Sony Transitron KV-B14K3, Руководство по обслуживанию, Страница: 10 / 20

– 14 –
KV-B14K3
RM-849S
4-1. A BOARD ADJUSTMENT
RF AGC ADJUSTMENT (IF201)
1. Receive a strong off-air signals.
2. Adjust RF AGC VR control so that snow noise and cross-
modulation 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.
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.
/
right
pattern wrong
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.
S801 H. CENT (HORIZONTAL CENTER)
L807 H. SIZE (HORIZONTAL SIZE)
RV503 V. SIZE (VERTICAL SIZE)
RV551 V. CENT (VERTICAL CENTER)
RV502 V. LIN (VERTICAL LINEARITY)
V. SIZE
RV503
V. LIM
RV502
IC001
IC301
CV358
CV443
T301
L807
IF201
A BOARD
– component side –
SBM
RV301
V. CENT
RV551
H. CENT
S801
PHASE
RV302
RF. AGC
SECTION 4
CIRCUIT ADJUSTMENT