SONY SCTID10
Service Manual

TABLE OF CONTENTS
Specifications ........................................................................... 1

SAFETY CHECK-OUT (US model)
After correcting the original service problem, perform the following safety check before releasing the set to the customer : Check the antenna terminals, metal trim, �metallized� knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below.

1. GENERAL
Location and Function of Controls .................................... 3

2. DISASSEMBLY
2-1. Key Board, Cabinet (Upper) Assy Removal .............. 2-2. Main Board, Transformer Board, Transformer retainer Board, Battery Blind Board Removal ........... 2-3. Cabinet (Top) Removal .............................................. Installation Power Cord .............................................. 7 LEAKAGE TEST 7 8 8 The AC leakage from any exposed metal part to earth ground and from all exposed metal parts to any exposed metal part having a return to chassis, must not exceed 0.5mA (500 microampers). Leakage current can be measured by any one of three methods. 1. A commercial leakage tester, such as the Simpson 229 or RCA WT-540A. Follow the manufacturers� instructions to use these instruments. 2. A battery-operated AC milliammeter. The Data Precision 245 digital multimeter is suitable for this job. 3. Measuring the voltage drop across a resistor by means of a VOM or battery-operated AC voltmeter. The �limit� indication is 0.75V, so analog meters must have an accurate low-voltage scale. The Simpson 250 and Sanwa SH-63Trd are examples of a passive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2V AC range are suitable. (See Fig. A)
To Exposed Metal Parts on Set

3. DIAL POINTER INSTALLATION ............................ 9 4. TEST MODE ................................................................. 10 5. ELECTRICAL ADJUSTMENTS ............................ 11 6. DIAGRAMS
6-1. Explanation of IC Terminals ..................................... 6-2. Block Diagram .......................................................... 6-3. Printed Wiring Boards (Main Section) ..................... 6-4. Schematic Diagram (Main Section) ......................... 6-5. Printed Wiring Boards (Key Section) ....................... 6-6. Schematic Diagram (Key Section) ........................... 12 13 15 17 19 21

7. EXPLODED VIEWS
7-1. Base Unit Section ..................................................... 24 7-2. Handset Section ........................................................ 25

8. ELECTRICAL PARTS LIST .................................... 26

0.15 µF

1.5k�

AC voltmeter (0.75V)

Earth Ground Fig. A. Using an AC voltmeter to check AC leakage.

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. � HOW TO CHANGE THE CERAMIC FILTER This model is used two ceramic filters of CF3 and CF1. You must use same type of color marked ceramic filters in order to meet same specifications. Therefore, the ceramic filter must change two pieces together since it�s supply two pieces in package as a spare parts.
mark mark

SAFETY-RELATED COMPONENT WARNING!! COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH MARK ! 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 � LA S�CURIT�! LES COMPOSANTS IDENTIFI�S PAR UNE MARQUE ! SUR LES DIAGRAMMES SCH�MATIQUES ET LA LISTE DES PI�CES SONT CRITIQUES POUR LA S�CURIT� DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PI�CES SONY DONT LES NUM�ROS SONT DONN�S DANS CE MANUEL OU DANS LES SUPPL�MENTS PUBLI�S PAR SONY.

Mark red blue orange black white

Center frequency 10.70MHz 10.67MHz 10.73MHz 10.64MHz 10.76MHz

CF3

CF1

�2�