Sony TRINITRON KV-20S90 Service Manual page 6

V. SIZE ADJUSTMENT (VSIZ)
1. Input a crosshatch signal.
2. Activate the Service Adjustment Mode.
3. Select the VSIZ item with 1 and 4 .
4. Adjust value of VPOS with 1 and 4 for the best vertical center.
5. Press MUTING then ENTER to save into the memory.
V. CENTER ADJUSTMENT (VPOS)
1. Input a crosshatch signal.
2. Set to Service Adjustment Mode.
3. Select the VPOS item with 1 and 4 .
4. Adjust value of VPOS with 3 and 6 for the best vertical center.
5. Press MUTING then ENTER to save into the memory.
H. CENTER ADJUSTMENT (HPOS)
Perform this adjustment after performing H. Frequency.
1. Input a crosshatch signal.
2. Set to Service Adjustment Mode.
3. Select the HPOS item with 1 and 4 .
4. Adjust the value of HPOS with 3 and 6 for the best horizontal center.
5. Press MUTING then ENTER to save into the memory.
V. LINEARITY (VLIN), V. CORRECTION
1. Input a crosshatch signal.
2. V.Correction is automatically adjusted from the circuit and should
satisfy the conditions below.
V LINEARITY (VLIN)
V CORRECTION
SERVICE ADJUSTMENT MODE MEMORY
1. Change the value of the DCOL item to 1.
2. After completing all adjustments, press 0 then ENTER .
Read From Memory
Mode
SERVICE
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KV-20S90 / 21SE43C
Green
READ
0
Red
ENTER