Magnavox 19MF301B Service Manual download pdf (Page 55)

9-6

[TYPE B]

FL11.0BBLS

1. System Control Block Diagram

MAIN CBA

CN302

CN302

TO

INVERTER

BLOCK

DIAGRAM

TO

POWER SUPPLY

BLOCK DIAGRAM

PROTECT2

PROTECT1

P-ON-H2

P-ON-H1

CN102

CN301

Q172

CN301

Q3006

Q3005

PROTECT3

BACKLIGHT-SW

BACKLIGHT-ADJ

IC201,Q207,

Q208,Q209

DRIVE

VCOM

KEY SWITCH

FUNCTION CBA

CN101B

REMOTE

SENSOR

RS101

AL+3.3V

D104

POWER

STANDBY

D103

LED144

REMOTE22

P-ON-H155

KEY-IN166

Q171

R12

IC3005

(MAIN MICRO CONTROLLER)

DIGITAL MAIN CBA UNIT

CN3006

CN3005

XOUT25

XIN25

X3001

25MHz

OSC

H15

H16

PROTECT3

B13

VCOM-PWM F2

PROTECT2 D13

PROTECT1 C13

KEY-IN1 A15

BACKLIGHT-SW E2

LED1

LED-R

J16

G1

D1

P-ON-H2

B16

REMOTE

C14

P-ON-H1

C1

F13

CN3002

F3BACKLIGHT-ADJ

IC3006 (MEMORY)

SCK

SI

SO

T11

P11

R11

P12

6

5

2

1

T12

SCL

SDA

CN3002

CS

SCK

SIN

SOUT

CS

22

22

SCL

21

21

SDA

11

11

PROTECT1

15

15

PROTECT2

5

5

PROTECT3

29

29

VCOM-PWM

26

26

BACKLIGHT-SW

28

28

BACKLIGHT-ADJ

KEY-IN129 29

P-ON-H199

LED-R13 13

REMOTE25 25

LED127 27

P-ON-H211

TO AUDIO

BLOCK

DIAGRAM

AUDIO-MUTE

INPUT0

INPUT1

AUDIO-MUTE

INPUT0

INPUT1

G13

SCL

SDA

4

5

TU302 (TUNER UNIT)

SCL

SDA

9

8

TU301 (TUNER UNIT)

Either TU301 or TU302 is used for Main CBA.

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