Sony WRT-822B User manual

UHF SYNTHESIZED TRANSMITTER
WRT-822B
SERVICE MANUAL
1st Edition

WRT-822B
!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-822B
Table of Contents
1. Operating Instructions.....................................................................1-1
2. Service Overview
2-1. Disassembly ................................................................................................2-1
2-2. Notes on Parts Replacement........................................................................2-2
2-2-1. EEPROM (IC405) Replacement ................................................2-2
2-3. Error Messages............................................................................................2-2
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 ....................................................3-5
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 ...............................................3-9
3-2-9. Tone Signal Adjustment...........................................................3-10
3-2-10. Battery Alarm Signal Check ....................................................3-11
3-2-11. Spurious Emissions Check .......................................................3-13
4. Spare Parts
4-1. Notes on Repair Parts..................................................................................4-1
4-2. Exploded Views ..........................................................................................4-2
4-3. Electrical Parts List .....................................................................................4-3
4-4. Supplied Accessories ..................................................................................4-7
5. Semiconductor Pin Assignments.............................................5-1
6. Block Diagram.......................................................................................6-1

2WRT-822B
7. Board Layout
MB-940 .......................................................................................................7-1
8. Schematic Diagrams
MB-940 .......................................................................................................8-1

1-1
WRT-822B
Section 1
Operating Instructions Reprinted from the
operating instructions
3-205-431-11 (1)
UHF Synthesized
Transmitter
Sony Corporation 2001 Printed in Japan
Operating Instructions
WRT-822B
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. WRT-822B Serial No.____________
Notice for customers in the
U.S.A.
Use of Sony wireless devices is regulated by the
Federal Communications Commission as
described in Part 74 subpart H of the FCC
regulations and users authorized thereby are
required to obtain an appropriate license.
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.
Operation of this device is subject to the
following two conditions: (1) this device may not
cause interference, and (2) this device must
accept any interference, including interference
that may cause undesired operation of the
device.
Notice for customers in Europe
• 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 expose to an active or corrasive
gas, clean its surface as well as the connectors with a
Precautions
Note on the model available in Europe
When you operate the WRT-822B on the
bandwidth between 470 MHz and 566 MHz,
be sure to fix a Ferrite Clamp to the
microphone cable, near the microphone
connector as shown below.
0889
U.K. 854.125 - 862 MHz
Turkey 854.125 - 862 MHz
Spain
841.250, 841.750, 842.250, 842.750 MHz
843.250, 848.750, 849.250, 849.750 MHz
850.250, 850.750, 851.250, 851.750 MHz
Germany798 - 822 MHz
Norway 800 - 820 MHz
Luxembourg
800 - 830 MHz, 854.125 - 862 MHz
Belgium 854.125 - 862 MHz
Denmark800 - 820 MHz
France 470 - 830 MHz
Greece 800 - 820 MHz
Ireland 800 - 820 MHz
Italy 800 - 820 MHz
Portugal 800 - 820 MHz
Sweden 800 - 820 MHz
Switzerland
800 - 820 MHz
Finland 800 - 814 MHz
Iceland 800 - 814 MHz
Austria 774 - 790 MHz
Netherlands
774 - 782 MHz
Hereby, Sony Corporation, declares that this
WRT-822B is in compliance with the essential
requirements and other relevant provisions of
Directive 1999/5/EC.
Note:
In some countries additional frequency bands
may be used with the agreement of the national
authority.
Note for customers in Austria:
Before use, it is necessary to obtain
individual permission of the local
telecommunications spectrum authority.
Note for customers in Switzerland:
Before use, a request of concession for a
wireless microphone (Frequency Class 3)
has to be submitted to Bakom.
Note for customers in Finland:
To own and use, it is necessary to obtain an
individual licence of the Telecommunications
Administration Center.
Note for customers in Luxembourg:
Before any use of an equipment, the
frequencies required have to be, if necessary
according to the regulations in force,
assigned prior to usage by the “ILT”.
Note for customers in Italy:
The use of this product within Italy is subject
to article 334 of the Postal and
Telecommunications regulations.
Nota per i clienti in Italia:
L’uso del prodotto sul territorio italiano è
soggetto alle regolamentazioni del Codice
Postale e delle Telecomunicazioni art. 334.
Notes on Microphone System Operation
Overview
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.
The WRT-822B is a transmitter for a UHF
synthesized wireless microphone system to be used
for broadcast or movie production purpose. This
transmitter is suitable for Electronic News gathering
(ENG) and Electronic Field Production (EFP).
The microphone/transmitter and tuner of the wireless
microphone system are classified by frequency band.
A 24-MHz frequency band is assigned to each
microphone/transmitter and tuner model. In building a
UHF wireless microphone system, be sure to combine
a microphone/transmitter and a tuner having the same
wireless channel (frequency).
Features
The features of the WRT-822B are:
– Phase Locked Loop (PLL) synthesized system
– Compact and lightweight
– Remote battery alarm on tuner
– Operation powered by easily available batteries
– LCD for coordinated operation control
– Saved channel and input attenuation settings
– Highly reliable electronic attenuator
– Compatibility with Sony lavalier microphone
– RF carrier with tone signal
– Wide dynamic range and low noise
Error Messages
When a problem occurs, one of the following error message may appear on the display.
Messages
ERROR 11
ERROR 21
ERROR 31
Contents
An error occurred in backup memory data.
The PLL synthesized circuit is in trouble.
The battery voltage exceeds the allowable value.
•To operate with two or more channels, maintain a
distance of at least 30 cm (one ft.) between each pair
of transmitters.
For details of operation with two or more channels,
refer to the Operating Instructions for the WRR-802/
805/855/862, etc.
•Ensure that the tuners set to channels not being used
are either turned off or set to the minimum output
level.
•When powering the transmitter on or off, to keep the
noise to a minimum, set the audio output level from
the tuner or mixer to a minimum.
•Powering the transmitter on without checking the
channel selection first may interfere with the
operation of other microphones/transmitters, if the
current setting is already being used.
•To prevent noise generation, keep the microphones
and transmitters at least 3 m (10 feet) away from the
antennas when the system is operated using a group
which allows selection of up to 11 channels, and at
least 6 m (20 feet) away when using a group which
allows selection of 12 channels.
•When there is a strong interference signal around the
microphone system, such as an interference caused
by an active handyphone, noise may occur on the
microphone system.
Transmitter and modulator section
Oscillator Crystal controlled PLL
synthesizer
Type of emission F3E
Carrier frequencies Model available in USA:
470 to 608 MHz
614 to 806 MHz
Model available in Europe:
470 to 606 MHz
614 to 862 MHz
Operating frequency band
24 MHz
Refer to the “Sony Wireless
Microphone System Frequency
List” supplied with this manual.
RF power output 20 mW (50-ohm load)
Frequency stability Within ±15 kHz
Tone signal 32.768 kHz
Battery condition signal
32.782 kHz
Type of antenna
1
/
4
-wavelength wire
Pre-emphasis 50µs
Deviation ±5 kHz
(–60 dBv, 1 kHz input )
Frequency response 70 to 15,000 Hz
Signal-to-noise ratio60 dB or more (A-weighted,
modulation frequency 1 kHz,
with ±5 kHz deviation at
WRR-802)
Audio attenuator 0 to 21 dB, variable in 3-dB
steps
Input level
–60 dBv at audio attenuator 0 dB
Maximum input level
–3 dBv at audio atteuator 21 dB
Specifications Power section
Power requirements 3.0 V DC (two LR6/size AA
alkaline batteries)
Battery life Approx. 6 hours at 25°C
(77°F) with Sony LR6 alkaline
batteries
General
Operating temperature
0°C to +50°C (32°F to 122°F)
Storage temperature –30°C to +60°C
(–22°F to +140°F)
Dimensions 63 ×103 ×17 mm (w/h/d)
(2
1
/
2
×4
1
/
8
×
11
/
16
inches)
Mass Approx. 145 g (5.1 oz)
including batteries
Supplied accessories
Operating Instructions
Model available in USA (3)
Model available in Europe (4)
Sony wireless Microphone System Frequency List (1)
Soft case (1)
Ferrite clamp (supplied with CE21/24/27/30 model
only) (1)
Optional accessories
Lavalier microphones
ECM-44BC, ECM-55BC, ECM-66BC,
ECM-77BC, ECM-166BC, ECM-310BC,
ECM-350BC
Microphone cable
EC-1.5CF
Design and specifications are subject to change
without notice.
0 dBv = 1 Vrms
............................................................................................
About 70 mm
(3 inches)
Wind the cable once around the
clamp.
Ferrite clamp
(supplied with CE21/24/27/30
model only)
Contact your Sony dealer.
Use the specified batteries.
Measures

1-2 WRT-822B
BATT
–
+
SET
OFF
ON
AFRF
CH
AF RF BATT
AB C
24
5
Battery
holder
1
Parts Identification
Transmitting
frequency
Attenuation
level
Accumulated
battery use
time
Channel/frequency indications show those of the
CE62 model.
Transmitting channel: The current transmitting
channel setting.
Transmitting frequency: The current transmitting
fequency setting.
Attenuation level: The input attenuation level setting
in dB. Can be set within a range of 0 to 21 dB in 3-dB
steps.
Accumulated battery use time: The accumulated
time of battery use (in one-minute increments).
2+ (+ selection) / –(–selection/reset)
buttons
In setting mode, select the transmission channel,
frequency and attenuator level using either of these
buttons, or reset the time-of-use indication to “00:00”
with the –button.
3Audio input connector
Connect the output connector of the following Sony
lavalier microphones: ECM-44BC, ECM-55BC,
ECM-66BC, ECM-77BC, ECM-166BC,
ECM-310BC, ECM-350BC.
You can also use your wired microphone by
connecting it to this connector with an optional EC-
1.5CF microphone cable.
Caution
When connecting a microphone to the unit, be sure to
turn the unit off.
4SET button
In Transmitting mode, press this button to change the
indicated items in the lower half of the LCD disaply.
To change the settings on each item, set the
transmitter in Setting mode as follows; turn the
POWER switch to ON while holding the SET button
down. Then press the SET button to select the itmes
to be changed, and press the +/–buttons to change the
settings.
5POWER switch
Turns the transmitter ON or OFF.
When you set this switch to ON without holding
down any other button, the transmitter enters
Transmitting mode, and transmits the signal of the
selected channel.
Note
Be sure to connect a microphone before turning the
power ON.
Power Supply
Two LR6 (size AA)
alkaline batteries
The transmitter can operate on two LR6 (size AA)
alkaline batteries continuously for about 6 hours at
25°C (77°F).
Installing the batteries
1
Slide the battery-holder catches inward ( in the
direction of the arrows bB) to take out the battery
holder.
2
Match the polarities and insert the batteries.
3
Set the battery holder in the original position.
Battery indication
When you turn the power on, the battery status
appears in the BATT indication on the display section
as shown on the right column.
To secure the microphone cable connection,
be sure to turn and lock the connector cover.
Microphone (not supplied)
Wire antenna
3
SET
Use a ball point pen or
similar instruments to
press +/–, SET buttons.
Press SET
button.
Settings
For the transmitting channels and frequencies
selectable on your transmitter, see the “Sony Wireless
Microphone System Frequency List”supplied with
this manual.
Initiating Setting Mode
In Setting mode, you can change the transmission
channel/frequency and the attenuation level, or reset
the accumulated time indication.
To enter Setting mode
While holding down the SET button, set the POWER
switch to ON.
The transmitter enters Setting mode and the indication
before the transmitter was previously turned OFF
flashes on the display section.
Each time you press the SET button, the setting items
are cyclically switched as shown on the
“DCH (channel) indication”of the “Parts
Identification”(see the left most column).
Changing the Transmitting
Channel
The transmitting channel can be selected through
either the channel number or the frequency.
1
Set the transmitter to Setting mode.
If the channel number (or frequency) indication
does not appear, press the SET button until the
channel number (or frequency) indication appears.
2
Press the + or –button to select the channel
number (or frequency).
Pressing the + button cycles the indication in the
order shown in the tables in the “Sony Wireless
Microphone System Frequency List”supplied with
the manual. Pressing the –button cycles the
indications in the opposite direction.
Hold down the button to change the channel
number (or frequency) quickly.
Note on the model available in Europe
On the model available in Europe, the transmitting
channels are grouped in four sets.
Select the group number before selecting the
channel number as follows.
1)When the left two digits flash, select the group
number by pressing the + or –button.
2)When the desired group number appears, press
the SET button.
The right four digits start to flash for channel
number selection.
3)Select the channel number by pressing the + or –
button.
4)When the desired channel number appears, press
the SET button.
3
When the desired channel number (or frequency)
appears, set the POWER switch to off position to
release Setting mode, or press the SET button to
continue operations in Setting mode.
The next time you turn on the transmitter (by setting
the POWER switch to ON), the transmitter will enter
Transmitting mode with the selected channel number
(or frequency).
Attenuation level
Accumulated time
Channel indication D
shows that of the
CE62 model.
Group
selection Frequency
selection
Channel
selection
Group, channel and frequency selection
examples for the model available in Europe
(CE62)
m:
+ button
M :
–button
1LCD (liquid-crystal display) display
AAF (audio input) indication
Lights whenever an audio signal stronger than the
reference level is received.
BRF (antenna output) indication
Lights during signal transmission from the antenna.
CBATT (battery) indication
Shows the battery condition.
See “Battery indication”in “Power Supply”section.
DCH (channel) indication
Shows transmitting channel.
Each time you press the SET button in Transmitting
mode, the channel indication changes as follows.
When the batteries reach stage 3shown in the table,
the BATT indication on the WRR-802/805/862 and
WRU-806 also starts flashing.
Note
The indication may be incorrect if the batteries are not
new when installed. If you plan to use the transmitter
for a long period, it is best to replace the batteries with
new ones.
Notes on batteries
•Use new alkaline batteries.
•Do not pair different types of battery.
•Always replace the two batteries together.
•The batteries are not rechargeable.
•Be careful to install the batteries with the correct
polarity.
•When not using the transmitter for a long period,
remove the batteries to avoid leakage. If the
batteries do leak, clean all leakage from the battery
holder case and the unit. Leakage left in the holder
case and the unit may cause poor battery contact. If
there seems to be poor battery contact, consult your
Sony dealer.
D
Transmitting
channel
12 34
BATT
indication Lights Lights Flashes Goes off
Good Less than
half-
charge
Battery
condition Almost
exhausted Completely
exhausted
Notes
•The transmitter cannot transmit in Setting mode.
•Make sure that the channel selected on the
transmitter is the same as that selected on the tuner
being used in the same system.
•Depending on the noise or interference conditions,
all selectable channels may not be usable. If
necessary, you can determine which channels are
usable by cycling the channel selection through a
number of channels on the tuner with the unit set to
OFF. Those channels for which the RF indicator on
the tuner does not light are usable.
•If there is a TV broadcasting station near by, do not
use the station’s channel.
•The transmitter may not operate correctly if it is
turned on immediately after being turned off in
Setting mode. Wait for a few seconds before turning
the power on again.
•The channel numbers and frequencies of your
transmitter are shown on the “Sony Wireless
Microphone System Frequency List”supplied with
the manual.
Changing the Input
Attenuation Setting
You can change the input attenuation setting in 3-dB
steps in a range of 0 to 21 dB. You can change it
either in Setting mode or in Transmitting mode.
Changing in Setting mode
1
Set the unit in Setting mode.
2
Press the SET button until the attenuation level
indication appears on the display.
3
Press the + or –button to select the attenuation
level.
If you keep either button pressed, the level will be
incremented or decremented successively.
4
Once the desired level appears, set the POWER
switch to OFF to release Setting mode.
Or, press the SET button to continue operations in
Setting mode.
The next time you turn on the power only by setting
the POWER switch to ON, the transmitter will be set
to Transmitting mode with the selected attenuation
setting.
Changing in Transmitting mode
You can also change the input attenuation level during
transmission.
1
If the attenuation level is not displayed, press the
SET button until the attenuation level indication
appears on the display.
2
Press the + or –button to select the level.
Resetting the Accumulated Time
Indication
The time indication accumulates time in hours and
minutes when the WRT-822B is on.
Reset the indication to “00:00”whenever you replace
the batteries so that it can display the running time of
the batteries.
1
Set the unit in Setting mode.
2
Press the SET button until the accumulated time
indication appears on the display.
3
Press the –button.
The time indication resets to “00:00.”
While you see “00:00”indication, you can go back
to previous value by pressing the + button.
4
Set the POWER switch to OFF to release Setting
mode.
Or, press the SET button to continue operations in
Setting mode.

2-1
WRT-822B
Section 2
Service Overview
2-1. Disassembly
Case (lower) /Battery case
Audio Connector/MB-940 Board/Case (Upper)
B TITE 2x12 B TITE 2x12
Case (lower)
Battery case
Antenna
Connector (S) 4P
Bracket (MC)
MB-940 Board
CN501
Battery
Terminal
Assy
Case (upper)
Knob (P)
Case (upper)
Red
Black
Red Gray
Gray
White
BlackWhite
CN102 CN501
NG Battery
Terminal
Assy
Spring, battery coil
NOTE
Insert the wire into notch of the
front case and assembly the it.
CN102

2-2 WRT-822B
2-2. Notes on Parts Replacement
2-2-1. EEPROM (IC405) Replacement
On the EEPROM (IC405) mounted on the MB-940 board, frequency data corresponding to each WRT-822B have been
written. After replacing an EEPROM, it is necessary to write the corresponding frequency data to the new EEPROM.
2-3. Error Messages
When a problem occurs, one of the following error messages may appear on the display.
Messages Contents Measures
Error 11 An error occurred in backup memory data. It is necessary to write the corresponding frequency data to the
EEPROM.
Error 21 The PLL synthesized circuit is in trouble. Check the PLL synthesized circuit (IC300, CP300, and its peripheral
circuit) on MB-940 board.
Error 31 The battery voltage exceeds the allowable value. Use the specified batteries.

3-1
WRT-822B
Section 3
Electrical Alignment
3-1. Equipment and Tools
Equipment Required
Name Specifications Model Name
DC Power Supply Output regulated voltage: 0 to 5 V, 2 A _
DC Ammeter Measurement range: 300 mA _
Spectrum Analyzer Frequency: 10 kHz to 10 GHz ADVANTEST R3371B or equivalent
Modulation Analyze RF input Frequency: 150 kHz to 3 GHz ANRITSU MS616A or equivalent
RF Power Meter Range: 3 uW to 100 mW HEWLETT PACKARD 435B (with Power sensor HEWLETT
with Power sensor PACKARD 8482A) or equivalent
Audio Analyzer Oscillator: 20 Hz to 100 kHz HEWLETT PACKARD 8903B (with A-weight filter) or equivalent
Distortion meter
S/N meter
Level meter
Frequency Counter Frequency: 10 Hz to 1000 MHz HEWLETT PACKARD 5385A or equivalent
Effective digits: 10 digits
Resolution: 0.1 Hz
Oscilloscope Frequency: DC to 10 MHz _
Digital Volt Meter Effective digits: 31/ digits _
2
Tools Required
Name Part No. Remarks
MM-SMA (J) connector J-6402-480-A For RF signal input
SMA-BNC (J) connector J-6402-490-A For RF signal input
Mic input cable _Refer to “How to make a Mic input cable”.
Adjustor (0.4 x 1.3 mm) 7-721-052-81
How to make a Mic input cable
Required parts
SMC9-4P connector: 1 (Part No. 1-560-155-00)
Single-core shielded cable
3
Single core shielded cable
Bottom view
2
4
1
Solder.
SMC9-4P connector
4
3
1
2

3-2 WRT-822B
3-2. Adjustments
This section describes the following adjustments and checks
required to satisfy specifications.
Adjustment and Check Items
3-2-1. Power Supply Voltage Check
3-2-2. Carrier Frequency Adjustment
3-2-3. RF Power Output Adjustment
3-2-4. Reference Frequency Deviation Adjustment
3-2-5. Maximum Frequency Deviation Adjustment
3-2-6. Distortion Ratio Check
3-2-7. S/N Check
3-2-8. Frequency Characteristics Check
3-2-9. Tone Signal Adjustment
3-2-10. Battery Alarm Signal Check
3-2-11. Spurious Emissions Check
Preparation
1. When adjustments are performed, remove the MB-940
board (with battery terminal and Mic input connector)
from WRT-822B unit.
Refer to the “Section 2. Service Overview” for removal.
2.
Connect the MM-SMA (J) connector (J-6402-480-A)
with SMA-BNC (J) connector (J-6402-490-A) to the an-
tenna connector (CN301) on the MB-940 board as
shown below.
3. Connecting the DC power supply.
Supply the DC power to the battery terminal springs as
shown below.
Check
After the DC power supply connection is completed, set
the power switch (S500) to ON, and check the level on
DC ammeter.
DC ammeter indication level: 140 to 180 mA
CN301 MB-940 Board
(A side)
MM-SMA (J) connector
SMA-BNC (J) connector
MB-940 Board
(B side)
DC power supply DC ammeter
DC output voltage : +3.0 ±0.1 V
Red
Black
Battery terminal

3-3
WRT-822B
CN301 (RF input)
S401 (–)
S400 (+)
TP501
(GND)
TP500 (+3.0V) S500 (POWER)
TP5V
TP3V
ON
OFF
S402 (SET)
MB-940 Board
(A side)
MB-940 Board
(B side)
CN102 RV101
(∆F max)
RV102
(Limitter: Only CE)
CT400 (Freq)
RV300
(RF Power)
RV201
(Tone ∆F) RV202 (∆F)
CN501
MIC input connector (SMC9-4P)
Adjustment Location 3-2-1. Power Supply Voltage Check
Equipment and Tools Required
DC power supply
DC output voltage: +3.0 ±0.1 V dc
DC ammeter
DC volt meter (or Digital multimeter)
Adjuster (Sony Part No. 7-721-052-81)
Switch and Control Setting
The following setting is to be perform with the SET switch
(S402), “+” switch (S400) and “_” switch (S401).
Transmitting Channel setting:“Don't Care”
Attenuation setting: “Don't Care”
Accumulated time setting: “Don't Care”
Procedure
(1) Set the POWER switch (S500) on the MB-940 board to
ON.
(2) Check the DC Voltage of the TP5V terminal to the spec-
ified voltage as below:
Specification:DC Voltage at TP5V terminal
= +5.0 ±0.1 V dc (For Vcc1)
(3) Check the DC voltage of the TP3V terminal to the spec-
ified voltage as below:
Specification:DC voltage at TP3V terminal
= +3.3 ±0.1 V dc (For Vcc2)
TP501
(GND)
TP5V TP3V
ON
MB-940 Board
(A side)
DC voltmeter

3-4 WRT-822B
3-2-2. Carrier Frequency Adjustment
Equipment and Tools
DC power supply
DC output voltage: +3.0 ±0.1 V dc
DC ammeter
Frequency counter
Adjustor (Sony Part No. 7-721-052-81)
MM-SMA (J) connector (Part No. J-6402-480-A)
SMA-BNC (J) connector (Part No. J-6402-490-A)
Connections
(For connecting the DC power supply, refer to the “Preparations”
on page 3-2.)
Switch and Control Setting
The following setting is to be perform with the SET switch
(S402), “+” switch (S400) and “_” switch (S401).
Transmitting Channel setting:
CE21 model; Group 00, 22-32 channel (482.000 MHz)
CE33 model; Group 00, 34-32 channel (578.000 MHz)
CE62 model; Group 00, 63-32 channel (810.000 MHz)
CE67 model; Group 00, 68-32 channel (850.000 MHz)
U14 model; 16-01 channel (482.125 MHz)
U30 model; 32-01 channel (578.125 MHz)
U62 model; 64-01 channel (770.125 MHz)
U66 model; 68-01 channel (794.125 MHz)
Attenuation setting: “Don't Care”
Accumulated time setting: “Don't Care”
Procedure
(1) Connect the frequency counter to the antenna connec-
tor (CN301) with MM-SMA (J) and SMA-BNC (J)
connectors.
(2) Adjust 1CT400 so that the frequency counter reading
meets the following specification.
Specification:Carrier frequency mentioned in the
table below.
WRT-822B Carrier frequency
CE21 model 482.000 MHz ±1 kHz
CE33 model 578.000 MHz ±1 kHz
CE62 model 810.000 MHz ±1 kHz
CE67 model 850.000 MHz ±1 kHz
U14 model 482.125 MHz ±1 kHz
U30 model 578.125 MHz ±1 kHz
U62 model 770.125 MHz ±1 kHz
U66 model 794.125 MHz ±1 kHz
Adjustment: 1CT400/MB-940 Board (B side)
MB-940 Board
(A side)
Frequency counter
CN301
MM-SMA (J)connector with SMA-BNC (J) connector

3-5
WRT-822B
MB-940 Board
(A side)
Power meter
CN301
Power sensor
MM-SMA (J)connector with SMA-BNC (J) connector
MB-940 Board
(A side)
CN301
Modulation
analyzer Audio
analyzer
Distortion
meter
CN102
RV101
RV102
RV202
MB-940 Board
(B side)
Audio analyzer
Oscillator
Level meter
Mic input connector (SMC9-4P)
Mic input cable
MM-SMA (J)connector with
SMA-BNC (J) connector
RF IN
AF OUT
3-2-3. RF Power Output Adjustment
Equipment and Tools
DC power supply
DC output voltage: +3.0 ±0.1 V dc
DC ammeter
Power meter (with power sensor)
MM-SMA (J) connector (Part No. J-6402-480-A)
SMA-BNC (J) connector (Part No. J-6402-490-A)
Adjustor (Sony Part No. 7-721-052-81)
Connections
(For connecting the DC power supply, refer to the “Preparations”
on page 3-2.)
Switch and Control Setting
The following setting is to be perform with the SET switch
(S402), “+” switch (S400) and “_” switch (S401).
Transmitting Channel setting:
CE21 model; Group 00, 22-32 channel (482.000 MHz)
CE33 model; Group 00, 34-32 channel (578.000 MHz)
CE62 model; Group 00, 63-32 channel (810.000 MHz)
CE67 model; Group 00, 68-32 channel (850.000 MHz)
U14 model; 16-01 channel (482.125 MHz)
U30 model; 32-01 channel (578.125 MHz)
U62 model; 64-01 channel (770.125 MHz)
U66 model; 68-01 channel (794.125 MHz)
Attenuation setting: “Don't Care”
Accumulated time setting: “Don't Care”
Procedure
(1) Connect the power meter (with power sensor) to the an-
tenna connector (CN301)
with MM-SMA (J) and SMA-
BNC (J) connectors
.
(2) Adjust 1RV300 so that the power meter reading meets
the following specification.
Specification:Power meter = +20 ±2mW
Adjustment: 1RV300/MB-940 Board (B side)
3-2-4. Reference Frequency Deviation
Adjustment
Equipment and Tools
DC power supply
DC output voltage: +3.0 ±0.1 Vdc
DC ammeter
Audio analyzer
Modulation analyzer
MEASUREMENT: FM
MEASUREMENT RANGE: AUTO or ±10 kHz
(manual operation)
HPF: 50 Hz
LPF: 20 kHz or 15 kHz
DE EMPHASIS: 50 us
Adjustor (Sony Part No. 7-721-052-81)
Mic input cable (See page 3-1.)
MM-SMA (J) connector (Part No. J-6402-480-A)
SMA-BNC (J) connector (Part No. J-6402-490-A)
Connections
(For connecting the DC power supply, refer to the “Preparations”
on page 3-2.)

3-6 WRT-822B
3-2-5. Maximum Frequency Deviation
Adjustment
n
Be sure to perform this adjustment after “3-2-4. Reference
Frequency Deviation Adjustment” has been completed.
Equipment and Tools
DC power supply
DC output voltage: +3.0 ±0.1 V dc
DC ammeter
Audio analyzer
Modulation analyzer
MEASUREMENT: FM
MEASUREMENT RANGE: AUTO or ±100 kHz
HPF: 50 Hz
LPF: 15 kHz or 20 kHz
DE EMPHASIS: 50 us
Oscilloscope
Adjustor (Sony Part No. 7-721-052-81)
MIC input cable (See page 3-1.)
MM-SMA (J) connector (Part No. J-6402-480-A)
SMA-BNC (J) connector (Part No. J-6402-490-A)
Connections
Same as “3-2-4. Reference Frequency Division adjustments”.
Switch and Control Setting
The following setting is to be perform with the SET switch
(S402), “+” switch (S400) and “_” switch (S401).
Transmitting Channel setting:
CE21 model; Group 00, 21-01 channel (470.125 MHz)
CE33 model; Group 00, 33-01 channel (566.125 MHz)
CE62 model; Group 00, 62-01 channel (798.125 MHz)
CE67 model; Group 00, 67-01 channel (838.125 MHz)
U14 model; 14-01 channel (470.125 MHz)
U30 model; 30-01 channel (566.125 MHz)
U62 model; 62-01 channel (758.125 MHz)
U66 model; 66-01 channel (782.125 MHz)
Attenuation setting: 0 dB
Accumulated time setting: “Don't Care”
Switch and Control Setting
The following setting is to be perform with the SET switch
(S402), “+” switch (S400) and “_” switch (S401).
Transmitting Channel setting:
CE21 model;Group 00, 22-32 channel (482.000 MHz)
CE33 model;Group 00, 34-32 channel (578.000 MHz)
CE62 model;Group 00, 63-32 channel (810.000 MHz)
CE67 model;Group 00, 68-32 channel (850.000 MHz)
U14 model; 16-01 channel (482.125 MHz)
U30 model; 32-01 channel (578.125 MHz)
U62 model; 64-01 channel (770.125 MHz)
U66 model; 68-01 channel (794.125 MHz)
Attenuation setting: 0 dB
Accumulated time setting: “Don't Care”
Procedure
(1) Input 1 kHz, _60 dBV (_57.8 dBm) signal to the MIC
input connector (SMC9-4P) with Mic input cable.
(2) Adjust 1RV102 so that the frequency deviation for the
modulation analyzer reading meets the following speci-
fication.
Specification:Frequency deviation = Maximum
Adjustment: 1RV102/MB-940 board (B side)
(3) Adjust 1RV101 so that the frequency deviation for the
modulation analyzer reading meets the following speci-
fication.
Specification:Frequency deviation = Maximum
Adjustment: 1RV101/MB-940 board (B side)
(4) Adjust 1RV202 so that the frequency deviation for the
modulation analyzer reading meets the following speci-
fication.
Specification:Frequency deviation
= ±5 kHz ±0.1 kHz
Adjustment: 1RV202/MB-940 board(B side)
(5) After the adjustment has been completed, perform the
“3-2-5. Maximum Frequency Deviation Adjustment”.

3-7
WRT-822B
Procedure
For U14/U30/U62/U66 model
(1) Input 1 kHz, _24 dBV (_21.8 dBm) signal to the MIC
input connector (CN102) with Mic input cable.
(2) Adjust 1RV101 so that the frequency deviation for the
modulation analyzer reading meets the following speci-
fication.
Specification:Frequency deviation
= ±38 kHz+1 kHz
_2
Adjustment: 1RV101/MB-940 board (B side)
For CE21/CE33/CE62/CE67 model
(1) Input 10 kHz, _24 dBV (_21.8 dBm) signal to the MIC
input connector (SMC9-4P) with Mic input cable.
(2) Adjust 1RV102 so that the frequency deviation for the
modulation analyzer reading meets the following speci-
fication.
Specification:Frequency deviation = Maximum
Adjustment: 1RV102/MB-940 board (B side)
(3) Input 1 kHz, _24 dBV (_21.8 dBm) signal to the MIC
input connector (CN102) with Mic input cable.
(4) Adjust 1RV101 so that the frequency deviation for the
modulation analyzer reading meets the following speci-
fication.
Specification:Frequency deviation
= ±26 kHz ±0.5 kHz
Adjustment: 1RV101/MB-940 board (B side)
(5) Adjust 1RV102 so that the frequency deviation for the
modulation analyzer reading meets the following speci-
fication.
Specification:Frequency deviation
= ±24.5 kHz ±0.5 kHz
Adjustment: 1RV102/MB-940 board (B side)
3-2-6. Distortion Ratio Check
Equipment and Tools
DC power supply
DC output voltage: +3.0 ±0.1 V dc
DC ammeter
Audio analyzer
Modulation analyzer
MEASUREMENT: FM
MEASUREMENT RANGE: AUTO or ±40 kHz
HPF: 50 Hz
LPF: 15 kHz or 20 kHz
DE EMPHASIS: 50 us
Oscilloscope
MIC input cable (See page 3-1.)
MM-SMA (J) connector (Part No. J-6402-480-A)
MB-940 Board
(A side)
CN301
Modulation
analyzer Distortion
analyzer
Oscilloscope
RF IN
CN102
MB-940 Board
(B side)
Audio analyzer
Oscillator
Mic input connector (SMC9-4P)
Mic input cable
Level meter
MM-SMA (J)connector with
SMA-BNC (J) connector
AF OUT
SMA-BNC (J) connector (Part No. J-6402-490-A)
Connections
(For connecting the DC power supply, refer to the “preparations”
on page 3-2.)

3-8 WRT-822B
3-2-7. S/N Check
Equipment and Tools
DC power supply
DC output Voltage: +3.0 ±0.1 V dc
DC ammeter
Audio analyzer
Modulation analyzer
MEASUREMENT: FM
MEASUREMENT RANGE: ±40 kHz
HPF: 50 Hz
LPF: 15 kHz for HEWLETT
PACKARD equipment
20 kHz for ANRITSU
equipment
DE EMPHASIS: 50 µs
MIC input cable (See page 3-1.)
MM-SMA (J) connector (Part No. J-6402-480-A)
SMA-BNC (J) connector (Part No. J-6402-490-A)
Connections
Same as “3-2-6. Distortion Ratio Check”.
Switch and Control Setting
The following setting is to be perform with the SET switch
(S402), “+” switch (S400) and “_” switch (S401).
Transmitting Channel setting:
CE21 model; Group 00, 21-01 channel (470.125 MHz)
CE33 model; Group 00, 33-01 channel (566.125 MHz)
CE62 model; Group 00, 62-01 channel (798.125 MHz)
CE67 model; Group 00, 67-01 channel (838.125 MHz)
U14 model; 14-01 channel (470.125 MHz)
U30 model; 30-01 channel (566.125 MHz)
U62 model; 62-01 channel (758.125 MHz)
U66 model; 66-01 channel (782.125 MHz)
Attenuation setting: 0 dB
Accumulated time setting: “Don't Care”
Procedure
(1) Connect the audio analyzer (level meter) to the AF OUT
connector on the modulation analyzer.
(2) Input 1 kHz, _60 dBV (_57.8 dBm) signal to the MIC
input connector (SMC9-4P) with Mic input cable from
audio analyzer (oscillator).
(3) Set the audio analyzer to S/N measurement (with A-
weighted filter).
(4) Check that the S/N reading is more than 32 dB. (with
MIC input connector short-circuited).
Switch and Control Setting
The following setting is to be perform with the SET switch
(S402), “+” switch (S400) and “_” switch (S401).
Transmitting Channel setting:
CE21 model; Group 00, 21-01 channel (470.125 MHz)
CE33 model; Group 00, 33-01 channel (566.125 MHz)
CE62 model; Group 00, 62-01 channel (798.125 MHz)
CE67 model; Group 00, 67-01 channel (838.125 MHz)
U14 model; 14-01 channel (470.125 MHz)
U30 model; 30-01 channel (566.125 MHz)
U62 model; 62-01 channel (758.125 MHz)
U66 model; 66-01 channel (782.125 MHz)
Attenuation setting: 0 dB
Accumulated time setting: “Don't Care”
Procedure
(1) Connect the audio analyzer (distortion analyzer) to the
AF OUT connector on the modulation analyzer.
(2) Set the audio analyzer to distortion measurement
(distortion mode).
(3) Input 1 kHz, _60 dBV (_57.8 dBm) signal to the MIC
input connector (SMC9-4P) with Mic input cable from
audio analyzer (oscillator).
(4) Check that the distortion analyzer reading is less than
0.90 %.
(5) Input 1 kHz, _24 dBV (_21.8 dBm) signal to the MIC
input connector (SMC9-4P) with Mic input cable.
(6) Check that the distortion analyzer reading is less than
3 %.

3-9
WRT-822B
3-2-8. Frequency Characteristics Check
Equipment and Tools
DC power supply
DC output Voltage: +3.0 ±0.1 V dc
DC ammeter
Audio analyzer
Modulation analyzer
MEASUREMENT: FM
MEASUREMENT RANGE: ±40 kHz
HPF: 50 Hz
LPF: 15 kHz or 20 kHz
DE EMPHASIS: 50 µs
Oscilloscope
MIC input cable (See page 3-1.)
MM-SMA (J) connector (Part No. J-6402-480-A)
SMA-BNC (J) connector (Part No. J-6402-490-A)
Connections
Same as “3-2-6. Distortion Ratio Check”.
Switch and Control Setting
The following setting is to be perform with the SET switch
(S402) , “+” switch (S400) and “_” switch(S401).
Transmitting Channel setting:
CE21 model; Group 00, 21-01 channel (470.125 MHz)
CE33 model; Group 00, 33-01 channel (566.125 MHz)
CE62 model; Group 00, 62-01 channel (798.125 MHz)
CE67 model; Group 00, 67-01 channel (838.125 MHz)
U14 model; 14-01 channel (470.125 MHz)
U30 model; 30-01 channel (566.125 MHz)
U62 model; 62-01 channel (758.125 MHz)
U66 model; 66-01 channel (782.125 MHz)
Attenuation setting: 0 dB
Accumulated time setting: “Don't Care”
Procedure
(1) Connect the audio analyzer (level meter) to the AF OUT
connector for the modulation analyzer.
(2) Set the audio analyzer to level meter mode.
(3) Input 1 kHz, _60 dBV (_57.8 dBm) signal to the Mic
input connector (SMC9-4P) with Mic input cable from
audio analyzer (oscillator).
(4) Reads the indication on the audio analyzer (level meter) .
(5) Set the SENSITIVITY on the audio analyzer (level
meter) so that the audio analyzer (level meter) reads 0
dB.
(6) Switch the oscillation frequency for the audio analyzer
(oscillator) from 1 kHz to 100 Hz.
(7)
Check that audio analyzer (level meter) reading is 0
±
1.0 dB.
(8) Next, switch the oscillation frequency for the audio ana-
lyzer (oscillator) from 100 Hz to 10 kHz.
(9) Check that the reading for the audio analyzer (level
meter) is 0.5
±
2.0 dB.

3-10 WRT-822B
Procedure
(1) Set the spectrum analyzer as follows:
CENTER FREQUENCY(fc):
CE21 model; 470.125 MHz
CE33 model; 566.125 MHz
CE62 model; 798.125 MHz
CE67 model; 838.125 MHz
U14 model; 470.125 MHz
U30 model; 566.125 MHz
U62 model; 758.125 MHz
U66 model; 782.125 MHz
REFERENCE LEVEL: 20 dBm
FREQUENCY SPAN: 200 kHz (20 kHz/DIV)
RBW (resolution band width): 3 kHz
VBW (video band width): 1 kHz
ATT: 30 dB
(2) Adjust 1RV201 so that level between carrier frequency
(frequency center level) on spectrum analyzer and tone
signal is within 29 dB ±1 dB.
3-2-9. Tone Signal Adjustment
Equipment and Tools
DC power supply
DC output Voltage: +3.0 ±0.1 V dc
DC ammeter
Frequency counter
Spectrum analyzer
Modulation analyzer
MM-SMA (J) connector (Part No. J-6402-480-A)
SMA-BNC (J) connector (Part No. J-6402-490-A)
Switch and Control Setting
The following setting is to be perform with the SET switch
MB-940 Board
(A side)
Spectrum analyzer
CN301
MM-SMA (J) connector with SMA-BNC (J) connector
(S402) , “+” switch (S400) and “_” switch (S401).
Transmitting Channel setting:
CE21 model; Group 00, 21-01 channel (470.125 MHz)
CE33 model; Group 00, 33-01 channel (566.125 MHz)
CE62 model; Group 00, 62-01 channel (798.125 MHz)
CE67 model; Group 00, 67-01 channel (838.125 MHz)
U14 model; 14-01 channel (470.125 MHz)
U30 model; 30-01 channel (566.125 MHz)
U62 model; 62-01 channel (758.125 MHz)
U66 model; 66-01 channel (782.125 MHz)
Attenuation setting: 0 dB
Accumulated time setting: “Don't Care”
1. Frequency deviation adjustment
Connections
(For connecting the DC power supply, refer to the “Preparations”
on page 3-2.)
32.768 kHz
V : 10 dB/div
H : 20kHz/div
29 ±1 dB
20 dBm
fc

3-11
WRT-822B
2. Frequency check
Connections
(For connecting the DC power supply, refer to the “Preparations”
on page 3-3.)
Procedure
n
Perform the checking with the Mic input connector (SMC9-
4P) short-circuit.
(1) Set the modulation analyzer as follows:
MEASUREMENT: FM
MEASUREMENT RANGE: ±40 kHz
HPF: 4 kHz
LPF: >20 kHz
DE EMPHASIS: OFF
(2) Check that the frequency counter (resolution : 0.1 Hz
setting) reading is 32.768 kHz ±1 Hz.
3-2-10.Battery Alarm Signal Check
Equipment and Tools
DC power supply
DC output Voltage: +3.0 ±0.1 V dc
DC ammeter
Frequency counter
Spectrum analyzer
Modulation analyzer
MM-SMA (J) connector (Part No. J-6402-480-A)
SMA-BNC (J) connector (Part No. J-6402-490-A)
Switch and Control Setting
The following setting is to be perform with the SET switch
(S402) , “+” switch (S400) and “_” switch(S401).
Transmitting Channel setting:
CE21 model; Group 00, 21-01 channel (470.125 MHz)
CE33 model; Group 00, 33-01 channel (566.125 MHz)
CE62 model; Group 00, 62-01 channel (798.125 MHz)
CE67 model; Group 00, 67-01 channel (838.125 MHz)
U14 model; 14-01 channel (470.125 MHz)
U30 model; 30-01 channel (566.125 MHz)
U62 model; 62-01 channel (758.125 MHz)
U66 model; 66-01 channel (782.125 MHz)
Attenuation setting: 0 dB
Accumulated time setting: “Don't Care”
1. Frequency deviation check
Connections
(For connecting the DC power supply, refer to the “Preparations”
on page 3-2.)
MB-940 Board
(A side)
Modulation
analyzer Frequency counter
RF IN
AF OUT
MM-SMA (J)connector with SMA-BNC (J) connector
CN301
MB-940 Board
(A side)
Spectrum analyzer
CN301
TP501 (GND)
Connect a jumper wire between
TP200 and TP501 (GND) by soldering.
(TONE signal : OFF).
TP200
MM-SMA (J)connector with SMA-BNC (J) connector
Jumper
wire

3-12 WRT-822B
MB-940 Board
(A side)
Spectrum analyzer
CN301
TP501 (GND)
Connect a jumper wire between
TP200 and TP501 (GND) by soldering.
(TONE signal : OFF).
TP200
MM-SMA (J)connector with SMA-BNC (J) connector
Jumper
wire
Procedure
n
Perform the checking with the MIC input connector short-
circuited.
(1) Set the spectrum analyzer as follow:
CENTER FREQUENCY (fc):
CE21 model; 470.125 MHz
CE33 model; 566.125 MHz
CE62 model; 798.125 MHz
CE67 model; 838.125 MHz
U14 model; 470.125 MHz
U30 model; 566.125 MHz
U62 model; 758.125 MHz
U66 model; 782.125 MHz
REFERENCE LEVEL: 20 dBm
FREQUENCY SPAN: 200 kHz (20 kHz/DIV)
RBW (resolution band width): 3 kHz
VBW (video band width): 1 kHz
ATT: 30 dB
(2) Decrease gradually the DC output voltage of the DC
regulated power supply and confirm that the battery
alarm signal turns on at 2 ±0.2 V.
(3) Check that level difference between carrier frequency
(center frequency level) on spectrum analyzer and tone
signal is with in 29 ±2 dB.
V : 10 dB/div
H : 20kHz/div
29 ±2 dB
20 dBm
fc
32.782 kHz
2. Frequency check
Connections
(For connecting the DC power supply, refer to the “Preparations”
on page 3-2.)
Procedure
n
Perform the checking with the Mic input connector (SMC9-
4P) short-circuited.
(1) Set the modulation analyzer as follows:
MEASUREMENT: FM
MEASUREMENT RANGE: ±40 kHz
HPF: 4 kHz
LPF: >20 kHz
DE EMPHASIS: OFF
(2)
Set the DC output voltage of DC power supply to 1 ±0.1
V so that battery alarm signal goes on.
(3)
Check that frequency counter (resolution:0.1 Hz) read-
ing is 32.782 kHz
±
1 Hz.
(4) After the checking, remove (unsolder) the jumper wire
between TP200 and TP501 (GND) on the MB-940
board (A-side).
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