Schematic Diagram Display Section - Sony HCD-EP303 Service Manual

HCD-EP303

6-9. Schematic Diagram DISPLAY Section

DISPLAY BOARD
TIMER
SEL2215S-CD
2.7k
A
MAIN
BOARD
(1/2)
CN101
(Page 22)
1N4148
0.1
1 : D648, Q604, R668
US, CND model
2 :D618, Q603, R666
EXCEPT AEP,UK model
3 :D603
EXCEPT AEP,UK model
• See page 17 for Waveforms.
LD621
LIQUID CRYSTAL DISPLAY
COM0
COM1
COM2
COM3
4.7
BIAS
4.7
VLC0 IC601
3.1
VLC1
1.6
SYSTEM CONTROLLER
VLC2
<9.7>0.1
LIQUID CRYSTAL DISPLAY DRIVER
TUNER
3.9
TAPE
<0>1.4 IC601
CD UPD753016AGC
<4.7>4.3
TIMER STATUS
VSS CPU RESET
5.4
CD RESET KEY R3
<4.6>4.3
SURROUND KEY R2
0
PLL CL
KEY R1
5.3 3
PLL DI KEY R0
<0.1>5.3
TUNER SD 12/24H SELECT
4.7
CLOCK
5.3
DATA
6MHz
0.1
0
4.6 0
2SC945
0.5
1N4148
0
SC945
SC945TR
0.6
0
2
2SA733
1N4148
0
0
4.7k
<4.5>
1
0
1.8k
2.2k
Q601,602
BUFFER
Q603,604
SWITCH
1.8k
0.1
C MAIN BOARD (2/2)
CN302
(Page 23)
IC603
RESET SIGNAL
GENERATOR
S11
S10
S9
2.3
PST529D
S8
2.3
5.2 5.3
S7
O I
2.3
G
S6
2.3
S5
2.3
S4
2.3
S3
2.3
0.022
S2
10
2.3
S1 16V
2.3
S0
5.3
5.2
5.2
5.2
5.2
4.3
5.2
NC
0.9<4.6>
CD
DATA
20p
18p
1N4148
1N4148
0.1 3
0.6
REM601 22
5.2 10V
5.2
REM601
REMOTE CONTROL
RECEIVER
0.1
0.1
D MAIN BOARD (2/2)
CN204
(Page 23)
26 26
I/
TAPE TUNER
CD
VOLUME +
MUSIC MENU
VOLUME -
REPEAT
MEGA BASS
PRESET - PRESET + TUNER MEM
SHUFFLE
TUNING -
TUNING +
1N4148 1N4148 1N4148 1N4148
1N4148
5.3
5.3
5.3 5.3
5.3 TC4094BF 5.3
4.7 5.3
5.3 5.4
5.4 5.4
IC602
KEY CONTROL
0.1
LED BOARD
(LCD BACK LIGHT)
1N4148
1N4148