Circuit Adjustments; A Board Adjustments - Sony Transitron KV-B14K3 Service Manual

KV-B14K3
RM-849S
4-1. A BOARD ADJUSTMENT
RV503
V. SIZE
RV551
V. CENT
A BOARD
– component side –
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.
SECTION 4
CIRCUIT ADJUSTMENT
IC001
RV301
SBM
RV502
IC301
V. LIM
CV358
CV443
T301
RV302
PHASE
RF. AGC
L807
IF201
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.
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.
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)
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right
/
pattern