Brand: SHARP
Category: Audio
Document Type: Manual
Language: EN
Available Languages: EN , ES
Manual for GX-CD30/30C/130/130C
Uploaded: Nov. 21, 2025, 7:52 p.m.
Warranty Information
No specific warranty information or period is detailed in this document.
Operation Summary
- CD Operation: Use the "STOP" button to enter CD mode. Then, release "STOP" and press "PAUSE" within 0.5 seconds to enter TEST MODE. The "UP/CUE" button moves the pickup outwards, and "DOWN/REVIEW" moves it inwards. "PLAY" turns the laser on and starts playback, "STOP" halts playback. "PAUSE" toggles the tracking servo.
- LCD Display in Test Mode: Displays will cycle through ①, ②, and ③ each time "UP/CUE" is pressed.
- Troubleshooting: Issues like CD function not working, CD keys not working, or playback problems are addressed with step-by-step checks involving power, microcomputers, waveforms, and specific circuits (Focus-HF, DRF signal, HF waveform, tracking system, spin system, VCO-PLL system). Cleaning the objective lens is a primary step.
- Packing Instructions: Details setting of switches and knobs, and lists packing materials like polyethelene bags, operation manual, feature labels, battery lid, power cord, packing add-ons, remote control, packing case, and speaker bags.
Troubleshooting and error codes
| Problem | Troubleshooting Steps |
|---|---|
| The CD function will not work. | The CD operating keys don't work. |
| Check the CD, DPS microcomputer (IC701), power supply, 4.19 MHz and 16.93 MHz clock, and reset terminal. | |
| Check the waveform of SCK, SO (DATA) and SI (COMM). | |
| See if the pick-up is in the pick-up in SW702 position. If OK, check the main microcomputer IC701. | |
| The CD operating keys work. | Check the Focus - HF system. |
| Playback can be performed without a disc. | |
| Does the pick-up move up and down twice? (Yes: Focus search OK. No: Check the area around IC804-B1801/CNS801.) | |
| Does the output waveform of IC801(16)(FD) match that shown in Fig. 10? (Yes: Check the IC801(50) (CLK) line, 4MHz. Check the microcomputer data on pins (51) (CL), (52)(DAT) and (53)CE. No: Check the area around IC804-B1801/CNS801.) | |
| Is the Focus servo active? (Can you hear it working?) (No: Check the laser diode driver. Yes: Check the area around IC801(16) - (21) (focus servo circuit).) | |
| Does the DRF signal change from "L" to "H"? (No: If the disc is not turning, the DRF should not change to "H". Yes: Check the spin system.) | |
| Playback can only be performed when a disc is loaded. | Is HF waveform normal (see Fig. 11-1, 2)? (No: Level is abnormal. Yes: Check the tracking system.) |
| Check the tracking system. Check waveform of IC801 pin 7 (TE). (No: Check the periphery of IC801 pins 41 and 42. Yes: Check the spin system.) | |
| The waveform shown in Fig. 11-3 appears, and no-disc state appears soon. (Yes: Tracking servo is inoperative. No: Check the periphery of IC801 pin 8 to pin 15, and IC804 to B1801/CNS801.) | |
| Checking the spin system. | Play operation is performed without disc. (Yes: The turntable rotates a little. No: The spin driver circuit is normal. Yes: The turntable fails to rotate or rotates at high speed. Yes: Check the periphery of IC801 pins 23 to 27, pin 39 and pin 40, IC802 pin 12 and pin 13, IC804 to B1803/CNS803.) |
| Checking the VCO-PLL system | Play operation is performed when disc exits. (Yes: Although HF waveform is normal, TOC data cannot be read. No: Check the PDO waveform (Fig. 12). Error: Check the IC801 pins 43 and 44, IC802 pins 3, 5, 7, 9 and 10.) |
| Although HF waveform is normal and the time indication is normal, no sound is emitted. | Check IC802 pin 48 (EFLG). (Yes: Check IC802 pins 37and 40. No: Usually, the number of pulses of flawless disc is 100 pulses/sec or less. Abnomal: Check the periphery of IC803 (OPAMP).) |