Chapter 5. Circuit Schematics And Parts Layout; Notes On Schematic Diagram; Types Of Transistor And Led - Sharp QT-MP5W 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 resistor.
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 symbol 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
• Schematic diagram and Wiring Side of P.W.Board
for this model are
improvement without prior notice.
REF. NO DESCRIPTION
SW701 Power On / Stand-by
SW702 Fast Reverse / Track Down /
Tuner Preset Down
SW703 Equaliser
SW704 Extra Bass
SW705 USB Play / Pause
SW706 CD Play / Pause
SW707 Tuner (Band)
SW708 Tape
SW709 Volume Up

[2] Types Of Transistor And LED

subject to change
POSITION
ON—OFF
ON—OFF
ON—OFF
ON—OFF
ON—OFF
ON—OFF
ON—OFF
ON—OFF
ON—OFF
FRONT
(3)
VIEW
(1)
E C B
(S)(G)(D)
(1)(2)(3)
A928A
9014C
S8550
S8050
9015C
FRONT
VIEW
E C B
CW7809
B1185
B772
• The indicated voltage in each section is the one
measured by Digital Multimeter between such a
section and the chassis with no signal given.
1. In the tuner section,
indicates AM
indicates FM stereo
2. In the audio section, a tape is being played back.
3. In the deck section, a tape is being played back.
( ) indicates the record state.
4. In the rectifier section, a tape is being played
back.
5. In the CD section, the CD is stopped.
• Parts marked with "
important for maintaining the safety of the set. Be
for
sure to replace these parts with specified ones for
maintaining the safety and performance of the set.
REF. NO
SW710
SW711
SW712
SW713
SW714
SW715
SW716
B
TOP
C
VIEW (2)
E
HY3C
HY4C
FRONT
VIEW
92L22708030000
92L22708050012
5 – 1
" (
DESCRIPTION
Stop
Repeat / Random
Fast Forward / Track Up /
Tuner Preset Up
Tuner Tuning Down / Folder Down
Tuner Tuning Up / Folder Up
Volume Down
Memory Display
TOP VIEW
1N4001
1N4148
QT-MP5W
) are
POSITION
ON—OFF
ON—OFF
ON—OFF
ON—OFF
ON—OFF
ON—OFF
ON—OFF