
1
WRR-855B
Table of Contents
1. Operating Instructions
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-342 Mounted Circuit Board .............................................. 2-5
2-3.
Precautions When Replacing EEPROM ..................................................... 2-5
2-4.
Error Messages ............................................................................................ 2-5
2-5.
Service Functions ........................................................................................ 2-6
2-6.
Connector Input/Output Signal ................................................................... 2-6
2-7.
Unleaded Solder .......................................................................................... 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-8 Board Adjustment .......................................................... 3-3
3-2-2.
Overall Characteristic Confirmation ........................................ 3-14
4. Spare Parts
4-1.
Notes on Repair Parts .................................................................................. 4-1
4-2.
Exploded View and Parts List ..................................................................... 4-2
4-3.
Electrical Parts List ..................................................................................... 4-4
4-4.
Supplied Accessories ................................................................................ 4-19
5. Semiconductor Pin Assignments
6. Block Diagrams
7. Board Layouts
TUN-8 ......................................................................................................... 7-2
CPU-342 ...................................................................................................... 7-4
DP-236 ........................................................................................................ 7-6
SW-814 ....................................................................................................... 7-6
Summary of Contents for WRR-855B
Page 1: ...UHF SYNTHESIZED TUNER UNIT WRR 855B SERVICE MANUAL 1st Edition Revised 2 ...
Page 4: ...2 WRR 855B 8 Schematic Diagrams TUN 8 8 1 CPU 342 8 8 DP 236 8 10 SW 814 8 10 ...
Page 10: ...1 6 WRR 855B Sony Corporation Printed in Japan ...
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Page 67: ...7 1 WRR 855B 7 1 Section 7 Board Layouts ...
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Page 84: ...Printed in Japan Sony Corporation 2006 6 16 2001 WRR 855B U CE E 9 976 898 03 ...