CIRCUIT
6
SECTION 3.
CIRCUIT OPERATION PRINCIPLES
1. OUTLINE
The part that supply DV VOLTAGE to each circuit change AC input voltage into DC voltage. It is based on
SMPS(switching mode power supply) system which is located on main PCB. SMPS module is composed of the
switching circuit and the transformer of the primary part and the recitifier circuit of the secondary part.
2. NAME AND OPERATION OF PINS ON SMPS MODULE
1) Primary Part
2) Secondary Part
3-1. P
OWER
C
IRCUIT
PIN NO
NAME
FUNCTION
1
AC INPUT
SUPPLY AC INPUT VOLTAGE
2
PIN NO
NAME
FUNCTION
1
+37V
TURN VOLTAGE OF
TUNER (33V)
2
(F+4.5V)
F/L DISPLAY FILAMENT
VOLTAGE SUPPLY
3
(F-GND)
F/L DISPLAY DRIVE
VOLTAGE SUPPLY
4
–27V
F/L DISPLAY DRIVE
VOLTAGE SUPPLY
5
GND
SECONDARY GND
6
GND
SECONDARY GND
7
GND
SECONDARY GND
8
6V
EVER 5V, ON/OFF 5V
9
12.4V
CAP MOT, DRUM MOT (12V)
LOADING MOT (12V)
Summary of Contents for DV-K*84W Series
Page 71: ...CIRCUIT DIAGRAMS 68 SECTION 9 CIRCUIT DIAGRAM 9 1 CONNECTION DIAGRAM DV K884W K484W K284W...
Page 72: ...CIRCUIT DIAGRAMS 69 9 2 POWER CIRCUIT DIAGRAM DV K884W K484W K284W...
Page 73: ...CIRCUIT DIAGRAMS 70 9 3 SYSCON AND LOGIC CIRCUIT DIAGRAM...
Page 74: ...CIRCUIT DIAGRAMS 71 9 4 PIF CIRCUIT DIAGRAM DV K884W K484W K284W...
Page 75: ...CIRCUIT DIAGRAMS 72 9 5 IF MPX MODULE CIRCUIT DIAGRAM DV K884W K484W K284W...
Page 76: ...CIRCUIT DIAGRAMS 73 9 6 VIDEO AUDIO CIRCUIT DIAGRAM DV K884W K484W K284W...
Page 77: ...CIRCUIT DIAGRAMS 74 9 7 Hi Fi PRE AMP CIRCUIT DIAGRAM DV K884W K484W K284W...
Page 78: ...DISASSEMBLY 79 SECTION 11 DISASSEMBLY 11 1 PACKING ASS Y...
