2
Notes on Chip Component Replacement
•Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be
damaged by heat.
XVM-R70
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE
WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN
THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE
PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR
IN SUPPLEMENTS PUBLISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0 SUR LES
DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
5-10. IR Transmitter Check ....................................................... 15
5-11. V COM Voltage/Position Adjustment .............................. 16
5-12. Video Adjustment............................................................. 16
5-12-1. Brightness Signal Contrast Level (Y GAIN) ......... 16
5-12-2. Black Limiter Level Adjustment............................ 16
5-12-3. White Limiter Level Adjustment ........................... 16
5-12-4. R Sub Brightness Adjustment ................................ 16
5-12-5. B Sub Brightness Adjustment ................................ 16
5-12-6. R Sub Contrast Adjustment ................................... 17
5-12-7. B Sub Contrast Adjustment ................................... 17
5-12-8. γ 1 Adjustment ....................................................... 17
5-12-9. γ 2 Adjustment ....................................................... 17
5-12-10. VCO Free Run Adjustment .................................... 17
5-12-11. V POS Adjustment ................................................. 17
5-12-12. H POS Adjustment................................................. 17
6. DIAGRAMS
6-1. IC Pin Description............................................................ 19
6-2. Block Diagram –Video Section–...................................... 21
6-3. Block Diagram –Display Section–................................... 22
6-4. Printed Wiring Board –LCD Section (1/2)– .................... 24
6-5. Printed Wiring Board –LCD Section (2/2)– .................... 25
6-6. Printed Wiring Board –Base Section (1/2)–..................... 26
6-7. Printed Wiring Board –Base Section (2/2)–..................... 27
6-8. Schematic Diagram –LCD Section (1/3)– ....................... 28
6-9. Schematic Diagram –LCD Section (2/3)– ....................... 29
6-10. Schematic Diagram –LCD Section (3/3)– ....................... 30
6-11. IC Block Diagrams .......................................................... 31
7. EXPLODED VIEWS
7-1. Base (1) Section ............................................................... 34
7-2. Base (2) Section ............................................................... 35
7-3. LCD Section..................................................................... 36
7-4. Connection Box Section (XA-115).................................. 37
8. ELECTRICAL PARTS LIST ....................................... 38
1. SERVICING NOTES ....................................................... 3
2. GENERAL
Location of Controls............................................................... 4
Connection diagram ............................................................... 6
3. DISASSEMBLY
3-1. Skirt (Base) ........................................................................ 8
3-2. Base Board ......................................................................... 8
3-3. SW Board ........................................................................... 9
3-4. Covers (Hinge) ................................................................... 9
3-5. LCD Block Assy .............................................................. 10
3-6. Case (LCD Rear).............................................................. 10
3-7. Chassis (LCD).................................................................. 11
3-8. LCD Board ....................................................................... 12
3-9. LCD1................................................................................ 12
4. TEST MODE .................................................................... 13
5. ELECTRICAL ADJUSTMENTS
5-1. Equipment Used ............................................................... 14
5-2. Connection of Equipment ................................................ 14
5-3. Setup for Adjustment ....................................................... 14
5-4. DC-DC Converter Adjustment ......................................... 15
5-4-1. Frequency Adjustment ............................................. 15
5-4-2. 5V Voltage Adjustment ............................................ 15
5-4-3. Other Voltage Checks............................................... 15
5-5. PLL Adjustment ............................................................... 15
5-5-1. Frequency Adjustment ............................................. 15
5-5-2. Frequency Check ..................................................... 15
5-6. Inverter High Voltage Check ............................................ 15
5-6-1. Voltage Check .......................................................... 15
5-6-2. Frequency Check ..................................................... 15
5-7. OSD Dot Clock Check ..................................................... 15
5-8. NTSC Subcarrier Check .................................................. 15
5-9. PAL Subcarrier Check...................................................... 15
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