Zenith XBV243 series Service Manual
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Zenith XBV243 series Service Manual

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SERVICE MANUAL
Product Type:
VCR DVD Combo
Chassis:
D35E Combo
Manual Series: VR168
Manual Part #: 923-03485
Model Line:
E
Product Year:
2002
CONTENTS
General Info ................................................. 1
Service Menu ................................................ 2
Servicing ..................................................... 3
Parts List ..................................................... 4
Diagrams ...................................................... 5
Schematics ................................................... 6
Published March 2002
by Technical Publications
Zenith Electronics Corporation
201 James Record Road
Huntsville, Alabama 35824-1513
Copyright
2002 by Zenith Electronics Corporation
Model Series:
XBV243

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Summary of Contents for Zenith XBV243 series

  • Page 1 Service Menu ..........2 Servicing ............. 3 Parts List ............. 4 Diagrams ............5 Schematics ........... 6 Published March 2002 by Technical Publications Zenith Electronics Corporation 201 James Record Road Huntsville, Alabama 35824-1513  Copyright 2002 by Zenith Electronics Corporation...

  • Page 2: Servicing

    When servicing this product, under no circumstances should the original design be modified or altered without permission from Zenith Electronics Corporation. All components should be replaced only with types identical to those in the original circuit and their physical location, wiring and lead dress must conform to original layout upon completion of repairs.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS SECTION 6 DIAGRAMS SECTION 1 SUMMARY EXPLODED VIEW ........... 6-1 SPECIFICATIONS .......... 1-1 VCR EXPLODED VIEW ........6-2 KEY TO ABBREVIATIONS ........ 1-2 DVD EXPLODED VIEW ........6-3 SERVICING PRECAUTIONS ......1-3 PACKAGE CONTENTS ........1-4 MAIN BLOCK DIAGRAM ........6-4 POWER BLOCK DIAGRAM ........
  • Page 4 - TOC-2 -...

  • Page 5: Section 1 Summary

    section 1 SUMMARY SUMMARY SPECIFICATIONS DVD PART Power supply ........AC 120 V, 60 Hz Power ..........23 W Mass ............ 3.0kg(6.6lbs) External dimensions ......430 x 88 x 247 (W x H x D) Signal system ........PAL 625/50, NTSC 525/60 Laser ...........

  • Page 6: Key To Abbreviations

    SUMMARY KEY TO ABBREVIATIONS Alternating Current Maximum Automatic Color Control Modulator Adjust Microphone Audio Erase Minimum Automatic Frequency Control Mixer, Mixing Automatic Fine Tuning Monostable, Multivibrator Automatic Gain Control Mono Multi Vibrator Automatic Level Control Modulation, Modulator Amplitude Modulation MODEM Modulator-Demodulator Amplifier Antenna...

  • Page 7: Servicing Precautions

    SUMMARY SERVICING PRECAUTIONS ELECTROSTATICALLY SENSITIVE (ES) DEVICES Some semiconductor (solid state) devices can be CAUTION: Before servicing the product covered by this damaged easily by static electricity. Such components service data and its supplements and addends, read and commonly are called Electrostatically Sensitive (ES) follow the SAFETY PRECAUTIONS.

  • Page 8: Package Contents

    SUMMARY PACKAGE CONTENTS CABLE SET ASS'Y RF CABLE PHONO CORD 1WAY PHONO CORD 2WAY BATTERY REMOCON OWNER'S MANUAL PACKING SHEET ACKING PACKING BOX CARTON OPTIONAL PARTS VR168 - 923-03485 D35E COMBO - SUMMARY...

  • Page 9: Section 2 Chassis

    section 2 CHASSIS CHASSIS CABINET FRONT DISPLAY Angle icon indicator PROGRAM indicator CD REC indicator Repeat playback mode indicators ALL MP3 -R W BIL PR SAP CH Total playing time/elapsed time indicators Stereo indicator Chapter/Track number indicator DVD indicator Title number indicator Video CD indicator BACK EXPLODED DIAGRAM...

  • Page 10: Self Diagnostics

    CHASSIS NOTES SELF DIAGNOSTICS 1. Error codes will not be stored. The program must be SELF DIAGNOSTIC OVERVIEW re-initialized as described in the preceding step. Provides service personnel a convenient service aid by a 2. Pin numbers refer to IC501 microcomputer, unless visual display of error codes generated by the otherwise stated.

  • Page 11: Cabinet Disassembly

    CHASSIS CABINET DISASSEMBLY CAUTION BEFORE SERVICING Electronic parts are susceptible to static electricity and may easily be damaged. Follow proper grounding procedures. Many screws are used inside the unit. To prevent missing, dropping, etc. of the screws, always use a magnetized screw driver in servicing.

  • Page 12: Circuit Board Disassembly

    CHASSIS CIRCUIT BOARD DISASSEMBLY DIGITRON AND KEY CIRCUIT BOARD Note: Before removing the main circuit board, be sure 1. Remove the front panel. (See Fig. 2-3) to short circuit the laser diode output land. After 2. Release 3 screws (D), and remove the digitron cir- replacing the main circuit board, open the land after cuit board.

  • Page 13: Section 3 Electrical

    SECTION 3 Electrical ELECTRICAL TROUBLESHOOTING 1. Power(SMPS) CIRCUIT (2) No 12VA (TO CAP, DRUM MOTOR) (1) No 5.3VA (SYS/Hi-Fi/TUNER) NO 5.3VA. NO 12VA. Check or Replace Is the Vcc (13V) supplied to (+) Replace F101. Is F101 normal? D110. terminal in D115 and D117? Is R101 Replace Is the Vcc (12V) supplied to (-)
  • Page 14 ELECTRICAL TROUBLESHOOTING (CONTINUED) (5) No REG 5V (AVCP) (4) No 5V (TO DVD) NO 5V. No REG 5V. Is 5.3VA present on Is 5.3VA present on 5.3VA Line Check. 5.3VA Line Check. Q113 Emitter? Q117 Collector? Is the Q115 Base Is 33V present on Check the Power Check 33V Line.
  • Page 15 ELECTRICAL TROUBLESHOOTING (CONTINUED) -29VA. (9) No 8VA -29VA. NO 8VA. Is Vcc (13V) supplied to Check or Replace Check or Replace (+) terminal in D114? D108. D110. Check or Replace Is Vcc (12V) supplied D114. to IC106 Pin1? Check the Power Is Q115 Base “H”? Control.
  • Page 16 ELECTRICAL TROUBLESHOOTING (CONTINUED) 2. SYSTEM/KEY CIRCUIT (1) AUTO STOP Auto Stop Does the SW30 waveform Check the Drum Motor appear at IC501 signal. Pin24? Do T/UP Reel Pulses Do the T-UP Reel Pulses Does 5.2V appear at appear at Q514 appear at IC501 Pin4? RS501? Base terminal ?
  • Page 17 ELECTRICAL TROUBLESHOOTING (CONTINUED) 3. SERVO CIRCUIT (1) Unstable Video in PB MODE Unstable Video in PB Mode. Does the Noise level of the screen change periodically? Do the CTL pulses appear Is the adjustment height of at IC501 Pin37? the CTL Head accurate? Does the CFG waveform Readjust the height of the appear at IC501...
  • Page 18 ELECTRICAL TROUBLESHOOTING (CONTINUED) (3) When the Capstan Motor doesn’t run When the Capstan Motor doesn’t run, Refer to “SMPS (CAPSTAN/12Volt) Does 12VA appear at PMC01? Trouble Shooting”. Does 2.8V appear at PMC01? Check PMC01 and the Capstan Does the PWM signal appear at Motor Ass’y.
  • Page 19 ELECTRICAL TROUBLESHOOTING (CONTINUED) KEY doesn't work. KEY doesn’t work. Refer to “SMPS 5.3VA Is 5V applied to Trouble Shooting”. IC501 Pin 15? Does LED or FLD change Replace the defective when a function button is switches. pressed? 4. OSD CIRCUIT 1) No OSD display.

  • Page 20: Dvd Troubleshooting

    ELECTRICAL DVD TROUBLESHOOTING (CONTINUED) 5. Y/C CIRCUIT (1) No Video in EE Mode No Video in EE Mode Does the Video signal Check DVD Video Input (IC802, Pin29), Tuner Video Input appear at IC301 (TU701 Pin24), Line Video Input (JK801), respectively. Pins28, 30, 31? Is 5.2V applied to IC301 Check the REG 5V Line.
  • Page 21 ELECTRICAL DVD TROUBLESHOOTING (CONTINUED) (2) When the Y(Luminance) signal doesn’t appear on the screen in PB Mode Is 5V applied to IC301 Check the line of the REG Pins 12, 36, 61, 67, 90, 96? 5V Line. (Power Circuit) Refer to ‘SYSTEM I2C BUS Is the I2C Bus signal applied CHECK Trouble Shooting’.
  • Page 22 ELECTRICAL TROUBLESHOOTING (CONTINUED) Y/C CIRCUIT (3) When the C(Color) signal doesn’t appear on the screen in PB Mode, Is 5V applied to IC301 Check the line of the REG Pins 12, 36, 61, 67, 90, 96? 5V Line. (Power Circuit) Does Color signal appear Does X301(3.58MHZ) Replace X301.
  • Page 23 ELECTRICAL TROUBLESHOOTING (CONTINUED) (4) When the Video signal doesn’t appear on the screen in REC Mode, REC mode Check the EE mode Is EE mode normal? Is color? Is brightness ? Is color? Is the brightness signal Does signal appear at supplied to IC301 Pins 13,14? IC301 Pins 58, 60? Is 5V supplied to IC301...
  • Page 24 ELECTRICAL TROUBLESHOOTING (CONTINUED) 6. Hi-Fi CIRCUIT (A) No Sound(EE Mode) No Sound. Check the TU Audio of IC801 Check IC751 Pins 30, 31. Pins 1, 3 Check the DVD Audio of IC801 Check the DVD MODULE. Pins 4, 5. (P8D01 Pins 3, 5). Check the AV1 Audio of IC801 Check the Rear Jack.
  • Page 25 ELECTRICAL TROUBLESHOOTING (CONTINUED) 3. Y/C CIRCUIT (B) Hi-Fi Playback PB mode No Sound. Check the Vcc of IC801 Check Power. (Pins 34, 40) Check the Hi-Fi Selection switch. Check IC501 Pin23 (IC801 Pin 41) and the Tape quality. (A.H/SW) Is the RF Envelope at IC801 Pin 44 over 2Vp-p? Check the parts of µ-COM Check IC801 Pin42(Data),...
  • Page 26 ELECTRICAL TROUBLESHOOTING (CONTINUED) ( C ) Hi-Fi REC. It is impossible to record Hi-Fi Audio signal. Check Vcc of IC801.(Pins34, 40) Check Power. Check IC801 Pin42(Data), Pin43(CLOCK). Check ports of µ-CPM. 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.)
  • Page 27 ELECTRICAL TROUBLESHOOTING (CONTINUED) 7. Tuner/IF CIRCUIT (A) No Picture on the TV screen No picture on the TV screen Is the Video signal at Is +33V applied to TU701 Check 33V line. the TU701 Pin 24. Pin16? Is +5V applied to TU701 Check 5V line.
  • Page 28 ELECTRICAL TROUBLESHOOTING (CONTINUED) (B) No Sound No Sound. Check the Vcc of IC751 Pins1, Check 5.2V Line. 11, 19, 22, 33. Check the Tuner SiF signal at Check the Tuner SIF of TU701 Pin22. IC751Pin2. Replace X751 Check the oscillator of IC751 Pins 5, 6. Check the IIC Clock and Data at IC751 Check the Audio of IC751 Pins30, 31.
  • Page 29 ELECTRICAL TROUBLESHOOTING 1. µ-COM Circuit B. Video abnormal A. Audio abnormal AUDIO ABNORMAL VIDEO ABNORMAL Check Video jack. Check Audio jack. YES(If OK) YES(If OK) Check MPEG_CLK Signal Refer to Video part. of MPEG part. YES(If OK) YES(If OK) Refer to Audio part. Refer to Encoder part.
  • Page 30 ELECTRICAL DVD TROUBLESHOOTING (CONTINUED) D. Picture abnormal PICTURE ABNORMAL Check the disc. Refer to Servo part If OK Check MPEG_CLK Signal of MPEG part YES(If OK) Check DSP YES(If OK) Check MPEG YES(If OK) Replace B/D E. Disc Error DISC ERROR Check Disc YES(If OK) Refer to Servo part...
  • Page 31 ELECTRICAL TROUBLESHOOTING (CONTINUED) 2. MPEG Circuit Power is on Check power & clock. Does Logo appear Check power & clock. on the screen? Does the moving picture of the DVD Disc Is MPEG data Check CD/DVD DSP signal normal? play on the screen output signal.
  • Page 32 ELECTRICAL TROUBLESHOOTING (CONTINUED) 3. RF/Servo Circuit CHECK POINT(General) Does signal go "High" to IC201 Pin194 when power is on? Does signal pulse Check "2.µ-COM Part". input to IC201 Pins 58, 59 when power is on? Does Does Replace X301 or IC304 TTL pulse output to 33.8688MHz clock input (30MHz clock defect)
  • Page 33 ELECTRICAL TROUBLESHOOTING (CONTINUED) No disc No disc Power on Check loading Part. Push Pick-up to inner Does tray open or close? track to the end by hand. Does PMD03 Pin 13 DECK assembly is change high to low? defective. (Limit sw) Pressing the open/close key, check the voltage of IC2M1 check µ-COM Part.
  • Page 34 ELECTRICAL TROUBLESHOOTING (CONTINUED) DISC IN DISC IN OPEN/CLOSE Fig.3. FOCUS ERROR waveform Check the focus error Check IC2A1 Pin 11,12,13,14 FOCUS ON? movingthe lens up and in DVD Mode down. (IC2A1 Pin 42) IC201 no output : Pick-up is defective. Does the TTL level change Replace IC201.
  • Page 35 ELECTRICAL TROUBLESHOOTING (CONTINUED) CHECK A Check RF Eye-Pattern. Check IC2A1 Pins 5, 6, 7, 8. No signal: Pick-up is defective RF : 1.5-1.6V(IC2A1 Pin 57) Does the Is the eye-pattern vivid? sawtooth waveform emit Does the 1.6V emit? Replace IC2A1. at IC2A1 Pin 41? Replace IC201.
  • Page 36 - 3-24 -...

  • Page 37: Section 4 Mechanical

    SECTION 4 Mechanical MECHANISM - VCR VCR DECK MECHANISM PART LOCATIONS Top View Bottom View T: Top, B:Bot NOTES: • When reassembling, perform the procedure in the reverse order. • When reassembling, confirm Mechanism and Mode Switch Alignment Position (refer to Page 4-14) VR168 - 923-03485 D35E COMBO - SERVICING...
  • Page 38 MECHANISM - VCR DRUM ASSEMBLY Fig. B-1 1) Unplug the Drum FPC Connector. 2) Remove three Screws (S1) on the bottom side and separate the Drum assembly. Cap FPC 3) Unhook (H1), (H2) and separate the Holder FPC and Cap FPC. Also see figure (B1). Drum FPC DRUM MOTOR 1) Remove two Screws (S2) and disassemble the Sta-...
  • Page 39 MECHANISM - VCR PLATE TOP (FIG. A-2-1) 1)To Remove, use a screwdriver to carefully free the tabs at each end (B and B’ in the figure at right). Rotate the plate upwards to free the slotted hooks (C') from the studs (C and C’ in the figure). 2) To replace, slide the hooks into position on the (B') studs (C and C’) and snap the Plate Top down into...
  • Page 40 MECHANISM - VCR HOLDER ASSEMBLY CST (FIG. A-2-2) 1) Move the Holder assembly CST in direction of arrow Gear Rack F/L and lift the left side through slot (D) . 2) Pull the right side of the Holder assembly CST from the guided holes in the Chassis.
  • Page 41 MECHANISM - VCR ARM ASSEMBLY CLEANER (FIG. A-3-1) BASE ASSEMBLY A/C HEAD (FIG. A-3-3) 1) Carefully pry tab “A” (see Fig. A-3-1) to clear the 1) Remove Screw (S4) and lift the Base assembly A/C embossed tab on the chassis. Turn the Arm Assem- Head up.
  • Page 42 MECHANISM - VCR Arm Assembly Tension (Fig. A-4-3) (H11) Spring TB Brake Assembly T (Fig. A-4-1) Spring Tension Reel S (Fig. A-4-4) Reel T (Fig. A-4-4) Spring RS Brake Assembly RS (Fig. A-4-2) (H12) (H9) (H10) Base Tension Chassis Fig. A-4 BRAKE ASSEMBLY T (FIG.
  • Page 43 MECHANISM - VCR Opener Lid (Fig. A-5-2) Assembly Pinch (Fig. A-5-3) Base Assembly P4 Lever T/up (H13) (Fig. A-5-1) (Fig. A-5-4) (H13) Arm T/up (Fig. A-5-5) Chassis Fig. A-5 LEVER T/UP (FIG. A-5-4) BASE ASSEMBLY P4 (FIG. A-5-1) 1) Carefully pry up Tab (A) to clear the embossed tab on ARM T/UP (FIG.
  • Page 44 MECHANISM - VCR CLUTCH ASSEMBLY D35 (FIG. A-6-4) BELT & MOTOR CAPSTAN (FIG. A-6-1/2) Remove Washer (W1) and lift the Clutch assembly 1) Remove the Belt Capstan. D35. 2) Remove the three Screws (S5) from the bottom of the Chassis and lift the Motor Capstan. BRAKE ASSEMBLY CAPSTAN (FIG.
  • Page 45 MECHANISM - VCR GEAR DRIVE & CAM (FIG. A-7-1/2) PLATE SLIDER (FIG. A-7-4) 1) Remove Washer (W2) and lift the Gear Drive. Lift the Plate Slider. 2) Unhook Hook (H14) of the Gear Cam and lift the LEVER TENSION (FIG. A-7-5) Gear Cam.
  • Page 46 MECHANISM - VCR 2) Move Base assembly P3 in the direction of the arrow GEAR ASSEMBLY P2/P3 (FIG. A-8-1/2) (B) along the slot in the Chassis and disassemble it 1) Lift the Gear assembly P2. from the bottom side. Place the Mechanism face 2) Lift the Gear assembly P3.
  • Page 47 MECHANISM - VCR BASE LOADING (FIG. A-9-1) ARM ASSEMBLY IDLER (FIG. A-9-3) 1) Remove the Screw (S7). Pinch (B) and (C) as shown in Fig. A-9-3, and lift. 2) Lift the Base Loading. NOTE: When disassembling, be careful not to catch part BASE TENSION (FIG.
  • Page 48 MECHANISM - VCR TOOLS NEEDED FOR SERVICE 1. Cassette Torque meter 2. Alignment tape 3. Torque gauge SRK-VHT-303(Not SVC part) 600g.Cm ATG 4. Torque gauge adaptor 5. Post height adjusting driver 6. + Type driver 4-12 VR168 - 923-03485 D35E COMBO - SERVICING...

  • Page 49: Vcr Alignment

    MECHANISM - VCR VCR ALIGNMENT ALIGNMENT POSITION CHECK Mechanism Alignment Position Check Purpose: To determine if the Mechanism is in the correct Position when a Tape is ejected. Test Conditions (Mechanism Test Equipment/ Fixture Check Point Condition) Blank tape 1) Turn the Power S/W on and eject the Cassette by press- 4) Remove the Screw which holds the Deck Mechanism and ing the Eject Button.
  • Page 50 MECHANISM - VCR PREPARATION FOR ADJUSTMENT (To set the Deck Mechanism to the Loading state with- Cover the Holes of the End Sensors at both sides of out inserting a Cassette Tape). the Bracket Side (L) and Bracket Assembly Door to prevent a light leak.
  • Page 51 MECHANISM - VCR GUIDE ROLLER HEIGHT ADJUSTMENT Purpose: To regulate the Height of the Tape so that the Bottom of the Tape runs along the Tape Guide Line on the Lower Drum. PRELIMINARY ADJUSTMENT Test Equipment/ Fixture Adjustment Point Post Height Adjusting Driver Play or Review Mode Guide Roller Height Adjustment screws on the Supply and Take-Up...
  • Page 52 MECHANISM - VCR AUDIO/CONTROL (A/C) HEAD ADJUSTMENT Purpose: To insure that the Tape passes accurately over the Audio and Control Tracks in exact Alignment in both the Record and Playback Modes. PRELIMINARY ADJUSTMENT (Height and Tilt Adjustment) Perform the Preliminary Adjustment when there is no Audio Output Signal with the Alignment Tape.
  • Page 53 MECHANISM - VCR 3) If Folding or Curling is observed at the Top of it, CONFIRM OPERATION slowly turn the Tilt Adjustment Screw (C) counter- Confirm that the Tape passes smoothly between the clockwise. Take-up Guide and Pinch Roller (using a Mirror or the NOTE: Check the RF Envelope after adjusting the A/C naked eye).
  • Page 54 MECHANISM - VCR ADJUSTMENT AFTER REPLACING DRUM ASSEMBLY (VIDEO HEADS) Purpose: To Test Conditions Test Equipment/ Fixture Connection Point Adjustment Points (Mechanism Condition) CH-1: PB RF Envelope Guide Roller Precise Oscilloscope Play the blank tape CH-2: NTSC: SW 30Hz Adjustment Alignment tapes Play an alignment tape PAL: SW 25Hz...

  • Page 55: Maintenance/Inspection Procedure

    MECHANISM - VCR MAINTENANCE/INSPECTION PROCEDURE CHECK BEFORE STARTING REPAIRS The following faults can be remedied by cleaning and oiling. Check the needed lubrication and the conditions of cleanliness in the unit. Check with the customer to find out how often the unit is used, and then determine that the unit is ready for inspection and maintenance.
  • Page 56 MECHANISM - VCR REQUIRED MAINTENANCE SUPPLIES REQUIRED FOR INSPECTION AND MAINTENCE The recording density of a VCR(VCP) is much higher than (1) Grease: Kanto G-311G (Blue) or equivalent that of an audio tape recorder. VCR(VCP) components (2) Isopropyl Alcohol or equivalent must be very precise, at tolerances of 1/1000mm, to (3) Cleaning Patches ensure compatiblity with other VCRs.
  • Page 57 MECHANISM - VCR GREASING 1) Greasing guidelines. Apply grease, with a cleaning patch. Do not use excessive grease as it may come into contact with the tape transport or drive sys- tem. Wipe any excess and clean with a cleaning patch wetted in Isopropyl Alcohol.
  • Page 58 MECHANISM - VCR GEAR , F/R GEAR AY, P2 & P3 4-22 VR168 - 923-03485 D35E COMBO - SERVICING...

  • Page 59: Vcr Mechanism Troubleshooting

    MECHANISM - VCR VCR MECHANISM TROUBLESHOOTING 1.Deck Mechanism Auto REW doesn't work. Is the output of END sensor of supply side "H": more than 3.5V? Or, less than 0.7V~1V? Is the Vcc voltage of Check the syscon power. END sensor 5V? Replace END sensor Is the voltage across IR LED Replace LED...
  • Page 60 MECHANISM - VCR AUTO STOP. (PLAY/CUE/REV) In Play/Cue/Rev is the pinch roller in contact with the Replace Drum Motor. capstan shaft. Are there T/up and Check Servo, Syscon. supply reel pulses. Check the Syscon, µ-COM. Replace Reel Sensor. No cassette loading. Insert the cassette.
  • Page 61 MECHANISM - VCR In PB mode Tape Presence not sensed. Is the Pinch Roller attached Check Alignment positions to the Capstan Motor Shaft? (page 4-14) Does the T/Up Is the Belt ok? Replace the Belt. Reel turn? Check the clutch and Does the Capstan Motor turn? the Idler Assembly.

  • Page 62: Front Loading Mechanism

    MECHANISM - VCR 2. Front Loading Mechanism Cassette cannot be inserted. Does the Lever Assembly Is the Lever Assembly Switch Replace or add the Lever Switch work? Spring damaged or omitted? Assembly Switch Spring. Does the CST IN Switch work Replace CST IN Switch.
  • Page 63 MECHANISM - VCR Cassette will not load. Does the CST insert? Does the opener Lid work? Replace the Opener Lid. Does the Gear Rack F/L work? Replace the Rear Rack F/L. Does the Opener Door work? Does the Arm Assembly F/L work? Is the opener Door assembled correctly? Does the L/D Motor work? Replace the Arm Assembly F/L.

  • Page 64: Dvd Deck Mechanism

    MECHANISM - DVD DVD DECK MECHANISM TOP VIEW (WITHOUT TRAY) 2 Screws, 2 Locking Tabs 4 Screws, 1 Connector 1 Locking Tabs BOTTOM VIEW 1 Screw 1 Screw 1 Locking Tab 1 Locking Tab 1 Locking Tab 1 Hook 2Screw 2 Locking Tabs TOP VIEW (WITH TRAY) Note: The “Bottom”...

  • Page 65: Mechanism Disassembly

    MECHANISM - DVD TRAY DISC (FIG. 4-2) MECHANISM DISASSEMBLY 1) Insert and push a Driver in the emergency eject hole HOLDER CLAMP (FIG. 4-1) (A) at the right side, or put the Driver on the Lever 1) Release 1 Screws (S1). (B) of the Gear Emergency and pull the Lever (B) in 2) Unhook 2 Locking Tabs (L1).
  • Page 66 MECHANISM - DVD BASE ASSEMBLY SLED (FIG. 4-3) 1) Release 4 Screws (S2). 2) Disconnect the FFC Connector (C1) GEAR ASSEMBLY FEED Unhook the Locking Tab (L2) in the direction of the arrow. GEAR MIDDLE GEAR ASSEMBLY RACK Release the Scerw (S3) RUBBER REAR (FIG.
  • Page 67 MECHANISM - DVD FRAME ASSEMBLY UP/DOWN Base Main. Note: Put the Base Main face down (Bottom Side) GEAR LOADING (FIG. 4-4) 1) Release the Screw (S4) GUIDE UP/DOWN (FIG. 4-4) 2) Unlock the Locking Tab (L3) in the direction of the 1) Move the Guide Up/Down in direction of arrow (A) as arrow and then lift up the Frame Assembly Up/Down to in Fig.(A)

  • Page 68: Deck Mechanism Adjustment

    MECHANISM - DVD Fig.11. Adjusting Screen Display DECK MECHANISM ADJUSTMENT 1) Insert Disc (Only Open/Close Key Pressing) 2) Wait Until the Sector Display is about 200,000 (Fig.11) 3) Adjust R-Skew adjusting Point until the Error rate has minimum rate with L-wrench (3mm). 4) Adjust T-Skew Adjusting Point until the Error rate has minimum rate.

  • Page 69: Component Parts

    1-888-6-ZENITH C245 0CH1104K942 Cap, Fixed Ceramic, 0.1Uf 50V 80%,-20% C250 0CH1104K942 Cap, Fixed Ceramic, 0.1Uf 50V 80%,-20% By Mail: ZENITH NATIONAL PARTS C255 0CH1104K942 Cap, Fixed Ceramic, 0.1Uf 50V 80%,-20% C256 0CH1104K942 Cap, Fixed Ceramic, 0.1Uf 50V 80%,-20% SALES AND DISTRIBUTION CENTER...
  • Page 70 COMPONENT PARTS LIST XBV243 NOTE: This list will enable you to easily determine the parts used on each Model, Chassis, or Assembly. PART# DESCRIPTION PART# DESCRIPTION C2C6 0CH1472K562 Cap, Fixed Ceramic, 4700Pf 50V 10% C329 0CH1104K942 Cap, Fixed Ceramic, 0.1Uf 50V 80%,-20% C2C7 0CH1472K562 Cap, Fixed Ceramic, 4700Pf 50V 10%...
  • Page 71 COMPONENT PARTS LIST XBV243 NOTE: This list will enable you to easily determine the parts used on each Model, Chassis, or Assembly. PART# DESCRIPTION PART# DESCRIPTION C504 0CH1104K942 Cap, Fixed Ceramic, 0.1Uf 50V 80%,-20% IC201 0IHY258010C IC, Hyundai Gdc25D801D 208 Qfp Bk Dsp+Servo C505 0CH1104K942 Cap, Fixed Ceramic, 0.1Uf 50V 80%,-20%...
  • Page 72 COMPONENT PARTS LIST XBV243 NOTE: This list will enable you to easily determine the parts used on each Model, Chassis, or Assembly. PART# DESCRIPTION PART# DESCRIPTION Q2M1 0TR124009AP Transistor, Bipolars, Dtc124Ek Tp Rohm Korea 3K/R R2A5 0RH0000C622 Resistor, Metal (Chip) 0 Ohm 1/16W 5% Q303 0TR100009BM Transistor, Bipolars, Umz1N Tl Um6 3K Tp Rohm...
  • Page 73 COMPONENT PARTS LIST XBV243 NOTE: This list will enable you to easily determine the parts used on each Model, Chassis, or Assembly. PART# DESCRIPTION PART# DESCRIPTION R301 0RH1002C622 Resistor, Metal (Chip) 10K Ohm 1/16W 5% R404 0RH0000C622 Resistor, Metal (Chip) 0 Ohm 1/16W 5% R302 0RH1001C622 Resistor, Metal (Chip) 1K Ohm 1/16W 5%...
  • Page 74 COMPONENT PARTS LIST XBV243 NOTE: This list will enable you to easily determine the parts used on each Model, Chassis, or Assembly. PART# DESCRIPTION PART# DESCRIPTION R599 0RH0000C622 Resistor, Metal (Chip) 0 Ohm 1/16W 5% IC601 0IPRPNE001A IC, Peripherals Upd16315Gb-3Bs Nec 4 R604 0RH0682C622 Resistor, Metal (Chip) 68 Ohm 1/16W 5%...
  • Page 75 COMPONENT PARTS LIST XBV243 NOTE: This list will enable you to easily determine the parts used on each Model, Chassis, or Assembly. PART# DESCRIPTION PART# DESCRIPTION 4680R-B005A Motor (Mech) Drum I2Oal05 Sejin-S C127 0CE108BF638 Cap, Fixed Electro, 1000Uf 16V 20% 4970R-0128A Spring Coil D35 (Tb) C128...
  • Page 76 COMPONENT PARTS LIST XBV243 NOTE: This list will enable you to easily determine the parts used on each Model, Chassis, or Assembly. PART# DESCRIPTION PART# DESCRIPTION C346 0CC0500K015 Cap, Fixed Ceramic, 5Pf 50V C551 0CN223AK948 Cap, Fixed Tubular, (High Di) 0.022Uf 50V 80%,-20% C347 0CE4754K638 Cap, Fixed Electro, 4.7Uf 50V 20%...
  • Page 77 COMPONENT PARTS LIST XBV243 NOTE: This list will enable you to easily determine the parts used on each Model, Chassis, or Assembly. PART# DESCRIPTION PART# DESCRIPTION C814 0CE4764F638 Cap, Fixed Electro, 47Uf 16V 20% FL301 633-032N Coil, Ift Biac Osc Deo-010 Kse C815 0CE1064F638 Cap, Fixed Electro, 10Uf 16V 20%...
  • Page 78 COMPONENT PARTS LIST XBV243 NOTE: This list will enable you to easily determine the parts used on each Model, Chassis, or Assembly. PART# DESCRIPTION PART# DESCRIPTION Q515 0TR103009AE Transistor, Bipolars, Krc103M Tp Kec (Krc1203) R322 0RD6801F608 Resistor, Carbon Film, 6.8K Ohm 1/6W 5% Q516 0TR103009AE Transistor, Bipolars, Krc103M Tp Kec (Krc1203)
  • Page 79 COMPONENT PARTS LIST XBV243 NOTE: This list will enable you to easily determine the parts used on each Model, Chassis, or Assembly. PART# DESCRIPTION PART# DESCRIPTION R543 0RD1000F608 Resistor, Carbon Film, 100 Ohm 1/6W 5% R716 0RD1001F608 Resistor, Carbon Film, 1K Ohm 1/6W 5% R544 0RD4701F608 Resistor, Carbon Film, 4.7K Ohm 1/6W 5%...

  • Page 81: Section 6 Diagrams

    SECTION 6 Diagrams XBV243 Exploded View VR168 - 923-03485 D35E COMBO - DIAGRAMS...

  • Page 82: Vcr Exploded View

    XBV243 VCR Exploded View 002A 054A VR168 - 923-03485 D35E COMBO - DIAGRAMS...

  • Page 83: Dvd Exploded View

    XBV243 DVD Exploded View VR168 - 923-03485 D35E COMBO - DIAGRAMS...

  • Page 84: Main Block Diagram

    XBV243 Main Block Diagram DISC DVD_LDQM,DVD_SD,CSI IC302 MIRR,TZC DVD_MA[0:11] IC205 GM72V1621 DRAM 1M x 16bit IC2A1 GM7IC4260CJ SDRAM DVD_MD[0:15] 256K x 16bit 33P3721 FE,TE,RFRP,SBADD,DVD/CD RF CD,DVD:A,B,C,D,E,F RF Signal PICK SPINDLE Processor TEBAL,FEBAL, MO TOR DPOCTL,EQF,EQB IC303 GM72V1621 Focus, tracking sled 1M x 16bit DVD_SD_CSO, LOADING...

  • Page 85: Power Block Diagram

    XBV243 Power Block Diagram R101 TO SYS SNUBBER RECTIFIER & BD101 BLOCK FD(+) S/W BLOCK F102 SMOOTHING (Q110, Q111, (D101, R104, FROM -COM (D107, C121, ZD101) R151, R152) C105, C106) STAND BY 'H' C103 TO SYS FD(-) TO SYS RECTIFIER & -29VA SMOOTHING TO DRUM MOT...

  • Page 86: Tuner-If Block Diagram

    XBV243 Tuner-IF Block Diagram CH/SW VCR/TV IC751 MSP3407 VR168 - 923-03485 D35E COMBO - DIAGRAMS...

  • Page 87: Y/C Block Diagram

    XBV243 Y/C Block Diagram (PB Mode) S y s t e m V . H / S W 3 0 ( F R O M u - C O M ) C-CCD X-tal Serial Cont V . E N V VCO/OSC interface ( T O u - C O M )

  • Page 88: Audio Block Diagram

    XBV243 Audio Block Diagram (EE Mode) (REC Mode) TUNER IC750 IC801 IC301 TU701 MSP3407 TDA9605H HA118717F NORMAL AUDIO OUT R AUDIO COMP OUT L LINE AUDIO(R) IN REAR Jack LINE AUDIO(L) IN A. OUT (L) A. OUT (R) (PB Mode) VR168 - 923-03485 D35E COMBO - DIAGRAMS...

  • Page 89: Hifi Block Diagram

    XBV243 Hifi Block Diagram VIDEO INPUT BLOCK Hi-Fi/ AUDIO INPUT 36 35 BLOCK Tu A.IN 'L' 28 29 Tu A.IN 'R' A.OUT 'L' A.OUT DVD A.IN 'L' IC802 To JACK IC801 A.OUT 'R' DVD A.IN 'R' AV1 A.IN 'L' AV1 A.IN 'R' 20 24 AV2 A.IN 'L' AV2 A.IN 'R'...

  • Page 90: System Block Diagram

    XBV243 System Block Diagram I - LIMIT TO/ FROM DECK TO/ FROM AVCP 5.3VA MODE S/W MS501 32 38 MODE S1 C. SYNC MODE S2 MODE S3 OSD 'H' REC 'H' MODE S4 L/D MOTOR R525 A. MUTE 'H' LD (+) IIC CLK PMC01 R526...

  • Page 91: Section 7 Schematics

    Power Supply Circuit SECTION 7 schematics No power. BD101, R101 are defective. Digitron Error. D107, D108, ZD101 are defective. 12VA no power. D110 is defective. 2.5V, 3.3V no power. D111 is defective. Switching Error. IC101 is defective. 33V no power. D113 is defective.

  • Page 92: Tuner/If Circuit

    Tuner/IF Circuit Tuner doesnÕt operate. µ-COM is defective. CH memory doesnÕt operate. 33V Power is defective. IC751 doesnÕt operate. X751 is defective. 3/4 CH switching is impossible. µ-COM is defective. VIDEO OUT AUDIO OUT CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE SYMBOL ALL SYMBOLS WITH “M”...

  • Page 93: Av Circuit

    AV Circuit Video output Noise in REC/PB. No Color in REC/PB. No Color in playout. Video output Level is unstable. No Color in PB. Video H/SW level is defective. R333, C350, C349 are defective. L306, C346 are defective. C339 is defective. R338, C338 are defective.

  • Page 94: Hifi Circuit

    Hifi Circuit IC801 Pins42, 43 aredefective. All Audio is not appear. 44 Pin is defective. Hi-Fi Audio is not appear. CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE SYMBOL ALL SYMBOLS WITH “M” ON END OF DESIGNATOR D35E COMBO - SHEET 4 VR168 - 923-03485 AND/OR SHADING.

  • Page 95: System Circuit

    System Circuit MS501 is defective. Deck is abnormal. SW is defective. Alarm operate. Key service dead. TUNER Tuning error. Capstan Motor will not operate. X501 is defective. µ-CON will not operate. IC601 Digitron is defective. LED & FLD DISPLAY will not operate. DRUM PG/FG dead.

  • Page 96: Dvd Circuit

    DVD Circuit IC203 is defective. AD Converter Error - No tracking/Focus control IC204 is defective. Scratched CD Audio abnormal. TRACKING LOOP SLED LOOP WAVEFORM FOCUS LOOP SPINDLE LOOP CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE SYMBOL ALL SYMBOLS WITH “M” ON END OF DESIGNATOR D35E COMBO - SHEET 6 VR168 - 923-03485 AND/OR SHADING.

  • Page 97: Drive Rf Circuit

    Drive RF Circuit Q2A1, Q2A2 are defective. CD/DVD LD will not be on. IC2A2 is defective. No fucus & tracking control. TRACKING LOOP SLED LOOP WAVEFORM FOCUS LOOP SPINDLE LOOP CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE SYMBOL ALL SYMBOLS WITH “M” ON END OF DESIGNATOR VR168 - 923-03485 D35E COMBO - SHEET 7 AND/OR SHADING.

  • Page 98: Mpeg Circuit

    MPEG Circuit ¥ NO 2CH AUDIO OUT ¥ NO 2CH AUDIO OUT ¥ NO VCD SCREEN DISPLAY. ¥ NO CD SOUND OUT. ¥ NO DVD SCREEN DISPLAY IC302, IC303 are defective. A/V out bad. W AVEFORM CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE SYMBOL ALL SYMBOLS WITH “M”...

  • Page 99: Audio Circuit

    Audio Circuit 2CH L SIGNAL 2CH R SIGNAL CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE SYMBOL ALL SYMBOLS WITH “M” ON END OF DESIGNATOR VR168 - 923-03485 D35E COMBO - SHEET 9 AND/OR SHADING. REPLACE ONLY WITH PART NUMBERS SPECIFIED. INDICATE SURFACE MOUNTED COMPONENT...

  • Page 100: Micro Circuit

    Micro Circuit Servo will not operate FLASH ROM DRAM FLD Error MAIN CPU Video output level is unstable CPLD Open, Close Error EEPROM Servo will not operate X501 No Power on CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE SYMBOL ALL SYMBOLS WITH “M” ON END OF DESIGNATOR D35E COMBO - SHEET 10 VR168 - 923-03485 7-10...

  • Page 101: Jackpack Circuit

    Jackpack Circuit S VIDEO (C) COM P.VIDEO AUDIO (L) S VIDEO (Y) CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE SYMBOL ALL SYMBOLS WITH “M” ON END OF DESIGNATOR VR168 - 923-03485 7-11 D35E COMBO - SHEET 11 AND/OR SHADING. REPLACE ONLY WITH PART NUMBERS SPECIFIED. INDICATE SURFACE MOUNTED COMPONENT...

  • Page 102: Vcr Pcb Layout

    VCR PCB Layout LOCATION GUIDE CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE SYMBOL ALL SYMBOLS WITH “M” ON END OF DESIGNATOR D35E COMBO - SHEET 12 VR168 - 923-03485 7-12 AND/OR SHADING. REPLACE ONLY WITH PART NUMBERS SPECIFIED. INDICATE SURFACE MOUNTED COMPONENT...

  • Page 103: Dvd Pcb Layout Top

    DVD PCB Layout Top LOCATION GUIDE CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE SYMBOL ALL SYMBOLS WITH “M” ON END OF DESIGNATOR VR168 - 923-03485 7-13 D35E COMBO - SHEET 13 AND/OR SHADING. REPLACE ONLY WITH PART NUMBERS SPECIFIED. INDICATE SURFACE MOUNTED COMPONENT...

  • Page 104: Dvd Pcb Layout Bottom

    DVD PCB Layout Bottom LOCATION GUIDE CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE SYMBOL ALL SYMBOLS WITH “M” ON END OF DESIGNATOR D35E COMBO - SHEET 14 VR168 - 923-03485 7-14 AND/OR SHADING. REPLACE ONLY WITH PART NUMBERS SPECIFIED. INDICATE SURFACE MOUNTED COMPONENT...

  • Page 105: Other Pcb Layouts

    Other PCB Layouts 2. KEY P.C.BOARD 3. CLOCK P.C.BOARD CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE SYMBOL ALL SYMBOLS WITH “M” ON END OF DESIGNATOR VR168 - 923-03485 7-15 D35E COMBO - SHEET 15 AND/OR SHADING. REPLACE ONLY WITH PART NUMBERS SPECIFIED. INDICATE SURFACE MOUNTED COMPONENT...

  • Page 106: Waveforms 1/2

    Waveforms 1/2 * IC301 Oscilloscope Waveform * IC501 Oscilloscope Waveform IC301 Pin IC301 Pin IC301 Pins 18, 21, IC301 Pin IC501 Pin IC501 Pin IC501 Pin IC501 Pin IC501 Pin 100mV/10msec DIV 100mV/10msec DIV 100mV/10msec DIV 200mV/10msec DIV REC/PB QUE/REV QUE/REV VV/EE VV/EE...
  • Page 107 Waveforms 2/2 IC2A1 Pin 42, Focus Error IC2A1 Pin 41 IC2A1 Pin 41 IC301 Pin 133, Composite IC301 Pin 151, Chrominance IC301 Pin 145, Luminance IC2A1 Pin 36, Pi Tracking Error VBR TRACKING Error (Super video out Mode) (Super video out Mode) IC2A1 Pin 57, IC301 Pin 159, IC301 Pin 145...

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