BBK LT2007 Service Manual

SERVICE MANUAL

LT2007

CONTENTS

1. SAFETY PRECAUTIONS……………………………………………………………………………………..2

2. FUNCTIONS OF REMOTE CONTROL BUTTONS AND PANEL BUTTONS ……………………………….4

3. Connecting Figure………………………………………………………………………………………………..5

4. Trouble Shooting…………………………………………………………………………………………………8

5. Assembling and disassembling the mechanism unit……………………………………………………………11

6. Ic Block Diagram & Description…………………………………………………………………………………51

7. P.C.B Wiring Diagram……………………………………….……………………………………………………52

8. Bom Of Audio Board For Lt2007…………………………………………………………………………………60

9. LT2007 Exploder and sch……………………………………………………………………………………………………92

1. SAFETY PREAUTIONS

ELECTRO STATIC DISCHARGE(ESD)TO

2. PREVENTION OF

ELECTROSTATICALLY SENSITIVE(ES)DEVICES

2

2. Control Button Locations and Explanations

Remote Control Illustration

Front Panel Illustration

3

4 5

OTHER INFORMATION

6 7 8

Assembling and disassembling the mechanism unit

9

10

IC BLOCK DIAGRAM & DESCRIPTION

6.1 RTD2020

6.1.1 FEATURES

11

12 13

7.1.2 BLOCK DIAGRAM

7.1.3 PIN ASSIGNMENTSCONTENTS

14

7.1.4 PIN DESCRIPTIONS

In order to reduce pin count, and therefore size and cost, some pins have multiple
functions. In those cases, the functions are separated with a “/” symbol. Refer to the
Pin Assignment diagram for a graphical representation.

A = Analog P = Power
I = Input G = Ground
O = Output

ADC

PLL

15

Control Interface

16

Digital Input

Display Port

17

Miscellaneous Interface

DDC Channel

Power & Ground

18

MCU Interface

19

7.2 STV82x6

Multistandard TV Audio Processor
and Digital Sound Demodulator

20

I/O Pin Description

Legend / Abbreviations for Table 2:

Type:

??AP = Analog Power Supply
??DP = Digital Power Supply
??I = Input
??O = Output
??OD = Open Drain
??B = Bidirectional
??A = Analog

21

22

23

24

25

26

27

28

29