SECTION 1 SUMMARY CONTENTS PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS ..1-3 SERVICING PRECAUTIONS .................. 1-4 SERVICE INFORMATION FOR EEPROM IC SETTING(VCR) ........1-5 SERVICE INFORMATION FOR EEPROM (DVD) ............1-6 SPECIFICATIONS ....................1-7...
PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS CAUTION : DO NOT ATTEMPT TO MODIFY THIS PRODUCT IN ANY WAY, SUBJECT : X-RADIATION NEVER PERFORM CUSTOMIZED INSTALLATIONS WITHOUT MANUFAC- 1. BE SURE PROCEDURES AND INSTRUCTIONS TO ALL SERVICE PER- TURER’S APPROVAL. UNAUTHORIZED MODIFICATIONS WILL NOT ONLY SONNEL COVER THE SUBJECT OF X-RADIATION.
SERVICING PRECAUTIONS CAUTION : Before servicing the VCR+DVD covered by this Electrostatically Sensitive (ES) Devices service data and its supplements and addends, read and fol- Some semiconductor (solid state) devices can be damaged low the SAFETY PRECAUTIONS. NOTE : if unforeseen cir- easily by static electricity.
(Setup upon BOM depending on OPT0~OPT5 model) 12/26 - V00 <--- µ-COM Ver. • Since an initial remote control is set to LG for LG ID : LG model, appropriately set optiona data using the VERSION : 05 cursor Up/Down key.
SERVICE INFORMATION FOR EEPROM (DVD) POWER ON DETECT NEW EEPROM DVD LOGO Status (NO Disk status) (OPTION EDIT SCREEN) MODEL V9120W NAME Remotecontrol OPT 1 Pause key-->1-->4-->7-->2 in order. OPT 2 OPT 3 OPT 4 OPT 5 Press number 0~9, Press charater...
SPECIFICATIONS General Power requirements AC 220-230V, 50Hz Power consumption Dimensions (approx.) 430 X 78.5 X 265 mm (w/h/d) Mass (approx.) 4.0 kg Operating temperature 5°C to 35°C (41°F to 95°F) Operating humidity 5 % to 90 % Timer 24 hours display type RF Modulator UHF 22-68 (Adjustable) System...
SECTION 2 CABINET & MAIN CHASSIS CONTENTS EXPLODED VIEWS ........................2-2 1. Cabinet and Main Frame Section ...................2-2 2. Packing Accessory Section ....................2-3...
SECTION 3 ELECTRICAL CONTENTS OVERALL BLOCK DIAGRAM DVD PART ......3-2 VCR PART ELECTRICAL TROUBLESHOOTING GUIDE .................3-56 ELECTRICAL ADJUSTMENT 1. SYSTEM OPERATION FLOW ......3-56 PROCEDURES ............3-3 2. SYSTEM TEST FLOW ..........3-57 ELECTRICAL TROUBLESHOOTING DETAILS AND WAVEFORMS ON SYSTEM GUIDE ................3-4 TEST AND DEBUGGING ........3-63 1.
VCR PART ELECTRICAL ADJUSTMENT PROCEDURES 1. Servo Adjustment 1) PG Adjustment • Test Equipment a) OSCILLOSCOPE C) PAL MODEL : PAL SP TEST TAPE b) NTSC MODEL : NTSC SP TEST TAPE • Adjustment And Specification MODE MEASUREMENT POINT ADJUSTMENT POINT SPECIFICATION V.Out PLAY...
ELECTRICAL TROUBLESHOOTING GUIDE 1. Power(SMPS) CIRCUIT (1) No 5.3VA No 5.3VA Is the FR101 Replace the FR101 Normal? (Use the same ICW) Is the BD101 Replace the Normal? BD101 Is the R101 Replace the R101 Normal? Is Vcc (9V - 18V) sup- Is the D102 Check or Replace plied to IC101 Pin2?
(2) No 5.0V_D (3) No 5.0V_T No 5.0V_D No 5.0V_T Is the Vcc(5.3V) sup- Is the Vcc(5.3V) sup- Check or Replace Check or Replace plied to Q165 Emittor? the D125 the D125 plied to Q163 Emittor? Is the Q162 Base Is the Q162 Base Check the PWR CTL Check the PWR CTL...
(6) No Motor_Vcc (To Cap, Drum Motor ) (7) No REG 12V No Motor_Vcc No REG 12V Check or Replace Check or Replace Is the Vcc(14V) Is the Vcc(14V) supplied supplied to C134? to Q165 Collector? the D124 the D124 Is the Vcc(14V) sup- Check or Replace Check the PWR CTL...
2. SYSTEM/KEY CIRCUIT (1) AUTO STOP Auto Stop Does the SW25 waveform Check the Drum Motor appear at the IC501 signal. Pin23? Do T/UP Reel Pulses Do the T-UP Reel Pulses Does 5.0V appear at the appear at the Q514 Base appear at the IC501 Pin3? RS501? terminal?
3. SERVO CIRCUIT (1) Unstable Video in PB MODE Unstable Video in PB Mode. Does the Noise level of the screen change periodically? Does the CFG waveform appear at the IC501 Pin67? On tracking do the CTL Replace the IC501. pulses move? Does the Video Envelope Refer to “When the Y signal...
2. SERVO CIRCUIT (3) When the Capstan Motor doesn’t run, When the Capstan Motor doesn’t run, Refer to “SMPS(CAPSTAN/12Volt) Does 12VA appear at the PMC01? Trouble Shooting”. Does 2.8V appear at the PMC01? Check the PMC01 and the Capstan Does the PWM signal appear at the IC501 Pin33? Motor Ass’y.
2. SERVO CIRCUIT (4) KEY doesn’t working KEY doesn’t working. Is 5V applied to the IC501 Refer to “SMPS 5.3VA Pin36? Trouble Shooting”. Does LED or change Replace the defective when a function button is switches. pressed? 3-10...
4. Y/C CIRCUIT (1) No Video in EE Mode, No Video in EE Mode Does the Video signal Check the 19Pin of Tuner. appear at the IC301 Pin48? Is 5V applied to the IC301 Check the 5.0VT, 5.3VA Pins18, 24, 42, 55, 72, 91? Line.
3. Y/C CIRCUIT (2) When the Y(Luminance) signal doesn’t appear on the screen in PB Mode, Is 5.0VT, 5.3VA applied to the Check the line of the 5.0VT, 5.3VA Line. (Power Circuit) IC301 Pins24, 42, 55, 72, 91? Is the I C Bus siganl applied Refer to ‘SYSTEM I C BUS...
3. Y/C CIRCUIT (3) When the C(Color) signal doesn’t appear on the screen in PB Mode, Is 5.0VT/5.3VA applied to the Check the line of the 5.0VT/ 5.3VA Line. (Power Circuit) IC301 Pins24, 42, 55, 72, 91. Is the Color Rotary signal Check the Color Rotary applied to the IC301 Circuit.
3. Y/C CIRCUIT (4) When the Video signal doesn’t appear on the screen in REC Mode, Is the EE signal normal? Check EE Mode. Is 5.0VT/5.3VA applied to the Check the line of the 5.0VT/ IC301 Pins24,42,55,72,91? 5.3VA Line.(Power Circuit) Does PB Mdoe operate Check PB Mode.
5. Hi-Fi CIRCUIT (A) No Sound(EE Mode) No Sound. Check the TU Audio of IC801 Check the IC751 Pins30, 31. Pins2, 3. Check the DVD Audio of IC801 Check the DVD Audio OUT. (JK902 DVD_A_L_L/R). Pins4, 5. Check the AV1 Audio of IC801 Check the JK902.
3. Y/C CIRCUIT (B) Hi-Fi Playback PB mode No Sound. Check the Vcc of IC801 Check Power 5.0V, 12VT. (Pins34, 40) Check the Hi-Fi Selection switch. Check IC501 Pin26 (A.H/SW) (IC801 Pin41) and the Tape quality. Is the RF Envelope at IC801 Pin44 over 2Vp-p? Check IC801 Pin42(Data), Check the parts of µ-COM...
Hi-Fi REC. It can’t be recorded Hi-Fi Audio signal. Check Vcc of IC801.(Pins34, 40) Check Power 5V, 12V. Check ports of µ-COM. Check IC801 Pin42(Data), Pin43(CLOCK). (IC501 pins 17, 18) Check Audio input signal of IC801 Do Audio signals appear at IC801 Pins2, 3(TU.A.), 4, 5(DVD.A.), Pins16, 17? 6, 7(AVI.A.), 10, 11(AV2.A.).
6. Tuner/IF CIRCUIT (A) No Picture on the TV screen No picture on the TV screen Does the Video signal at Is 33VT applied to TU701 Check 33V line. the TU701 Pin19. Pin17? Is 5VT applied to TU701 Check 5V line. Pin4? Does the Clock signal Check the lIC Clock Signal...
(B) No Sound No Sound. Check the Vcc of IC751 Pins1, 11, 19, Check 5.0V Line. 22, 33. Check the Tuner SiF signal at IC751 Check the Tuner SIF of TU701 Pin22. Pin2. Check the oscillator of IC751 Pins5, 6. Replace X751 Check the IIC Clock and Data at IC751 Check the Audio of IC751 Pins30, 31.
2. Voltages are DC-measured with a digital voltmeter MODIFIED OR ALTERED WITHOUT PERMISSION IMPLEMENTATION OF THE LATEST SAFETY AND during Play mode. FROM THE LG ELECTRONICS CORPORATION. ALL PERFORMANCE IMPROVEMENT CHANGES INTO COMPONENTS SHOULD BE REPLACED ONLY WITH THE SET IS NOT DELAYED UNTIL THE NEW SERVICE TYPES IDENTICAL TO THOSE IN THE ORIGINAL CIR- LITERATURE IS PRINTED.
6. SYSTEM CIRCUIT DIAGRAM Deck will not operate. R575, R576, R577, R578 are defective. µ-COM is unstable. VCR will not operate. Q501, Q503 are defective. IC505 is defective. Auto Rew will not working. Auto stop occures. ES501, ES502, LD501 are RS501,RS502 are CLOCK SETTING will defective.
DVD PART ELECTRICAL TROUBLESHOOTING GUIDE 1. System operation flow Power On 1. 8032 initializes SERVO, DSP & RISC registers 2. Write RISC code to SDRAM 3. Reset RISC Show LOGO Tray Closed? Tray Close to Closed position SLED at Inner Side? SLED Moves to Inner Position 1.
2. SYSTEM Test flow TEST Check the AC Voltage Replace power PCBA or Power PCBA(110V or 220V) AC transformer. Switch on the Power PCBA Is the DC Voltage Repair or Replace Power PCBA outputs OK? (5V,1.8V,3.3V,8V,12V) Make sure the main PCBA don't short on VCCs and switch it on.
RESET or Power On. Check connection lines between FLASH Flash Memory operates Show LOGO? & MT1389 and the FLASH access time properly? whether is suitable or not. Check connection lines between SDRAM SDRAM works properly? & MT1389 and the SDRAM is damaged. MT1389 VIDEO outputs Check the related circuit of MT1389.
Does the SLED move Motor Driver STBY Check the connection line of to inner side when it is at Pin is High? STBY signal. outter position? Is FMSO DC Level higher Check the related circuit of than 1.4V? FMSO. SL+ and SL- output Check the amp circuit on motor properly? driver.
Check the laser power circuit Laser turns on when LD01 or LD02 output on MT1336 and connecting to reading disc? properly? power transistor. Collector voltage of Check the related circuit on power transistor is OK? laser power transistor Check cable connection between transistor ouput and pick-up head.
Proper signals on Check connections between Focus ON OK? A,B,C,D of MT1389 MT1389 and pick-up head. Check the FOSO connection on Check FEO signal MT1389 and motor driver. on MT1389 Check FOSO signal on MT1389 Check the related Normal TEO Signal on Track On OK? circuit on MT1389 MT1389?
Normal Audio output Audio DAC received Check connection between MT1379 when disc playback? correct data stream? &Audio DAC. Normal Audio DAC Check the related out? circuit of Audio DAC. Check Audio filter,amplify,mute circuit. Communications between Normal IR.VFD & Front Check communication lines on IR.VFD Front pannel key &...
DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING 1. SYSTEM 27MHz CLOCK, RESET, FLASH R/W SIGNAL 1) MT1389 main clock is at 27MHz(X501) 1.0V, 27MHz FIG 1-1 2) MT1389 reset is low active 5.2VA PWR_CTL M_RESET(FRONT) RESET Time FIG 1-2 3-63...
3) RS232 waveform during procedure(Downloading) FIG 1-3 4) Flash R/W enable signal during download(Downloading) FIG 1-4 3-64...
4. SLED CONTROL RELATED SIGNAL (NO DISC CONDITION) FMSO(2.0V/1.4V/1.0V) STBY(3.3V) SL+(4.7V/4.0V/2.6V) SL-(5.3V/4.0V/3.0V) FIG 4-1 5. LENS CONTROL RELATED SIGNAL(NO DISC CONDITION) FOSO(1.5V/1.4V/1.3V) F+(4.0V/3.6V/3.2V) F-(4.0V/3.6V/3.2V) FIG 5-1 3-66...
• CIRCUIT VOLTAGE CHART MODE MODE MODE MODE MODE MODE MODE MODE MODE STOP PLAY STOP PLAY STOP PLAY STOP PLAY STOP PLAY STOP PLAY STOP PLAY STOP PLAY STOP PLAY PIN NO. PIN NO. PIN NO. PIN NO. PIN NO. PIN NO.
SECTION 4 MECHANISM OF VCR PART(D-37) CONTENTS POSITION DRAWING OF DECK DECK MECHANISM ADJUSTMENT MECHANISM PARTS • Fixtures and tools for service ....4-12 1. Mechanism Assembly Mode Check ..4-13 • Top View............4-1 2. Previous Preparation for • Bottom View ..........4-1 Deck Adjustment ........4-14 3.
POSITION DRAWING OF DECK MECHANISM PARTS • Top View Order Of Dis- Ref. Posi assembled Part Fixing Type Draw- tion Parts firstly ings Disassembled 1 Drum Assembly 3 screws 2 Plate Top 2 hooks 3 Holder Assembly CST 6 chasses 4 Gear Assembly Rack F/L 1 hook 2,3,4...
DISASSEMBLY AND ASSEMBLY OF DECK MECHANISM Drum Assembly Cable Flat (S1) (S1) (S1) Cap, FPC Holder FPC Fig. A-1 Cautions in assembly of FPC 1. Disassembly of Drum Assembly (Figure A-1) 1) Separate cable flat from the Drum FPC and the Capstan Motor.
DISASSEMBLY AND ASSEMBLY OF DECK MECHANISM Plate Top (Fig. A-2-1) (B') Holder Assembly CST (Fig. A-2-2) Arm Assembly F/L (Fig. A-2-5) Lever Assembly S/W (Fig. A-2-6) (H4) Opener Door (Fig. A-2-4) (H3) Gear Assembly Rack F/L (Fig. A-2-3) Fig. A-2...
DISASSEMBLY AND ASSEMBLY OF DECK MECHANISM 2. Disassembly of Plate Top (Fig. A-2-1) 4. Disassembly of Gear Assembly Rack F/L (Fig. A-2-3) 1) Separate the right part while leaning back the (B) part of 1) Separate the hook (H3) while leaning ahead the hook (3) the plate top toward the arrow direction.
DISASSEMBLY AND ASSEMBLY OF DECK MECHANISM Arm Assembly Cleaner (Fig. A-3-3) (H5) Gear Wheel (Fig. A-3-2) Base Assembly A/C Head Motor Assembly L/D (S5) (Fig. A-3-5) (Fig. A-3-1) Head F/E (C1) (Fig. A-3-4) (S4) Fig. A-3 8. Motor Assembly L/D (Fig. A-3-1) 10.
DISASSEMBLY AND ASSEMBLY OF DECK MECHANISM Arm Assembly Tension (Fig. A-4-2) (H7) Reel T (Fig. A-4-3) Reel S (Fig. A-4-3) Spring Tension Brake Assembly T Spring Tension (Fig. A-4-1) (H8) (H6) Fig. A-4 13. Brake Assembly T (Fig. A-4-1) 15. Reel S/Reel T (Fig. A-4-3) 1) Release the spring tension from the lever spring hook 1) Disassemble the reel S/ reel T while holding it up (com- (H6).
DISASSEMBLY AND ASSEMBLY OF DECK MECHANISM Opener Lid (Fig. A-5-2) Arm Assembly Pinch (Fig. A-5-3) Base Assembly P4 (Fig. A-5-1) (H9) Arm T/up (Fig. A-5-4) Chassis Fig. A-5 16. Base Assembly P4 (Fig. A-5-1) 18. Arm Assembly Pinch (Fig. A-5-3) 1) Release the (A) part of the base assembly P4 from the 1) Hold the arm assembly pinch up.
DISASSEMBLY AND ASSEMBLY OF DECK MECHANISM Suppoter Capstan (Fig. A-6-1) Belt Capstan (Fig. A-6-2) Motor Capstan (Fig. A-6-3) Washer(W1) Clutch Assembly D37 (Fig. A-6-5) (L1) (L1) Lever F/R (Fig. A-6-4) Chassis (S6) Fig. A-6 20. Supporter, Capstan (Fig. A-6-1) 22. Lever F/R (Fig. A-6-4) 1) Turn the supporter and Capstan by 90 deg.
DECK MECHANISM DISASSEMBLY Gear assembly P2 Hole Gear assembly P3 Hole Gear Assembly P3 (Fig. A-8-2) Gear Assembly P2 (Fig. A-8-1) (H13) (H12) Lever Tension Boss Plate slider Hole(B) (H14) Base Loading (Fig. A-8-5) Chassis Base Assembly P3 (Fig. A-8-4) Base Assembly P2 (Fig.
DISASSEMBLY AND ASSEMBLY OF DECK MECHANISM Base Tension (Fig. A-9-1) Arm Assembly Idler Jog (Fig. A-9-2) Chassis Fig. A-9 34. Base Tension (Fig. A-9-1) 35. Arm assembly Idler Jog (Fig. A-9-2) 1) Release the (A) part of the base tension from the 1) Push both (B), (C) parts in Fig.
DECK MECHANISM ADJUSTMENT • Fixtures and Tools for Service 1. Cassette Torque Meter 2. Alignment tape 3. Torque gauge SRK-VHT-303(Not SVC part) Part No NTSC:DTN-0001 600g.Cm ATG Part No:D00-D006 PAL:DTN-0002 Part No:D00-D002 4. Torque gauge adaptor 5. Post height adjusting driver 6.
DECK MECHANISM ADJUSTMENT 1. Mechanism Assembly Mode Check Purpose of adjustment : To make tools normally operate by positioning tools accurately. Fixtures and tools used VCR (VCP) status Checking Position • Eject Mode • Blank Tape (empty tape) • Mechanism and Mode Switch (with cassette withdrawn) 1) Turn the VCR on and take the tape out by pressing the 4) Undo the screw fixing the deck and the main frame, and...
DECK MECHANISM ADJUSTMENT 2. Previous Preparation for Deck Adjustment (Preparation to load the VCR (VCP) with cassette tape not inserted) 1) Take the power cord from the consent. If doing so, proceeding to the stop mode is done. In this 2) Separate the top cover and the plate assembly top.
DECK MECHANISM ADJUSTMENT 4. Guide Roller Height Adjustment Purpose of adjustment : To ensure that the bottom surface of the tape can travel along with the tape lead line of the lower drum by constantly and adjusting and maintaining the height of the tape. 4-1.
DECK MECHANISM ADJUSTMENT 5. Audio/Control (A/C) Head Adjustment Purpose of adjustment : To ensure that audio and control signals can be recorded and played according to the contract tract by constantly maintaining distance between tape and head, and tape tension between the P3 post and the P4 post.
DECK MECHANISM ADJUSTMENT 5-2. Tape Path Check between Pinch Roller and travel it stably to ensure there is no crumbling or fold- ing of the tape. Take up Guide (Check in the Rev Mode) 1) Check the tape pass status between the pinch roller and 2) Check there is folding of the tape at the bottom or top the take-up guide.(Check there is crumpling of the tape of the take-up guide in cutting-off the REV mode...
DECK MECHANISM ADJUSTMENT 7. Adjustment after Drum Assembly (Video Heads) Purpose of adjustment : To adjust and stabilize the height change, X-distance change, etc depending on the guide roller after assembling the drum. Fixtures and tools used Connection position VCR (VCP) status Adjustment position •...
PROTECTION, MAINTENANCE AND CHECK OF VIDEO FUNCTION 1. Checking Points prior to Repair Following abnormal phenomena may be repaired by removal of foreign materials and oil supply. Check oiling is required at the checking set or cleaning status is complete. Determine that necessity of checking and repair the set exists after checking the using period of the set together with the user.
PROTECTION, MAINTENANCE AND CHECK OF VIDEO FUNCTION 2. Essential Check and Repair 4. Tools for Check and Repair Recording density of the video is far higher than the audio. (1) Grease: Floil G-3114 (KANTO) or equivalent grease Therefore video parts are very precise so as to allow only (Green) error of 1/1000mm or so in order to maintain compatibility (2) Grease: Kanto G-754, PL-433 (Yellow)
PROTECTION, MAINTENANCE AND CHECK OF VIDEO FUNCTION 5-2) Grease Applications (2) Regular Grease Application Apply grease to the designated application position (1) Grease Application Method every 500 hour. Apply grease by using a cloth swab or brush. Care must be exercised so that excess quantity should not be used.
PROTECTION, MAINTENANCE AND CHECK OF VIDEO FUNCTION Lever, F/R, Base, Tension GEAR AY, P2 & P3 PL-433 LEVER, F/R BASE, TENSION Clutch Contact Part (PL-433, Yellow) Tension Arm Party Hinge Part (PL-433, Yellow) 4-22...
MECHANISM TROUBLESHOOTING GUIDE 1.Deck Mechanism No Auto Rewind operates. Is output of the end sensor “H”? “H”: 3.5V or less “L”: 0.7V –1V or less Is the end sensor Vcc applied at Check the Syscon power supply. Replace the end sensor. Is voltage at both ends of the Replace the LED.
MECHANISM TROUBLESHOOTING GUIDE Auto Stop operates. (PLAY/CUE/REV) Check the assembly mode. Check the spring pinch. Does the pinch roller attached to the Capstan shaft turn in opera- Is output of the DFG, DPG Replace the drum motor. tion of the Play/Cue/Rev. normal? Does the T/UP or the supply Check the Servo, Syscon.
MECHANISM TROUBLESHOOTING GUIDE No tape winding is done in play. Is the pinch roller attached to the Check the assembly mode? Capstan shaft in operation of play? Does the T/up reel operate? Is the Capstan belt hung? Hang the Capstan belt. Check the clutch and the idler Does the Capstan motor turn? assembly.
MECHANISM TROUBLESHOOTING GUIDE 2. Front Loading Mechanism No cassette insert is done. Does the lever assembly Is the lever assembly switch Add or replace the lever switch operate? spring normal? assembly switches spring. Does the CST IN switch Replace the F/L switch. operate normally? Is the Vcc of the main P.C.B assembly?
MECHANISM TROUBLESHOOTING GUIDE No safe adherence of tape is done. Is cassette insert done? Does the opener lid operate? Replace the opener lid. Does the gear rack F/L operate? Replace the gear rack F/L. Does the opener door operate? Check the assembly status of the Does the arm assembly F/L operate? opener door.
EXPLODED VIEWS 1. Front Loading Mechanism Section 4-28...
DECK MECHANISM DISASSEMBLY MAIN BASE TRAY DISC DISC CLAMP ASSEMBLY PLATE CLAMP MAGNET CLAMP CLAMP UPPER (Fig. A) BASE MAIN HOLDER LEVER BASE MAIN BASE MAIN BOTTOM SIDE VIEW Fig. 5-1 Fig. 5-2 1. Main Base (Fig. 5-1) 2. Tray Disc (Fig. 5-2) 1-1.