Philips LX7000SA Service Manual page 29

1 2 3
TUNER BOARD ECO6
/ SYSTEMS-CENELEC
A
1101 USA
2105 USA
3
100n 1130
2
C-PAD
1
YKD21
A
FM 75 OHM
FM FRONTEND
1110
1102
T102 0V 1
B
1
MIXER
ANT
YKD31- 2
0432
GND VCC
1131
T103
2 3 4 6 5
C-PAD
C
T107
3195
100R
D
LW only
0V
3108
0V 7104
BC337-40
0.7V
2K2
P01 LW =HIGH
MW/LW-RF
E
AM FRAME AERIAL
MW
5102
1103
8 7
T105
2 T106 * 6
4101
1 5
0R
XH-S
4
7KL
*
F
B
LW
5103
3
4
2
1
6
8 7
G
VDD VDD
H
8.3V
7.5V
P0 3125
8V BC857B
P01
6.7V 7109
10K
LW=HIGH 0V
7.4V
I
marked components not for LW version
1 2 3
7B-2
4 5 6
FE450
3190
7 0V
IF-OUT 120R
8 0.1V
OSC.
OUT
9 10
3194
2K2
+FM
C
T109
3105
220R
T110
VCO
6105-1 2
1
T111
7
HN1V02H
1
1
2
3
5
6105
1 8
2 7
LW only
3 6
7105
BC337-40 4 5
0.7V HN1V02H
0.1V
AM-OSCILLATOR
P0
MW
5123
4 3
2
6 1
8 7
5122 LW
7122
0V 4 3
BC847C
0V
3128
0V 2
0.7V
2K2
6 1
8 7
4 5 6
7 8 9
AM-IF1
5111 450kHz
4
6
8 7
T115
T104 3191
120R
2128
AM/FM
10u
D
7101
TEA5762 44 43 42 41 40
2165
AM DET
100n
2V
2129
AM-IF
1 RIPPLE
AGC
100u
AM AM
0V 2
AM-RF FRONTEND MIXER
CTRL
3
FM-GND
AGC
AM
OSC
4
RF-GND1
0.1V 5 FM-OSC
PRE- MULTI-
SCALER PLEXER
0V 6 AM-OSC
RIPPLE VSTABA VSTABB
VDD
7
7.8V VCC1
VCC1
STABILIZER
8.2V
AGC
8 I-TUNE
1.6-8V
CHARGE
PUMP
1-8V
3142
9
1V VCO
3141
1.3V VCC2
56K
0.7V
10 AF-OUT
100K
2127 3135
11 MPX-IN
STEREO
1K 1.2V
220n DECODER
5115
4 6
T112
8
12 13 14 15 16
7
3 2 1
BIRDY FILTER
RDS only
VCC1
5119
4
3144 2169 MPX
1.3V
1K to 1120
2n2
3176
0.7V pin 5
BC857C
7103
6
33K
8 7
MPX
DISCRIMINATOR
BUFFER AMPLIFIER
0V
0.7V
3137 P0
7124
BC847C
0.1V 22K
MW=HIGH
7 8 9
LEGEND
* ... only assembled in FM/AM-version SMD jumper
p ...for provision only
41xx
USA ... for USA version only
0R
LW ... for LW version only
7B-2
10 11 12
3
T113
2
2150
1
AM-IF2
100n 5112 450kHz
3 4
T114
2
1 6
FM-IF1 FM-IF2
7 8
7P
5109 5110
1 3 1 3
I O I O
AM-AFC
450kHz
5114
G 2 G 2
3 4
2
1 6
39 38 37 36 35 34
7 8
7P
1.2V
0.7V
FM-IF2-IN 33
P1
FM
IF1
32
AM-AFC
1.4V
P0
31
AM FM P1 7.5V
IF IF2
30 7.5V
P0
AGC
0.1V
CONTROL
WRITE-EN 29 0V
0V
28
DATA
AGC
0V
27
CLOCK
2166
AM 3169
DET 26
DIG-GND
150K
1n
5121
FM 2167
25 1.4V
XTAL
DET
OSC
12p
DT-381 75 kHz
stereo 0.2V
MONO/ 24
STEREO mono 4.8V
23
VDD
8.2V
AFC
VCC2 8.3V
7.5V
VDD
17 18 19 20 21 22
T140 3168 3167
7.8V
VCC1
8.2V 120R 120R
8.2V
VCC2
470n
11V
VCC2
2164
12V
2
7112
BC547C
T118 3155
8.2V
VDD
3
8.3V 150R
2 7.5V
1
8.9V
8.9V
+FM
8.2V
AM/FM
from 7101/39
10 11 12
...V FM mode stereo Signal path
...V MW mode
FM
AM
EVM
V ...V LW mode
MPX (Audio Frequency)
voltages measured while
AF - left/right
set is tuned to a strong transmitter
13 14
1101 A2
1102 B1
1103 E2
1110 B2
VERSION PROGRAMMING COMPONENTS
1120 E14
1130 A2
1131 C2
VERSION
1132 F13
6120 3156 3157 3170 7111
2102 B1
A
2105 A2
/00 /02 FM/MW/LW
2106 E3
2107 E4
/00 /02 FM/MW
2108 G3
2109 G3
2118 H6
/01 FM/MW
2119 H6
2120 H6
/14 FM-OIRT/MW
2122 I6
2123 H6
2124 H6
/17 FM/AM
2125 H6
B
2127 E7
component mounted
2128 B8
2129 C7
2130 F11
2131 F8
2132 F8
2133 F8
VERSION DETECTION
2134 I8
2135 I9
6120
P1 2136 H14
2137 H13
BAS216 C 2138 F9
2139 G9
2140 G9
0.2V
2141 F10
2143 G12
0V 7111
2144 G11
BC847C
2145 E11
2146 E12
2147 E12
2148 E12
2149 H7
2150 A10
3161
D
2159 D5
22K 2161 C11
3160
2162 H12
2163 D11
470R
2164 G10
3159
152kHz, 50mV pp 2165 C7
5V
2166 E11
470R
2167 E11
2169 G8
0V
2180 C4
stereo mono stereo
2190 C3
2191 C3
3 E
3105 D5
stereo 0.4V
3108 D2
mono 4.8V
3109 G4
1120
3123 H3
T123
3158
STEREO
3125 H2
T122 8
470R 3128 H3
0V
CLOCK
3130 I9
T121 7
0V DATA 3131 I9
6 3132 G4
T120
from 0V
ENABLE/MPX
3134 H6
MPX
2169
5
T127 3135 E7
12Vtyp
VCC
F 3137 H7
(10-14V)
4
T126
RIGHT 3141 E7
3142 E6
T125 3
GND
3143 G7
2
3144 G8
LEFT
3145 F8
1
T117 3154
3146 G13
FE-BT-VK-N
3150 H12
330R
3151 H12
T124 3152 G14
4
3153 G13
9.6V 3154 F13
G
3155 G12
3156 C12
3157 D12
3158 E13
3159 D13
3160 D13
3161 D13
3167 F12
3168 F11
3169 E11
3170 D12
3171 G12
H
3172 G12
3176 H7
3180 I3
3190 B6
3191 B7
3192 B6
3193 B4
3194 C4
3195 C3
4101 E2
4102 F3
I 4104 H5
5102 E3
5103 F2
5109 B9
5110 B10
5111 A9
5112 A11
5114 B11
5115 E7
ECO6 Sys-Cenelec, 010517
5118 G9
5119 G9
13 14
5121 E11
5122 H5
5123 G5
6105-1 E4
6105-2 G6
6106 D4
6107 G13
6120 C13
7101 C8
7103 H8
7104 D2
7105 F4
7109 H3
7110 H12
7111 C13
7112 G12
7122 H4
7124 H7
T102 B2
T103 B2
T104 B6
T105 E2
T106 E2
T107 C3
T109 D5
T110 D5
T111 E5
T112 F7
T113 A9
T114 B11
T116 F10
T117 F13
T118 G11
T120 F13
T121 F13
T122 E13
T123 E13
T124 G14
T125 F14
T126 F13
T127 F13
T140 F11
T141 F10
T142 F10