Schematic Diagrams and Service Manuals

Electronics Repair Manuals

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42 Schematic Diagrams

Common note for schematic diagrams 4-2. schematic diagrams THIS NOTE IS COMMON FOR SCHEMATIC DIAGRAMS (For schematic diagrams) 4-2. schematic diagrams 4-2. SCHEMATIC DIAGRAMS For Schematic Diagram 4-2. schematic diagrams For Schematic Diagram 4-2. schematic diagrams For Schematic Diagram 4-2. schematic diagrams

51 Schematic Diagram Notes

The following block diagram, schematic diagram, PW. board diagram, etc., are presented merely as reference materials to help judge any unsatisfactory PWB to be replaced for eventual repair. Except a part of the component parts, electrical parts are not included in the service parts supply targets.

4 Printed Wiring Boards And Schematic Diagrams

Schematic 7 CA-66 (LENS DRIVE) Schematic Diagram 9 PS-440 (SH DSP) Schematic Diagram 15 PS-440 (MEMORY (SH DSP)) Schematic Diagram 17 PS-440 (CAMERA DSP) Schematic Diagram 19 Schematic HI-74 (VIDEO,EVR) Schematic Diagram 31 HI-74 (USB l F) Schematic Diagram 33 HI-74 (HI CONTROL) Schematic Diagram 35 HI-74 (AUDIO) Schematic Diagram 37 BT-2 Schematic Diagram 43 DD-150 Schematic Diagram

The Chassis Of This Receiver Is Directly Connected To The Ac Power Line

COMPONENTS IDENTIFIED BY A MARK ON THE SCHEMATIC DIAGRAMS, EXPLODED VIEWS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. CIRCUIT ADJUSTMENTS THAT ARE CRITICAL TO SAFE OPERATION ARE IDENTIFIED IN THIS MANUAL. FOLLOW THESE PROCEDURES WHENEVER CRITICAL COMPONENTS ARE REPLACED OR IMPROPER OPERATION IS SUSPECTED.

Norlin Music 7166817242

Moddare Nec Vt440

Controls Rear Panel Schematic Polypedal Schematic Keyboard Assembly Schematic Voltage Controlled Filter and Keyboard Circuit Printed Circuit Board Assembly Schematic Diagram Reference and Modulation Oscillator Waveshape and Keyboard Control Printed Circuit Board Assembly Schematic Diagram Fixed and Variable Resonant Filters Printed Circuit Board Assembly Schematic Diagram String Filter Board No. 1 Printed Circuit Board Assembly Schematic Diagram Piano Filter Board No. 2 Printed Circuit Board Assembly Schematic Diagram Organ Filter Board No. 3 Printed Circuit Board Assembly Schematic Diagram Harpsicord Filter Board No. 4 Printed Circuit Board Assembly Schematic Diagram Funk Filter Board No. 5 Printed Circuit Board Assembly Schematic Diagram Clavinet Filter Board No. 6 Printed Circuit Board Assembly Schematic Diagram Vibes Filter Board No. 7 Printed Circuit Board Assembly Schematic Diagram Mode Filter For Brass Printed Circuit Board Assembly Schematic Diagram Right Hand Control and...

Product Safety Notice

Many electrical and mechanical parts in this chassis have special safety-related characteristics. These characteristics are often passed unnoticed by a visual inspection and the protection afforded by them cannot necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in this manual and its supplements electrical components having such features are identified by the international hazard symbols on the schematic diagram and the parts list.

418 Highvoltage Power Supply

Figure 5-8 is a schematic diagram of the highvoltage power supply, including the CRT. Oscillator Q302 operates at a frequency of about 32 kc. Any change in the output voltage is applied to the grid of V301, which converts the voltage change to a current change. This current change is applied by emitter follower Q301 to the base of the oscillator transistor. The amplitude of oscillations is changed in such direction as to oppose the original output voltage change. High Voltage Adjust R319 sets the amplitude of oscillation to produce the correct output voltage.

14 Organization of the Service Manual

This manual focuses on component-level repair of the Fluke 45 Dual Display Multimeter. To that end, manual chapters are often interdependent effective troubleshooting may require not only reference to the troubleshooting procedures in Chapter 5, but also some understanding of the detailed Theory of Operation in Chapter 2 and some tracing of circuit operation in the Schematic Diagrams presented in Chapter 9. The troubleshooting procedures presented in this chapter rely closely on both the Theory of Operation presented in Chapter 2 and the Schematic Diagrams shown in Chapter 9. Chapter 3 provides access information. Each option is allocated a separate chapter 7 for the Battery Pack Option -01 and 8 for the IEEE-488 Interface Option -05. Option -15 incorporates both Options -01 and -05. Chapter 7 includes the full range of Service Manual topics (specifications, theory of operation, maintenance, list of replaceable parts, etc.) for the Battery Pack option. Schematic diagrams for the...

Inductor circuit symbols

Figure 2-6 shows various circuit symbols used in schematic diagrams to represent inductors. Figures 2-6A and 2-6B represent alternate, but equivalent, forms of lhe same thing i.e., a fixed value, air-core inductor (coil in the vernacular). The other forms of inductor symbol shown in Fig. 2-6 are based on Fig, 2-6A but are just as valid if the open-loop form of Fig- 2-6B is used instead. Variable inductors are shown in Figs. 2-6D and 2-6E. Both forms are used in schematic diagrams, although in some countries Fig. 2-6D implies a form of construction whereby a wiper or sliding electrical contact rides on the uninsulated turns of the coil. Figure 2-6E implies a construction where variable Inductance is achieved by moving a magnetic core inside of the coil.

Important Safety Notice

There are special parts used in Panasonic LCD Projectors which are important for safety. These parts are shaded on the schematic diagram. It is essential that these critical parts should be replaced with manufacturer's specified parts to prevent shock, fire, or other hazards. Do not modify the original design without permission of PANASONIC BROADCAST & TELEVISION SYSTEMS COMPANY. 12 Schematic

Operational Amplifiers with Single Ended Outputs

An ideal op amp with a single-ended output has a differential input, infinite voltage gain, infinite input resistance, and zero output resistance. A conceptual schematic diagram is shown in Fig. 6.1. While actual op amps do not have these ideal characteristics, their performance is usually sufficiently good that the circuit behavior closely approximates that of an ideal op amp in most applications.

46 Lowvoltage Power Supply

Figure 5-6 is a schematic diagram of the low voltage power supply in the Model 140A. The primary winding of transformer T101 is wired for quick conversion (using the 115 230 volt switch) from 115-volt to 230-volt operation. In addition to the line fuse, each of the regulated supplies is provided with over-current protection. Fuses areusedfor the-100, + 100, and +250 volt supplies, and a transistorized protection circuit is used in the -12.6 volt supply. To reduce power dissipation in the series regulators when high-current plug-ins are used, two shunt resistors are provided across each of the series regulator transistors. Whether or not these shunts are used depends upon the wiring of the plug-ins used. Both shunt resistors in each case are of the same value. One is connected in the circuit if the horizontal plug-in is a high-current unit, the other if the vertical plug-in is a high-current unit thus either or both may be used.

Introduction and Specifications

This manual presents service information for the Fluke 77 Series III Multimeter. The manual includes a theory of operation, general maintenance procedures, performance tests, calibration procedures, troubleshooting information, a list of replaceable parts, and schematic diagrams. Provides complete maintenance information, from general maintenance and cleaning instructions to detailed troubleshooting and repair procedures to the component level. Troubleshooting and repair procedures rely heavily on both the Theory of Operation presented in Chapter 2 and the Schematic Diagrams shown in Section 5. Chapter 5 Schematic Diagrams Includes schematic for the A1 Main PCA. Special terms (mnemonics) used in text descriptions of meter circuitry correspond to terms used on the schematic diagrams in Chapter 5.

Troubleshooting Techniques

Often the defective component can be located by checking the appropriate voltage or waveform in the circuit. Typical voltages are listed on the schematic diagrams. Waveforms are shown adjacent to the schematics, and waveform test points are indicated on both the schematics and circuit board illustrations by hexagonal-outlined numbers. Voltages and waveforms given on the schematic diagrams are not absolute and may vary slightly between instruments. To establish operating conditions similar to those used to obtain these readings, see the Voltage and Waveform Setupconditions in the Diagrams section for the preliminary equipment setup. Note the recommended test equipment, initial front-panel control settings, and cable-connection instructions. The control-setting changes (from initial setup) required to obtain the given waveforms and voltages are located on the waveform-diagram page.

Safety Precautions

The chassis of this projector is isolated (COLD) from AC line by using the converter transformer. Primary side of the converter and lamp power supply unit circuit is connected to the AC line and it is hot, which hot circuit is identified with the line ( ) in the schematic diagram. For continued product safety and protection of personnel injury, servicing should be made with qualified personnel.

21 Introduction

Section 2 provides a basic theory of operation for the Series 10 Multimeters. Electrical components on the printed circuit assembly (A1 Main PCA) are listed in Table 2-1. Refer to Figure 4-2 for the location of these components and Figures 4-3 through 4-5 for the schematic diagrams.

Flyback Converters

Vpl Es2 Power Supply

A simplified functional schematic diagram of the flyback subcircuit is shown in Fig. 5.1. It is included in the Power IC Model Library for PSpice available from AEi Systems. It is a universal subcircuit that is capable of simulating the flyback regulator in both the continuous and discontinuous modes of operation with either voltage mode or current mode control. The derivation of the model is as follows.

3 Block Diagrams

OVERALL BLOCK DIAGRAM (1 2) ( ) Number in parenthesis ( ) indicates the division number of schematic diagram where the component is located. ( ) Number in parenthesis ( ) indicates the division number of schematic diagram where the component is located. ( ) Number in parenthesis ( ) indicates the division number of schematic diagram where the component is located. 3-3. POWER BLOCK DIAGRAM (1 2) ( ) Number in parenthesis ( ) indicates the division number of schematic diagram where the component is located. 3-4. POWER BLOCK DIAGRAM (2 2) ( ) Number in parenthesis ( ) indicates the division number of schematic diagram where the component is located. 4-2. schematic diagrams PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS 4-1. FRAME SCHEMATIC DIAGRAM (1 2) FRAME SCHEMATIC DIAGRAM(1 2) FRAME SCHEMATIC DIAGRAM (1 2) 4-2. schematic diagrams FRAME SCHEMATIC DIAGRAM (2 2) FRAME SCHEMATIC DIAGRAM(2 2) FRAME SCHEMATIC DIAGRAM (2 2)

WLPCBoard

Lb50u Schematic

12 Schematic Diagram Schematic Diagram for Model PT-LB50NTU LB50U LB50SU THE SHADED AREA ON THiS SCHEMATIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM FIRE AND ELECTRICAL SHOCK HAZARDS, Schematic Diagram for Model PT-LB50NTE EA, LB50E EA, LB50SE EA Schematic diagram Schematic diagram Schematic diagram Schematic diagram Schematic diagram The power circuit board contains a circuit area using a separate power supply to isolate the ground connection. The circuit is defined by HOT and COLD indications in the schematic diagram. Take the precautions below 8. This schematic diagram is the latest at the time of printing and the subject to change without notice. Precautions

General Description

In the following overall functional description of the 2213 Oscilloscope, refer to the basic block diagram (Figure 3-1) and to the detailed block diagram (Figure 9-4) located in the Diagrams section of this manual. In Figures 3-1 and 9-4, the numbered diamond symbol in each major block refers to the appropriate schematic diagram number.

Troubleshooting Aids

Schematic Diagrams Complete schematic diagrams are located on tabbed foldout pages in the Diagrams section. The portions of circuitry that are mounted on each circuit board are enclosed within heavy black lines. Also within the black lines, near either the top or the bottom edge, are the assembly number and name of the circuit board. Component numbers and electrical values of components in this instrument are shown on the schematic diagrams. Refer to the first page of the Diagrams section for definitions of the reference designators and symbols used to identify components. Important voltages and waveform reference numbers (enclosed in hexagonal-shaped boxes) are also shown on each diagram. Waveform illustrations are located adjacent to their respective schematic diagram, and the physical location of each waveform test point is shown on the appropriate circuit board illustration. Circuit board illustrations (showing the physical location of each component) are provided for use in...

Table Of Contents

CCD BLOCK Schematic Diagram 20 3-7. CAMERA BLOCK Schematic Diagram 21 3-8. PROCESS BLOCK Schematic Diagram 22 3-9. POWER BLOCK Schematic Diagram 23 3-10. LCD-EVF BLOCK Schematic Diagram 24 3-11. F SW BLOCK Schematic Diagram 25 3-12. M SW BLOCK Schematic Diagram 25 3-13. KEY SW BLOCK Schematic Diagram 26 3-14. MOTOR BLOCK Schematic Diagram 27 3-15. POWER ON BLOCK Schematic Diagram 28 3-16. FLASH BLOCK Schematic Diagram 29 3-17. R SW BLOCK Schematic Diagram 30

Optical Unit10

SCHEMATIC DIAGRAM NOTES 26 5.3. INTERCONNECTION SCHEMATIC DIAGRAM 28 5.5. LCD DRIVE SECTION SCHEMATIC DIAGRAM (MAIN PWB) V-LSEP3030D1 32 5.6. RGB VIDEO SECTION SCHEMATIC DIAGRAM (MAIN PWB) V-LSEP3030D1 34 5.7. POWER AUDIO SECTION SCHEMATIC DIAGRAM (MAIN PWB) V-LSEP3030D1 36 5.10. OPERATION SCHEMATIC DIAGRAM (V-LESP0A34A1) 5.11. THERMISTOR SCHEMATIC DIAGRAM (V-LSEP0A35A1)

Caution

Components indicated by a mark in this schematic diagram have the special significance in the safety. It is therefore, particularly recommended that the replacement of those parts must be made by exactly the same parts.Must be used with a specified fuse. Unauthorized substitutions may result in fire or accident. This projector is isolated from AC line by using the internal converter transformer. Please pay attention to the following notes in servicing.

Rotor construction

Figure 5.11 Schematic diagram of wound rotor for induction motor, showing sliprings and brushes to provide connection to the external (stationary) 3-phase resistance Figure 5.11 Schematic diagram of wound rotor for induction motor, showing sliprings and brushes to provide connection to the external (stationary) 3-phase resistance

Linear Ic

POWER SUPPLY SUBASSEMBLY TROUBLESHOOTING Troubleshoot the power supply subassembly using the circuit description. Note that voltage levels displayed on the schematic diagrams are not absolute values as reari jus may vary between units. Once the probl Uls localized, check the .suspected part by direct substitution if possible. Otherwise, use a voltmeter or oscilloscope to determine the malfunctioning part. Note the color code on the power supply schematics +15V (red), -15V (black), 45V (yellow), ground (green).

Test Results

Use this section in conjunction with Section 3, Performance Verification, and Section 6, Spare Parts. To remove and replace a part you suspect is defective, follow the instructions in Section 5, Disassembly Guide. The functional circuit analysis, located in the Technical Supplement at the end of this manual, offers information on how the device functions, as well as part locator diagrams and detailed schematic diagrams.

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