Printed Wiring Boards And Schematic Diagrams - Sony SLV-L49 Service Manual

SECTION 4

PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS

THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
• For Printed Wiring Boards.
• b: Pattern from the side which enables seeing.
• For Schematic Diagrams.
• Caution when replacing chip parts.
New parts must be attached after removal of chip.
Be careful not to heat the minus side of tantalum
capacitor, because it is damaged by the heat.
• All resistor are in ohms, 1/4 W unless otherwise noted.
Chip resistor are 1/10 W unless otherwise noted.
kΩ: 1000 Ω, M Ω, : 1000 kΩ.
• All capacitors are in µF unless otherwise noted. pF : µ
µF. 50 V or less are not indicated except for electrolytics
and tantalums.
• C: panel designation.
• : internal component.
• U : B+ Line.
• V : B– Line.
• Circled numbers refer to waveforms.
• Readings are taken with a PAL color-bar signal input.
• Voltage are dc between ground and measurement points.
• Readings are taken with a digital multimeter (DC10MΩ).
• Voltage variations may be noted due to normal production
tolerances.
When indicating parts by reference number, please
include the board name.
• Abbreviation
MX : Mexican
CS : Chilian, Bolivia, Peru
PR : Puerto Rico
VZ : Venezuelan
4-1
SLV-L49/L52/L59/L69HF/L72HF/L79HF/L89HF/X55/X66HF
MA-341 MA-341
BOARD
(VIDEO BLOCK (IC260))
!¶
1
IC260 4 REC/PB
3.6Vp-p
V !•
2
IC260 5 REC/PB
3.4Vp-p
H !ª
3
IC260 7 PB
0.4Vp-p
@º
V
4
IC260 9 REC
0.1µsec/div
50mV/div @¡
5
IC260 !º REC
480mVp-p
H
6
IC260 @™ REC
0.1µsec/div
0.5V/div
BOARD (AUDIO BLOCK (IC201))
@¡
IC201 2 REC IC201 @ª PB
H 480mVp-p H
2.3Vp-p
RF SW P
@™
IC201 7 REC IC201 (•
REC/PB
1.5Vp-p
0.1µsec/div 30Hz
0.1V/div
@£
IC201 @£ PB IC201 #¶ REC
1.0Vp-p
H H
480mVp-p
@¢
IC201 @• REC/PB IC201 ^¶ REC/PB
4.2Vp-p 3.579545MHz 460mVp-p
H
@∞
IC201 @ª REC
IC201 1 PB
0.4Vp-p
H 2.2Vp-p
4-2