Basic Adjustment - JVC AV-T2912/ZAR Service Manual

ADJUSTMENTS

BASIC ADJUSTMENT

Measuring
Item
instrument
Check of DC Voltmeter TP-91
B1 POWER
SUPPLY
IF VCO Signal
adjustment generator
Remote
control unit
VCO (CW)
TOO HIGH
ABOVE REFERENCE
BELOW REFERENCE
TOO LOW
SYNC :
FOCUS Signal
adjustment gener ator
Test point Ad justment item
(B1 con nector
1 p in)
TP-E( # )
(B1 con nector
3 pin )
CW TRANSF. (T111)
VCO (CW) mode
YELLOW
YES
EXIT BY
IT
EXIT
FOCUS VR
[In HVT]
1. Receive a black and white signal (color off). (NTSC)
2. Connect the DC voltmeter to B1 c onnector 1 pin (TP-91) and
TP-E(#) (B1 c onnector 3 pin).
3. Confirm that the voltage is DC129.5V
" Under normal conditions, no adjustment is required. And it must
not adjust without signal.
1. Receive the NTSC broadc ast.
2. Select the VCO(CW ) mode from the SERVICE MENU.
3. It c hecks that turn the CW TRANSF and the character of "TOO
HIGH" changes to yellow.
4. Next, it chec ks that turn the CW TRANSF on the c ontrary and
"TOO LOW" changes to yellow.
5. At this time, it checks that "SYNC" is "YES".
6. Turn the CW TRANSF and it is made for the character of
"BELOW REFERENCE" to bec ome yellow. Again, it checks
that "SYNC" is "YES".
1. Receive a crosshatch signal.
2. While looking at the sc reen, adjust FOCUS VR so that the
vertical and horizontal lines will be clear and fine in a detail.
3. Make sure that the picture is in focus even when the screen
gets darkened.
No. 51917
AV-T2922
Description
+2
V.
-2.5
19