Chapter 5. Circuit Schematics And Parts; Notes On Schematic Diagram; Types Of Transistor And Led - Sharp XL-UH4H Service Manual

CHAPTER 5. CIRCUIT SCHEMATICS AND PARTS LAYOUT

[1] Notes On Schematic Diagram

• Resistor:
To differentiate the units of resistors, such symbol as K and M are
used: the symbol K means 1000 ohm and the symbol M means
1000 kohm and the resistor without any symbol is ohm-type resis-
tor. Besides, the one with "Fusible" is a fuse type.
• Capacitor:
To indicate the unit of capacitor, a symbol P is used: this symbol P
means pico-farad and the unit of the capacitor without such a sym-
bol is microfarad. As to electrolytic capacitor, the expression
"capacitance/withstand voltage is used".
(CH), (TH), (RH), (UJ): Temperature compensation
(ML): Mylar type
(P.P.): Polypropylene type
REF. NO DESCRIPTION
SW701 DISC4
SW702 DISC5
SW703 OPEN/CLOSE
SW704 DISC1
SW705 DISC2
SW706 DISC3
SW707 POWER ON/STAND-BY
SW708 PLAY/PAUSE
SW709 STOP
SW710 VIDEO/AUX/USB
SW711 TUNER (BAND)
SW712 CD
VR701 VOLUME

[2] Types Of Transistor And LED

FRONT
VIEW
E C B
(S)(G)(D)
(1)(2)(3)
A928A
B764
9015C
9014C
S8550
S8050
POSITION
ON—OFF
ON—OFF
ON—OFF
ON—OFF
ON—OFF
ON—OFF
ON—OFF
ON—OFF
ON—OFF
ON—OFF
ON—OFF
ON—OFF
MAX —MIN
B
(3)
TOP C
VIEW (2)
E
(1)
HY3C
HY4C
FRONT
VIEW
E C B
SD1936
5 – 1
• Schematic diagram and Wiring Side of P.W.Board for this model are
subject to change for improvement without prior notice.
• The indicated voltage in each section is the one measured by Digi-
tal Multimeter between such a section and the chassis with no sig-
nal given.
1. In the tuner section,
indicates AM
indicates FM stereo
2. In the CD section, the CD is stopped.
• Parts marked with " " (
taining the safety of the set. Be sure to replace these parts with
specified ones for maintaining the safety and performance of the
set.
TOP VIEW
1N4001
1N4148
1N5401
FRONT
VIEW
92L22708050021
92L22708050001
XL-UH4H
) are important for main-