Daewoo MC-5911SC - User Manual

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Summary

Specifications

Test Conditions

Specifies test parameters like voltage, modulation, and load.

Summary

Specifications

Test Conditions

Specifies test parameters like voltage, modulation, and load.

This document is a service manual for the DAEWOO MC-5911SC Micro Component System, providing comprehensive technical details for maintenance and repair.

Function Description:

The DAEWOO MC-5911SC is a versatile micro component system designed for audio playback from multiple sources. It integrates an AM/FM analogue radio, a CD player, and an MP3 player with USB and SD/MMC card compatibility. Additionally, it features an iPod connection, allowing users to play audio from their Apple devices. The system is equipped with a remote control for convenient operation and includes a display for user interaction.

Important Technical Specifications:

The manual provides detailed specifications for the AM, FM, CD, and USB functions, ensuring technicians have the necessary information for troubleshooting and performance verification.

AM Tuner Specifications:

Frequency Range: 522 KHz to 1620 KHz (normal), with a tolerance of +/-5 KHz at the lower end and +/-10 KHz at the upper end.
Intermediate Frequency: 450 KHz.
Max Sensitivity: 54 dB/M at 603 KHz, 999 KHz, and 1404 KHz, with a limit of 60 dB/M.
Usable Sensitivity (20dB S/N): 55 dB/M at 603 KHz, 999 KHz, and 1404 KHz, with a limit of 68 dB/M.
S/N Ratio (@5mV): 35 dB at 999 KHz, with a limit of 30 dB.
6dB Bandwidth: 5 KHz at 999 KHz, with a range of 4-9 KHz.
ACA 10KHz: 20 dB at 999 KHz, with a limit of 10 dB.
IF Rejection: 39 dB at 603 KHz, with a limit of 24 dB.
Image Rejection: 40 dB at 1404 KHz, with a limit of 33 dB.
A.G.C. Figure of Merit (@100mV): 38 dB at 999 KHz, with a limit of 30 dB.
Distortion (30% MOD 100dB INPUT): 3% at 999 KHz, with a limit of 5%.
Hum/Noise Output (@VOL.MIN): 5 mV at 999 KHz, with a limit of 8 mV.
Fidelity (-6dB @5MV): 60-4000 Hz at 999 KHz, with a range of 100-3500 Hz.
Power Output (@10% T.H.D): 7 W at 999 KHz.
VR.MAX.Distortion: 18%, with a limit of 25%.
Max Output Power: 10 W at 999 KHz.
Auto Tuning Stop (Seek) Sensitivity: 92 dB at 603 KHz, 999 KHz, and 1404 KHz, with a limit of 98 dB.

FM Tuner Specifications:

Tuning Range: 87.5 MHz to 108 MHz, with a tolerance of +/-0.5 MHz.
Intermediate Frequency: 10.7 MHz, with a tolerance of +/-0.1 MHz.
Max Sensitivity: 15 dB at 90 MHz, 98 MHz, and 106 MHz, with a limit of 20 dB.
Usable Sensitivity (30dB S/N): 18 dB at 90 MHz, 98 MHz, and 106 MHz, with a limit of 22 dB.
S/N Ratio (@1mV): 45 dB at 98 MHz, with a limit of 40 dB.
Hum Modulation (100dB INPUT): 42 dB at 98 MHz, with a limit of 37 dB.
(-3dB) Limiting Sensitivity: 22 dB at 98 MHz, with a limit of 26 dB.
IF Rejection: 60 dB at 90 MHz, with a limit of 40 dB.
Image Rejection: 30 dB at 106 MHz, with a limit of 25 dB.
AM Suppression (at 60dB INPUT): 45 dB at 98 MHz, with a limit of 30 dB.
T.H.D. (22.5KHz MOD. at 60dB INPUT): 3% at 98 MHz, with a limit of 5%.
Hum/Noise Output (@VOL.MIN.): 5 mV at 98 MHz, with a limit of 8 mV.
Freq. Response (-6dB 50us PRE-AMP): 50-5500 Hz at 98 MHz, with a range of 100-4000 Hz.
Separation (1KHz): 25 dB at 98 MHz, with a limit of 22 dB.
Power Output (@10% T.H.D): 7 W at 98 MHz.
Max Output Power: 10 W at 98 MHz.
Stereo Indicator Sensitivity: 18 dB at 98 MHz, with a limit of 25 dB.
Auto Tuning Stop (Seek) Sensitivity: 25 dB at 90 MHz, 98 MHz, and 106 MHz, with a limit of 30 dB.

CD & USB Specifications:

S/N Ratio (with JIS-A): 60 dB at 1 KHz, with a limit of 50 dB.
Channel Separation: 35 dB at 1 KHz, with a limit of 30 dB.
Channel Balance: +/-1 dB at 1 KHz, with a limit of +/-3 dB.
Distortion (1KHz-10DB): 3%, with a limit of 5%.
VR.MAX.Distortion: 18%, with a limit of 25%.
CD IN Frequency Response (1K=0dB): 0 dB at 127 Hz and 10 KHz, with a limit of +/-3 dB.
Hum & Noise (VOL.MIN): 3 mV, with a limit of 8 mV.
Hum & Noise (VOL.MAX): 8 mV, with a limit of 10 mV.
Interruption (without noise): 800 um (SBC-444A), with a limit of 700 um.
Black Dot (without noise): 800 um (SBC-444A), with a limit of 600 um.
Fingerprint (without noise): 65 um (SBC-444A).
10% THD Output Power: 7 W.
Maximum Output Power: 10 W.
Eccentricity (without noise): 140 um (TCD-712), with a tolerance of +/-15 um.
Access Operation Time: 3 sec (Philips NR5A), with a limit of 5 sec.
Access Operation Time (long): 7 sec (Philips NR5A), with a limit of 10 sec.
Audio Balance (FM 60dB/M INPUT 75KHZ DEV): 0 dB, with a limit of +/-5 dB.
Audio Balance (AM 74dB/M INPUT 60% MOD): 0 dB, with a limit of +/-5 dB.
Tape Play (MTT-112BN 0dB): 0 dB.
CD.Play (TCD 784 1KHZ 0dB): 0 dB, with a limit of +/-5 dB.
Record/Play Back (FM 1KHZ I/P 75KHZ DEV): 0 dB, with a limit of +/-5 dB.

Usage Features:

The MC-5911SC offers a user-friendly experience with its multi-source playback capabilities. The inclusion of a remote control enhances convenience, allowing users to operate the system from a distance. The front panel likely features intuitive controls for source selection, volume adjustment, and playback functions. The LCD display provides visual feedback on the current mode, track information, and radio frequency. The iPod connection, USB, and SD/MMC card slots provide flexible options for playing digital media.

Maintenance Features:

The service manual is a critical resource for maintaining the MC-5911SC. It includes:

Schematic Diagrams: Detailed circuit diagrams for the main board, tuner board, and other components, essential for understanding the electrical connections and signal paths.
PCB Drawings: Layouts of the printed circuit boards, aiding in component identification and placement during repair.
Exploded View: A visual breakdown of the device's physical components, facilitating disassembly and reassembly.
BOM (Bill of Materials): A comprehensive list of all parts, including part numbers, descriptions, specifications, and quantities, crucial for ordering replacement parts.

The BOM is categorized by different sections of the device, such as the main board, MCU, USB board, and key panel, making it easier to locate specific components. The detailed specifications for resistors, capacitors, IC chips, transistors, diodes, inductors, sockets, filters, and mechanical parts ensure accurate replacement. The inclusion of part descriptions like "Ceramic capacitor," "Elect. Capacitor," "Resistor," "IC chip," "TRANSISTOR," "diode," "SOCKET," and "Oscillator" helps in quickly identifying the type of component. Mechanical parts such as "screw," "rubber sheet," "speaker wire," "transformer," "speaker," "motor," and "CD mechanism" are also listed, indicating that the manual supports repairs beyond just electronic components. The "Unit" and "QTY" columns in the BOM are invaluable for inventory management and ensuring all necessary parts are available for a repair.