AV-27220
    ADJUSTMENTS
B1 POWER SUPPLY
Measuring
ItemTest pointAdjustment partDescription
instrument
Check ofDC Voltmeter TP-91 (B1)1. Receive a black-and-white signal.
B1 POWER2. Connect the DC Voltmeter to TP-91 (B1) and TP-E("""").
TP-E("""")+2V
SUPPLY3. Confirm that the voltage is DC134V .
-2.5V
ADJUSTMENT OF VIDEO / DEF. CIRCUIT
Measuring
ItemTest pointAdjustment partDescription
instrument
IF VCOSignalCW TRANSF. (T131)" Under normal conditions, no adjustment is required.
adjustmentgenerator1. Receive a NTSC broadcast. (use channels without offset
[VCO(CW)] MODE
frequency).
2. Select the VCO(CW) mode from the SERVICE MENU.
3. Confirm the color change (yellow) from TOO HIGH to
TOO LOW by CW TRANSF. and SYNC : YES being
TOO HIGHshown on the screen. Then, adjust CW TRANSF. until
ABOVE REFERENCE
BELOW REFERENCE mark turns yellow and confirm
BELOW REFERENCEYELLOW
again SYNC : YES being shown on the screen.
TOO LOW
SYNC : YES
EXIT BY
EXITIT
RF. AGCNo.19 RF AGC1. Receive a broadcast.
adjustment2. Select ?No.19 RF AGC? of the PICTURE MODE.
3. Press the MUTING key and turn off color.
4. With the MENU LEFT key, get noise in the screen picture. (0
side of setting value)
5. Press the MENU RIGHT key and stop when noise disappears
from the screen.
6. Change to other channels and make sure that there is no
irregularity.
7. Press the MUTING key and get color out.
FOCUSSignalFOCUS VR1. Receive a crosshatch signal.
adjustmentgenerator[In HVT]2. While looking at the screen, adjust FOCUS VR so that the
vertical and horizontal lines will be clear and in fine detail.
3. Make sure that the picture is in focus even when the screen
gets darkened.
16No. 51784 |
ACEC
