Giradischi Technics SL-QD22: Smontaggio Riparazione CUEING Lampeggiante (Parte 2)

Technics SL-QD22 Turntable: Cueing Repair Disassembly (Part 2) PCB Capacitor Replacement with Flashing Cueing Light Problem - Let's take a look at how to disassemble the 1987 Technics SL-QD22 Turntable. We will find out what problems I encountered by following the disassembly procedure to access the PCB and the motor that controls the cueing and stop (self return) of the arm. In particular, we will see which capacitors need to be replaced to restore the correct operating values and the correct procedure for disassembling it. In particular, we will check the PCB and the two capacitors, which allow the electronics, which, together with the motor, control and allow us to automatically raise the arm on the vinyl record by means of the cueing button, to operate at full power. We will then verify the functioning of the auto-stop and automatic return, by means of a procedure to calibrate the gear of the arm motor, so that, once the record is finished, the stylus does not stay down and the platter continues to turn without stopping and without returning the arm to its initial rest position. What problems can I encounter with the Technics SLQD22? The cueing button and indicator light not lighting up properly and not allowing the arm to be raised and lowered properly; Problems with the cymbal stop; Problems with the auto-stop function and automatic arm return; Platter stop. Exhausted capacitors. Cueing light flashing Locked arm _______________________________________ Technical Data Sheet Turntable Technics SL-QD22: _______________________________________ Technics SLQD22 Semi Automatic Turntable (1986-1990) -General Manufacturer: Technics Model: SL-QD22 Years of manufacture: 1987 to 1993 (approx. data) Manufactured in: Osaka, Japan Color: Technics black Power consumption: 8 W Dimensions (WxHxD): 430 x 100 x 375 mm (with open lid: 430 x 100 x 410 mm) Weight: 4,5 kg -Connections Outputs: 2x RCA Cinch, 1x GND Grounding -Technical Data Drive: direct drive Drive control: Quartz control Motor: commutatorless DC motor Speed: 33-1/3 and 45 rpm Synchronous fluctuations: 0.012% (at the motor), or 0.025% total WRMS Rumble noise ratio: 56 dB DIN-A, 78 dB DIN-B Turntable: aluminium injection moulding, diameter 31.2 cm Operating mode: semi-automatic (automatic return, automatic stop) Pitch: no Tonearm: statically balanced, straight tonearm. Insertable pickup, 230 mm long, 15 mm overhang. Tracking error 2°32' at record entry, 13.5g. Tracking force: 1.25g +/- 0.25g, cartridge weight: 6 g. Cartridge: Moving MM stereo cartridge with full lamella core. TP4 connection Frequency response: 10 Hz to 40 kHz 2.5V at 1 kHz Channel separation: 22dB at 1 kHz. Impedance: 47 kOhm - 100 kOhm Replacement needle: EPS-30ES _______________________________________ CHAPTERS: 0:00 INTRO SL-QD22 0:13 PCB CAPACITORS SL-QD22 1:33 CAPACITOR DE-SOLDERING 2:30 PCB REASSEMBLY 3:10 FIRST TEST 3:40 ARM MECHANISM CALIBRATION PROCEDURE 5:10 TEST AND RESET ARM POSITION 6:37 REPAIR CONSIDERATIONS 7:04 ARM HEIGHT CHECK 7:55 FINAL TEST _______________________________________