Sony HDVF-20A User Manual
HD ELECTRONIC VIEWFINDER
HDVF-20A
MAINTENANCE MANUAL
1st Edition
Serial No. 10001 and Higher
! 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.
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.
HDVF-20A
Table of Contents
Manual Structure
Purpose of this manual ........................................................................................ 3 (E)
Relative manual ................................................................................................... 3 (E)
Contents ............................................................................................................... 4 (E)
1. Service Overview
1-1. Location of Printed Circuit Boards .......................................................1-1 (E)
1-2. Connector Input/Output Signals............................................................1-1 (E)
1-3. Replacing CRT......................................................................................1-2 (E)
1-4. Disconnecting/Connecting Flexible Card Wire ....................................1-3 (E)
1-5. Notes on Repair Parts............................................................................1-3 (E)
1-6. Circuit Description ................................................................................1-4 (E)
2. Electrical Alignment
2-1. General Information for Electrical Adjustment ....................................2-1 (E)
2-1-1. Notes on Adjustment............................................................2-1 (E)
2-1-2. Equipment/Fixtures Required ..............................................2-1 (E)
2-1-3. Connection ...........................................................................2-1 (E)
2-1-4. Extending Viewfinder ..........................................................2-2 (E)
2-1-5. Setting of the VF SCAN Mode ............................................2-2 (E)
2-1-6. Setting of the Format............................................................2-2 (E)
2-2. Power Supply Voltage Adjustment.......................................................2-3 (E)
2-3. Vertical Hold Adjustment .....................................................................2-3 (E)
2-4. Horizontal Hold Adjustment .................................................................2-3 (E)
2-5. Horizontal Duty Adjustment .................................................................2-4 (E)
2-6. Heater Voltage Adjustment...................................................................2-4 (E)
2-7. Focus Adjustment..................................................................................2-5 (E)
2-8. Picture Frame Adjustment.....................................................................2-6 (E)
2-9. Bright Extent Adjustment .....................................................................2-7 (E)
2-10. Horizontal Picture Positioning Adjustment ..........................................2-8 (E)
2-11. Peaking Level Adjustment ....................................................................2-9 (E)
2-12. Clamping Level Adjustment .................................................................2-9 (E)
2-13. 4:3 Picture Frame Adjustment ............................................................2-10 (E)
HDVF-20A
1 (E)
3. Spare Parts
3-1. Exploded Views .......................................................................................... 3-1
3-2. Electrical Parts List ..................................................................................... 3-3
3-3. Supplied Accessories ..................................................................................3-9
3-4. Tools and Fixtures.......................................................................................3-9
4. Semiconductor Pin Assignments
5. Block Diagram
Overall Block ..............................................................................................5-2
6. Schematic Diagrams
VF-70 ..........................................................................................................6-1
DF-58 ..........................................................................................................6-4
VDA-41 .......................................................................................................6-5
VR-266 ........................................................................................................6-5
Frame Wiring ..............................................................................................6-6
7. Board Layouts
VF-70 ..........................................................................................................7-1
DF-58 ..........................................................................................................7-2
LP-105 .........................................................................................................7-2
VDA-41 .......................................................................................................7-2
VR-266 ........................................................................................................7-2
2 (E)
HDVF-20A
Purpose of this manual
Relative manual
Manual Structure
This manual is the maintenance manual for HD Electronic Viewfinder HDVF-20A.
This manual describes the information items necessary when the unit is supplied and
installed, items that premise the service based on the components parts such as
alignment, schematic diagrams, board layouts and spare parts lists, assuming use of
system and service engineers.
Besides this maintenance manual the following manual is available for this unit.
..
. Operation Manual (Supplied with this unit)
..
This manual is necessary for application and operation of this unit.
..
. “Semiconductor Pin Assignments” CD-ROM (Available on request)
..
This “Semiconductor Pin Assignments” CD-ROM allows you to search for
semiconductors used in Communication System Solutions Network Company
equipment.
Semiconductors that cannot be searched for on this CD-ROM are listed in the
maintenace manual for the corresponding unit. The maintenance manual contains
a complete list of all semiconductors and their ID Nos., and thus should be used
together with the CD-ROM.
Part number: 9-968-546-XX
HDVF-20A
3 (E)
Contents
The following are summaries of the each section for understanding the manual.
Section 1 Service Overview
Describes information about board locations, connector input/output signals,
cleaning and replacement of CRT.
Section 2 Elect`rical Alignment
Explains the general information for adjustment procedures and the electrical
adjustments of this unit.
Section 3 Spare Parts
Describes parts list, exploded views and supplied accessories used in the unit.
Section 4 Semiconductor Pin Assignments
Contains information on semiconductors used for the unit.
It includes a complete list of the semiconductors and their ID Nos. for retrieving
information on “Semiconductor Pin Assignments” CD-ROM, which is available
separately.
Please refer to this section together with the “Semiconductor Pin Assignments”
CD-ROM.
Information on the semiconductors not contained in the CD-ROM at the time of
issue of this manual, if any, is given in this section as well.
Section 5 Block Diagram
Describes overall block diagram of this unit.
Section 6 Schematic Diagrams
Describes schematic diagrams for every circuit board and frame wiring .
Section 7 Board Layouts
Describes board layouts for every circuit board.
4 (E)
HDVF-20A
Section 1
Service Overview
1-1. Location of Printed Circuit Boards 1-2. Connector Input/Output Signals
VF (20P MALE)
VR-266
VDA-41
VF-70
DF-58
LP-105
(EXTERNAL VIEW)
Pin No. Signal I/O Specifications
1 S-DATA IN/OUT TTL level
2NC
3 POWER IN ON : OPEN
OFF CTL OFF : GND
4 SCK IN TTL level
5 COLOR/BW OUT B/W : GND
COLOR : OPEN
6NC
7NC
8 G TALLY IN ON : 5V
OFF : GND
9 PEAKING OUT VF to CAM (Ro = 1 kZ)
CTL 0 V to 5 V
0 V : PEAKING OFF
5 V : PEAKING MAX
10 NC
11 NC
12 Y VIDEO IN 1.0 V p-p (Ro = 75 kZ)
13 VIDEO GND
14 NC
15 NC
16 NC
17 R TALLY IN ON : 5 V
OFF : GND
18 NC
19 UNREG GND
20 UNREG +10.5 V to 17 V
HDVF-20A
1-1 (E)
1-3. Replacing CRT
1-3. Replacing CRT
1. Loosen the screw of the MIC clamp and open the MIC
clamp.
2. Remove the two screws (K2.6 x 4).
3. Remove the three hexagonal socket bolts (2.6 x 6) and
remove the upper chassis.
4. Remove the two screws (P2 x 3.5) and the board
bracket.
Upper chassis
Board bracket
MIC clamp
P2 x 3.5
K2.6 x 4
P2 x 3.5
6. Remove the four screws and remove the CRT from the
VF tube assembly.
7. Remove the CRT tube from the CRT.
CRT
PTP2.6 x 8
VF tube
assembly
Lug
PTP2 x 6
PTP2.6 x 8
CRT tube
8. Remove the four screws and remove the microphone
spacer.
9. Disconnect the connector CN21 on the LP-105 board.
Microphone
spacer
K2 x 5
Hexagonal socket bolts 2.6
x 6
5. Disconnect the five connectors CN301, CN501 and
CN502 on the VF-70 board, CN102 on the DF-58
board and CN263 on the VDA-41 board and the anode
cable.
Anode cable
CRT
CN102
VDA-41 board
DF-58 board
CN501
CN263
CN301
CN502
VF-70 board
LP-105 board
CRT
K2 x 5
CN21
10. Install a new CRT in the reverse procedures of
removal.
n
When installing the upper chassis, take care not to
catch the harness between upper and lower chassis.
1-2 (E)
HDVF-20A
1-4. Disconnecting/Connecting Flexible Card Wire
1-5. Notes on Repair Parts
1-4. Disconnecting/Connecting Flexible
Card Wire
The flexible card wire is used between the VF-70 board
and VR-266 board. Take care not to break this flexible
card wire. This shorten the wire life.
Disconnecting
1. Turn off the power.
2. Slide portions A in the direction of the arrow to unlock
and pull out the flexible card wire.
Connecting
m
. 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 arrow and
insert the flexible card wire as far as it will go with the
conductive surface down.
2. Slide portions A in the reverse direction to lock.
A
1-5. Notes on Repair Parts
1. Safety Related Components Warning
w
Components marked ! are critical to safe operation.
Therefore, specified parts should be used in the case of
replacement.
2. Standardization of Parts
Some repair parts supplied by Sony differ from those
used for the unit. These are because of parts commonality 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 not be stocked. Therefore, the
delivery date will be delayed.
4. Units Representation
The following represented units are changed or
omitted in writing.
Units Representation
Capacitance uFuF
Inductance uHuH
Resistance Z Abbreviation
Temperature dC XXX-DEG-C
HDVF-20A
A
Conductive
surface
1-3 (E)
1-6. Circuit Description
1-6. Circuit Description
VF-70 board
The VF-70 board consists of a power supply block, H
deflection drive circuit and serial interface circuit for
various controls.
A switching regulator consists of IC401 and Q401 to
Q404, where +9.5 V and about +7.5 V for H driving are
generated from UNREG (10.5 to 17 V) input at pin B10 of
CN001. And H size adjustment is performed by controlling the reference dc voltage for IC401 with RV110 (H
SIZE) on the DF-58 board.
The H deflection circuit IC501 and Q501 are also used to
drive a flyback transformer. The flyback transformer
outputs HV (6 kV), G2 (500 V), 60 V and heater pulse
voltage. The heater pulse voltage is smoothed by C513,
and is adjusted in voltage by RV501 (HEATER). The
resultant is applied to the heater through IC503.
The voltage for feedback circuit is output at pin 1 of the
flyback transformer and is sent to a feedback circuit
consisting of IC501, IC502, Q502 and Q503 to stabilize a
high-voltage portion. When the voltage goes higher than
the reference, the power is turned off as pin 8 of IC502
goes high and a protection circuit operates.
IC301 and IC302 are serial interface ICs, which are used to
control indicators and to grab switch data and so on.
IC304 is a timer IC. It is used to set the time period during
which the zebra pattern is displayed in MOMENTARY
mode, and during which the brightness increases momentarily as the internal tally signal is turned on.
VR-266 board
The VR-266 board consists of a video amplifier circuit and
bright control circuit.
The video signal input at pin 3 of CN201 is adjusted in
level with RV201 (CONTRAST), and is sent through the
peaking circuit to the VDA-41 board.
DC voltage is adjusted with RV205 and RV206 (BRIGHT)
and is sent to the VF-70 board as a bright control voltage.
VDA-41 board
The video signal from the VR-266 board is shifted by a
constant voltage at D261 zener diode. And then the video
signal is amplified by Q261 and Q262, and is output to G1
through a drive circuit of Q263 to Q266. Q267 clamps the
blanking portion to stabilize the black level.
DF-58 board
The DF-58 board provides an external sync circuit, V
deflection drive circuit and blanking pulse generation
circuit.
IC104 is a sync separator, which separates sync signals
from the video signal input to the DF-58 board and outputs
the HD signal from pin 7 and VD signal from pin 3. The
HD signal is compared in phase with a flyback pulse at
IC101 and then enters AFC circuit.
The VD signal is input to pin 21 of IC101, and is then sent
to the V deflection drive circuit consisting of Q104 to
Q107 as a trigger pulse.
IC106 generates a video clamp pulse, and IC108 to IC115
generate a beam blanking pulse. These pulses are output to
the VF-70 board.
1-4 (E)
HDVF-20A
Section 2
Electrical Alignment
2-1. General Information for Electrical
Adjustment
2-1-1. Notes on Adjustment
w
There is a danger of an electric shock around the CRT due
to its high voltage. Great care should be taken in servicing.
Never touch a live CRT by bare hands.
Before performing adjustment, read throughly the following comments.
. Calibration for all measuring equipment should be
completed.
. Alignment of peripheral equipment such as camera
should be completed.
2-1-2. Equipment/Fixtures Required
Equipment
. HDVS camera system
HDC-950 or HDW-F900
. AC adaptor
AC-550/550CE or equivalent
. Oscilloscope
(Input capacitance of probe : 12 pF or below)
Tektronix 2465B or equivalent
. HDTV waveform monitor
Tektronix 1735HD/1730HD or equivalent
. HDTV B/W monitor
. Digital voltmeter
. Frequency counter
Fixtures
Fixtures Sony P/N
Pattern box PTB-500 J-6029-140-B
Resolution chart (16:9) J-6395-320-A
VF extension harness J-6395-050-A
2-1-3. Connection
VIEWFINDER
HDVF-20A
ENG/EFP LENS
PATTERN
BOX
COLOR VIDEO
CAMERA
HDC-950
or HDW-F900
(Figure : HDC-950)
TEST
OUT
75 Z
AC ADAPTOR
AC-550
A-ch
WAVEFORM
MONITOR
HDVF-20A
2-1 (E)
2-1-4. Extending Viewfinder
2-1-5. Setting of the VF SCAN Mode
2-1-6. Setting of the Format
2-1-4. Extending Viewfinder
1. Turn off the power before performing adjustment.
2. Remove the viewfinder from the camera.
3. Open the MIC clamp and remove the upper chassis.
(Refer to Section 1-3 “Replacing CRT” for details.)
Upper chassis
MIC clamp
2-1-5. Setting of the VF SCAN Mode
1. Before adjustment, set the VF SCAN mode to 16:9
following to the camera’s setup menu. (Refer to HDC950 or HDW-F900 Operation Manual for details.)
MENU : Operation
PAGE : VF Setup
ITEM : VF Scan → 16:9
2. Whenever you press DISPLAY/SCAN switch on the
viewfinder to SCAN, the picture frame mode toggles
between 16:9 and 4:3. Perform the adjustment in 16:9
mode unless otherwise specified.
2-1-6. Setting of the Format
There are some items which need adjusting by switching
among the each formats of 60i, 50i and 48i.
As for the switching method of the format, refer to the
HDC-950 or HDW-F900 Operation manual. Adjust in the
60i mode unless any specification exists.
4. Connect the viewfinder to the camera via the VF
extension harness.
5. Turn on the power.
2-2 (E)
HDVF-20A
DF-58 - component side -
RV120
RV119
RV107
RV106
RV112
RV108
RV101
RV121
RV114
RV113
RV123
CN101
CN102
RV102
RV111
RV116
RV122
RV110
RV109
RV105
RV118
RV117
RV104
RV103
RV115
2-2. Power Supply Voltage Adjustment
2-3. Vertical Hold Adjustment
2-4. Holizontal Hold Adjustment
2-2. Power Supply Voltage Adjustment
Equipment : Digital voltmeter
Adjustment Procedure
Test point : CN101-1pin/DF-58
Adjustment point : 1RV401/VF-70
Specification : 9.50 ±0.05 V dc
2-3. Vertical Hold Adjustment
Equipment : Frequency counter
Adjustment Procedure
Switch the format to 60i, 50i and 48i by the camera and
adjust the following RVs corresponding to each format.
Test point : CN102-1pin/DF-58
GND : Shielding case of FBT501/VF-70
Adjustment point : 1RV105/DF-58 (60i)
1RV117/DF-58 (50i)
1RV118/DF-58 (48i)
Specification : 55.0 ±0.5 Hz
2-4. Horizontal Hold Adjustment
Equipment : Frequency counter
Adjustment Procedure
Switch the format to 60i, 50i and 48i by the camera and
adjust the following RVs corresponding to each format.
Test point : CN101-7pin/DF-58
GND : Shielding case of FBT501/VF-70
Adjustment point : 1RV103/DF-58 (60i)
1RV115/DF-58 (50i)
1RV116/DF-58 (48i)
Specification : 33.75 ±0.25 kHz
HDVF-20A
IC501
RV401
RV501
*Soldering side
FBT501
*TP22
VF-70 - component side -
*TP23
2-3 (E)
2-5. Horizontal Duty Adjustment
2-6. Heater Voltage Adjustment
2-5. Horizontal Duty Adjustment
Equipment : Oscilloscope
Preparations
. Iris of the lens : CLOSE
. BRIGHT control : Fully counterclockwise 3
. CONTRAST control : Fully counterclockwise 3
. PEAKING control : Fully counterclockwise 3
Adjustment Procedure
Test point : IC501-7pin/VF-70
GND : Shielding case of FBT501/VF-70
Adjustment point : 1RV104/DF-58
Specification : T = 2.9 ±0.1 us
Turn 1RV104 fully counterclockwise, and slowly turn it
clockwise until the specification
is satisfied.
T
2-6. Heater Voltage Adjustment
Equipment : Digital voltmeter
Note
During adjustment, do not set heater voltage to 700 mV or
over.
Preparations
. BRIGHT control : Mechanical center
. CONTRAST control : Mechanical center
. PEAKING control : Mechanical center
Adjustment Procedure
Test point : TP22/VF-70
GND : TP23/VF-70
Adjustment point : 1RV501/VF-70
Specification : 650 ±30 mV dc
Turn 1RV501 fully clockwise, and
slowly turn it counterclockwise
until the specification is satisfied.
(Do not set heater voltage to
700 mV or over.)
n
If T is set to 2.5 us or below, high-voltage protection
circuit may become activated. In this case, power off once
and turn 1RV104/DF-58 fully counterclockwise. After
that power on again to perform the adjustment.
IC501
RV401
RV501
*Soldering side
FBT501
*TP22
VF-70 - component side -
*TP23
2-4 (E)
HDVF-20A
DF-58 - component side -
RV120
RV119
RV107
RV106
RV112
RV108
RV101
RV121
RV114
RV113
RV123
CN101
CN102
RV102
RV111
RV116
RV122
RV110
RV109
RV105
RV118
RV117
RV104
RV103
RV115
2-7. Focus Adjustment
2-7. Focus Adjustment
Subject : Resolution chart
Note
This focus adjustment, “2-8. Picture Frame Adjustment”
and “2-9. Bright Extent Adjustment” affect each other.
Therefore, repeat these adjustments until all specifications
are satisfied.
Preparations
. Shoot the resolution chart so that the chart frame is
aligned with the underscanned monitor frame with the
zoom control.
Adjustment Procedures
1. Adjustment point : 1RV109/DF-58
Specification : Turn1RV109 fully counter-
clockwise, and slowly turn it
clockwise until the optimum focus
is achieved.
2. After the adjustment, confirm that the focus can be
achieved at all settings of BRIGHT, CONTRAST and
PEAKING controls.
m
. If the picture frame adjustment is out of specifications,
especially in horizontal size, the focus may not be achieved.
In this case, turn 1RV112/DF-58 clockwise a little
(referring to Section 2-8), and perform the focus adjustment.
. The application of too-high voltage may make the high-
voltage protection circuit activated. In this case, power
off once and turn 1RV109/DF-58 fully counterclockwise.
After that power on again to perform the adjustment.
. Adjust the iris of the lens so that the output level (Y
level) at TEST OUT connector on the camera is 500 ±50
mV.
. BRIGHT control : Mechanical center
. CONTRAST control : Mechanical center
. PEAKING control : Fully counterclockwise 3
HDVF-20A
(Viewfinder screen)
2-5 (E)
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