Sony DXF-801 - Vertical Hold Adjustment

2-2. Viewfinder System Adjustment
2-2. Viewfinder System Adjustment
2-2-1. +9.5 V Adjustment
Note
* Perform the adjustment only when measured voltage is
more than +1 % with respect to the specified voltage.
* When this adjustment is carried out, all of following
adjustments must be confirmed.
Equipment : Digital voltmeter
Test point : TP1/MAIN board
Adjusting point : @RV1 (VO-ADJ)/MAIN board
Specification: +9.5+0.05 V dc
2-2-2. Heater Voltage Pre-Adjustment
Note
When this adjustment is carrie out, “2-2-4. Horizontal
Hold Adjustment”, “2-2-5. Focus Adjustment”, “2-2-6.
Picture Frame Adjustment” and “2-2-7. Operational
Amplifier Output Adjustment” must be confirmed.
Equipment :
Test point :
Specification :
Digital voltmeter (AC mode)
TPS <> TP6/MAIN board
0.65 +0.03 Vrms
Adjustment Procedure
If not met the specification, adjust @RV4 (VH-ADJ)/
MAIN board.
MAIN BOARD
RV1 RVI4
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~— COMPONENT SIDE -
2-2 (E)
2-2-3. Vertical Hold Adjustment
Note
Perform adjustment with removing R76 resistor on the
SUB board. After adjustment, re-mount R76 resistor.
Equipment : Frequency counter
Preparation
@RV7 (V-SIZE)/MAIN board — Mechanical center
(if @RV7 (V-SIZE)/MAIN board is marked, not turn
@RV7 (V SIZE)/MAIN board.)
Test point : TP 10/MAIN board
Adjusting point : @RV6 (V-HOLD)/SUB board
Specification: NTSC: 48 +0.5 Hz
PAL: 38+0.5 Hz
Adjustment Procedure
Adjust @RV6 (V-HOLD)/SUB board so that the specifica-
tion is met while the viewfinder is free-run state (View-
finder is not input any video signal.) by pressing the RET
button of Lens.
SUB BOARD
RV14
RV23 RVG
Q@ @@
RV5
MAIN BOARD
TP8 TP9
CN7 fete) @0
ee TP10 TP 1
———el
° ©
~ SOLDERIN; SIDE —
DXF-801/801CE