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Power Supply
QL Series
Service manual
TTI QL Series Service Manual
Precision power supplies
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Table Of Contents
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Contents
Table of Contents
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Table of Contents
Table of Contents
Specification
Main Outputs
Emissions
Immunity
Cautions
Emc
Safety
Dismantling the Instrument
Service Handling Precautions
General
Power Pcb
Circuit Descriptions
Control Pcb
Auxiliary Output
Interface Pcb
Servicing Note
Equipment Required
Ql355
Calibration
Ql564
Pcb Assembly – Power – Ql355 (44117-0010)
Parts List
Block Diagram
Single PSU
Triple PSU
Interconnection Diagram
Component Layouts
Auxiliary Terminal Pcb (Triple Only)
Auxiliary Power Pcb (Triple Only)
Main Terminal Pcb
Keyboard/Display Pcb (Single)
Keyboard/Display Pcb (Triple)
AC Supply Connection Pcb
Main Output Front Panel
Circuit Diagrams
Auxillary Power - Front Panel Terminal Pcb
Auxillary Power - Power Pcb
Keyboard & Display Pcb - Single
Keyboard & Display Pcb - Triple
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Specification
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General
3
Circuit Descriptions
4
Calibration
5
Block Diagram
6
Circuit Diagrams
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QL Series
Precision Power
Supplies
Service Manual
Book Part Number 48511-0670 - Issue 1
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Summarization of Contents
QL Series Service Manual
Specification
Details electrical and performance parameters for the power supply units.
General
Covers AC input, operating conditions, safety, and EMC compliance for the instrument.
EMC
Outlines EMC directive compliance, emissions, immunity tests, and performance criteria.
Safety
Provides critical safety instructions, warnings, and symbol explanations for instrument operation.
General Service Information
Discusses precautions for handling, servicing, and dismantling the instrument safely.
Circuit Descriptions
Explains the functionality of the Power, Control, and Interface PCBs within the power supply.
Calibration
Details the procedure and required equipment for calibrating the power supply outputs accurately.
Parts List
Comprehensive listing of all components and assemblies used in the instrument.
Block Diagram
Provides a high-level overview of the internal functional blocks and signal flow of the power supply.
Interconnection Diagram
Illustrates how different PCBs and modules are connected within the single and triple PSU configurations.
Component Layouts
Shows the physical placement of components on key PCBs like Control, Power, Interface, and Keyboard.
Circuit Diagrams
Presents detailed schematic diagrams for various sections like AC supply, control, power, and interface circuits.
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