Sony wrr 810 a service manual

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SONY;

UHF SYNTHESIZED PORTABLE TUNER

WRR-810A

SERVICE MANUAL
US Model
1st Edition (Revised 2)

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Table of Contents

LOPERATION -- +1
2. SERVICE INFORMATION ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 2~1
2.1. REMOVAL ......................

2-2. NOTES ON REASSEMBLY ~~
2-3. NOTE ON REPLACDIG THE MB~496 AND

DP»194 MOUNTED CIRCUIT BOARDS ----------------- 2-5
2-4. HOW TO USE THE EXTENSION CABLE

WITH 16? CONNECTORS
2-5. ERROR MESSAGES ww-

3. ELECTRICAL ALIGNMENT -

3-1. PREPARATION ~~~~~~~~~~~~~

3-1.1. Equipment and Tools ~- ~. 3.1
3-1-2. Notes on Adjustment m --3_2

3-2. ADJUSTMENT ..... ... m. .. 3.2
3-2-I. Power Supply Voltage Adjustment - -« 3-3
3-2-2. 4MHz Oscillation Frequency Adjustment --3-4
3-2-3. Front-End Bandpass Characteristics Adjustment

3-24. VCO Oscillation Frequency Adjustment -
3«2-5. Distortion Factor Adjustment

3-2-6. Sensitivity Adjustmen Hm -----
3-2-7. AF Output Level Adjustment -
3-2-8. Muting Level Setting ~ ------------

4.8EMICONDUCTOR PIN ASSIGNMENTS --------

5.BLOCK DIAGHAM ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 5_1
6.SCHEMATIC DIAGRAMS AND BOARD LAYOUTS "6-1

6-1. BOARD LAYOUTS ---------- --
6»2. SCHEMATIC DIAGRAMS ~0-

7_ SPARE PARTS ............................................. e

7_1_ NOTES ON REPAIR pART .. .................................... 7.1
7-2. EXPLODED VIEW AND PARTS LIST -~
7.3_ ELECTRICAL PARTS LIST
7-4. ACCESSORIES SUPPLIED

WFIFI-SI 0A