HCD-C770/C990
36
36
7-5.
BLOCK DIAGRAM – CHANGER, POWER SUPPLY Section –
POWER CONTROL
IC901
(AC IN)
S901 (2/2)
S901 (1/2)
TH901
POWER
TRANSFORMER
T901
M301
(FAN)
D919
D920
D933
D912
VCC
D906
12V
D905, 907
RECT
D902
LINE FILTER
LF901, 902
OSC
Q912, 914
B+ SWITCH
Q001, 002
RESET SWITCH
Q901
RECT
D911
POWER
+20V
REGULATOR
Q905
POWER ON/OFF
CONTROL
Q901, 903
POWER ON/OFF
CONTROL
Q902, 906
FAN MOTOR
CONTROL
Q190, 191
+6.8V
REGULATOR
Q904
VOLTAGE
DETECT
Q992
M12V
D202, 203
U5V
S901 (1/2)
10V
D/A, A/D
+5V
LED DRIVE
Q911, 912
POWER ON/OFF
CONTROL
Q910, 911
B+ SWITCH
Q222, 223
TU 10V
B+ SWITCH
Q990, 991
M
+6.5V
(AMP +6.5V)
+32V
(AMP +32V)
B+ SWITCH
Q003, 004
LEVEL SHIFT
Q731
D5V
DA05V,
VIDEO +5V
DA03V
DSP +2.6V
FL
FL1
VFL
A3.3V
A5V, RF+5V
STREAM PROCESSOR
+5V
STREAM PROCESSOR
+3.3V
TO FLUORESCENT
INDICATOR TUBE
DC-DC
CONVERTER
T801
D3.3V
+2.5V
+1.8V
SYSTEM
CONTROLLER
+5V
D901
D900
D917
U5V
RECT
D806 – 809
OSC
Q803, 804
D900
S901 (2/2)
POWER
D812
STANDBY
STOCKER MOTOR DRIVE
IC721
CHANGER CONTROLLER
(MOTOR, SWITCH)
IC902
CHANGER CONTROLLER
(ROTARY ENCODER)
IC906
M761
(STOCKER)
M
ROLLER MOTOR DRIVE
IC711
M781
(ROLLER)
M
MODE MOTOR DRIVE
IC701
M771
(MODE)
M
DISC INSERT
DETECT SENSOR
IC751
S711 (DISC INSERT (8/12cm))
S713 (DISC IN (8/12cm))
(ON: When disc insert)
(MODE)
S714 (DISC IN (8cm))
S715 (DISC OUT)
S716 (STOCKER IN/OUT)
S717 (DISC POSITION)
S718 (STOCKING)
S711
S713
S714
S715
S716
S717
S718
OFF: When disc out from
play position
OFF: The moment disc in/out
from stocker
In the midst disc is moving
between play position and stocker,
ON: disc is play position side,
OFF: disc is stocker side
OFF: In the midst disc is moving
between play position and
stocker
(ON: Play position)
(8cm disc only)
ON: Play position
ROTARY
ENCODER
S771
(STOCKER POSITION)
ROTARY
ENCODER
S702