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SONY WRR855A
Service Manual


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  • Contains Circuit Diagrams
  • Download
  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of SONY WRR855A Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

The manual is available in languages: English

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Text excerpt from page 7 (click to view)
Setting
/ P C

Setting
G

Channel Selection
C H

Operations
A F

6 After the desired channel is displayed, leave the unit for
5 seconds without pressing any buttons. Channel selection mode is automatically canceled and the channel (or frequency) shown on the display is set. Storing the group and channel The selected group and channel set by the above procedure are stored in memory when the display stops flashing.

1 Turn the POWER switch ON.
After the “HELLO” message, the tuner status shown before the tuner was previously turned OFF appears on the display.
Note

Notes

Take the following precautions to prevent interference and noise. • Do not simultaneously use two or more microphones and transmitters that are set to the same channel. • When simultaneously using two or more tuners, always set the tuners that use the same groups (other than group 00) to different channels in that group. • The reception antennas and transmitter should be used at least 3 meters away from each other.

Distortion-check function Before operating a wireless microphone or transmitter, you can check for possible distortion by using the distortioncheck function of this unit. To check the distortion, simultaneously press the + and – buttons in the channel selection mode (the channel number flashes). The channels of the selected group are automatically switched one by one in sequence (this operation is called “scanning”).
Notes

POWER switch operation should be performed after disconnecting the input from connected equipment, as noise will be heard if the switch is turned ON or OFF beforehand.

2 Press and hold the GP button down for more than one
second. The tuner goes to the group selection mode and the group number flashes.

2
+
H

3,5
ING S MUT ON

• When the MUNING switch is ON and the unit is not in the T OFF mode (see page 13), scanning stops and the channel at that time is selected if a tone signal (32.768 kHz) is detected in the signal received during scanning. However, scanning will not stop if a distorting signal having no tone signal is received. In this case, check for the distortion by observing the RF input level indicator. • Scanning is automatically canceled when all the channels of the selected group are scanned twice. To cancel scanning in progress, press any of the operation buttons. • If an extremely strong signal is received, scanning may stop at a point other than the actual channel.

4 1

G

P

–

POWER

Operations

10

R

T

F

OFF SIZED HE -855 F SYNT WRR IT UH R UN UNE

12

3 Press the + or – button to select the group.
Pressing the + button cyclically changes the groups in the order of 00 to 11 to 12 to 13 to A1 to A2 to A3 to L1 to L2 to H1 to H2 and pressing the – button changes them in the reverse order. Press and hold down the button to continuously change the display. ¿
– button + button

4 Press the CH button when the desired group is displayed.
The tuner goes to the channel selection mode and the channel number flashes.

Setting and Releasing the T (Tone Squelch) OFF Mode
The WRR-855A has the following three muting functions, which work in combination. (1) Muting by RF input level: As sufficient S/N for the audio output may not be obtained if no RF signal is received or the RF input level is low, the audio output can be muted when the RF input level falls below the selected level. (2) Tone squelch: The audio output is obtained only when the tuner receives an RF signal which includes a specified tone signal. The audio output is muted to eliminate noise which may be heard when the transmitter is turned on/off or the tuner receives an interference RF signal. (3) Noise squelch: The audio output is muted to eliminate noise which may be heard when there is such excessive interference RF signal that the tone squelch does not work. Only the muting functions described in (2) can be canceled by selecting the Tone-squelch OFF (T OFF) mode when desired. Apply this mode when you use a transmitter with no specified tone signal. Selecting the T OFF mode Turn the power ON while pressing and holding the GP and – buttons. Release the buttons after the “HELLO” message appears. “T OFF” is momentarily displayed and the tuner goes to the T OFF mode. The T OFF mode is maintained even when the power is turned OFF. Resuming from the T OFF mode To cancel the T OFF mode, turn the power ON while pressing and holding the GP and + buttons, and release the buttons after “HELLO” appears on the display. “T ON” is momentarily displayed and the tuner resumes the normal status.

Display example for U68 model

÷

...

5 Press the + or – button to select the channel.

If no buttons are pressed for 5 seconds, the group selection mode is automatically canceled and the lowest frequency channel in the group selected at that time is displayed. For Group 00, however, the channel previously set in Group 00 appears.

Pressing the + button cyclically changes the channels of the group selected in step 3 in the listed order in the respective table in the “Wireless Channel Lists” on pages 15 to 23. Pressing the – button changes them in the reverse order.
+ button

÷ ¿
– button Display example for U68 model

For US model

When you reach the last channel in the group, press the + button to return to the first channel in the group. Likewise, press the – button to go from the first channel to the last channel. When the group is set to 00, press either of these buttons to move through the 94 channels one by one.
(Continued)

1-3 WRR-855A

11

13

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