This document is a Service Manual for a Mini Component Sound System, specifically models XG-645, XG-646, XG-647, XG-648, and XG-6483, manufactured by DAEWOO DAT CO., LTD. in May 2006. The manual provides comprehensive information for servicing and maintaining these audio systems.
Function Description:
The device is a mini component sound system, designed for audio playback and likely includes features such as CD/MP3 CD playback, radio tuning, and potentially USB connectivity. The internal structure is broken down into several functional sections:
- FRONT Section: Likely handles user interface, display, and front panel controls.
- FUNCTION Section: Manages overall system operations, input selection, and processing.
- MP3 CD Section: Dedicated to reading and playing MP3 and standard audio CDs, including CD-R/RW compatibility.
- AMP Section: Responsible for amplifying audio signals to drive speakers.
- POWER Section: Provides power supply to all components of the system.
- USB Section: Suggests support for USB devices, likely for playing audio files.
Important Technical Specifications (derived from part lists):
The manual includes detailed electrical part lists for various PCB assemblies, offering insights into the components used:
PCB FUNCTION ASS'Y (XG-645/6/7/8/83):
- PCB Dimensions: 197 X 122 X 1.6T
- Diodes: KDS160 (SW CHIP), UDZ5.1B 17X12, UDZ3.6B 17X12 (ZENER CHIP)
- Transistors: KTC3875Y (TR CHIP)
- ICs: NJM4558M (PROCESSOR), BD3401KS2 (PROCESSOR)
- Jacks: RCA (S-436P RED-WHITE, RCA-108 YW)
- Tuner Module: KST-ML104MV1-E66
PCB MP3CD ASS'Y (XG-645/6/7/8/83):
- PCB Dimensions: 96X96X1.6T FR-4
- Diodes: UDZ5.6B 17X12, UDZ3.9B 17X12 (ZENER CHIP)
- Transistors: KRC107S, KRA107S, KTD1304, KTA1504Y (TR CHIP)
- ICs: LC78691E (CD MP3), BA5927FM (MOTOR DRIVE), LC87F14C8A (USB DECODER)
- Coils: HRF8000-CA (R CHIP), HLC220J03A (22uH CHIP COIL 2012)
- Crystals: 5XJ16R934C (16.9344MHz 20PPM), 5XE12M000J (12.000MHz)
PCB USB ASS'Y (XG-6483, XG-645/6/7/8):
- PCB Dimensions: 247 X 163 X 1.6T
- Jacks: RCA-308HG (video Jack), USAF-046N-WP-01 (USB Jack)
- Switches: SKQNAED010 (TACT)
PCB FRONT ASS'Y (XG-6483, XG-645/6/7/8):
- PCB Dimensions: 247 X 197 X 1.6T
- Display: HNA-15MM38 (VFD)
- Diodes: KDS160 (SW CHIP)
- Transistors: KTC3875Y, KRC107S, KRC111S, KRA111S, KTD1304 (TR CHIP)
- ICs: NJM4558M, LC876B48C, M24C04MN SOP, MSGEQ5A, HCF4094M013TR, BA4560F (H/P AMP), HK381BT-DW (PRE AMP)
- Jack: HTJ-035-18A (H/P)
- Switches: SKQNAED010 (TACT)
- Volume/Mic Controls: XV09211NPV20F1B50K (VOL MIC)
- Encoder: RE0123PVB25FINB 1-2-24 PCE (SW ENCODER)
- Resonator: ZTT10.00MT (10MHz, 3PIN)
- Crystal: C38T 32.768KHz 20PPM
PCB POWER ASS'Y (XG-6483, XG-648, XG-647, XG-646):
- PCB Dimensions: 197X139X1.6T CEM-1
- Capacitors: DE1307E 472M VA1-KC (FORMING) (C LINE ACROSS)
- Cord: KKP 419C KLCE-2F 0.75 SQU (AC CORD)
- Diodes: RL202, KBJ604G, KDS160 (SW CHIP), 1SR154-400 4526 (RECTIFIER), UDZ12B 17X12, UDZ30B 17X12, UDZ10B 17X12, RLZ5.6B (ZENER CHIP)
- Fuses: VDE N/T 1.25A 250V (XG-645), VDE TL 1.6A 250V MF51 (XG-646), VDE TL 2.5A 250V MF51 (XG-647), VDE TL 3.15A 250V MF51 (XG-648/6483)
- Transistors: KTC3875Y, KRA111S, KRC107S, 2SA2071, 2SC5824, KTA1046Y (TR CHIP)
- ICs: L4959, AIC1117-CY (REGULATOR)
- Transformers: EI=74X42 127/220V, 60/50Hz (XG-645), EI=66X45 230V/50Hz (XG-646), EI=74X52 230V/50Hz (XG-647), EI=74X62 230V/50Hz (XG-648/6483), EI=28X12 230V 50HZ (TRANS POWER)
- Resistors: 1/2W 4.7M OHM J (METAL FILM), 1W 0.47 OHM (FUSEABLE)
- Relay: SDT-S-105LMR (SW RELAY)
Usage Features:
The manual emphasizes several safety precautions for proper usage:
- Environmental Considerations: Avoid exposure to rain or moisture, do not use near water sources, and ensure proper ventilation to prevent overheating. The appliance should be situated away from heat sources.
- Mounting: Can be used with a cart or stand, or mounted to a wall or ceiling as recommended by the manufacturer.
- Power Supply: Connect to the specified power supply type. Power cords should be routed to prevent damage. Unplug during long periods of non-use.
- Antenna Grounding: For outdoor antennas, proper grounding according to NEC Article 810 is crucial for protection against voltage surges and static charges.
- Object and Liquid Entry: Care should be taken to prevent objects or liquids from entering the enclosure.
Maintenance Features:
The service manual is primarily for qualified service personnel, indicating that most maintenance tasks require professional expertise.
- Servicing: Only qualified service personnel should remove covers or attempt repairs. The user should not attempt to service the appliance beyond what is described in the operating instructions.
- Troubleshooting: The manual outlines conditions that require service, such as damaged power cords, objects/liquids entering the appliance, rain exposure, abnormal operation, or physical damage.
- Cleaning: The appliance should be cleaned only as recommended by the manufacturer.
- Laser Safety: The unit employs a laser, and only qualified service personnel should handle it to avoid eye injury. Use of controls, adjustments, or procedures other than those specified in the manual may result in hazardous radiation exposure.
- Replacement Parts: If replacement of the plug is required, a service technician must use a replacement plug specified by the manufacturer with the same overload protection. The appendix includes a detailed electrical part list for various PCBs, which is essential for component replacement during maintenance.
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