M113 View Datasheet(PDF) - Unspecified

Part Name

Description

Manufacturer

M113

SERVICE MANUAL M113 (SUPER ONE-CHIP CHASSIS)

Unspecified 

TCL

Part Ⅲ-Brief Introduction on Chassis

M113 Chassis Service Manual

Z141

W/Nicam

K3955K

N/Nicam

K2966

Nicam Option

NICAM BD

IC602

TDA8944

SIF

RF IN

IF Q101

TUNE R

IF AMP

Z141

SAWFILTER

IF

I2C B US

AV INPUT

OUTPUT

X-TA L

8MHz

IC 101

TMPA8809 (M113)

IC601

NJW1136

I2C B US

24C08

E2PROM

IC301

V-OUTP UT

TDA8172

Hi-POT

REMO TE

HANDSE T

RECE IVER

KEY MATRIX

Q411

H DRIVE

H OUTP UT

FBT

IC801

MC44608

Q801

BUZ91A

T803

POWER

TRANS IS TOR

30V

B+,

12V,9V,5VA

16V

5V

1.RF、IF AMP

The tuner receives, selects and amplifies RF signal, frequency mixes with local oscillate source, gets

38.0MHz&38.9MHz IF signal via C107 to Q101.After Q101 amplifing about 20dB,the PIF(Picture IF) and

SIF(Sound IF) are separated. Having passed sawfilter, PIF signal sent to TMPA8809 in pin 41,42.The IF

signal pass the video detect circuit to generate CVBS signal. Then the processor deals the signal with

luminance and chroma separation. The processor also deals the chroma siganl with integrated chroma

BPFs, PAL/NTSC demodulation and deals luminance signal with integrated chroma traps, black strech,

Y-gamma, so that the resolution of picture details is improved and Y signal is well timed with chroma signal.

The processor also deals the chroma signal with chroma sub-carrier recovery, color system recognition

and color signal decoding, then output R\G\B to CRT board. Via three groups dual emitter amplifiers to

drive KR\KG\KB. On the other hand, the processor separated by video detect circuit. Having passed the

horizontal & vertical frequency dividing circuit, H&V OSC signal, which be generated by H-AFC&V-AFC,

then output H&V signal which wave is sawtooth.

2.Channel Selection

The RF signal is converted into IF signal by the tuner. Then the IF signal cross the IF amplifier circuit(IF

pre-amp) to get a gain about 15dB. By the coupling capacitance(C107) and the match resistance R107,the

input resistance of the IF pre-amplifier match with the tuner. The signals pass a parallel connection circuit

with voltage NFB, which the input and output impedance is lower, of wide dynamic rage.R106 is the NFB

resistance, which is used to adjust the gain in the pass band. Having been amplified by the IF amplifier, the

IF signal pass the IF sawfilter K3955K(and C109 is the coupling cap.).Than PIF signal been sent from pin

4,pin5 of sawfilter to pin 41,pin42 of super one chip(TMPA8809).The processor deal the PIF signal with IF

4

02/12/09

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