SONY KVB14K3
Instrukcja Serwisowa

KV-B14K3
RM-849S

SECTION 4 CIRCUIT ADJUSTMENT

4-1. A BOARD ADJUSTMENT
ANTI PAL, LINE CRAWLING ADJUSTMENT (RV301, RV302, T301) � ANTI PAL ADJUSTMENT 1. Input the PAL color-bar signal. 2. Set the PIC, COL and BRT controls to normal. 3. Connect the oscilloscope to pin 3 of CN301 connector. 4. Adjust RV301 (SBM) and RV302 (PHASE) to obtain the waveform as shown below.
RV301 SBM RV503 V. SIZE RV502 V. LIM CV358 CV443 T301 RV551 V. CENT RV302 PHASE RF. AGC
S801

H. CENT

IC001

IC301

wrong pattern

/

right pattern

� LINE CRAWLING ADJUSTMENT 1. Input the PAL color-bar signal. 2. Set the PIC, COL, and BRT controls to normal. 3. Connect the oscilloscope to pin 3 of CN301 connector. 4. Adjust T301 for minimum line crawling.

A BOARD � component side �

L807

IF201

RF AGC ADJUSTMENT (IF201) 1. Receive a strong off-air signals. 2. Adjust RF AGC VR control so that snow noise and crossmodulation disappear from the picture. A�P�C ADJUSTMENT (CV443) (PAL) 1. Short circuit between pin 4 and pin $¶ of IC301 with jumper. 2. Input the PAL color-bar signal. 3. Set the PIC, COL and BRT controls to normal. 4. Adjust CV443 for suitable color intensity. 5. Remove the jumper.

L807

H. SIZE (HORIZONTAL SIZE)

RV503

V. SIZE (VERTICAL SIZE)

RV502

V. LIN (VERTICAL LINEARITY)

S801

H. CENT (HORIZONTAL CENTER)

RV551

V. CENT (VERTICAL CENTER)

� 14 �