Sony HCD-EP303 Service Manual page 20

HCD-EP303
DISPLAY/POWER Section
SW601 - 615, 621, 622
IC602
KEY CONTROL
DATA
2
Q1
4 - 7,
H X
AMP SECTION ı
CLOCK 14 -12
Q7
3
IC601 (3/3)
SYSTEM CONTROLLER,
LIQUID CRYSTAL DISPLAY DRIVER
KEY R0
KEY MATRIX
64-67 ı
KEY R3
D611 - 615
CPU RESET
SW600
Z PUSH
OPEN/CLOSE
53
DPSW2/SLEND
TIMER STATUS
SURROUND
12/24H SELECT
REM601
44 REMOTE
REMOTE CONTROL 1
RECEIVER
58 X1
X602
6MHz
59 X2
S0
69-80,
ı
1 -20
S31
LD621
LIQUID
CRYSTAL
DISPLAY
COM0
ı 21-24
COM3
CD 8V
Q310,311
CD 31
REGULATOR
CONTROL SWITCH
Q116
TUNER +9V
B+ SWITCH
TUNER 29
D1 - D3
(LCD BACK LIGHT)
IC603
68 RESET SIGNAL
GENERATOR
PSW 51
D619
TIMER
D607
32
D608
Q602
35
SWITCH
D603
63
D618
Q603
SWITCH
SW301
D648
Q604
(AM FREQ STEP)
6V SWITCH
10kHz
9kHz
20 20
DC_12V
Q308, 309
D405 – 408
+8V
RECT
REGULATOR
D317
Q313
9V +9V
REGULATOR
D307
IC301
DC_15V
(POWER AMP)
6V
Q312
D401 – 404
+6V
RECT
REGULATOR
D308
D311
Q401,402
POWER ON/OFF
RELAY DRIVE
D310
ZD401
D411 – 414
+6V
RECT
REGULATOR
X E
TUNER SECTION
MUTE
X G
AMP SECTION
PLLCE
X F
TUNER SECTION
TR401
POWER
TRANSFORMER
(MAIN)
RL401
TR402
POWER
TRANSFORMER
(SUB)
AC IN