Panasonic EURO-5VP Service Manual

VOL. 3 - 41

COLOUR TELEVISION

EURO-5VP CHASSIS

CIRCUIT EXPLANATIONS

ORDER NO. ITD9904010C2

WARNING

This service information is designed for experienced repair technicians only and is not designed for use by the general

public. It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting

to service a product. Products powered by electricity should be serviced or repaired only by experienced professional

technicians. Any attempt to service or repair the product or products dealt with in this service information by anyone

else could result in serious injury or death.

FORWARD

We would like to express our sincere gratitude for your outstanding efforts in selling and servicing Panasonic Colour Televisions. We are convinced that you have and will continue to make your best efforts to improve your engineering techniques, and to obtain the highest results in your daily servicing. We are now introducing this "Technical Guide" to assist you and make your servicing tasks easier and more rapid. This Technical Manual focuses on an explanation of the new circuit technology employed in the EURO-5VP Chassis used in our Video Projection System Television. Please see the service manuals for details concerning the circuits and adjustment methods. The EURO-5VP Chassis is for a video projector, and is based on the EURO5 Chassis.

CONTENTS

1. MICRO PROCESSOR UNIT..............................................................................................4

2. SINGLE ABL.................................................................................................................... 5

3. SHADING ........................................................................................................................6

4. PREVENTION OF PROJECTION TUBE BURN-OUT........................................................ 6

5. SINGLE COLOUR MODE ................................................................................................. 7

6. PROTECTION..................................................................................................................8

7. DIGITAL CONVERGENCE ...............................................................................................9

1. Micro Processor Unit

IC7702

IC1101 MPU

Remote control

Stop

IC7106 Sub MPU

SDA4, SCL4

IC7101

IC7101 EEPROM

EEPROM

MPU(IC1101) of EURO5-VP chassis uses same as EURO5 chassis’s device(SDA5450C48-1). The difference points are as below.

Pin No. EURO5-VP EURO5

69 SCL4 Not use 70 SDA4 Not use 76 Remote control Stop 50/100

IC7103 RGB Cont.

WB DAC

IC7707 Single Colour

IC453 Deflection Cont.

Pin No. 69 & 70

These bus lines are used for optical circuit control of projection TV. EURO5 chassis has 3 bus line, EURO5-VP chassis is operated by 4 bus line.

Pin No. 76

During the digital convergence mode, digital convergence circuit is operated by SUB MPU(IC7106). During that time, Main MPU(IC1101) is stopped by Hi voltage applies to pin No.76 of Main MPU.

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