Sony DXF-701, Service Manual

Page: 10 / 36

3-2 (E) DXF-701 (UC)
DXF-701CE (CE)
3-2. VIEWFINDER SYSTEM
ADJUSTMENT
3-2-1. +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:
1
RV1 (VO-ADJ)/MAIN board
Specification: +9.5
±
0.05 Vdc
3-2-2. Heater Voltage Pre-Adjustment
Equipment: Digital voltmeter (AC mode)
Test point: TP5
⇔
TP6/MAIN board
Specification: 0.65
±
0.03 Vrms
Adjustment Procedure
If not met the specification, adjust
1
RV4(VH-ADJ)/
MAIN board.
TP1 TP3
TP4
TP5
TP6
TP7
TP2
TP12
R76
TP11
TP10
TP9 TP8
MAIN BOARD -SOLDERING SIDE-
3-2-3. Vertical Hold Adjustment
Note: Perform adjustment with removing R76
resistor on the MAIN board. After adjustment,
re-mount R76 resistor.
Equipment: Frequency counter
Preparation:
1
RV7 (V-SIZE)/MAIN board
→
Mechanical center
(If
1
RV7 (V-SIZE)/MAIN board is marked, not turn
1
RV7 (V SIZE)/MAIN board.)
Test point: TP 10/MAIN board
Adjusting point:
1
RV6 (V-HOLD)/MAIN board
Specification: NTSC : 48
±
0.5 Hz
PAL : 38
±
0.5 Hz
Adjustment Procedure
Adjust
1
RV6 (V-HOLD)/MAIN board so that the
specification is met while the viewfinder is free-run state
(Viewfinder is not input any video signal.) by pressing the
RET button of Lens.
RV1
(VO-ADJ)
CN7
CN1
CN8
CN6
CN3
CN5 CN4
CN2
RV4
(VH-ADJ)
RV3
(FOCUS)
RV7
(V-SIZE)
RV8
(V-LINE)
RV6
(V-HOLD)
RV5
(H-HOLD)
RV14
(OPAMP-ADJ)
RV15
(V-SIZE : WIDE)
(DXF-701WS/701WSCE only)
MAIN BOARD -COMPOMENT SIDE-
RV2
(H-SIZE)