Key Board Circuit Diagram - Philips AZ 2048 Service Manual

KEY BOARD - CIRCUIT DIAGRAM
1257 A7 1702 E9 1706 E4 1710 D4
1258 A8 1703 E6 1707 E3 1711 D4
1700 D9 1704 E5 1708 D6 1712 D3
1701 D1 1705 E4 1709 D5 1713 D2
1 2
+RC-KEY
&
3720
100R
A
7700
TSOP2236
2702
47u
16
PIN
B
GND-KEY
C
1721 1720
SOURCE
1 1
2 2
1719
3 3
EVQ11
GND-KEY
4 4
FE-BT-VK-N FE-ST-VK-N
D
1701
EVQ11
POWER_ON_OFF
E
1 2
6 - 1
1714 D6 1718 D3 2700 E8 2704 E7
1715 D5 1719 D1 2701 E8 3700 E6
1716 D4 1720 C2 2702 B2 3701 E5
1717 D4 1721 C1 2703 B4 3702 E4
3 4
Remote Control Sensor
F710
VS 2
CTRL
INP
CIRCUIT (30k) 3722
3.6V
OUT 1
10K
BAND
#
AGC DEM
2703
PASS 3721
GND 3 56K 1n
GND-KEY
DBB BAND PRESET -
3713 3712 3711
1K 680R 470R
1718 1717
EVQ11 EVQ11
SW_A
SW_B
GND-KEY GND-KEY GND-KEY
BASS - MID - TREBLE - TUNE DOWN
3708 3707 3706
1K 680R 470R
1713 1712
1711
EVQ11 EVQ11
EVQ11
GND-KEY GND-KEY GND-KEY GND-KEY
BASS + MID + TREBLE +
3703 3702
680R 470R
1707
1706
EVQ11
EVQ11
GND-KEY GND-KEY GND-KEY
3 4
3703 E3 3707 D3 3711 C4 3715 E8 3719 D9
3704 D6 3708 D3 3712 C3 3716 D8 3720 A2
3705 D5 3709 C6 3713 C3 3717 E7 3721 B4
3706 D4 3710 C5 3714 D7 3718 E9 3722 B4
5 6
RC5
3723
82K
CD STOP PRESET +
3710 3709
330R 330R
1716 1715 1714
EVQ11
EVQ11 EVQ11
GND-KEY GND-KEY
CD PLAY TUNE UP
3705 3704
330R 330R
1709
1710
1708
EVQ11
EVQ11 EVQ11
SW_A
GND-KEY GND-KEY
PROGRAM CD MODE
3701 3700
330R 330R
1705
1703
1704
EVQ11 EVQ11
EVQ11
GND-KEY GND-KEY
5 6
6 - 1
3723 B4 F702 C9 F706 C9 F710 A3
7700 A2 F703 C9 F707 D9
F700 C9 F704 C9 F708 D9
F701 C9 F705 C9 F709 D9
7 8 9
# #
1257 1258
C-PAD C-PAD
GND-ESD
3.5V
F701
3.5V
3.5V
F703
3.3V
+C-KEY
F705
3.5V
3.5V
3.2V
RC5
F709
+RC-KEY
F707
+C-KEY +C-KEY
GND-KEY
3719
#
1K
3716
3714
2K2 1K
3718
SW_B
1K
1702
EC16 1
#
2704 3717 3715 2700 2701
10n 10n
10n 100R
22K
MT1 MT2
4 5 3
GND-KEY GND-KEY GND-KEY GND-KEY GND-KEY GND-KEY
7 8 9
10
A
B
To
COMBI BOARD
FE-ST-VK-N
F700
KEY_1
10
KEY_2
9
F702
KEY_3
C
8
POWER_ON_OFF_KEY
7
F704
+C
6
ROTARY_1
5
F706
ROTARY_2
F708 4
RC5
3
+RC-KEY
2
DGND
D
1
1700
2 Rotary Encoder
E
10