LG V190 Service Manual

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Owner's manual (36 pages)

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DVD-VCR

SERVICE MANUAL

MODEL : V190

CAUTION

BEFORE SERVICING THE UNIT, READ THE "SAFETY PRECAUTIONS"

IN THIS MANUAL.

P/NO : AFN31729558

DECEMBER, 2007

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Summary of Contents for LG V190

Page 1 Internal Use Only Website http://biz.lgservice.com DVD-VCR SERVICE MANUAL MODEL : V190 CAUTION BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS” IN THIS MANUAL. P/NO : AFN31729558 DECEMBER, 2007...
Page 2 SECTION 2..CABINET & MAIN CHASSIS SECTION 3..ELECTRICAL SECTION 4..MECHANISM OF VCR PART SECTION 5..MECHANISM OF DVD PART SECTION 6..REPLACEMENT PARTS LIST Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 3 • Insulation Checking Prodedure • Electrostatically Sensitive Devices SERVICE INFORMATION FOR EEPROM IC SETTING (VCR) ............1-5 SERVICE INFORMATION FOR EEPROM (DVD) ................1-6 SPECIFICATIONS ............................1-7 LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 4 THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 5 1Mohm. electricity sufficient to damage an ES device.) Note 1: Accessible Conductive Parts include Metal panels, Input terminals, Earphone jacks,etc. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 6 (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 model, appropriately set optiona ID : LG data using the cursor Up/Down key. VERSION : 05 DATE : 02.17.05...
Page 7 • NTSC model doesn’t have VCR option and use DVD option B~F as VCR option. (only DVD exist) • PAL model has another separate VCR option. (Both VCR and DVD exist) LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 8 1.0 Vp-p, 75 Ω, unbalanced (SCART) RGB output 0.7 Vp-p, 75 Ω *Design and specifications are subject to change without notice. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 10 SECTION 2 CABINET & MAIN CHASSIS CONTENTS EXPLODED VIEWS .............................2-2 1. CABINET AND MAIN FRAME SECTION ....................2-2 2. PACKING ACCESSORY SECTION......................2-3 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 11 THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 12 2. PACKING ACCESSORY SECTION 810 CABLE ASS'Y RF CABLE INSTRUCTION ASSEMBLY PLUG ASS'Y 1WAY BATTERY PLUG ASS'Y 2WAY REMOTE CONTROLLER PACKING, CASING PACKING, CASING Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 14 4. KEY / TIMER P.C.BOARD ......3-53 CIRCUIT DIAGRAMS ........3-77 1. MPEG CIRCUIT DIAGRAM......3-77 2. SERVO CIRCUIT DIAGRAM......3-79 3. JACK CIRCUIT DIAGRAM ......3-81 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 15 Stop the playback, then it goes out to PG adjusting mode after mony the PG data. • CONNECTION V.Out OSCILLOSCOPE CH1 CH2 H/SW(TP) R/C KEY H/SW V.out (TP) • WAVEFORM H/SW 6.5H(416us) Composite VIDEO LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 16 Is the D124 Replace the D124 Normal? Is the D121 Replace the D121 Normal? Power Line of Main PCB is short Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 17 1-4. No 3.8V No 3.8V Is the D123 Check or Replace the D123 normal? Power line of Main PCB is short LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 18 Q165 Collector? Is the Check the PWR CTL Vcc(14V) supplied to “H” signal from µ-com Q165 Base? Check or Replace the Q165 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 19 CST? Check the Deck Mechanism. Caution : Auto stop can occur because Grease or Oil is dried up LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 20 (PMC01) and the Drum appear at IC501 Motor Ass’y. Pin34? Aren’t the connecting patterns and the Components between IC501 Pin34 and PMC01 Pin12 short? Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 21 Capstan PWM signal appear at the IC501 Pin33? Aren’t the foil patterns and Components between IC501 Pin33 and PMC01 Pin9 short? LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 22 Refer to “SMPS 5.3VA Trouble Shooting”. Pin36? Does LED or FLD change Replace the defective switches. when a function button is pressed? Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 23 Emitter Line. (Power Circuit) at the Emitter terminal terminal of the Q309? of the Q309. Replace the Q309. LGE Internal Use Only 3-10 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 24 Check the path of the Y(Luminance) Video Y(Luminance) RF signal. waveform showed up (Check C327) at the IC301 Pin43? Replace the IC301. Copyright © 2007 LG Electronics. Inc. All right reserved. 3-11 LGE Internal Use Only Only for training and service purposes...
Page 25 Pin25 ? Does the Color signal Check the Color Pass. appear at the IC301 Pin21? Replace the IC301. Replace the IC301. LGE Internal Use Only 3-12 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 26 Check the circuit of the REC RF signal appear IC301 Pins85, 86. at the IC301 Pins88, 89,94,95? Check the Drum & Drum Connector Copyright © 2007 LG Electronics. Inc. All right reserved. 3-13 LGE Internal Use Only Only for training and service purposes...
Page 27 Check the Audio of Replace IC801. IC801 Pins16, 17. Check the Audio of Replace IC802. IC802 Pins1, 14. Check the JK902, SC901. LGE Internal Use Only 3-14 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 28 Signals appear at Check Power. Vcc of IC802 IC802 Pins11, Pin13. Replace IC802. Do Audio Signals Check the Jack(JK902) appear at JK902? Copyright © 2007 LG Electronics. Inc. All right reserved. 3-15 LGE Internal Use Only Only for training and service purposes...
Page 29 Replace IC801. signals appear at IC801 Pin36? Check the Contact Point of Drum Connector if good then Replace the Drum. LGE Internal Use Only 3-16 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 30 Video signal at the IC903 Pin6 to IC301 Pin61. IC903 Pin6. Check the signal flow from IC903 Pins26, 27 to SC901 Pin19. Copyright © 2007 LG Electronics. Inc. All right reserved. 3-17 LGE Internal Use Only Only for training and service purposes...
Page 31 Audio of IC802 Pins16, 17 to IC802 Pins11, 16. Pins3, 5. Check the Signal flow from IC802 Pins3, 5, SC901 Pins1, 3. LGE Internal Use Only 3-18 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 32 C110 C143,R143. R144.R145 Y-CAP PWR CTL BLOCK BR BL R146) C111 ERROR (Q162,C161,R164, (BK)(WH) PWR CTL' H' R163) (IC103) 3-19 3-20 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 33 AVCP IIC CLOCK /DATA DVD CLOCK DVD DATA DVD ENA IC 601 LED DATA, CLOCK MPEG BLOCK M_RESET TU701 3-21 3-22 LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 34 REAR JACK A R/L OUT V IN V OUT SC901 IC801 SCART JACK A R/L IN HIFI A R/L OUT 3-23 3-24 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 35 IIC_DATA EU1_A_OUT_R AUDIO IIC_CLK IC802 DVD_AUDIO_L A_ENV IC501 MM1231 MICOM DVD_AUDIO_R DVD OPAMP FR_A_IN_L MN101DF10G AUDIO FR_A_IN_R FRONT JACK 3-25 3-26 LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 36 IC801 TUNER HIFI VIDEO IN IC301 AVCP IC7V1 IC751 IIC CLOCK /DATA SDA5650X MSP3417/07 IC501 IIC CLOCK /DATA MICOM 3-27 3-28 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 37 Parts that are shaded are critical NOTE) with respect to risk of fire or NOTES) Symbol denotes DC chassis ground. NOTE) electricial shock. 3-29 3-30 LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 38 IC505 is defective. Auto Rew will not working. µ-COM will not operate. ES501, ES502, LD501 are X502 is defective. defective. WAVEFORM 3-31 3-32 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 39 Q302, Q303, Q314 are defective. No mono Audio Signal in PB MODE. Q306 is defective. WAVEFORM Normal Audio signal is not recorded. 3-33 3-34 LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 40 4. HI-FI CIRCUIT DIAGRAM IC801 Pins42, 43 aredefective. All Audio is not appear. Pin44 is defective. Hi-Fi Audio is not appear. 3-35 3-36 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 42 REC mode PB mode 5Vp-p 5Vp-p 340mVp-p 300mVp-p IC301 Pin 29 IC301 Pin 70 PB mode PB mode 400mVp-p 3.6Vp-p 3-39 3-40 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 43 0.17 0.08 3.38 3.17 3.37 0.04 3.28 3.26 0.12 3.33 3.08 0.99 0.99 1.02 0.01 0.01 0.01 0.04 0.19 3-41 3-42 LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 44 6.56 6.56 C941 5.07 5.07 2.86 0.02 2.71 6.08 6.08 0.01 0.01 C522 58 0 2.57 C945 0.01 0.01 3-43 3-44 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 45 0.74 0.01 0.01 0.74 0.01 Q913 0.01 0.74 0.01 0.01 0.74 0.01 Q914 5.06 3.41 2.72 5.06 3.41 2.72 3-45 3-46 LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 50 Q162, Q163, Q165. Is there a Check D121~D124 DC voltage at Cathode and replace. of D122,D123? Replace IC101, IC102, IC103. Copyright © 2007 LG Electronics. Inc. All right reserved. 3-55 LGE Internal Use Only Only for training and service purposes...
Page 51 2. System operation Routine Loop 1. Stop Playback & Open Tray 2. Display tray open message & LOGO Receive CLOSE Key? LGE Internal Use Only 3-56 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 52 3. Check FLASH R/W enable signal PRD, Update FLASH RWR. successfully? 4. Check RS232 signals. 5. Check FLASH Memory related circuit. Copyright © 2007 LG Electronics. Inc. All right reserved. 3-57 LGE Internal Use Only Only for training and service purposes...
Page 53 Check the Tray control Normal LOAD+ & amplifying circuit on Motor driver. LOAD- signal? Check the cable connection between main PCBA and loader. LGE Internal Use Only 3-58 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 54 Check the amp circuit Proper FACT+ & on motor dirver. FACT- outputs? Check cable connect on with pick-up head. Copyright © 2007 LG Electronics. Inc. All right reserved. 3-59 LGE Internal Use Only Only for training and service purposes...
Page 55 Check the spindle control SP+ & SP- output properly? amp circuit of motor driver. Check the cable connection between spindle and main PCBA. LGE Internal Use Only 3-60 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 56 TACT- output amp circuit on motor driver. properly? Check cable connection on pick-up head. Check RF signal waveform. Disc is play? Copyright © 2007 LG Electronics. Inc. All right reserved. 3-61 LGE Internal Use Only Only for training and service purposes...
Page 57 ZR36966. pannel key key & ZR36966 is functions? normally? Check the cable TEST END connection on Front pannel. LGE Internal Use Only 3-62 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 58 1-1. ZR36966 main clock is at 27MHz (X601) 3.1V, 27MHz FIG 1-1 1-2. ZR36966 reset is low active. 3.3VA PWR_CTL RESET RESET Time FIG 1-2 Copyright © 2007 LG Electronics. Inc. All right reserved. 3-63 LGE Internal Use Only Only for training and service purposes...
Page 59 2-1. SDRAM clock is at 143MHz CLK=143MHz, Vp-p=3.3V IC603 PIN38 FIG 2-1 3. TRAY OPEN/CLOSE SIGNAL 3-1. Tray open/close waveform OPEN CLOSE FIG 3-1 LGE Internal Use Only 3-64 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 60 3-2. Tray open waveform OPEN CLOSE FIG 3-2 3-3. Tray close waveform OPEN CLOSE FIG 3-3 Copyright © 2007 LG Electronics. Inc. All right reserved. 3-65 LGE Internal Use Only Only for training and service purposes...
Page 61 4. SLED CONTROL RELATED SIGNAL (NO DISC CONDITION) SLED_S DRVSB SLED+ SLED- FIG 4-1 5. LENS CONTROL RELATED SIGNAL (NO DISC CONDITION) FOCUS_S FOCUS+ FOCUS- FIG 5-1 LGE Internal Use Only 3-66 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 62 6. LASER POWER CONTROL RELATED SIGNAL (NO DISC CONDITION) DCLK=128MHz, Vp-p, Vmax=2.7V VR_CD DVD_LD CD_LD FIG 6-1 7. FOCUS ON WAVEFORM FOSO FACT+ FACT- FIG 7-1 (DVD) Copyright © 2007 LG Electronics. Inc. All right reserved. 3-67 LGE Internal Use Only Only for training and service purposes...
Page 63 FOCUS FACT+ FACT- FIG 7-2 (CD) 8. SPINDLE CONTROL WAVEFORM (NO DISC CONDITION) SPINDLE_S FIG 8-1 (DVD) LGE Internal Use Only 3-68 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 64 9. TRACKING CONTROL RELATED SIGNAL (SYSTEM CHECKING) TRACK_S TACT+ TACT- FIG 9-1 (DVD) TRACK_S TACT+ TACT- FIG 9-2 (CD) Copyright © 2007 LG Electronics. Inc. All right reserved. 3-69 LGE Internal Use Only Only for training and service purposes...
Page 65 10. RF WAVEFORM FIG 10-1 11. ZR36966 AUDIO OPTICAL AND COAXIAL OUTPUT (SPDIF) SPDIF FIG 11-1 LGE Internal Use Only 3-70 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 66 12. ZR36966 VIDEO OUTPUT WAVEFORM 12-1. Full colorbar signal (CVBS) JK702 Pin6 FIG 12-1 12-2. Y JK702 Pin7 FIG 12-2 Copyright © 2007 LG Electronics. Inc. All right reserved. 3-71 LGE Internal Use Only Only for training and service purposes...
Page 67 12-3. C JK702 Pin8 FIG 12-3 13. AUDIO OUTPUT FROM AUDIO PREAMP 13-1. AUDIO L/R JK702 Pins4, 5 FIG 13-1 LGE Internal Use Only 3-72 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 68 BLOCK DIAGRAMS 1. SYSTEM BLOCK DIAGRAM RAMDQM RAMDAT[00:15] FACT+/-,TACTT +/- MOT_SPDL +/- SLED+,SLED-- LOAD+/- DECK MECHANISM Copyright © 2007 LG Electronics. Inc. All right reserved. 3-73 LGE Internal Use Only Only for training and service purposes...
Page 76 34. Base Tension ..........4-12 1. Front Loading Mechanism Section ..4-29 35. Arm Assembly Idler Jog ......4-12 2. Moving Mechanism Section(1)....4-30 3. Moving Mechanism Section(2)....4-31 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 77 (1) When reassembling, confirm Mechanism and Mode Switch Alignment Position (2) When disassembling, the Parts in the "Starting No." column should be removed first." LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 78 3) Release the hooks (H1, H2) and separate both the holder FPC and the Cap FPC (disassemble if necessary). Holder FPC Assembly shape seen in the reverse direction Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 79 (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 LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 80 Assemble by inserting the left part after inserting the (E) part of the holder assembly CST into the groove on the (E’) part of chassis. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 81 1) Release the hook (H5) of the gear wheel and lift it upward. clockwise. 12. Base Assembly A/C Head (Fig. A-3-5) 1) Release a screw (S5) and disassemble while holding it up. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 82 Reel S Reel T CAUTIONS Spring used for both brake assembly T and arm assembly tension is used (2EA used). Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 83 For the assembly, check the (C) part of the arm assembly 2) Disassemble the opener lid upward while turning it pinch is assembled as in drawing. counter-clockwise. - REVERSE THE MECHANISM. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 84 1) Remove the washer (W1) and then disassemble it upward. 1) Separate the belt Capstan. 2) Undo 3 screws (S6) on the bottom side of chassis and disassemble it upward. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 85 30. Lever Brake (Fig. A-7-8) 26. Brake Assembly Capstan (Fig. A-7-4) 1) Disassemble the lever brake while lifting it up. LGE Internal Use Only 4-10 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 86 1) Release 3 hooks (H12, 13, 14) of the base loading, and then disassemble them upward. - Reverse the mechanism. Copyright © 2007 LG Electronics. Inc. All right reserved. 4-11 LGE Internal Use Only Only for training and service purposes...
Page 87 CAUTIONS Take care to ensure that the (D) part in the drawing is not hung on chassis in disassembly. LGE Internal Use Only 4-12 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 88 Part No:D00-D002 4. Torque gauge adaptor 5. Post height adjusting driver 6. + Type driver (ø5) Part No:D09-R001 Part No:DTL-0005 Copyright © 2007 LG Electronics. Inc. All right reserved. 4-13 LGE Internal Use Only Only for training and service purposes...
Page 89 (O) Fig. C-1 Motor Assembly L/D Gear Cam (A') Chassis Hole Gear Cam Hole TOP VIEW Fig. C-2 LGE Internal Use Only 4-14 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 90 • Cassette Torque Meter (SRK-VHT-303) • Torque Gauge (600g.cm ATG) Torque Gauge Torque Gauge Adaptor Reel Table Fig. C-3-1 Fig. C-3-2 Copyright © 2007 LG Electronics. Inc. All right reserved. 4-15 LGE Internal Use Only Only for training and service purposes...
Page 91 There must exist no crumpling and folding of the tape due OSCILLOSCOPE to excess adjustment or insufficient adjustment. RF ENVELOPE OUTPUT POINT CH-1 CH-2 HEAD RF SWITCHING OUTPUT POINT LGE Internal Use Only 4-16 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 92 Fig. C-5-3 X-Value Adjustment Hole Fixed Screw Azimuth Adjustment Tilt Adjustment Screw(A) Screw(C) Height Adjustment Screw(B) A/C Head Assembly Fig. C-5-2 Copyright © 2007 LG Electronics. Inc. All right reserved. 4-17 LGE Internal Use Only Only for training and service purposes...
Page 93 SP with the width of 58mm. Fig. C-6 OSCILLOSCOPE RF ENVELOPE OUTPUT POINT CH-1 CH-2 HEAD RF SWITCHING OUTPUT POINT LGE Internal Use Only 4-18 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 94 3) If there is abnormality, perform the adjustment in post status. sections 4 and 5. 2) There must be no abnormal operation of the counter in Copyright © 2007 LG Electronics. Inc. All right reserved. 4-19 LGE Internal Use Only Only for training and service purposes...
Page 95 (4) Base Assembly P2 Post (2) Tension Post (9) Capstan Shaft (1) Supply Reel (12) Take-up Reel Fig. C-9-3 Tape Transport System LGE Internal Use Only 4-20 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 96 Smoothly turn the drum (turning cylinder) touching the soft surface Soak alcohol to the head tip surface. (Isopropyl Alcohol). Fig. C-9-4 Copyright © 2007 LG Electronics. Inc. All right reserved. 4-21 LGE Internal Use Only Only for training and service purposes...
Page 97 Lever F/R Driving Part Side Wall Guide Part Side Wall Guide Part Lever, Spring Driving Part Chassis (L) Chassis (R) Plate Slider LGE Internal Use Only 4-22 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 98 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) Copyright © 2007 LG Electronics. Inc. All right reserved. 4-23 LGE Internal Use Only Only for training and service purposes...
Page 99 Does the T/Up, Supply Reel Capstan Motor supply side Check Servo, Power Circuits. rotate? more than 4V? Check syscon circuit. Replace the Capstan Motor. LGE Internal Use Only 4-24 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 100 “L” c" “H” " “L”) normally? (In Tape without REC Tab “L” " “H” " “L” " “H”) Check Syscon Circuit. Check Syscon Circuit. Copyright © 2007 LG Electronics. Inc. All right reserved. 4-25 LGE Internal Use Only Only for training and service purposes...
Page 101 Motor normal? Is the terminal voltage of the Check Syscon, Circuit. Drum Motor more than 2.3V? Replace the Drum Motor. LGE Internal Use Only 4-26 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 102 Does the F/L Arm Assembly work normally? Replace F/L Arm Assembly . Does the Door Opener work? Replace the Door Opener. Copyright © 2007 LG Electronics. Inc. All right reserved. 4-27 LGE Internal Use Only Only for training and service purposes...
Page 103 Check the power of L/D Motor. move the F/L Arm Assembly? Replace the Front Loading Is the Cassette Holder Assembly Mechanism Assembly. assembled correctly? LGE Internal Use Only 4-28 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 108 8. GEAR LOADING ........................5-5 9. GUIDE UP/DOWN ........................5-5 10. PWB ASSEMBLY LOADING....................5-5 11. BASE MAIN ..........................5-5 EXPLODED VIEW 1. DECK MECHANISM EXPLODED VIEW...................5-7 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 109 When reassembling, perform the procedure in reverse order. The “Bottom” on Disassembly column of above Table indicates the part should be disassembled at the Bottom side. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 110 1) Turn the Plate Clamp to counterclockwise direction and then lift up the Plate Clamp. 1-1-2. Magnet Clamp 1-1-3. Clamp Upper Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 111 1) Release the Scerw(S3) 1) Release 4 Screw(S2). 2) Disconnect the FFC Connector(C1) 4. RUBBER REAR (FIG. 5-3) 3-1. Gear Feed 3-2. Gear Middle LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 112 1) Unlock the Locking Tab(L4) in direction of arrow(B) and then separate the Gear Pulley from the Base Main. 11. BASE MAIN(FIG. 5-4) Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 114 EXPLODED VIEW 1. DECK MECHANISM EXPLODED VIEW DP-10C 015B 015A 012A 012A Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

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