Sony cdx r 79 l service manual

Page 2

CDX-R79L

TABLE OF CONTENTS

Title Section Page
SPECIFICATIONS .................................. 1

Notes on Chip Component Replacement ~~~~~~~~~~~ 2

Notes on Handling the Optical Pick-up Block

Of Base Unit .................................. 2
SECTION 1. GENERAL

Location of Controls ------------------------ 3
SECTION 2. SERVICING NOTES

Removing the Flat Package IC --------------- 4

Flexible Circuit Board Repairing-
Cautions for Repair ------------

Test Mode ....................
SECTION 31 CIRCUIT DESCRIPTION ..

ICl Pins (CXP5068IIADOSU) """"

IC501 Pins (CXP5048H-1880) """
SECTION 4. MECHANICAL ADJUSTMENTS """""""""" 11
SECTION 5. ELECTRICAL ADJUSTMENTS ----------- 11
SECTION 5. DIAGRAMS
6-1 Block Diagram(MD Section) ---------------- 15
5-2. Block D1agram(Ma1n Section) ------- 17
6-3. Semiconductor Lead Layouts ------------ 19
6-4. Printed Wiring Boards (MD Section) ------ 20
6-5. Schematic Diagram(MD Section) ------ 23
6-6. Circuit Boards Location ------------------ 26
5-7, Printed Wiring Boards (Main Section) ------ 27
5-8. Schematic D1agram (Main Section) ~~~~~~~~~~ 3l
6- 9. Schematic Diagram (Tuner Unit) - - ~~~~~~ 35
6- 10 1C Block Diagrams ..................... 36
6-11 waveforms ..................... 38
SECTION 7. EXPLODED VIEW ----------------------- 40
SECTION 8. ELELCTRICAL PART LIST ------------- 46
SUPPLEMENT-l
SUPPLEMEIT-Z

SERVICING NOTE

Flexible Circuit Board Repairing

0 Keep the temperature of the soldering iron around
270°C during repairing.

I Do not touch the soldering iron on the same con-
ductor of the circuit board (within 3 times).

0 Be careful not to apply force on the conductor
when soldering or unsoldering.

Notes on chip component replacement

0 Never reuse a disconnected chip component.
0 Notice that the minus side of a tantalum capacitor
may be damaged by heat.

Removing the Flat Package IC

1. Prepare an enameled wire (0 2mm diameter) and
apply it to the back side of the IC pins as illus-
trated below

Solder or fix with:adhesive tape.

2. Heat the IC pin with the soldering iron and draw
the enameled wire so that the IC pin is removed
from the pattern as illustrated.

SAFETY- RELATEIZI COMPONENT WARNINGII

COMPONENTS IDENTIFIED BY MARK A OR DOTTED
LINE WITH MARK A 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 PUB-
LISHED BY SONY.