Sony Trinitron KV-21V4A Service Manual page 31

PLL ADJUSTMENT ( ALL DESTINATIONS)
1. Input a 38.9MHz 100dBµ CW signal at the IF Out
injection point.
2. Connect a digital voltmeter to IC101 pin 23 .
3. Adjust T101 AFT for 2.5V ±0.3V dc.
TU AGC ADJUSTMENT (ALL DESTINATIONS)
1. Input a RF signal.
2. Adjust RF level of 64dbµV on E-54ch. (In case of System
B/G, other system is same ch.)
3. Select ch to E-54.
4. Adjust RV101 so that AGC voltage to 3.0 ± 0.3V.
DEFLECTION SYSTEM ADJUSTMENT
1. Enter into the service mode.
2. Using the "1" or "4" buttons select the Adjust item.
3. Press the "3" button to enter the adjustment
submenu.
4. Select and adjust each item in order to obtain the
optimum image.
Adjustment
V, SIZE
VER, BREATH
PAR, AMPL
PAR, TILT
V, LINEAR
CORN, CORR
V, POSITION
H, CENTRE
L SYSTEM ADJUSTMENT (B MODEL ONLY)
1. Input a 38.9MHz, 100dBµ CW signal at the IF out
injection point (SF101 pin 1 .)
2. Connect a digital voltmeter to IC101 pin 23 .
3. Adjust RV102 so that voltage to 3.0 V ± 0.3V dc.
Set Range
1A 00 - 3F
14 00 - 3F
00 00 - 3F
00 00 - 3F
28 00 - 3F
00 00 - 3F
32 2A (Fix)
29 00 - 3F
VERT, AMPL
V, LINEAR
V, CENTRE
H, CENTRE
H, SIZE
Too Small
Fit the link as required to obtain the correct horizontal picture
size. Remove the link if the H, SIZE is to large.
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CN804
4 3 2 1
Normal position