CFD-G550CP - Sony Audio Service Manual (repair manual). Page 3

3

Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size.)

Unleaded solder has the following characteristics.
• Unleaded solder melts at a temperature about 40

°C higher than

ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350

°C.

Caution: The printed pattern (copper foil) may peel away if
the heated tip is applied for too long, so be careful!

• Strong viscosity

Unleaded solder is more viscous (sticky, less prone to flow)
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.

• Usable with ordinary solder

It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.

......................................................... 4

............................................................................ 5

3-1.   Cabinet (Upper) (1) Section ................................................ 9
3-2.   Cabinet (Upper) (2) Section ................................................ 9
3-3.   Cabinet (Front) Section ..................................................... 10
3-4.   Control 2 Board, VOL Board ............................................ 10
3-5.   LCD Board ........................................................................ 11
3-6.   Power Board, Trans Board ................................................ 11
3-7.   Control 1 Board ................................................................. 12
3-8.   H/P Board, TU Board ........................................................ 12
3-9.   Main Board ....................................................................... 13
3-10. CD Block Section .............................................................. 13
3-11. Optical Pick-up ................................................................. 14
3-12. Tape Mechanism Deck ...................................................... 14
3-13. TC Board ........................................................................... 15
3-14. Main Belt, Sub Belt ........................................................... 15

............................... 16

Tape Section .......................................................................... 16
Tuner Section ......................................................................... 17
CD Section ............................................................................ 18

6-1.   Block Diagram – CD Section – ......................................... 19
6-2.   Block Diagram – Main Section – ...................................... 20
6-3.   Note for Printed Wiring Boards and
         Schematic Diagrams .......................................................... 21
6-4.   Waveforms ......................................................................... 21
6-5.   Circuit Boards Location .................................................... 21
6-6.   Printed Wiring Board – CD Section – ............................... 22
6-7.   Schematic Diagram – CD Section – .................................. 23
6-8.   Printed Wiring Board – Tuner Section – ........................... 24
6-9.   Schematic Diagram – Tuner Section – .............................. 25
6-10. Schematic Diagram – Main Section (1/2) – ...................... 26
6-11. Schematic Diagram – Main Section (2/2) – ...................... 27
6-12. Printed Wiring Boards – Main Section – .......................... 28
6-13. Printed Wiring Board – TC Section – ............................... 29
6-14. Schematic Diagram – TC Section – .................................. 30
6-15. Schematic Diagram – Control Section – ........................... 31
6-16. Printed Wiring Boards – Control Section – ....................... 32
6-17. Printed Wiring Boards – Power Section – ......................... 33
6-18. Schematic Diagram – Power Section – ............................. 34

7-1.   Overall Section .................................................................. 42
7-2.   Cabinet (Front) Section ..................................................... 43
7-3.   Cabinet (Rear) Section ...................................................... 44
7-4.   Cabinet (Upper) (1) Section .............................................. 45
7-5.   Cabinet (Upper) (2) Section .............................................. 46
7-6.   Tape Mechanism Section .................................................. 47
7-7.   CD Mechanism Section .................................................... 48

......................................... 49