Table of Contents
Advertisement
MICRO COMPONENT SYSTEM
• CABINET
• TAPE DECK MECHANISM: AUTO STOP DECK
13. REPLACEMENT PARTS LIST
SPEAKER SYSTEM
2. SCHEMATIC DIAGRAM
3. EXPLODED VIEW/PARTS LIST
CONTENTS
- 2 -
3
5
6
8
11
14
19
20~23
20
21
22
23
24
25~26
25
26
27
38~40
38
39
41~52
53
53
54
Advertisement
Table of Contents
Related Manuals for LG FFH-171A
Summary of Contents for LG FFH-171A
-
Page 1: Table Of Contents
CONTENTS MICRO COMPONENT SYSTEM 1. SERVICING PRECAUTIONS 2. ESD PRECAUTIONS 3. SPECIFICATIONS 4. ADJUSTMENTS 5. MAJOR WAVEFORM 6. TROUBLESHOOTING GUIDE 7. BLOCK DIAGRAM 8. SCHEMATIC DIAGRAM 20~23 • FRONT & KEY CIRCUIT • AMP & DECK CIRCUIT • TUNER CIRCUIT •... -
Page 2: Servicing Precautions
SERVICING PRECAUTIONS NOTES REGARDING HANDLING OF THE PICK-UP 1. Notes for transport and storage 1) The pick-up should always be left in its conductive bag until immediately prior to use. 2) The pick-up should never be subjected to external pressure or impact. Storage in conductive bag Drop impact 2. - Page 3 NOTES REGARDING COMPACT DISC PLAYER REPAIRS 1. Preparations 1) Compact disc players incorporate a great many ICs as well as the pick-up (laser diode). These components are sensitive to, and easily affected by, static electricity. If such static electricity is high voltage, components can be damaged, and for that reason components should be handled with care.
-
Page 4: Esd Precautions
ESD PRECAUTIONS Electrostatically Sensitive Devices (ESD) Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive Devices (ESD). Examples of typical ESD devices are integrated circuits and some field-effect transistors and semiconductor chip components. The following techniques should be used to help reduce the incidence of component damage caused by static electricity. -
Page 5: Specifications
SPECIFICATIONS 1. AMP SECTION 1) Output Power(4Ω, 2ch, T.H.D 10%) 5W + 5W 2) T.H.D 0.15% 3) Frequency Response (3dB down) 40Hz~20kHz 4) Signal-to-noise Ratio 70dB 5) Input Impedance 47kΩ 6) Input Sensitivity 400±30mV 7) Separation(AUX) 100Hz/1kHz/10kHz 50dB/50dB/40dB 2. TUNER SECTION (1) FM(OIRT) 1) Frequency Range(50kHz or 100kHz Step) 65.0MHz~74MHz, 87.5MHz~108MHz... - Page 6 (4) LW 1) Frequency Range 153kHz~281kHz 2) Intermediate Frequency 450kHz 3) Usable Sensitivity 65dB 4) Image Rejection 254kHz 25dB 5) Signal-to-noise Ratio 200kHz 30dB 6) Distortion 200kHz 3. TAPE DECK 1) Tape Speed (MTT-111) 4.75 cm/sec 2) Wow Flutter (MTT-111) 0.25% 3) Fast Forward &...
-
Page 7: Adjustments
ADJUSTMENTS This set has been aligned at the factory and normally will not require further adjustment. As a result, it is not recommended that any attempt is made to modificate any circuit. If any parts are replaced or if anyone tampers with the adjustment, realignment may be necessary. - Page 8 TUNER ADJUSTMENT Item Test Point Adjustment Adjust for ± DC Voltage IC10 26, 28 pin 50mV Electronic FM Antenna OSCILLOSCOPE Terminal Signal Generator 26 , 28 PIN Unit Figure 2. Tuner(S curve) Adjustment Connection Diagram TAPE DECK ADJUSTMENT 1. AZIMUTH ADJUSTMENT Deck Mode Test Tape Test Point Adjustment...
- Page 9 CDP ADJUSTMENTS • When change the pick-up must be confirm as follow 1. TRACKING BALANCE CONFIRMATION 1) Connect the oscilloscope to TEO and REF.(IC501 pin 54 and 71) 2) Access from 1st selection to last section of test disc (YEDS-18) 3) Confirm the normal state of tracking error signal (T.B deviation : less than ±3%) OV(DC Mode) T.B deviation(%)
-
Page 10: Major Waveform
MAJOR WAVEFORM TRACKING ERROR(REW) TRACKING ERROR(FWD) TRIG 1=1.0V TRIG 2=1.0V ∆V1=0.00V ∆T=0.00ms ∆V1=0.00V ∆T=0.00ms ∆V2=0.00V SAVE ∆V2=0.00V SREF DLY>=0.85ms DLY>=0.85ms PEAKDET 1ms PEAKDET 1ms • Connection : 1. IC501 pin .(TEO) • Connection : 1. IC501 pin .(TEO) 2. IC501 pin 2. - Page 11 TRACKING COIL DRIVE E.F. BALANCE ∆V1=0.00V TRIG 1=-0.1V ∆T=0.000s ∆V1=3.96V TRIG 1=1.1V ∆T=0.00ms ∆V2=0.00V SAVE SAVE DLY>=0.425s DLY>=1.70ms PEAKDET 0.5s 50ms PEAKDET 2ms • Connection : 1. IC501 pin . (TEO) • Connection : 1. IC501 pin 2. IC501 pin •...
- Page 12 TRIG 1=1.1V ∆T=0.000s TRIG 1=24% SAVE ∆V2=0.000V DLY>=0.085s DLY>=0.670ms 0.5V PEAKDET 0.1s 50ms 50mV 0.5ms 0.5ms • Connection : 9. IC502 pin • Connection : 10. IC501 pin • Inspection : - Check IC501 pin to IC502 • Inspection : Check objective Lens of Pickup (Pattern defective) clear or not - Check voltage.
-
Page 13: Troubleshooting Guide
TROUBLESHOOTING GUIDE CD PART Is the function selector in the CD position? Is power turned ON? • Check power supply circuitry. Does initial reading occur? • Check laser circuitry. • Check focusing circuitry. • Check disc. Can disc be played? •... - Page 14 1. If initial reading is not carried out (with disc) Is IC601 pin 22 output Does disc motor rotate? • Leaf SW contact defective. waveform normal? • Connector defective. • Pattern short. Door open (3.2V~5V) Door close (1.9V~2.5V) Does laser light? Is HF Is tracking servo Is signal output...
- Page 15 When laser does not light IC601 pin : XLT Is below signal “H” at IC501 pin : XRST 38 (RESET)? : DATA : CLK Are data transferred from Has Pick-up returned to the • IC601 defective. IC601? innermost position? Is below signal output at IC502 pin 17, 18? •...
- Page 16 When laser light Is signal output at focus • IC501 defective. Do lenses move up and down? search terminal? • C527 defective. IC 501 pin 48 (FEO) Is signal output at IC502 pin 1 , 2 ? • IC 502 defective. •...
- Page 17 Is FER signal output? IC501 Pin 59? • IC501 defective. • Pick up defective. • Connector defective. Is FZC signal output at IC501 Pin 31 (SENS)? When Fok focus Servo Conform by • IC501 defective. FZC signal SENSE (ISTAT) Is Mon signal output by IC503 Pin 73? •...
- Page 18 LC72131, 72131M REFERENCE PHASE DETECTOR CHARGE PUMP DIVIDER XOUT SWALLOW COUNTER UNLOCK FMIN AOUT 1/16. 1/17 4bits DETECTOR 12bits PROGRAMMABLE AMIN DIVIDER DATA SHIFT REGISTER UNIVERSAL IFIN LATCH COUNTER POWER RESET TDA7440D MUXOUTL TREBLE(L) BIN(L) BOUT(L) L-IN1 100K L-IN2 100K SPKR ATT LOUT VOLUME...
- Page 19 KB9223(IC501) 80-QFP-1420C OVERVIEW The KB9223 is a 1-chip BICMOS intergrated circuit to perform the function of RF AMP and Servo signal processor for compact disc player application. It consist of blocks for RF signal processing, focus, tracking, sled and spindle servo. Also this IC has adjustment free function and embeded opamp for audio post filter.
- Page 20 PIN DESCRIPTION Pin No. Symbol Description Capacitor connection pin for mirror hold Capacitor connection pin for defect Bottom hold FRSH Capacitor connection pin for time constant to generate focus search waveform DCC2 The input pin through capacitor of defect bottom hold output DCC1 The output pin of defect bottom hold FSET...
- Page 21 PIN DESCRIPTION (Continued) Pin No. Symbol Description MDATA Micom data input pin Micom data latch input pin RESET Reset input pin MIRROR The mirror output for test The output pin of focus OK comparator SSTOP The pin for detection whether pick_up position is innermost or ton The noninverting input pin of sled servo amplifier The output pin of sled servo amplifier The inverting input pin of sled servo amplifier...
-
Page 22: Block Diagram
PIN DESCRIPTION (Continued) Pin No. Symbol Description The output pin of (AVEE+AVCC)/2 voltage VCC for RF part RF summing amplifier inverting input pin RF summing amplifier output pin The input pin for AGC The output pin for AGC The input pin for EFM comparating CAGC The capacitor connection pin for AGC Feedback input pin of E I/V amplifier for EF Balance control... - Page 23 LA1837 - 33 -...
- Page 24 KB9286 80-QFP-1420C DIGITAL SIGNAL PROCESSOR The KS9286 is a CMOS integrated circuit designed for the Digital Audio Signal Processor for Compact Disc Player. It is a monolithic IC that builts-in 16 bit Digital Analog Convertor, ESP interface and Digital De-emphasis additional conventional DSP function. FEATURES •...
- Page 25 PIN DESCRIPTION PIN NO SYMBOL DESCRIPTION AVDD1 Analog VCC1 DPDO Charge pump output for Digital PLL DPFIN Filter input for Digital PLL DPFOUT Filter output for Digital PLL CNTVOL VCO control voltage for Digital PLL AVSS1 Analog Ground1 DATX Digital Audio output data X’tal oscillator input XOUT X’tal oscillator output...
- Page 26 PIN DESCRIPTION (continued) PIN NO SYMBOL DESCRIPTION Latch Signal Input from Micom (Schmit Trigger) MDAT Serial data input from Micom (Schmit Trigger) Serial clock input from Micom (Schmit Trigger) I/O SRAM data I/O port 8 (MSB) I/O SRAM data I/O port 7 I/O SRAM data I/O port 6 I/O SRAM data I/O port 5 I/O SRAM data I/O port 4...
- Page 27 PIN DESCRIPTION (continued) PIN NO SYMBOL DESCRIPTION LOCK Output signal of LKFS condition sampled PBFR/16 (if LKFS is “H”, LOCK is “H”, if LKFS is sampled “L” at least 8 times by PBFR/16, LOCK is “L”.) PBFR Write frame clock (Lock: 7.35KHz) SMEF LPF time constant control of the spindle servo error signal SMON...
-
Page 28: Schematic Diagram 20~23
SPEAKER SYSTEM MODEL: FE-171E SPECIFICATION • TYPE : BASS REFLEX 1 WAY 1 SPEAKER SYSTEM • SPEAKER SYSTEM : WOOTER 100mm(4”) • FREQUENCY RESPONSE : 90Hz~20.000Hz • IMPEDANCE : 4Ω • S.P.L. : 86dB/W(1m) • RATED INPUT POWER : 5W •... - Page 29 EXPLODED VIEW/PARTS LIST RUN DATE : 03.MARCH.2003 LOCA.NO. PART NO DESCRIPTION SPECIFICATION REMARK 3701SM0016C NET ASSY FE-171E(FRAME/JERSEY)(LGEES) 3720SMM033C PANEL FRONT(FE-171E) LGEES 353M050C SCREW BH 3.5X16 FBK 6400SCSE04A SPEAKER,FULLRANGE CW-40SB05L SAMMI 4-0 OHM 5/10 4766SMN030A FELT W/F(FE-216E/170E) BLACK 4766SMN031A FELT DUCT(FE-216E/170E) BLACK 3091SMW025C CABINET ASSY FE-218E(LGEES)
- Page 30 BLOCK DIAGRAM - 19 -...
-
Page 31: Front & Key Circuit
SCHEMATIC DIAGRAMS • FRONT & KEY CIRCUIT NOTES : 1. Resistance values are indicted in ohms unless otherwise specified (K=1,000, M=1,000,000). 2. Capacitance values are shown in microfarads unless otherwise (P=MICRO-MICRO FARADS). 3. Schematic diagram for this model are subject to change for improvement without prior notice. - 20 -... -
Page 32: Amp & Deck Circuit
NOTE: Warning NOTE: Parts that are shaded are critical With respect 1. Shaded( ) parts are critical for safety.Replace only to risk of fire or electrical shock. with specified part number. 2. Voltages are DC-measured with a digital voltmefer • AMP & DECK CIRCUIT during Play mode. -
Page 33: Tuner Circuit
• TUNER CIRCUIT NOTES : 1. Resistance values are indicted in ohms unless otherwise specified (K=1,000, M=1,000,000). 2. Capacitance values are shown in microfarads unless otherwise (P=MICRO-MICRO FARADS). 3. Schematic diagram for this model are subject to change for improvement without prior notice. - 22 -... -
Page 34: Cdp Circuit
• CDP CIRCUIT NOTES : 1. Resistance values are indicted in ohms unless otherwise specified (K=1,000, M=1,000,000). 2. Capacitance values are shown in microfarads unless otherwise (P=MICRO-MICRO FARADS). 3. Schematic diagram for this model are subject to change for improvement without prior notice. - 23 -... -
Page 35: Wiring Diagram
WIRING DIAGRAM - 24 -... -
Page 36: Pcb Layouts
PCB LAYOUTS • MAIN P.C BOARD - 25 -... -
Page 37: Cdp P.c Board
INTERNAL BLOCK DIAGRAM OF ICs • CDP P.C BOARD KA3010D 28 27 26 25 24 23 22 21 20 19 18 17 16 15 LEVEL SHIFT LEVEL T S D SHIFT REGULATOR MUTE LEVEL LEVEL SHIFT SHIFT 100K 10 11 12 13 14 KIA7805 P/PI ~ KIA7824P/PI KIA6225S INPUT... -
Page 38: Exploded View/Parts List 38~40
EXPLODED VIEW/PARTS LIST • CABINET G034 G018 - 38 -... -
Page 39: Specification
• TAPE DECK MECHANISM: AUTO STOP DECK LOCA.NO. PART NO DESCRIPTION SPECIFICATION 6768R-HV01C DECK MECHANISM PARTS AP-4211(P.C.B) V/WOOD HEAD CS- 6768R-EV01A DECK MECHANISM PARTS A-13 V/WOOD HEAD ASSY CS-21 SE 6768R-RV01A DECK MECHANISM PARTS A-04 V/WOOD ROLLER CS-21 SERIE 6768R-UV01D DECK MECHANISM PARTS A-15 V/WOOD UNIT CS-21 SERIES 6768R-GV01B...