Air Heating Coil | | (LM555, LM324, OP-Amps| | & Diaphragm Pump | +-----------------------+ +-----------------------+ 1. Power Supply Stage