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KV-20EXR20
RM-Y103
2) The following initial setting should always be per-
formed when replacing the IC 102 (PCD 8582).
EXTENT
1TEM
DATA
*Please
with
the
memory
each
items
by pressing
MUTING|— and then press|ENTER}.
5-2. CIRCUIT ADJUSTMENT
1) Input a color-bar signal.
2) Adjust AGC VR of IF 201 so that snow noise and
cross-modulation disappear from the picture.
3) Confirm them at every channel.
H.FREQUENCY ADJUSTMENT (HFRE)
1) Set to Service Mode.
2) Input a color-bar signal.
)
3) Connect a frequency counter to base of Q 502.
4) Select AFC with [I]and [4], set to level 3 (free run)
with Bland {6}.
5) Select HFRE with[l]and{4].
6) Adjut[3]and|6|to the 15.735 + 60 Hz level.
7) Select AFC with [IJand{4] again, set to level" 0 "with
Bland [6] ;
8) Write into the memory by pressing
>
then [ENTER].
1) Set the Service Mode.
2) Receive an off-air signal (VIDEO IN — no signal).
3) Connect the frequency counter across pin © of A-81
connector and ground.
4) Select VFRE with|l]and(4].
5) Adjust [3]and[6|to the 55 +1 Hz.
6) Write the memory by pressing
— then
[ENTER].
CHROMA TRAP ADJUSTMENT (C ROM)|
1) Set to Service Mode.
2) Input a color-bar signal.
3) Select NOTCH (VIDEO condition),
ing|+]. And then set the COLOR gain control to
maximum set-ting position and SHARPNESS control
turn ON by press-
to center.
4) Connect an oscilloscope to R OUT (TP 47 R) on C
board and ground.
5) Select
CROM with/lJand{4], and then adjust 3.58MHz
(CHROMA) ingredient is minimum with[3land{6].
6) Write into the memory by pressing
>
then [ENTER].
7) Set NOTCH to OFF, and make normal condition
with
— then [RESET].
[suB CONTRAST ADJUSTMENT (SPIX)
1) Set to Service Mode.
2) Input a color-bar signal. (75 IRE)
3) Set the conditions as follows.
COLOR.
MIN
R OFF
ON
G OFF
OFF
B OFF.
OFF
Press[VIDEO}
—
H (L) (It becomes minimum).
Select [3] (ON) and [6] (OFF) with[I]and{4].
1:0N
0: OFF
SERVICE ROFF 1
white
2. 140. lvp—p
black
4) Connect an oscilloscope to TP47R (R OUT) on C
board.
5) Adjust [3]and[6]to the 2.1 + 0.1Vp-p level by select-
ing SPIX with[l/and{4].
6) Write the memory by pressing IMUTING]
—
then
ENTER).
7) Return the following back to normal after adjustment.
G OFF
ON
B OFF...
ON
COLOR.....-.--- CENTER
—24—
PICTURE:
80%
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