UHF SYNTHESIZED WIRELESS MICROPHONE
WRT-807A
SERVICE MANUAL
CE Model
AU Model
1st Edition
WRT-807A (CE, 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
WRT-807A (CE, AU)
TABLE OF CONTENTS
1. OPERATING INSTRUCTIONS
2. SERVICE OVERVIEW
2-1.
DISASSEMBLY ......................................................................................... 2-1
2-2.
NOTE ON PARTS REPLACEMENT AND REASSEMBLY ................... 2-4
2-2-1.
Precautions on Reassembly ........................................................ 2-4
2-2-2.
Note on Parts Replacement ........................................................ 2-5
3. ELECTRICAL ALIGNMENT
3-1.
EQUIPMENT AND TOOLS ...................................................................... 3-1
3-2.
ADJUSTMENTS ........................................................................................ 3-2
3-2-1.
Power Supply Voltage Check .................................................... 3-3
3-2-2.
Carrier Frequency Adjustment ................................................... 3-4
3-2-3.
RF Power Output Adjustment .................................................... 3-4
3-2-4.
Reference Frequency Deviation Adjustment ............................. 3-5
3-2-5.
Maximum Frequency Deviation Adjustment ............................. 3-6
3-2-6.
Distortion Ratio Check ............................................................... 3-7
3-2-7.
S/N Check .................................................................................. 3-8
3-2-8.
Frequency Characteristics Check ............................................... 3-8
3-2-9.
Tone Signal Adjustment ............................................................. 3-9
3-2-10. Battery alarm signal check ....................................................... 3-10
3-2-11. Spurious Emissions Check ....................................................... 3-12
4. SEMICONDUCTOR PIN ASSIGNMENTS
5. SPARE PARTS
5-1.
NOTES ON REPAIR PARTS .................................................................... 5-1
5-2.
EXPLODED VIEW AND PARTS LIST .................................................... 5-2
5-3.
ELECTRICAL PARTS LIST ..................................................................... 5-4
5-4.
ACCESSORIES SUPPLIED ...................................................................... 5-8
6. BLOCK DIAGRAM
2
WRT-807A (CE, AU)
7. BOARD LAYOUTS AND SCHEMATIC DIAGRAMS
7-1.
BOARD LAYOUTS ................................................................................... 7-1
CN-1868 .................................................................................................... 7-1
DP-306 ...................................................................................................... 7-1
MB-860 ..................................................................................................... 7-1
7-2.
SCHEMATIC DIAGRAMS ....................................................................... 7-2
CN-1868 .................................................................................................... 7-2
MB-860 ..................................................................................................... 7-2
DP-306 ...................................................................................................... 7-4
1-1
WRT-807A
(CE,
AU)
WRT
-807A
(CE)
SECTION
1
OPERATING
INSTRUCTIONS
This
section
is
extracted
from
operation
manual.
© 1999 by Sony Corporation
[CE62] [CE69]
Operating Instructions
page 1
Bedienungsanleitung
Seite 1
Wireless Channel Lists / Übertragungskanallisten
GB
DE
3-866-337-21(1)
WRT-807A
UHF Synthesized
Wireless Microphone
1
GB
Table of Contents
English
Precautions ................................................................ 1
Introduction ............................................................... 2
Transmitting Channel Band .............................. 2
Features ............................................................. 3
Parts Identification .................................................... 5
Power Supply ............................................................ 8
Settings ...................................................................... 9
Initiating Setting Mode ..................................... 9
Changing the Transmitting Channel ................. 9
Changing the Input Attenuation Setting .......... 11
Resetting the Accumulated Battery Life
Time Indication ......................................... 12
Troubleshooting ...................................................... 13
Specifications .......................................................... 15
Error Messages ....................................................... 16
Precautions
· The unit is designed for use in ambient temperature range
of 0°C to 50°C (32°F to 122°F).
· Do not place the unit on or near heat sources, such as
lighting equipment, power amplifiers, or in a place subject
to direct sunlight or excessive moisture. In such places,
the external finish or internal parts of the unit may be
damaged.
· If the unit is used in a very humid or dusty place or in a
place subject to an active gas, clean its surface as well as
the connectors with a dry, soft cloth soon after use.
Lengthy use of the unit in such places or not cleaning it
after its use in such places may shorten its life.
· When cleaning the unit, never use organic solvents such as
thinners or benzine, which will damage the finish of the
unit.
· The unit has been factory adjusted precisely. Do not
tamper with its internal parts or attempt to repair it.
· Do not attempt to recharge an alkaline battery.
· Do not dispose of a battery in fire. Do not disassemble or
short-cirtuit a battery.
· Make sure to use an LR6 (size-AA) alkaline battery.
· Make sure the poles of the battery match the + and
markings in the battery holder.
· Remove the battery when the unit will not be used for a
long period of time.
2
GB
Introduction
The WRT-807A is a UHF-synthesized wireless microphone
for use in a 800-MHz band UHF-synthesized wireless
microphone system.
The WRT-807A operates in conjunction with the WRR-
800A/801A/802A, MB-806A UHF Synthesized Tuner for
vocal concentration.
The WRT-807A can be also used with existing Sony
wireless microphone systems consisting of the WRT-810A/
820A/822A/830A UHF Synthesized Transmitter and WRR-
810A/820A/840A/850A UHF Synthesized Tuner.
Transmitting Channel Band
The microphone/transmitter and tuners of wireless
microphone systems are classified by frequency band.
A 14-MHz frequency band (or two consecutive-numbered
TV channels, such as 62 and 63 of the WRT-807A/CE62
model) or an 8-MHz frequency band (or TV channel 69 and
UK General Use) is assigned to each microphone/transmitter
and tuner model.
In building a UHF wireless microphone system, be sure to
pair a microphone/transmitter with a tuner that has the same
TV channel number.
CE62 model
A 14-MHz frequency band is assigned to the WRT-807A/
CE62 model, permitting it to operate any of 111 carrier
frequencies in 125-kHz steps of the Sony original channel
plan or 561 carrier frequencies in 25-kHz steps of the
German User Groups in the range of TV channels 62 and
63.
CE69 model
An 8-MHz frequency band is assigned to the WRT-807A/
CE69 model, permitting it to operate on any of 64 carrier
frequencies in 125-kHz steps of the Sony original channel
plan in the range of TV channel 69 or 14 carrier frequencies
in 25-kHz steps of the UK General Use.
For the selectable wireless channels and frequencies, see
"Wireless Channel Lists."
3
GB
Features
Phase Locked Loop (PLL) synthesized system
The WRT-807A features a refined phase locked loop (PLL)
synthesizer circuit.
POWER switch with holding function
The POWER switch can be locked in the ON position to
protect against accidental power cut-offs.
Low-battery notification on tuner
When the microphone battery is low, the microphone sends
a warning to the WRR-800A/801A/802A/805A/850A, MB-
806A in the form of "Battery status information."
This information is sent to the WRR-800A/801A/802A/
805A/850A, MB-806A about one hour before the battery
goes dead to allow the battery to be safely replaced.
When the WRR-800A/801A/802A/805A/850A, MB-806A
receives this information, the LED and the LCD on tuner
panel start to flash.
Powered by readily available battery type
The built-in, high-efficiency DC-DC converter provides
about five hours of continuous and stable operation with just
a single LR6 (size-AA) alkaline battery.
LCD readout of various information
The microphones LCD shows the current channel number,
frequency, input attenuation setting, and residual battery
power.
The accumulated battery use time is also indicated (in one-
minute increments) to allow precise monitoring of battery
use.
Automatic saving of channel and input attenuation
settings
All channel and input attenuation settings are automatically
saved when the microphone is turned off (and are
maintained even when the battery is removed), thus
eliminating the need to make the same settings again the
next time you use the microphone.
Highly reliable electronic attenuator
Adjustable in a range of 0 dB to 21 dB in 3-dB steps, the
built-in input level attenuator reduces signal distortion
during the input of excessively strong audio signals.
Tone signal-incorporated RF carrier signal
The microphone transmits an RF carrier signal that
incorporates a tone signal to enable any tuner with a tone
squelch circuit to pick out only the target audio signal.
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