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AV-27920
m ADJUSTMENTS
B1 POWER SUPPLY
ICheckof
__| DC Voltmeter | TI
Voltmeter | TP-91 (B1)
.
Receive a monoscope pattern
~
|4. Receiveamonoscope patternsignal.
#8
|
; Connect the DC Voltmeter to TP-91 (B1) and TP-E(L).
TP-E({.L)
3. Confirm that the voltage is DC134V ay
ADJUSTMENT OF VIDEO / DEF. CIRCUIT
IF VCO
Signal
CW TRANSF. (1131)
1 1 . Receive a NTSC broadcast. (use channels without offset
adjustment
generator
frequency).
Select the VCO(CW) mode from the SERVICE MENU.
Confirm the color change (yellow) from
"TOO HIGH"
to
"TOO LOW"
by CW TRANSF. and
"SYNC : YES"
being
shown
on the screen.
Then,
adjust
CW
TRANSF.
until
"BELOW
REFERENCE"
mark turns yellow and confirm
TOO HIGH
again
" SYNC: YES"
being shown on the screen.
ABOVE REFERENCE
;
BELOW REFERENCE
YELLOW
TOO LOW
[VcO(CW)] MODE
SYNC
:
YES
RF. AGC
No.22 RF AGC
.
Receive a broadcast.
adjustment
Select "No.22 RF AGC' of the PICTURE MODE.
Press the MUTE key and turn off color.
With the MENU LEFT key, get noise in the screen picture. (0
side of setting value)
Press the MENU RIGHT key and stop when noise disappears
from the screen.
Change to other channels and make sure that there Is no
irregularity.
Press the MUTE key and get color out.
FOCUS
Receive a crosshatch signal.
adjustment
While looking at the screen, adjust FOCUS
VR so that the
vertical and horizontal lines will be clear and in fine detail.
Make sure that the picture is in focus even when the screen
gets darkened.
16
No.51370
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