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General| Brand | Zenith |
|---|---|
| Model | TVBR1342Z |
| Category | TV VCR Combo |
| Language | English |
Provides essential safety information for audio-video product servicing technicians.
Details essential service procedures and checks for safe and effective repairs.
Lists critical precautions to prevent fire and electric shock hazards during servicing.
Explains potential X-radiation sources and necessary precautions for safe operation.
Advises on handling picture tubes to prevent implosion hazards during installation.
Offers guidance on safe and effective installation practices for audio-video products.
Describes the X-ray protection circuit and its function in the television.
Outlines the procedure for measuring CRT anode high voltage for safety.
Lists necessary equipment for CRT anode high voltage measurement and testing.
Details the steps to verify the proper operation of the X-ray shutdown circuit.
Lists the available picture sizes for the product models.
Specifies TV system and frequency ranges for VHF, UHF, and CATV.
Provides intermediate frequency values for picture and sound signals.
Specifies the intermediate frequency for the audio signal.
Lists the maximum audio output power for different models.
Details the speaker impedance and configuration for the models.
Specifies the required power source for operating the unit.
Lists the power consumption in watts for each model.
Specifies operational and storage temperature ranges for the VCR section.
Details the video recording system, including heads and recording methods.
Lists VCR head types, tape width, audio tracks, and tape speeds.
Provides fast forward, rewind times, and tape speeds (SP, LP, SLP).
Specifies input signal levels for video and audio, and output signal levels.
Lists the weight and physical dimensions (W x D x H) for each model.
Instructions for removing mechanical parts and printed circuit boards.
Steps for removing the back cabinet of the TV/VCR.
Procedure for removing the CRT Printed Circuit Board, with safety caution.
Steps for removing the VCR block assembly from the unit.
Instructions for removing deck shield plate, chassis, and bottom shield.
Steps for removing the System Control (SYSCON) PCB.
Steps for removing the back cabinet for the TVBR2542Z model.
Procedure for removing the CRT PCB for TVBR2542Z, with safety caution.
Steps for removing the TV/VCR block assembly for TVBR2542Z.
Instructions for removing the Main PCB for the TVBR2542Z model.
Steps for removing the deck shield plate for TVBR2542Z.
Instructions for removing the jack plate and SYSCON PCB for TVBR2542Z.
Steps for removing the deck chassis for TVBR2542Z.
Instructions for removing the top bracket of the VCR deck.
Steps for removing the flap lever and right tape guide.
Procedure for removing the left tape guide from the VCR deck.
Instructions for removing the cassette holder assembly.
Steps for removing the left and right cassette sides.
Instructions for removing the link assembly from the VCR deck.
Steps for removing the loading motor assembly.
Procedure for removing the sensor cover L3.
Instructions for removing the tension assembly.
Steps for removing the T brake assembly.
Instructions for removing the S reel and T reel.
Steps for removing the pinch roller block and P5-3 arm assembly.
Procedure for removing the A/C head.
Instructions for removing the FE head, specific to recorders.
Steps for removing the AHC assembly and cylinder unit assembly.
Procedure for removing the capstan DD unit.
Instructions for removing the middle gear and main cam.
Steps for removing the clutch assembly.
Instructions for removing the loading gear S/T assembly.
Steps for removing the inclined S/T assembly.
Detailed procedure for safely removing the anode cap from the CRT.
Instructions for removing the deflection yoke assembly.
List of common abbreviations used in the manual, from A to Y.
List of common abbreviations used in the manual, from S to Y.
Details how to enter service modes and their corresponding operations.
Procedure to check total power on and play/record hours used by the unit.
Instructions for cleaning various parts of the tape transport system.
Procedure for cleaning the audio control head and full erase head.
Guidance on cleaning the tape transport system components.
Instructions for cleaning the cylinder head.
Data settings table for replacing the memory IC in the TVBR1342Z model.
Data settings table for replacing the memory IC in the TVBR1942Z model.
Data settings table for replacing the memory IC in the TVBR2542Z model.
Instructions on how to use the servicing fixture for preparation.
Detailed steps for using the servicing fixture with the TVBR2542 model.
General notes and procedures before performing mechanical adjustments.
Steps to confirm and adjust reel disk height for proper tape operation.
Procedure to confirm and adjust tension post position for tape tension.
Confirms playback and back tension torque using specific tapes and tools.
Confirms VSR torque using a torque gauge and adapter.
Confirms reel brake torque for both S and T reels.
Procedures for confirming and adjusting the tape running mechanism.
Steps to adjust the guide roller for proper tape path.
Confirms and adjusts the audio/control head alignment and level.
Adjusts tape running parameters, specifically the X value.
Confirms Hi-Fi audio output quality.
Identifies the location of parts used for mechanism adjustments.
General precautions and notes before performing electrical adjustments.
Steps to adjust the On-Screen Display (OSD) settings.
Basic electrical adjustments for the VCR section of the unit.
Procedure for adjusting the PG (Pulse Generator) shifter.
Steps for adjusting the VCO (Voltage Controlled Oscillator) freerunning frequency.
Adjusts the Radio Frequency Automatic Gain Control setting.
Adjusts constant voltage levels in the TV section.
Adjusts the cut-off point for color signals.
Adjusts white balance for accurate color reproduction.
Adjusts the focus for a clear picture.
Adjusts the horizontal phase for proper picture alignment.
Adjusts the vertical position of the picture.
Adjusts the vertical size of the picture to fill the screen.
Adjusts the sub-brightness setting for the display.
Adjusts the sub-contrast for the TVBR2542Z model.
Adjusts the sub-tint setting for 13/1942Z models.
Adjusts sub-tint and sub-color for TVBR2542Z models.
Adjusts the sub-color setting for 13/1942Z models.
Adjusts the horizontal position of the On-Screen Display.
Locates components relevant to electrical adjustments for TVBR 13/1942Z.
Locates VCR section components for electrical adjustments on TVBR 2542Z.
Locates TV section components for electrical adjustments on TVBR 2542Z.
Performs rough static convergence adjustments.
Adjusts the CRT purity settings.
Fine-tunes static convergence settings.
Adjusts dynamic convergence for screen uniformity.
Reference key mapping models to their respective identifiers.
Provides the address for ordering parts.
Instruction to refer to page 1 for part reference.
Instruction to refer to page 1 for part reference.
Instruction to refer to page 1 for part reference.
Instruction to refer to page 1 for part reference.
Instruction to refer to page 1 for part reference.
Instruction to refer to page 1 for part reference.
Instruction to refer to page 1 for part reference.
Instruction to refer to page 1 for part reference.
Instruction to refer to page 1 for part reference.
Instruction to refer to page 1 for part reference.
Instruction to refer to page 1 for part reference.
Instruction to refer to page 1 for part reference.
Instruction to refer to page 1 for part reference.
Instruction to refer to page 1 for part reference.
Exploded view of the mechanical parts for TVBR 13/1942Z.
Exploded view of the mechanical parts for TVBR2542Z.
Exploded view of the mechanical parts for TVBR 13/1942Z.
Exploded view of the mechanical parts for TVBR2542Z.
Exploded view of the upper deck mechanical parts.
Exploded view of the lower deck mechanical parts.
Shows how different assemblies interconnect for 13/19 inch models.
Block diagram illustrating the main microprocessor circuit for 13/19 inch models.
Block diagram showing the audio circuitry for 13/19 inch models.
Block diagram illustrating the video processing circuit for 13/19 inch models.
Shows interconnections between assemblies for the 25 inch model.
Block diagram of the main IC in the 25 inch model.
Block diagram of the audio IC in the 25 inch model.
Block diagram of the video IC in the 25 inch model.
Schematic of the primary power supply circuit for 13/19 inch models.
Schematic of the deflection circuit for 13/19 inch models.
Schematic of the main microprocessor circuit for 13/19 inch models.
Schematic of the chroma (color) processing circuit for 13/19 inch models.
Schematic of the head amplifier circuit for 13/19 inch models.
Schematic of the audio amplifier circuit for 13/19 inch models.
Schematic of the Cathode Ray Tube (CRT) circuit for 13/19 inch models.
Schematic of the VCR deck mechanism circuit for 13/19 inch models.
Schematic of the input/output circuitry for 13/19 inch models.
Schematic of the control panel circuit for 13/19 inch models.
Schematic of the primary power supply circuit for the 25 inch model.
Schematic of the deflection circuit for the 25 inch model.
Schematic of the main microprocessor circuit for the 25 inch model.
Schematic of the chroma (color) processing circuit for the 25 inch model.
Schematic of the head amplifier circuit for the 25 inch model.
Schematic of the audio amplifier circuit for the 25 inch model.
Schematic of the CRT circuit for the 25 inch model.
Schematic of the VCR deck mechanism circuit for the 25 inch model.
Schematic of the input/output circuitry for the 25 inch model.
Schematic of the control panel circuit for the 25 inch model.
Top view layout of the main printed circuit board for 13/19 inch models.
Bottom view layout of the main printed circuit board for 13/19 inch models.
Layout diagrams for the control panel and deck PCBs for 13/19 inch models.
Top view layout of the main printed circuit board for the 25 inch model.
Top view layout of the system control PCB for the 25 inch model.
Bottom view layout of the system control PCB for the 25 inch model.
