Sony DXF-20W User manual

ELECTRONIC VIEWFINDER
DXF-20W
SERVICE MANUAL
1st Edition

DXF-20W
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.
!WARNING
This manual is intended for qualified service personnel only.
To reduce the risk of electric shock, fire or injury, do not perform any servicing other than that
contained in the operating instructions unless you are qualified to do so. Refer all servicing to
qualified service personnel.
!WARNUNG
Die Anleitung ist nur für qualifiziertes Fachpersonal bestimmt.
Alle Wartungsarbeiten dürfen nur von qualifiziertem Fachpersonal ausgeführt werden. Um die
Gefahr eines elektrischen Schlages, Feuergefahr und Verletzungen zu vermeiden, sind bei
Wartungsarbeiten strikt die Angaben in der Anleitung zu befolgen. Andere als die angegeben
Wartungsarbeiten dürfen nur von Personen ausgeführt werden, die eine spezielle Befähigung
dazu besitzen.
!AVERTISSEMENT
Ce manual est destiné uniquement aux personnes compétentes en charge de l’entretien. Afin
de réduire les risques de décharge électrique, d’incendie ou de blessure n’effectuer que les
réparations indiquées dans le mode d’emploi à moins d’être qualifié pour en effectuer d’autres.
Pour toute réparation faire appel à une personne compétente uniquement.

1 (E)
DXF-20W
Table of Contents
3. Spare Parts
3-1. Exploded Views .............................................................. 3-1
3-2. Electrical Parts List ......................................................... 3-3
3-3. Supplied Accessories ...................................................... 3-3
3-4. Optional Fixtures ............................................................ 3-3
4. Block Diagram
Overall ............................................................................ 4-1
5. Schematic Diagrams
DF-70 .............................................................................. 5-1
VA-229 ........................................................................... 5-2
LE-326 ............................................................................ 5-3
VF-88 .............................................................................. 5-3
6. Board Layouts
DF-70 .............................................................................. 6-1
VA-229 ........................................................................... 6-1
VF-88 .............................................................................. 6-2
Manual Structure
Purpose of this manual ........................................................... 2 (E)
Relative manual ...................................................................... 2 (E)
1. Service Overview
1-1. Location of Printed Circuit Boards .......................... 1-1 (E)
1-2. Recommended Replacement Parts .......................... 1-1 (E)
1-3. Connector Input/Output Signals .............................. 1-1 (E)
1-4. Cleaning ................................................................... 1-2 (E)
1-4-1. Cleaning of Viewfinder .................................. 1-2 (E)
1-4-2. Cares after Using under Special
Environment ................................................... 1-2 (E)
1-5. Replacing CRT/DY Assembly ................................ 1-3 (E)
1-6. Arranging Harness ................................................... 1-4 (E)
1-7. Disconnecting/Connecting Flexible Card Wire ....... 1-5 (E)
1-8. Notes on Spare Parts ................................................ 1-6 (E)
1-9. Unleaded Solder ....................................................... 1-6 (E)
2. Alignment
2-1. Preparation ............................................................... 2-1 (E)
2-1-1. Connecting Diagram ...................................... 2-1 (E)
2-1-2. Required Equipment ....................................... 2-1 (E)
2-1-3. Notes on Adjustment ...................................... 2-1 (E)
2-1-4. Initial Setting .................................................. 2-1 (E)
2-2. Viewfinder System Adjustment ............................... 2-2 (E)
2-2-1. Heater Voltage Pre-Adjustment ..................... 2-2 (E)
2-2-2. Focus Adjustment ........................................... 2-2 (E)
2-2-3. Horizontal Frame Adjustment ........................ 2-3 (E)
2-2-4. Heater Voltage Adjustment ............................ 2-4 (E)
2-2-5. Bright Calibration Adjustment ....................... 2-4 (E)
2-2-6. Horizontal Shift Adjustment (For NTSC) ...... 2-5 (E)
2-2-6. Horizontal Shift Adjustment (For PAL) ......... 2-6 (E)
2-2-7. Vertical Frame Adjustment (For NTSC) ........ 2-7 (E)
2-2-7. Vertical Frame Adjustment (For PAL) .......... 2-8 (E)
2-2-8. Screen Centering Check ................................. 2-9 (E)
2-2-9. Vertical Linearity Adjustment ........................ 2-9 (E)

2 (E) DXF-20W
Purpose of this manual
This manual is the service manual for Electronic Viewfinder DXF-20W.
This manual describes the information items necessary when the unit is supplied and
installed, items on maintenance, and items that premise the service based on the
components parts such as alignment, schematic diagrams, board layouts and spare
parts list, assuming use of system and service engineers.
Relative manual
Besides this service manual the following manual is available for this unit.
• Operating Instructions (Supplied with this unit)
This manual is necessary for application and operation of this unit.
Part number: 3-991-782-XX
Manual Structure

1-1 (E)
DXF-20W
Section 1
Service Overview
1-1. Location of Printed Circuit Boards
1-2. Recommended Replacement Parts
Parts listed below are recommended replacement parts.
They are subject to cracks with the lapse of time. Check
sometimes by visual, and replace as necessary.
Name Sony Part No.
Gel, MIC 3-854-132-0X *
EYE CUP KIT (RP) A-8319-943-B
*1 It is recommended that the MIC gels are replaced in
pairs. In this case, please order two pieces.
1-3. Connector Input/Output Signals
VF (20P MALE)
(External view)
Pin No. Signal I/O Specifications
1 PEAKING CONT IN Zi >5 kZ
2 EXT. DC (12 V) OUT 10.6 V to 17.0 V dc
3 REC TALLY OUT Zo <500 Z
4 BATT ALARM OUT Zo <1.1 kZ
5 NC IN ON : 0 ±0.5 V
6 VF VIDEO (X) OUT V = 1.0 V p-p
7 EXT. DC (12 V) OUT 10.6 V to 17.0 V dc
8NC
9NC
10 SERIAL DATA OUT Zo <500 Z, 5 V p-p
11 VF VIDEO (G) OUT GND for VF VIDEO
12 EXT. DC (GND) GND for +12 V dc
13 NC
14 DISP ON/OFF IN
15 SERIAL CLOCK OUT Zo <500 Z, 5 V p-p
16 R-Y OUT V = 830 mV
17 EXT. DC (GND) GND for +12 V dc
18 B-Y OUT V = 830 mV
19 SYNC OUT V = 5 V p-p
20 SERIAL LOAD OUT Zo <500 Z, 5 V p-p
This unit normally operates with the above input signals.
LE-326
VF-88
VA-229
DF-70
Gel, MIC
Eye cup
1
6
11
16
5
10
15
20

1-2 (E) DXF-20W
Hold ring
VF tube sub
assembly
Align red lines
MC protector
Filter holder
Eyecup
1-4. Cleaning
1-4-1. Cleaning of Viewfinder
By extracting VF tube sub assembly, lens and MC protec-
tor can be easily cleaned. And also dust on the CRT
surface or mirror can be easily cleaned off.
1. Turn the hold ring counterclockwise and extract the
VF tube sub assembly.
2. Detach the eyecup.
3. Remove the MC protector with the filter holder.
4. Clean the lens and MC protector with a commercially
available camera lens cleaner. Blow off dust with a
blower carefully so as not to flaw the mirror.
5. After the cleaning is completed, install by reversing
the preceding steps. Align red lines of the VF tube and
VF tube sub assembly when inserting, and turn the
hold ring clockwise until it locks.
n
.Do not use any type of solvent, such as alcohol, benzine
or thinner to remove stains.
.Be sure to attach the eyecup to the VF, or the MC
protector may come off.
.To protect the viewfinder lens from drops, put the MC
protector in the filter holder and attach the eyecup
securely.
1-4-2. Cares after Using under Special
Environment
It is recommended to check the following items after
gathering the news at seaside, dusty area or spa.
1. Clean off sand and dust in the unit carefully.
2. Do not allow salt in seawater or sulfur in spa to contact
the not-painted surface of the cabinet. They may cause
corrosion in white. Clean with alcohol immediately if
contacted.
3. Clean the connection surface of connectors.
4. Carry out the common operation check.

1-3 (E)
DXF-20W
PTP2.6 x 8
CRT/DY assembly
Lug
VF tube
assembly
PTP2.6 x 8
PTP2 x 6
8. Remove the three screws (two : PTP2.6 x8, one :
PTP2 x6), and remove the CRT/DY assembly from
the VF tube assembly. Replace the CRT/DY assembly.
9. Install a new CRT/DY assembly to the VF tube
assembly so that the high-voltage cable comes upper.
10. Connect the high-voltage cable and harnesses by
reversing steps 6 and 7.
11. Arrange the harnesses referring to Section 1-6.
12. Perform electrical alignment referring to Section 2
“Electrical Alignment”.
13. Reinstall the upper chassis by reversing steps 2 and 3.
n
Be careful so that the harnesses are not caught by the
upper chassis.
14. Close the MIC clamp and tighten the MIC clamp
screw.
1-5. Replacing CRT/DY Assembly
1. Loosen the MIC clamp screw to open the MIC clamp.
2. Remove the two screws (K2.6 x5).
3. Remove the three hexagon cap screws (2.6 x6) to
detach the upper chassis.
4. Remove the two screws (P2 x3.5) and remove the PC
board plate.
n
When attaching the PC board plate, be careful of its
orientation (A in the figure above).
5. Cut the binding yarn of the high-voltage cable.
6. Disconnect the high-voltage cable connector.
7. Disconnect the harnesses from the connectors CN4,
CN5, and CN6 on the VF-88 board.
VF-88 board
CRT/DY assembly
High-voltage
cable connector
Harnesses
Binding
yarn
CN4
CN5
CN6
K2.6 x5
P2 x3.5
P2 x3.5
Upper chassis
MIC clamp
PC board plate
A
Hexagon cap screw
Hexagon cap screws

1-4 (E) DXF-20W
D
C
B
VF cable
High-voltage cable
8-wire harness
1-6. Arranging Harness
When repairing the unit, arrange and clamp the harness as
described in the following steps.
Improper arrangement of the harness may result in a
disconnection or awkward turn of the VF tube assembly.
1. Arrange the 8-wire harness as shown in the figure and
clamp it at point A so that it is not in contact with the
inside of the VF tube assembly or the lower chassis.
A
VF tube
assembly
8-wire harness
Lower chassis
2. Clamp the high-voltage cable and the 8-wire harness at
point B.
3. Clamp the 8-wire harness at point C.
4. Arrange the high-voltage cable as shown in the figure,
and then clamp it with the VF cable at point D.

1-5 (E)
DXF-20W
5. Arrange the 5-wire DY lead as shown in the figure,
and then clamp it at point E.
6. Clamp the 4-wire CRT cable at point F.
7. Fix the CRT connector with UL tape as shown in the
figure, and then clamp the CRT cable at point G.
n
Ensure that the CRT connector is connected firmly.
8. Install the upper chassis.
Be careful so that the high-voltage cable is not caught.
1-7. Disconnecting/Connecting Flexible
Card Wire
The flexible card wire is used between the VF-88 board
and VA-229 board. Take care not to break this flexible
card wire. This shortens the wire life.
Disconnecting
1. Turn off the power.
2. Slide portions A in the direction of the arrows to
unlock and pull out the flexible card wire.
Connecting
n
.Be careful not to insert the flexible card wire obliquely.
.Check that the conductive surface of the flexible card
wire is not soiled with dust.
1. Slide portions A in the direction of the arrows and
insert the flexible card wire as far as it will go with the
conductive surface downside.
2. Slide portions A in the reverse direction to lock.
A
Conductive
surface
A
G
F
E
Tape
4-wire CRT cable
5-wire DY lead
High-voltage cable

1-6 (E) DXF-20W
1-8. Notes on Spare Parts
1. Safety Related Components Warning
Components marked !are critical to safe operation.
Therefore, specified parts should be used in the case of
replacement.
2. Standardization of Parts
Some spare parts supplied by Sony differ from those
used for the unit. These are because of parts common-
ality and improvement.
Parts list has the present standardized repair parts.
3. Stock of Parts
Parts marked with “o” at SP(Supply Code) column of
the spare parts list may be not stocked. Therefore, the
delivery date will be delayed.
4. Harness
Harnesses with no part number are not registered as
spare parts.
1-9. Unleaded Solder
Boards requiring use of unleaded solder are printed with a
lead free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come
printed with the lead free mark due to their particular size.)
: LEAD FREE MARK
m
.Be sure to use the unleaded solder for the printed circuit
board printed with the lead free mark.
.The unleaded solder melts at a temperature about 40 dC
higher than the ordinary solder, therefore, it is recom-
mended to use the soldering iron having a temperature
regulator.
.The ordinary soldering iron can be used but the iron tip
has to be applied to the solder joint for a slightly longer
time. The printed pattern (copper foil) may peel away if
the heated tip is applied for too long, so be careful.

2-1 (E)
DXF-20W
DXF-20WPDW-F330/F350
AC-DN10
PTB-500
VIDEO OUT (Left side)
(PDW-F350)
VIDEO OUT
(Rear)
(PDW-F330)
2 to 3 m
PIX
MONITOR
OUT
WFM
B/W monitor
To VIDEO IN
To VIDEO
IN
BNC
cable
BNC cable
Section 2
Alignment
2-1. Preparation
2-1-1. Connecting Diagram
Using a video camera
Using a camcorder
Related equipment
.Video camera: DXC-D50WS/D50WSP
.Professional disk PDW-F330/F350
camcorder:
.Camera adaptor: CA-D50/D50P
.AC adaptor: CMA-8/8CE/8A/8ACE, AC-DN10
.Camera cable: CCZ-A2
.B/W monitor: PVM-91/91CE or equivalent
2-1-2. Required Equipment
Tools/measuring equipment
.Pattern box PTB-500 (Sony part number: J-6029-140-B)
. Resolution chart (4:3) (Sony part number: J-6026-100-A)
. Resolution chart (16:9) (Sony part number: J-6395-320-A)
.Waveform monitor (WFM)
.Digital voltmeter
2-1-3. Notes on Adjustment
.When using the camera or camcorder that can select the
aspect ratio 16:9 or 4:3, on some adjustment items, the
setting of the aspect ratio needs to be changed.
(Refer to Section 2-2-5, Bright Calibration Adjustment.)
.When the aspect ratio is not specified, perform adjust-
ment in the 16:9 mode. As for details on the setting
method of the aspect ratio, refer to the operating instruc-
tions of the video camera or camcorder to be used.
.This alignment is described for both NTSC/PAL sys-
tems. When performing the adjustment, adjust according
to the level appropriate for each system.
2-1-4. Initial Setting
Video camera or digital camcorder
.Lens: IRIS A (auto)/M (manual) →M (manual)
.OUTPUT/DCC switch →CAM/ON
.GAIN switch →0 dB
.Selection of 16:9 mode
n
When using DXC-D50WS/D50WSP
.Change on the OTHERS page in the MAINTE-
NANCE menu.
When using PDW-F350/F330
.Change on the FORMAT page in the USER (or
OPERATION) menu.
n
Only when using the camera and camcorder that can
select the aspect ratio 16:9 or 4:3, the mode selection is
required.
Setting of viewfinder
.CONTRAST control →Mechanical center
.BRIGHT control →Mechanical center
.PEAKING control →Fully counterclockwise 3
DXF-20W PTB-500
WFM
B/W monitor
CCU/VTR/CMA
CA-D50/D50P +DXC-D50WS/D50WSP
2 to 3 m
Camera cable
CCZ-A2
To an AC outletTo CAMERA/CCU
BNC cable
BNC
cable
To VIDEO IN
PIX
MONITOR OUT
To VIDEO
IN
To VIDEO OUT
CMA-8/8A
AC adaptor

2-2 (E) DXF-20W
2-2. Viewfinder System Adjustment
2-2-1. Heater Voltage Pre-Adjustment
Note
When performing this adjustment, check “2-2-5. Bright
Calibration Adjustment”.
Preparation
.Measuring equipment: Digital voltmeter (AC mode)
Adjustment procedure
Check the following voltage.
.Test point: TP3 ↔TP4/VF-88 board
.Specification: 0.635 ±0.015 V rms
If the above specification is not met, adjust 1RV4 (VH-
ADJ)/VF-88 board so that the specification is met.
2-2-2. Focus Adjustment
Note
This adjustment and “2-2-3. Horizontal Frame Adjust-
ment”, “2-2-4. Heater Voltage Adjustment”and “2-2-5.
Bright Calibration Adjustment”affect with each other.
Therefore, repeat the adjustment until all specifications are
met.
Preparation
.Object: Resolution chart
.Measuring equipment: Waveform monitor
.Lens
IRIS AUTO/MANU →MANU
.Viewfinder
BRIGHT control →Mechanical center
CONTRAST control →Fully clockwise 2
PEAKING control →Fully counterclockwise 3
Adjustment Procedure
1. Adjust the lens zoom so that the resolution chart
frame coincides with the underscanned picture frame
on the monitor screen.
2. Set the resolution on the monitor screen to the best
state with the lens focus.
Monitor screen
3. Adjust the lens iris so that the white level at VIDEO
OUT connector on the camera is as follows.
For NTSC: 100 ±2 IRE
For PAL: 700 ±14 mV
4. Adjust 1RV3 (FOCUS)/VF-88 board so that the
picture on the viewfinder screen is best focused.
TP4
RV4
TP3
RV3
RV2
RV1
VF-88 board
VF-88 board

2-3 (E)
DXF-20W
2 mm (H size)
Chart frame
Underscan monitor frame
2-2-3. Horizontal Frame Adjustment
Note
This adjustment and “2-2-2. Focus Adjustment”, “2-2-4.
Heater Voltage Adjustment”and “2-2-5. Bright Calibration
Adjustment”affect with each other. Therefore, repeat the
adjustment until all specifications are met.
Preparation
.Object: Resolution chart
.Measuring equipment: Waveform monitor
.Remove the eye cap from the viewfinder.
.Viewfinder
BRIGHT control →Mechanical center
CONTRAST control →Mechanical center
PEAKING control →Fully counterclockwise 3
Adjustment Procedure
1. Adjust the lens zoom so that the resolution chart
frame coincides with the underscanned picture frame
on the monitor screen.
2. Set the resolution on the monitor screen to the best
state with the lens focus.
3. Adjust the lens iris so that the white level at VIDEO
OUT connector on the camera is as follows.
For NTSC: 100 ±2 IRE
For PAL: 700 ±14mV
Monitor screen
4. Adjust 1RV2 (H-SIZE WIDE)/VF-88 board so that H
size of resolution chart is underscanned by approxi-
mately 2 mm from the CRT picture frame.
Viewfinder screen
RV4
RV3
RV2
RV1
VF-88 board

2-4 (E) DXF-20W
2-2-5. Bright Calibration Adjustment
Note
This adjustment and “2-2-2. Focus Adjustment”, “2-2-3.
Horizontal Frame Adjustment”and “2-2-4. Heater Voltage
Adjustment”affect with each other. Therefore, repeat the
adjustment until all specifications are met.
Preparation
.Viewfinder
BRIGHT control →Mechanical center
CONTRAST control →Mechanical center
Adjustment Procedure
Change the setting of aspect ratio to 4:3 mode.
Adjust the bright calibration so that the pedestal level
becomes the surrounding black level by turning 1RV204
(SUS-BRIGHT: 4:3) / the VA-229 board clockwise from
the counterclockwise maximum point.
Set the aspect ratio to 16:9 mode again.
Adjust 1RV206 (SUS-BRIGHT: 16:9) / the VA-229 board
in the same way as the 4:3 mode.
2-2-4. Heater Voltage Adjustment
Note
When performing this adjustment, check “2-2-5. Bright
Calibration Adjustment”.
Preparation
.Measuring equipment: Digital voltmeter (AC mode)
Adjustment procedure
Check the following voltage.
.Test point: TP3 ↔TP4/VF-88 board
.Specification: 0.635 ±0.015 V rms
If the above specification is not met, adjust 1RV4 (VH-
ADJ)/VF-88 board so that the specification is met.
VF-88 board
VF-88 board
TP4
RV4
TP3
RV3
RV2
RV1
RV204 RV206
VA-229 board

2-5 (E)
DXF-20W
2-2-6. Horizontal Shift Adjustment (For
NTSC)
m
.The following is the adjustment of the NTSC system
video camera and viewfinder.
.When adjusting the viewfinder used in the PAL system
video camera, perform the “Adjustment procedure (For
PAL)”.
Preparation
.Measuring equipment: Waveform monitor
.Viewfinder
BRIGHT control →Fully clockwise 2
CONTRAST control →Fully counterclockwise 3
PEAKING control →Fully counterclockwise 3
Adjustment procedure
1. Attach the viewfinder to the NTSC system video
camera.
2. Adjust the lens zoom so that the resolution chart frame
coincides with the underscanned picture frame on the
monitor screen.
3. Set the resolution on the monitor screen to the best
state with the lens focus.
4. Adjust the lens iris so that white level at VIDEO OUT
connector on the camera is 100 ±2 IRE.
5. Adjust the BRIGHT control fully clockwise and the
CONTRAST control fully counterclockwise to display
the pedestal portion.
6. Adjust 1RV101 (H-SHIFT: N)/DF-70 board so that the
pedestal portion on both sides are equal.
Viewfinder screen
Adjustment procedure (For PAL)
1. Attach the viewfinder to the PAL system video
camera.
2. Adjust the lens zoom so that the resolution chart frame
coincides with the underscanned picture frame on the
monitor screen.
3. Set the resolution on the monitor screen to the best
state with the lens focus.
4. Adjust the lens iris so that white level at VIDEO OUT
connector on the camera is 700 ±14 mV.
5. Adjust the BRIGHT control fully clockwise and the
CONTRAST control fully counterclockwise to display
the pedestal portion.
6. Adjust 1RV102 (H-SHIFT: P)/DF-70 board so that the
pedestal portion on both sides are equal.
Viewfinder screen
Pedestal portion on both sides
are equal.
Pedestal portion on both sides
are equal.
DF-70 board
RV101 RV102 RV103 RV104 RV105

2-6 (E) DXF-20W
2-2-6. Horizontal Shift Adjustment (For PAL)
m
.The following is the adjustment of the PAL system video
camera and viewfinder.
.When adjusting the viewfinder used in the NTSC system
video camera, perform the “Adjustment procedure (For
NTSC)”.
Preparation
.Measuring equipment: Waveform monitor
.Viewfinder
BRIGHT control →Fully clockwise 2
CONTRAST control →Fully counterclockwise 3
PEAKING control →Fully counterclockwise 3
Adjustment procedure
1. Attach the viewfinder to the PAL system video
camera.
2. Adjust the lens zoom so that the resolution chart frame
coincides with the underscanned picture frame on the
monitor screen.
3. Set the resolution on the monitor screen to the best
state with the lens focus.
4. Adjust the lens iris so that white level at VIDEO OUT
connector on the camera is 700 ±14 mV.
5. Adjust the BRIGHT control fully clockwise and the
CONTRAST control fully counterclockwise to display
the pedestal portion.
6. Adjust 1RV102 (H-SHIFT: P)/DF-70 board so that the
pedestal portion on both sides are equal.
Viewfinder screen
Adjustment procedure (For NTSC)
1. Attach the viewfinder to the NTSC system video
camera.
2. Adjust the lens zoom so that the resolution chart frame
coincides with the underscanned picture frame on the
monitor screen.
3. Set the resolution on the monitor screen to the best
state with the lens focus.
4. Adjust the lens iris so that white level at VIDEO OUT
connector on the camera is 100 ±2 IRE.
5. Adjust the BRIGHT control fully clockwise and the
CONTRAST control fully counterclockwise to display
the pedestal portion.
6. Adjust 1RV101 (H-SHIFT: N)/DF-70 board so that the
pedestal portion on both sides are equal.
Viewfinder screen
Pedestal portion on both sides
are equal.
Pedestal portion on both sides
are equal.
DF-70 board
RV101 RV102 RV103 RV104 RV105

2-7 (E)
DXF-20W
2-2-7. Vertical Frame Adjustment (For NTSC)
m
.The following is the adjustment of the NTSC system
video camera and viewfinder.
.When adjusting the viewfinder used in the PAL system
video camera, perform the “Adjustment procedure (For
PAL)”.
Preparation
.Measuring equipment: Waveform monitor
.Remove the eye cap from the viewfinder.
.Viewfinder
BRIGHT control →Mechanical center
CONTRAST control →Mechanical center
PEAKING control →Fully counterclockwise 3
Adjustment procedure
1. Attach the viewfinder to the NTSC system video
camera.
2. Adjust the lens zoom so that the resolution chart frame
coincides with the underscanned picture frame on the
monitor screen.
3. Set the resolution on the monitor screen to the best
state with the lens focus.
4. Adjust the lens iris so that white level at VIDEO OUT
connector on the camera is 100 ±2 IRE.
5. Adjust 1RV103 (V-SIZE: N)/DF-70 board so that the
V size of resolution chart is underscanned by approxi-
mately 2 mm from the CRT picture frame.
Viewfinder screen
Adjustment procedure (For PAL)
1. Attach the viewfinder to the PAL system video
camera.
2. Adjust the lens zoom so that the resolution chart frame
coincides with the underscanned picture frame on the
monitor screen.
3. Set the resolution on the monitor screen to the best
state with the lens focus.
4. Adjust the lens iris so that white level at VIDEO OUT
connector on the camera is 700 ±14 mV.
5. Adjust 1RV104 (V-SIZE: P)/DF-70 board so that the
V size of resolution chart is underscanned by approxi-
mately 2 mm from the CRT picture frame.
(When 1RV103 is not adjusted, the adjustment may
not be performed by just 1RV104. In such case, adjust
1RV104 after roughly adjusting by 1RV103.)
Viewfinder screen
RV101 RV102 RV103 RV104 RV105
DF-70 board
Approx. 2 mm (V size)
Chart frame
CRT frame
Approx. 2 mm (V size)
Chart frame
CRT frame

2-8 (E) DXF-20W
2-2-7. Vertical Frame Adjustment (For PAL)
m
.The following is the adjustment of the PAL system video
camera and viewfinder.
.When adjusting the viewfinder used in the NTSC system
video camera, perform the “Adjustment procedure (For
NTSC)”. After the “Adjustment procedure (For NTSC)”,
perform the check or adjustment of the PAL system
again.
Preparation
.Measuring equipment: Waveform monitor
.Remove the eye cap from the viewfinder.
.Viewfinder
BRIGHT control →Mechanical center
CONTRAST control →Mechanical center
PEAKING control →Fully counterclockwise 3
Adjustment procedure
1. Attach the viewfinder to the PAL system video
camera.
2. Adjust the lens zoom so that the resolution chart frame
coincides with the underscanned picture frame on the
monitor screen.
3. Set the resolution on the monitor screen to the best
state with the lens focus.
4. Adjust the lens iris so that white level at VIDEO OUT
connector on the camera is 700 ±14 mV.
5. Adjust 1RV104 (V-SIZE: P)/DF-70 board so that the
V size of resolution chart is underscanned by approxi-
mately 2 mm from the CRT picture frame.
(When 1RV104 is not adjusted, the adjustment may
not be performed by just 1RV103. In such case, adjust
1RV103 after roughly adjusting by 1RV104.)
Viewfinder screen
Adjustment procedure (For NTSC)
1. Attach the viewfinder to the NTSC system video
camera.
2. Adjust the lens zoom so that the resolution chart frame
coincides with the underscanned picture frame on the
monitor screen.
3. Set the resolution on the monitor screen to the best
state with the lens focus.
4. Adjust the lens iris so that white level at VIDEO OUT
connector on the camera is 100 ±2 IRE.
5. Adjust 1RV103 (V-SIZE: N)/DF-70 board so that the
V size of resolution chart is underscanned by approxi-
mately 2 mm from the CRT picture frame.
Viewfinder screen
DF-70 board
Approx. 2 mm (V size)
Chart frame
CRT frame
Approx. 2 mm (V size)
Chart frame
CRT frame
RV101 RV102 RV103 RV104 RV105

2-9 (E)
DXF-20W
Centering magnet
Top chassis
VF tube
2-2-9. Vertical Linearity Adjustment
Preparation
.Measuring equipment: Waveform monitor
.Viewfinder
BRIGHT control →Mechanical center
CONTRAST control →Mechanical center
PEAKING control →Fully counterclockwise 3
Adjustment procedure
1. Adjust the lens zoom so that the resolution chart frame
coincides with the underscanned picture frame on the
monitor screen.
2. Set the resolution on the monitor screen to the best
state with the lens focus.
3. Adjust the lens iris so that the white level at VIDEO
OUT connector on the camera is as follows.
For NTSC: 100 ±2 IRE
For PAL: 700 ±14 mV
4. Adjust 1RV105 (V-LIN)/DF-70 board so that each
circle at the four corners of resolution chart is the
perfect circle (symmetrical in top and bottom).
2-2-8. Screen Centering Check
Note
When performing the centering magnet adjustment in the
check of this section, perform “2-2-3. Horizontal Frame
Adjustment”and “2-2-7. Vertical Frame Adjustment”.
Preparation
.Measuring equipment: Waveform monitor
.Viewfinder
BRIGHT control →Mechanical center
CONTRAST control →Mechanical center
PEAKING control →Fully counterclockwise 3
Adjustment procedure
1. Adjust the lens zoom so that the resolution chart frame
coincides with the underscanned picture frame on the
monitor screen.
2. Set the resolution on the monitor screen to the best
state with the lens focus.
3. Adjust the lens iris so that the white level at VIDEO
OUT connector on the camera is as follows.
For NTSC: 100 ±2 IRE
For PAL: 700 ±14 mV
4. Push the VF tube against the top chassis on the
horizontal position as shown in the illustration below.
Check that the image is in the center when it is viewed
through the viewfinder in the normal state.
If the image is not in the center, perform the centering
magnet adjustment to adjust the image to the center.
RV101 RV102 RV103 RV104 RV105
DF-70 board