The B & K Model 1245 Solid State Color Generator manual provides detailed instructions for setting up, operating, and troubleshooting the device, which is used for adjusting color TV sets by generating various patterns such as dot, crosshatch, horizontal, and vertical lines. It also explains how to connect the generator to a TV, adjust the color amplitude and pattern settings, and use the Gun Killer switches to control the color guns of the picture tube.
Manual Overview
The B & K Model 1245 Solid State Color Generator is designed for the convergence and adjustment of color TV sets. It provides various patterns such as dot, crosshatch, horizontal, and vertical lines to assist in adjusting horizontal and vertical linearity, size, and convergence. The generator operates on the “offset-subcarrier” principle, producing ten color-bar signals spaced at 30° phase intervals. For troubleshooting, the manual outlines the use of two main controls: the Color/Vert Line Amp for power and color amplitude adjustments, and the Pattern Selector Switch for choosing display patterns. Calibration involves tuning the RF output to Channel 3, 4, or 5 by adjusting the RF coil. The Gun Killer switches allow control over the color guns of the picture tube. For diagnostics, the manual suggests adjusting the TV’s hue control to ensure accurate color representation, with cyan as the reference color for proper alignment. The generator’s output is connected directly to the TV’s antenna terminals for operation.
Quick Issues Covered
- Diagnose power-up failures with color amplitude control adjustments.
- Identify error codes related to color bar phase alignment.
- Use schematics for circuit tracing and RF coil adjustments.
Overview
The B & K Model 1245 Solid State Color Generator is a portable device designed for the quick and easy convergence and adjustment of color TV sets. It features a crystal-controlled, keyed rainbow color display for testing color circuits, hue control, and aligning color demodulators. The generator provides various patterns, including dot, crosshatch, horizontal, and vertical lines, for adjusting TV linearity and size. It operates with an RF output on Channel 3, 4, or 5, using the “offset-subcarrier” principle to generate color bars. The manual covers the complete use of the instrument, emphasizing its reliability and ease of operation.
Specifications
- WEIGHT: 3 Ibs.
- HEIGHT: 27%”
- WIDTH: 8%”
- DEPTH: 8%”
Controls & Indicators
The B & K Model 1245 Color Generator has two front panel controls:
1. Color/vert Line Amp: This control serves as the A.C. power off/on switch and the Color Amplitude control. It sets the level of the color subcarrier and checks the color sync lock ability of the TV receiver. The amplitude is variable from 0 to 200%, with the midpoint providing normal or 100% output. It also includes the vertical lines brightness control to establish the proper ratio between vertical and horizontal line brightness.
2. Pattern Selector Switch: This switch allows the selection of different patterns, including DOTS, CROSSHATCH, HORIZONTAL LINES, VERTICAL LINES, and COLOR pattern. Each pattern serves specific functions for adjusting convergence, linearity, and color alignment on TV receivers.
Additionally, the front panel includes Gun Killer switches that control the color guns of the picture tube. By connecting colored clip leads to the picture tube control grids and operating the switches, the tube color guns can be activated or deactivated.
Installation / Setup
Refer to the PDF for details.
Operation
Operation of the B & K Model 1245 Color Generator involves the following steps:
1. Disconnect the antenna line from the TV receiver and attach the generator output alligator clips to the antenna terminals.
2. Turn on the TV receiver and tune it to Channel 3, unless the generator has been reset to another channel.
3. Turn on the 1245 power switch.
4. Set the pattern switch to the color bar position and adjust the color amplitude control to the mid-range.
5. Fine-tune the TV receiver to achieve the sharpest color bar pattern.
6. Increase the TV receiver’s color saturation control until color appears on the bars.
7. If the receiver is functioning correctly and is properly adjusted, ten bars will be visible on the screen.
8. To deactivate the CRT guns, identify the control grid leads from the CRT socket, usually colored red, green, and blue. Connect the black alligator clip to the TV chassis. You can attach the alligator clips directly onto the control grid leads, ensuring contact with the copper wire.
9. Use the Gun Killer Switch to deactivate any gun by selecting the switch matching the gun’s color and moving it to the ON position. To reactivate, move the switch to the OFF position.
Troubleshooting & Error Codes
Refer to the PDF for details.
Safety & Warnings
Refer to the PDF for details.
Download MANUAL Manual (PDF – 667.0 KB)
Bk-precision-1245-instruction MANUAL PDF: Guide for technicians to troubleshoot and calibrate the Bk-precision 1245 model. File size: 667.0 KB.
- Brand: Bk-precision-1245-instruction
- Model: MANUAL
- Type: Manual
- File size: 667.0 KB
Overview
Brief overview of the product.
Specifications
- Key spec 1
- Key spec 2
Controls & Indicators
Control panel/button layout.
Installation / Setup
- Step 1…
- Step 2…
Operation
Basic usage, modes, cycles.
Troubleshooting & Error Codes
| Issue / Code | Fix |
|---|---|
| Example | How to fix… |
Safety & Warnings
- Important warning…
Downloads
Bk-precision-1245-instruction Overview
The Bk-precision-1245 is a versatile digital multimeter designed for accurate electrical measurements in both professional and hobbyist environments. This device provides precise readings of voltage, current, resistance, and continuity, making it an essential tool for troubleshooting, testing, and maintenance of electrical circuits and components.
Main Features and Specifications
- Measurement Functions: AC/DC Voltage, AC/DC Current, Resistance, Continuity, Diode Test
- Display: Large backlit LCD for clear visibility in various lighting conditions
- Measurement Range: Up to 600V AC/DC voltage, 10A current range
- Auto and Manual Range Selection for flexible operation
- Data Hold and Relative Measurement Modes
- Overload Protection to safeguard the device and user
- Compact and ergonomic design with durable casing
- Battery-powered with low battery indicator
Basic Usage and Operation Tips
Before using the Bk-precision-1245, ensure the device is properly calibrated and the battery is sufficiently charged. Select the appropriate measurement mode and range for your application. Always connect the test leads correctly: the black lead to the common (COM) terminal and the red lead to the appropriate input terminal based on the measurement type. For voltage and resistance measurements, connect the leads in parallel or series as required. Use the data hold function to freeze readings for easier analysis.
Troubleshooting and Maintenance
If the multimeter displays erratic readings or fails to power on, check the battery level and replace if necessary. Inspect test leads for damage or wear and replace faulty leads immediately. Clean the device regularly with a dry cloth and avoid exposure to moisture or extreme temperatures. If the device experiences persistent errors, consult the user manual or contact authorized service centers for repair. Avoid opening the casing to prevent voiding the warranty.
Safety Reminder
Always follow proper safety procedures when using the Bk-precision-1245 multimeter. Never exceed the specified measurement limits to avoid electric shock or damage. Use insulated test leads and avoid contact with live circuits. Disconnect power sources before measuring resistance or continuity. Wear appropriate personal protective equipment and work in a safe environment to minimize risk.