UHF SYNTHESIZED TUNER UNIT
WRR-855A
SERVICE MANUAL
U Model
AU Model
1st Edition (Revised 1)
Printed in Japan
Sony Corporation
1999. 4 11
Broadcasting & Professional Systems Company
©1995
WRR-855A (U, AU) E
9-976-819-02
WRR-855A (U, AU)
! 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
WRR-855A
Table of Contents
1. Operation
2. Service Overview
2-1.
Removal ...................................................................................................... 2-1
2-2.
Notes on Parts Replacement ........................................................................ 2-4
2-2-1.
Front Panel Assembly ................................................................ 2-4
2-2-2.
CPU-208 Mounted Circuit Board .............................................. 2-5
2-3.
Precautions When Replacing EEPROM ..................................................... 2-5
2-4.
Error Messages ............................................................................................ 2-6
2-5.
Service Functions ........................................................................................ 2-6
2-6.
Connector Input Signal ............................................................................... 2-6
3. Electrical Alignment
3-1.
Preparation .................................................................................................. 3-1
3-1-1.
Equipment and Tools ................................................................. 3-1
3-2.
Adjustments ................................................................................................. 3-2
3-2-1.
TUN-7 Board Adjustment .......................................................... 3-3
3-2-2.
Overall Characteristic Confirmation ........................................ 3-14
4. Semiconductor Pin Assignments
5. Block Diagrams
6. Board Layouts and Schematic Diagrams
7. Spare Parts
7-1.
Notes on Repair Parts .................................................................................. 7-1
7-2.
Exploded View and Parts List ..................................................................... 7-2
7-3.
Electrical Parts List ..................................................................................... 7-4
7-4.
Accessories Supplied ................................................................................ 7-10
1-1
WRR-855A
For
US
model
Section
1
Operation
This
section
is
extracted
from
operation
manual.
2
Table of Contents
Owner's Record
The model and serial numbers are located at the rear of the
unit. Record the serial number in the space provided below.
Refer to these numbers whenever you call upon your Sony
dealer regarding this product.
Model No. WRR-855A
Serial No.
You are cautioned that any changes or modifications not
expressly approved in this manual could void your authority
to operate this equipment.
Notice for customers in Canada:
Use of Sony wireless devices is regulated by the
Industry Canada as described in their Radio Standard
Specification RSS-123.
A licence is normally required. The local district office of
Industry Canada should therefore be contacted. When the
operation of the device is within the broadcast band, the
licence is issued on no-interference, no-protection basis with
respect to broadcast signals.
Avis pour les clients au Canada:
L'usage des appareils sans-fil Sony est réglé par l'Industrie
Canada, comme décrit dans leur Cahier des Normes
Radioélectriques CNR-123. Une licence est normalement
requise. Le bureau de l'Industrie Canada doit être contacté.
Lorsque l'opération de l'appareil est dans les limites de la
bande de radiodiffusion, la licence est émanée sur la base
de non-interférence, non-protection avec les signaux de
radiodiffusion.
Overview ........................................................................... 3
Features ........................................................................ 3
System Configuration .................................................. 4
Parts Identification .......................................................... 5
WRR-855A .................................................................. 6
BTA-801 Portable Tuner Mount Adapter (Optional) .. 7
Preparations ..................................................................... 8
Mounting to a Portable Tuner Mount Adapter ............ 8
Connecting the Power Cable ........................................ 9
Attaching the Antennas ................................................ 9
Setting ............................................................................. 10
Channel Selection ...................................................... 10
Selecting and Releasing the T (Tone Squelch) OFF
Mode .......................................................................... 13
Wireless Channel Selectable ......................................... 14
Guidance on Use of Multi-Channel System .............. 14
Wireless Channel Lists (1) For 68-Version Model
Using TV Channels 68 and 69 ................................... 15
Wireless Channel Lists (2) For 66-Version Model
Using TV Channels 66 and 67 ................................... 18
Wireless Channel Lists (3) For 64-Version Model
Using TV Channels 64 and 65 ................................... 21
Attaching and Connecting to a Betacam ..................... 24
Precautions ..................................................................... 26
Messages on the Display ................................................ 27
Specifications ................................................... Back cover
3
Overview
Versatile display
A variety of information is obtained at a glance on the
upper panel, such as the reception channel with the liquid-
crystal display, and RF input level and audio level with the
respective LEDs.
Compact and lightweight
Innovative, high-density mounting technology has enabled
the creation of this compact, lightweight tuner. Using the
optional BTA-801 Portable Tuner Mount Adapter in
combination, the WRR-855A can be easily attached to a
Betacam-series Camcorder.
Weatherproof structure
By properly mounting the WRR-855A to the optional BTA-
801 Portable Tuner Mount Adapter and attaching the two
supplied antennas, a weatherproof structure is obtained.
Muting ON/OFF function
You can activate or deactivate the muting function to suit
your needs.
Tone-squelch circuit for noise elimination
The unit uses a built-in squelch circuit to selectively receive
the desired RF carrier accompanied by the tone signal from
the transmitter.
Compander system
A compander (compressor/expander) system enables
stabilized wireless transmission over a wide dynamic range.
The WRR-855A UHF Synthesized Tuner Unit in use with
an optional Portable Tuner Mount Adapter, such as the
BTA-801, provides a highly reliable portable diversity
tuner for the 800 MHz band Sony UHF wireless
microphone system, which uses the frequency bands
allocated for UHF TV broadcasting.
This tuner enables the application of multiple channels over
unused television channels through the use of the built-in
Sony original channel plan.
Features
Phase Locked Loop (PLL) Synthesized System
The WRR-855A with its refined PLL synthesized circuit
can operate on 94 wireless channels.
Preset wireless channel groups for easy multichannel
operation
In addition to a group allowing all 94 wireless channels to
be selected, the WRR-855A has six preprogrammed groups,
that is, a combination of wireless channels which permits
simultaneous operation of multiple channels without
intermodulation.
Space diversity reception system
The WRR-855A provides stable signal reception with only
a minute amount of dropout.
4
System Configuration
The WRR-855A can be used with the WRT-807A/810A/
830A/867A UHF synthesized wireless microphone or
WRT-808A/820A/822A/860A UHF synthesized
transmitter.
Overview
Sony 800 MHz band system models
a) These models cover only 68 and 69 channels.
b) For these models, the AN-820A UHF antenna and the WD-820A UHF antenna divider are required.
WRR-855A
a)
b)
b)
a)
a)
a)
b)
Frequency band
Model name
Model
TV
channel
Frequency (MHz)
Transmitter or
microphone
Tuner
U64
64
770.125 - 775.875
WRT-807A
WRT-808A
WRT-810A
WRT-820A
WRT-822A
WRT-830A
WRT-860A
WRT-867A
WRR-810A
WRR-820A
WRR-840A
WRR-850A
WRR-860A
65
776.125 - 781.875
U66
66
782.125 - 787.875
67
788.125 - 793.875
U68
68
794.125 - 799.875
69
800.125 - 805.875
5
UHF
SYNTHESIZED
TUNER
UNIT
WRR-855
ON
OFF
MUTING
POWER
CH
GP
+
GP/CH
RF
AF
S
Parts Identification
5 Accessory connector
1 ANT connectors
2 POWER switch
3 MUTING switch
8 Liquid-crystal display
6 GP button
!¡ AF indicator
!TM RF indicator
7 CH button
9 + button
0 button
WRR-855A
BTA-801 Portable Tuner Mount Adapter (optional)
!£ DC 12V IN connector
!¢ Betacam attachment
knob
! OUTPUT connector
4 Mounting screws (4)
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