Schematic Diagram - Display Section - Sony HCD-EP505 Service Manual

6-15. SCHEMATIC DIAGRAM – DISPLAY Section – •
DISPLAY BOARD
(AEP, UK) (EXCEPT AEP, UK)
SW305 SW305
PLAY MODE PLAY MODE
RDS/DIR DIR
CD
TUNER MEM/ENTER TUNER MEM/ENTER
SEL2215S-CD
MUSIC MENU
TIMER
4
0
LED DRIVE
0
0
10V
4.8
A0 VCC
A1 TEST
4.8
A2 SCL
4.8
A3 SDA
IC302
Q306
4.8
RESET
50V
SWITCH
0
0
ROTARY
ENCODER
VOLUME
∗
∗
4.2
∗
4.2 BUFFER
SWITCHING
(AEP, UK)
See page 19 for Waveforms. • See page 33 for IC Block Diagram.
TUNER/BAND
TAPE
PRESET + PRESET −
DISPLAY
TUNING + TUNING −
MEGA BASS
3
33p
4.8
5.8
50V
GND
IC304
RESET SIGNAL
GENERATOR
5.2
IN
100U10V
X302
GND
5.4
REMOTE CONTROL
OUT
RECEIVER
RPM7138-V4
IC305
2
QUAL RCLK
RDS DECODER
∗ 4
RDAT NC
2.1 2
VREF XO
50V
2.1
1.5
MUX XI
4 4
VDD1 VDD2
VSS1 VSS2
0
VSS3 T1
10V
CMP T2
2.1
IC B/D
37 36 35 34 33 32 31 30 29 28 27 26
Q307, 308
AM FREQUENCY STEP
SELECT SWITCH
(EXCEPT US, CND)
(AEP, UK, HK, CH)
(AEP, UK, HK, CH)
J306 0
Q308
(US, CND, E51, MX, AR)
608N
Q307
D304 (HK)
536N
1N4148
(AEP, UK, CH)
4.1
(0)
<4.1>
4.3
(4.3)
<0>
4.8
5.4
4.8
2.5
2.3
4.8
IC301
4.8
SYSTEM CONTROLLER,
5.4
LIQUID CRYSTAL
5.4
DISPLAY DRIVER
2 (0)
4.8 µPD780306GC-A68-8EU
4.9
0
0 (4.8)
0
4.8 (0)
0
4.9
4.8
0
4.9
4.9
4.9
6.3V
11 9 1 11
SW300
PUSH
A F B
MAIN BOARD MAIN BOARD MAIN BOARD
OPEN/CLOSE
CN305 CN305 CN303
(AEP, UK, CH) (EXCEPT AEP, UK, CH) (AEP, UK, CH)
(Page 21) (Page 25) (Page 21)
29 29
CN301
LIQUID CRYSTAL DISPLAY
25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
(HK)
R375
47K
(US, CND, E51, MX, AR)
R374 47K
2.4
SEL2910D SEL2910D SEL2910D
D901 − 903
LCD BACK LIGHT
2.4
1.6
3.2
0
4.8
4.8
2.4
2.4
SEL2215S-CD
<4.3>
{0.2}
7
<0> {0.7}
(Page
LED
22)
(Page
26)
(EXCEPT AEP, UK, CH)
1
G
MAIN BOARD
CN303
(EXCEPT AEP, UK, CH)
• Voltages and waveforms are dc with respect to ground
(Page 25)
under no-signal (detuned) conditions.
no mark : TUNER
(
<
∗
HCD-EP505
Ver 1.1
1 3 1
D C (Page
22)
MAIN BOARD MAIN BOARD
CN302 CN307
( AEP, UK, CH) ( AEP, UK, CH)
I H (Page
26)
MAIN BOARD MAIN BOARD
CN302 CN307
(EXCEPT AEP, UK, CH)
) : CD PLAY
> : TAPE PLAY
: Impossible to measure