Sony DXF-701 User manual

DXF-701
DXF-701CE
DXF-701WS
DXF-701WSCE
ELECTRONIC VIEWFINDER
SERVICE MANUAL
1st Edition (Revised 1)

X-RAY RADIATION WARNING
Be sure that parts replacement in the high voltage block
and adjustments made to the high voltage circuits are
carried out precisely in accordance with the procedures
given in this manual.
The material contained in this manual consists of
information that is the property of Sony Corporation and is
intended solely for use by the purchasers of the equipment
described in this manual.
Sony Corporation expressly prohibits the duplication of any
portion of this manual or the use thereof for any purpose
other than the operation or maintenance of the equipment
described in this manual without the express written
permission of Sony Corporation.
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DXF-701 (J, UC)
DXF-701CE (CE)
TABLE OF CONTENTS
1. OPERATING INSTRUCTION
2. SERVICE INFORMATION
2-1. BOARD LAYOUT.......................................... 2-1 (E)
2-2. REPLACEMENT OF MAIN PARTS............. 2-1 (E)
2-2-1. Notes on Replacement of MAIN Board ... 2-1 (E)
2-2-2. Replacement of CRT/DY Ass’y .............. 2-1 (E)
2-3. REPLACEMENT OF VF LOUPE.................. 2-2 (E)
2-4. REPLACEMENT OF OUTSIDE HOLDER T AND
EYEPIECE OUTER RING ............................. 2-3 (E)
3. ALIGNMENT
3-1. PREPARATION ............................................. 3-1 (E)
3-1-1. Equipment Required ................................ 3-1 (E)
3-1-2. Connection and lnitial Setting ................. 3-1 (E)
3-1-3. Notes on Adjustment ............................... 3-1 (E)
3-2. VIEWFINDER SYSTEM ADJUSTMENT .... 3-2 (E)
3-2-1. +9.5V Adjustment ................................... 3-2 (E)
3-2-2. Heater Voltage Pre-Adjustment .............. 3-2 (E)
3-2-3. Vertical Hold Adjustment........................ 3-2 (E)
3-2-4. Horizontal Hold Adjustment ................... 3-3 (E)
3-2-5. Focus Adjustment .................................... 3-3 (E)
3-2-6. Picture Frame Adjustment ....................... 3-4 (E)
3-2-7. Operational Amplifier Output
Adjustment .............................................. 3-5 (E)
3-2-8. Bright Calibration Adjustment ................ 3-5 (E)
3-2-9. Peaking Offset Adjustment...................... 3-6 (E)
3-2-10. Heater Voltage Adjustment ..................... 3-6 (E)
4. BLOCK DIAGRAM
5. SCHEMATIC DIAGRAM AND BOARD
LAYOUTS
MAIN BOARD ..................................................... 5-1
SUB BOARD ........................................................ 5-3
FRAME ................................................................. 5-5
6. SEMICONDUCTOR PIN ASSIGNMENTS
7. SPARE PARTS
7-1. NOTES ON REPAIR PARTS............................... 7-1
7-2. EXPLODED VIEWS ............................................ 7-2
7-3. ELECTRICAL PARTS LIST................................ 7-4
1 (E)

1-1 (E)
DXF-701 (UC)
DXF-701CE (CE)
SECTION 1
OPERATING INSTRUCTIONS This section is extracted
from operation manual.
•DXF-701/701CE
The DXF-701/701CE is an electronic (monochrome)
viewfinder which can be attached to a Sony CCD Color
Video Camera DXC-D30/D30P. For details of operation,
refer to the Operating Instructions for the camera.
Principal Specifications
Picture tube 1.5-inch monochrome
Indicators REC/TALLY, TAKE, BATT,
SHUTTER, GAIN UP
Resolution 600 TV lines
Signal system DXF-701: EIA standards
DXF-701CE: CCIR standards
Power supply 12 V DC
Power consumption 2.1 W
Mass 660 g approx. (1 lb 7 oz)
Maximum external dimensions
236 (W) ×85 (H) ×219 (D) mm
(9 3/8×3 3/8×8 5/8inches)
Accessories Operation Guide
Design and specifications are subject to change without
notice.
•DXF-701WS/701WSCE
The DXF-701WS/701WSCE is an electronic
(monochrome) viewfinder which can be attached to a Sony
CCD Color Video Camera DXC-D30/D30P/D30WS/
D30WSP. For details of operation, refer to the Operating
Instructions for the camera.
Principal Specifications
Picture tube 1.5-inch monochrome
Indicators REC/TALLY, TAKE, BATT,
SHUTTER, GAIN UP
Resolution 600 TV lines
Signal system DXF-701WS: EIA standards
DXF-701WSCE: CCIR standards
Power supply 12 V DC
Power consumption 2.1 W
Mass 660 g approx. (1 lb 7 oz)
Maximum external dimensions
236 (W) ×85 (H) ×219 (D) mm
(9 3/8×3 3/8×8 5/8inches)
Scan size 16:9/4:3
Accessories Operating Instructions
Design and specifications are subject to change without
notice.
http://getMANUAL.com

2-2 DXF-701 (UC)
DXF-701CE (CE)
SECTION 2
SERVICE INFORMATION
2-1. BOARD LAYOUT 2. Remove the slide ring as shown in Figure.
Remove two screws and remove the CRT/DY ASS’Y
from outside holders B and T.
MAIN board
SUB board LED(B) board
LED(A) board
2-2. REPLACEMENT OF MAIN PARTS
2-2-1. Notes on Replacement of MAIN Board
To replace the MAIN board, perform adjustment referring
to Section 3.“ALIGNMENT”.
2-2-2. Replacement of CRT/DY Ass'y
Note: If a deflection yoke is replaced, you should
replace assembly of CRT and deflection yoke
(CRT/DY ASS’Y).
1. Remove four screws as shown in Figure and remove
the bottom case.
Outside holder T
Outside holder B
CRT/DY Ass'y
Slide ring
Screws(BTP3 X12)
3. Untie two strings and remove an adhesive tape and
Cable Holder.
String
String
Cable holder
Adhesive tape
2-1 (E)
Screws(B3 X8) Screws(B3 X8)
Bottom case

2-3
DXF-701 (UC)
DXF-701CE (CE)
4. Disconnect four connectors CN2, 3, 4, 5 and 7 on the
MAIN board and high-tension cable. Disconnect the
CRT socket from the CRT/DY ASS’Y.
Note: In disconnecting, carefully pull the CRT socket
backward, as the pins of CRT/DY ASS’Y is
liable to bend.
5. When installing a new CRT/DY ASS’Y, reverse the
above procedures.
Note: In reconnecting the CRT socket, be sure to
match a projection of the CRT socket with a
mark of the CRT/DY ASS’Y.
CN2
CN3
MAIN board
CN5
CN4
High tension cable
CRT socket
CRT/DY Ass'y
CRT socket CRT/DY Ass'y
Projection Mark
2-3. REPLACEMENT OF VF LOUPE
1. Insert a minus screw driver to the clearance between
portion A and eyepiece outer ring as shown in Figure.
Remove eye cup by lifting its portion A and remove
eyepiece inner ring.
Note: When removing eyepiece inner ring, the
friction spring is liable to remove.
3. Remove one side of cutout portion as shown in Figure.
Pull out the lens holder (2) and remove the VF loupe.
Lens holder(2)
VF loupe
Convexity
Cutout
Eyecup
Friction spring
Eyepiece inner ring
Eyepiece outer ring
A
2. Hold the portion B as shown in Figure. Remove the
lens holder along the groove C.
B
B
C
C
C
Lens holder
2-2 (E)

2-4 DXF-701 (UC)
DXF-701CE (CE)
4. When installing the VF loupe, reverse the above
procedures.
Note: 11
11
1When installing the VF loupe, ensure the
direction of VF loupe. (Refer to Item 2-3-3.)
22
22
2When installing eyepiece inner ring, ensure
the inserting position of friction spring and
hold it by finger. Match boss of portion D
and insert the inner ring to the outer ring.
3. Remove a screw, washer and two hinge springs. Then,
remove the outside holder T and eypiece outer ring as
shown in Figure arrow.
•Optional VF loupe
There are two kind of VF loupes as optional accesory.
Use a VF loupe to match your visibility range.
VF loupe for aged eyes;
–2D to +1D (Sony part No. 3-725-276-01)
–0.5D to +3D (Sony part No. 3-176-501-01)
(For reference) Standard ; –3D to 0D
2-4. REPLACEMENT OF OUTSIDE
HOLDER T AND EYEPIECE OUTER
RING
1. Remove the Outside holder T referring to Section 2-2-
2. “Replacement of CRT/DY Ass’y”.
2. Push two pins to portion A by minus screw driver as
shown in Figure.
Outside holder T
Eyepiece outer ring
Hinge springs
4. Pull out two pins.
Pin
Pin
5. Replace outside holder T or eyepiece outer ring to new
one. Insert two pins to portion B by minus screw driver
as shown in Figure.
B
PinPin
Pin
B
D
D
B
Friction spring
Eyepiece inner ring
Friction spring
Eyepiece
inner ring
Minus screw driver
APin
Outside holder T
Pin
2-3 (E)

3-1 (E)
DXF-701 (UC)
DXF-701CE (CE)
SECTION 3
ALIGNMENT
3-1. PREPARATION
3-1-1. Equipment Required
1. Pattern box PTB-500
Sony part number J-6029-140-B
2. Resolution chart
Sony part number J-6026-100-A
3. White Window chart
4. Video camera DXC-D30/D30P (for DXF-701/701CE)
DXC-D30WS/D30WSP (for DXF-
701WS/701WSCE)
5. Camera Adaptor CA-537/537P, etc.
6. AC Adaptor CMA-8/8CE/8A/8ACE
7. Camera Cable CCQ-2BRS
8. B/W monitor PVM-91/91CE or equivalent
9. Oscilloscope
10.Waveform monitor
11.Digital voltmeter
12. Frequency counter
3-1-2. Connection and Initial setting
•Initial setting
1. Setting of Switches and Controls
Video Camera
OUTPUT switch/camera side →CAM/DCC OFF
GAIN switch/camera side →0 dB
Viewfinder DXF-701/701CE/701WS/701WSCE
CONTRAST control →Fully clockwise
BRIGHT control →Mechanical center
Lens
IRIS AUTO/MANU →AUTO
2. Preparation for picture
(1) Adjust the lens zoom so that the Resolution chart
frame coincides the underscanned picture frame on
the monitor.
(2) Adjust the iris control for the best resolution of the
monitor.
DXF-701/701CE
DXF-701WS/701WSCE
VTR/CCU/CMA
DXC-D30/D30P
DXC-D30WS/D30WSP
CA-537/537P, etc
2 3 meters
CCQ Camera cable
To an AC outlet
Black and White monitor
CAMERA/CCU
B.B cable
To VIDEO IN terminal
VIDEO OUT
CMA-8/8ACE
camera adapter
PTB-500
3-1-3. Notes on Adjustment
1. This “ALIGNMENT” is used for the adjustment of
DXF-701/701CE and DXF-701WS/701WSCE.
Therefore, when adjusting DXF-701/701CE, use the
video camera DXC-D30/D30P.
Also, in case of DXF-701WS/701WSCE, use the video
camera DXC-D30WS/D30WSP.
2. When adjusting DXF-701WS/701WSCE, set the DXC-
D30WS/D30WSP to “4:3” position. But, when
performing procedure 7 of “3-2-6. Picture Frame
Adjustment”, set the DXC-D30WS/D30WSP to “16:9”
position.
Therefore, regarding the setting manner of “16:9” or
“4:3”, refer to item of “Menu screen” of “2-7.
SERVICE MODE OPERATION” in the service
manual DXC-D30WS/D30WSP Vol.1, select the
ADVANCE menu “PAGE 9”, and set “16:9” or “4:3”.

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: 1RV1 (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 1RV4(VH-ADJ)/
MAIN board.
TP1 TP3
TP4
TP5
TP6
TP7
TP2
TP12
R76
TP11
TP10
TP9TP8
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:
1RV7 (V-SIZE)/MAIN board →Mechanical center
(If 1RV7 (V-SIZE)/MAIN board is marked, not turn
1RV7 (V SIZE)/MAIN board.)
Test point: TP 10/MAIN board
Adjusting point: 1RV6 (V-HOLD)/MAIN board
Specification: NTSC : 48 ±0.5 Hz
PAL : 38 ±0.5 Hz
Adjustment Procedure
Adjust 1RV6 (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
CN5CN4
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)