Sony xr u 550 service manual

Page 2

XR-U550/U550RDS/U551RDS/U660/U66ORDS/U661RDS

Antenna terminal

External antenna connector

Intermediate frequency 450 kHz

Sensitivity

XR-U550/U550RDS/Ueso/UssoRDs
sow

XR-U551RDS/U861RDS
MW: 30 ,iv
LW: 50 iv

Power amplifier section

Outputs

Speaker impedance

Speaker outputs
(sure seal connectors)
32 - 8 ohms

Maximum power output

20 Wx4 (at 4 ohms)
" Measured at 14.4 V

General

Output lead

Tone controls

Loudness

Power req

Dimensions

Mounting

Weight

Accessories supplied

Power antenna relay control

lead

Power amplifier control lead

Bass :10 dB at 100 Hz

Treble :10 dB at 10 kHz

+10 dB at 100 Hz

+6 dB at 10 kHz

12 V DC car battery

(negative ground)

Approx 186 x 57 x 174 mm
(w/hld),

not incl. projecting parts and

controls

dimensions

Approx. 182 x 53 x154 mm
(w/hld),

not incl projecting parts and

contnrols

Approx. 1.3 kg

Mounting hardware (1 set)

Power connecting cord (1)

Front panel case (1)

iii rements

Optlonal accessory

Remote commander

FlM-Xao (except the model for
XR-U550RDSIU551RDS)

Design and specifications subject to change without

notice.

TABLE OF CONTENTS

Section M 12g;

Specifications .................................. 1

1 . GENERAL
Installation ............................................. 3
Connections ............................. 5
Precautions .............................. 7
Location and Function of Controls ~~~~~~~~~~~~~~~~ 7
Detaching and Attaching the Front Panel ----- 8
Setting the Clock ......................... 8
Listening to the Tape Playback -------------- 9
Locating a Desired Track ----------------- 9
Playing in Other Modes .................... 10
Searching for the Stations Automatically ----- 10
Tuning in by Adjusting the Frequency ----------- ll
Mcmorizing the Stations Automatically ------ ll
Mcmorizing Only the Desired Stations ------- 11
Receiving Stations Stored in the Memory ~~~~~ 12
Overview of thc RDS Function ~~~~~~~~~~~~~ 12
StationName Display - - ~ ~ 12
Automatic Re-tuning - 13
Receiving Traffic Information ------------- 13
Listening to the CD Play ~~~~~~ ' 14
Locating a Desired Disc, Track or
PanofaTrack 14
Playing in Other Modes --------- - 15
Displaying the Title of Each Disc - 16
Playing Selected Tracks on 3 Disc ~ - ~ - 17
Editing a Custom File -------- - 17
Maintenance ---------- - - 18
Troubleshooting Guide ------------------ 18

Section Mg Page
2. DISASSEMBLY
2.1. Cover ................................................... 19
2-2. Front Panel Assy ---------------- - 19
2-3. Mechanism Deck Block - 20
2.4. Power Board ........................................... 20
3. ADJUSTMENTS
3-1. Mechanical Adjustment -------
3,; Test Mode ................
3-3. Electrical Adjustments --------------------
4. DIAGRAMS
4-1. Pin Descriptions ------------- 27
4-2. Block Diagram -------------- 34
4-3. Printed Wiring Boards and Schematic

Diagram (AMP Section) ------- _~ ----------- 37
4-4. Printed Wiring Boards (Main Section) - - 42
45. Schematic Diagram (Main Section) ------- - 47
4-6. Printed Wiring Boards and Schematic

Diagram (Key Section) ------------------- 51
4-7. Printed Wiring Boards and Schematic

Diagram (EQ, Reel, PL Section) ~~~~~~~~~~~~~~~~~~ 55
5. EXPLODED VIEWS -------------------- 57
6. ELECTRICAL PARTS LIST ~~~~~~~~~~~~ 62