Sanyo CE14A2-C - Page 17

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Service manual CHASSIS 2112-Series EC7-A

4.3.5.1 Heater supply. .................................................................................................................................. 12

4.3.6 EHT discharge........................................................................................................................................ 12

4.3.7 Protections.............................................................................................................................................. 12

4.3.7.1 Low Flyback protection..................................................................................................................... 12

4.3.7.2 Heater short-circuit protection.......................................................................................................... 12

4.3.7.3 Beam current overconsumption protection. ..................................................................................... 13

4.3.7.4 C656 open-circuit protection. ........................................................................................................... 13

4.4 V

ERTICAL DEFLECTION

. ................................................................................................................................... 13

4.4.1 Vertical deflection suppliers.................................................................................................................... 13

4.4.2 Vertical deflection protection................................................................................................................... 13

4.5 B

EAM CURRENT LIMITER AND GEOMETRY COMPENSATIONS

................................................................................ 13

4.5.1 BCl signal generation.............................................................................................................................. 13

4.5.2 Geometry compensations....................................................................................................................... 13

4.5.2.1 Width and height compensation....................................................................................................... 13

4.5.2.2 Phase compensation........................................................................................................................ 13

4.5.3 ABL description....................................................................................................................................... 14

4.5.3.1 BCL signal generation...................................................................................................................... 14

4.5.3.2 Contrast and brightness reduction. .................................................................................................. 14

4.6 T

UNER AND TUNING CIRCUIT

. ........................................................................................................................... 14

4.7 V

IDEO SIGNAL PROCESSING

............................................................................................................................. 14

4.7.1 Video processor...................................................................................................................................... 14

4.7.1.1 Video processor versions................................................................................................................. 14

4.7.1.2 IF video............................................................................................................................................. 14

4.7.1.3 Horizontal and vertical synchronisation............................................................................................ 15

4.7.1.4 Geometry processor......................................................................................................................... 15

4.7.1.5 Video filter and switches................................................................................................................... 16

4.7.1.6 Colour decoder................................................................................................................................. 16

4.7.1.7 RGB processing............................................................................................................................... 16

4.7.1.8 RGB control...................................................................................................................................... 16

4.7.1.9 Supply and Bandgap........................................................................................................................ 17

4.7.2 Block diagrams of video paths................................................................................................................ 17

4.8 A

UDIO SIGNAL PROCESSING

............................................................................................................................. 17

4.8.1 Audio processor...................................................................................................................................... 17

4.8.2 AM sound................................................................................................................................................ 17

4.8.3 L’ system................................................................................................................................................. 18

4.8.4 Audio switching....................................................................................................................................... 18

4.8.5 Speaker amplifier.................................................................................................................................... 19

4.9 RGB

AMPLIFIER

. ............................................................................................................................................. 19

4.10 CRT

SOCKET CONNECTOR

........................................................................................................................... 19

4.11 P

ERIPHERAL CONNECTIONS TO

SET

......................................................................................................... 19

5. CONFIGURATION AND ADJUSTMENTS.......................................................................................................... 19

5.1 S

ERVICE MENU

................................................................................................................................................ 19

5.1.1 Service menu navigation. ....................................................................................................................... 20

5.1.2 Meaning of each adjustment................................................................................................................... 21

5.2 A

DJUSTMENTS

. ............................................................................................................................................... 22

6. SPECIAL MODES AND PROCEDURES............................................................................................................ 23

6.1 S

ECAM

B/G – L

ADAPTATION

........................................................................................................................... 23

6.2 NTSC M (NTSC 3, 579545)

ADAPTATION

....................................................................................................... 24

6.3 P

ROCEDURE OF SUBSTITUTION OF MICROPROCESSOR

IC100............................................................................ 24

6.3.1 TV sets without TXT: OTP replacement with a mask............................................................................. 24

6.3.2 TV sets with TXT: OTP replacement with a mask. ................................................................................. 25

6.4 I

NITIAL AUTO TUNING SETTING

.......................................................................................................................... 25

6.5 P

ROCEDURE OF NON

VOLATILE MEMORY SUBSTITUTION

.................................................................................... 25

6.6 “F

ACTORY

”

MODE DESCRIPTION

. ...................................................................................................................... 25

6.7 D

ESCRIPTION OF

“H

OTEL

”

AND

“R

ENTAL

”

MODES

.............................................................................................. 25

7. FAILURE LOCATION.......................................................................................................................................... 26

7.1 I

NTRODUCTION

................................................................................................................................................ 26

7.2 T

HE START

UP PROCEDURE

............................................................................................................................. 26

7.3 P

ROTECTIONS

................................................................................................................................................. 26

7.4 I

NDICATION OF ERRORS