Sony TRINITRON KV-M1400K Service Manual page 17

KV-M1400/M1401
(RV502) |
signal, then connect an electrolytic
en pin (28) and GND of IC502.
) stop scrolling of the picture in the
e electrolytic capacitor.
able
325+50Hz2
justment (CT332)
pattern.
?) of IC331 and ground.
rf synchronization.
m 1C331.
ment (LV301) |
AR pattern.
he Q302 emitter.
'orm becomes flat.
aU
After Adjustment
stment (RV331 R-Y L331 B-Y)
AR pattern.
din (1) of IC301.
vhite and black parts of the waveform
f0: too high
in (3) of IC301.
hite and black parts of the waveform
evel
(white and black levels
should become 0 level)
(After Adjustment)
KV-M1400/M1401
RM-841 RM-841
CIRCUIT ADJUSTMENTS
[ M1400K/M1401K ]
H.FREQ Adjustment (RV502)
4-2. ABOARD ADJUSTMENTS
RVOO1
@
CT332
REF OSC lo
ear a = 8
1 pean GB L334
[RY] © [BYJavso.
[sr] /AR-CENT]
be
YS)1C502
RV801
RV503 @
2.
[SzE)[acc] | | @Avse
[VsiZE]
Rv505[V SZ]
RV501
A-BOARD
— Component side —
TU AGC Adjustment (RV503)
1. Tune in an off air signal.
2. Adjust AGC VR (RV503) so that snow-noise anaeboees modulation
just disappear from the picture.
RV504 H.CENT (HORIZONTAL CENTER)
-L-E
RV801 H.SIZE (HORIZONTAL SIZE)
ca ee) FE
RV501 V.CENT (VERTICAL CENTER)
LI-CIHL
RV505 V.SIZE (VERTICAL SIZE)
REF OSC 7.16 MHz Adjustment (CT 331)
Input an NTSC COLOR BAR pattern.
Short circuit between pin '28! of IC 331 and ground.
Adjust CT 331 to obtain color synchronization.
Remove the jumper wire trom IC 331.
PN Io
1. Input a PAL COLOR BAR signal, then connect an electrolytic
capacitor (100/16 V) between pin @e) and GND of IC502.
Adjust RV502 (H.FREQ) to stop scrolliag of the picture in the
horizontal direction.
After adjustment, remove the electrolytic capacitor.
f0: suitable
f0: 15.625+50Hz
REF OSC 8.8 MHz Adjustment (T332)
0: too low f0: too high
PWN
Input a PAL COLOR BAR pattern.
Short circuit between pin (17) of IC331 and ground.
Adjust CT332 to obtain color synchronization.
Remove the jumper wire from 1C331.
BELL FILTER Adjustment (LV301)
1.
.
Input a SECAM COLOR BAR pattern.
Connect an oscilloscope to the Q302 emitter.
Adjust LV301 so that waveform become: flat.
HAE =U
Before Adjustment After Adjustment
| SECAM DISCRI Adjustment (RV331 R-Y L331 B-Y)
Input a SECAM COLOR BAR pattern.
Connect an oscilloscope to pin (1) of IC201.
Adjust RV331 (R-Y) so that white and black parts of the waveform
of pin (1) becomes 0 level.
Connect an oscilloscope to pin (3) of IC201.
Adjust L331 (B-Y) so that white and black parts of the waveform
of pin (3) becomes 0 level.
th
(white and black levels
should become 0 level)
0 level
(white part) (black part)
(Before Adjustment) (After Adjustment)
— 18 —
. KV-M1400/M1401
RM-841
CIRCUIT ADJUSTMENTS
[ M1400U/M1401U/M1400L/M1400A/M1400E ]
4-3. ABOARD ADJUSTMENTS
H.FREQ Adjustment (RV502)
Input a PAL COLOR BAR signal. then connect an electrolytic
capacitor (100/16 V) between pin (28) and GND of IC502.
2. Adjust RV502 (H.FREQ) to stop scrolling of the picture in the
horizontal direction.
After adjustment. remove the electrolytic capacitor.
A BOARD 1.
RVO001 - Component side -
[cHR.POS| @
CT332 .
'e)
ES]
RV504
fO: suitable
f0: 15.625+50Hz
REF OSC 8.8 MHz Adjustment (CT332)
f0: too low f0: too high
®
RV503
® AGC ®
RV801 RV502
H.SIZE: H.FREQ
1C502 Input a PAL COLOR BAR pattem.
Short circuit between pin Hi of IC331 and ground.
Adjust CT332 to obtain color synchronization.
Remove the jumper wire from [C33].
RV505
®
rvso1 ©
CHARACTER POSITION Adjustment ee |
TU AGC Adjustment (RV503)
ee
| All Models }
Input a PAL COLOR BAR pattem.
Adjust RV0QJ to position the character display at
the point indicated by the arrow below.
iff
4-4. V BOARD ADJUSTMENT [m1s01 Models only ]
aha
1. Tune in an off air signal.
2. Adjust AGC VR (RV503) so thatsnow-noise and cross-modulation ,
just disappear from the picture.
RV504 H.CENT (HORIZONTAL CENTER)
(C-L-)
RV801 H.SIZE (HORIZONTAL SIZE)
EL -1o)
RV501 V.CENT (VERTICAL CENTER)
LIA
RV505 V.SIZE (VERTICAL SIZE)
| HO
V BOARD
~ Component side —
RVO1
RGB LEVEL] ©
RGB LEVEL Adjustment (RV01)
1. Set PICTURE to maximum.
2. Adjust RVOI till the RGB output becomes maxinur m.