Philips LX7000SA Service Manual page 30

1101 B5 1110 B4 1131 C5 2107 B3 2133 C1 2162 A4 5102 C4
1102 B5 1120 A4 1132 A4 2128 A3 2138 B1 2191 B4 5103 C4
1103 C5 1130 A5 2106 B4 2129 B3 2144 B1 3142 C2 5109 B3
TUNER BOARD ECO6 Systems - Cenelec /
Birdy Filter
2102 B1 2120 C3 2130 B3 2137 A3 2146 B5 2161 A4 2169 A3
2105 B1 2122 C3 2131 C4 2139 B4 2147 A5 2163 A4 2180 B2
2108 C1 2123 C3 2132 C4 2140 B4 2148 B4 2164 B4 2190 B2
2109 C1 2124 C3 2134 C5 2141 B5 2149 C4 2165 B3 3105 B3
2118 C3 2125 C3 2135 C5 2143 B5 2150 B3 2166 B5 3108 C2
2119 C3 2127 C4 2136 A3 2145 B5 2159 B3 2167 B4 3109 C1
TUNER BOARD ECO6 Systems - Cenelec /
4 3
1 7
2 8
A
1
+FM
D
C
8
1
These assembly drawings show a summary of all possible versions.
For components used in a specific version see schematic diagram respectively partslist.
7B-3
5110 A2 5114 A2 5121 B2 7104 C4 9101 A2 9104 B1 9107 B4
5111 A3 5115 C2 5122 C3 7105 C5 9102 B2 9105 B1 9108 B3
5112 A2 5119 B2 5123 C3 7112 B1 9103 A1 9106 B1 9109 C2
componentside view
ECO6 Sys-Cenelec, layout stage .6, 160501
3123 A5 3134 C3 3145 C4 3154 B5 3160 A3 3171 B5 3192 A2
3125 A5 3135 C4 3146 B5 3155 B5 3161 A4 3172 B5 3193 B2
3128 C2 3137 C4 3150 B3 3156 A4 3167 A5 3176 C4 3194 B2
3130 C4 3141 B3 3151 A2 3157 A4 3168 C5 3180 A5 3195 B2
3131 C4 3143 C5 3152 A3 3158 A3 3169 B4 3190 B2 4101 C2
3132 B3 3144 A5 3153 A3 3159 A3 3170 A4 3191 A3 4102 C2
copperside view
V dd
Vcc2
Vcc1
ECO6 Sys-Cenelec, layout stage .6, 160501
5 2
9110 A4
TUNER ADJUSTMENT TABLE
9111 A3
Waverange
VARICAP ALIGNMENT
FM
87.5 - 108MHz
A
(50kHz grid)
MW
531 - 1602kHz
(9kHz grid)
LW
FM 75Ω
153 - 279kHz
(3kHz grid)
FM - IF
FM
AM FRAME AERIAL
FM - VCO
B
FM
FM RF (channel separation)
4104 C3 6106 B2 7110 B2
4105 B2 6107 B5 7111 A4
4106 B3 6120 A4 7122 C3
4107 C4 7101 B4 7124 C3
FM
5118 C4 7103 C5
6105 B2 7109 A5
AM IF
MW
K
AM AFC
A
MW
C
3)
AM RF
B E
SMD jumper
MW
41..
(not all items shown
in schematic diagram)
LW
Use Service Testprogram. By selecting the TUNER TEST test frequencies will be stored as preset frequencies automatically.
1)
If sensitivity of frequency counter is too low adjust to max. channel separation
(input signal: stereo left 90% + 9%, adjust output on right channel to minimum)
2)
RC network serves for damping the IF-filter while adjusting the other one.
3)
For AM RF adjustments the original frame antenna has to be used!
MW has to be aligned before LW.
Repeat
7B-3
( ECO6 Cenelec FM/MW - and FM/MW/LW - versions with AM-frame aerial )
Input frequency Input Tuned to
108MHz
87.5MHz
1602kHz
531kHz
279kHz
153kHz
IC 7101
21
10.7MHz, 45mV
D
continuous wave
shortcircuit
2141
to block AFC
98MHz, 1mV
A 98MHz
continuous wave
Note: The FM-frontend unit has already been adjusted by the factory
and needs therefore no further adjustments for service purposes.
98MHz, 1mV
90% Left + 9% pilot A 98MHz
mod=1kHz
IC 7101
36
C
100nF
∆f = ±10kHz
450kHz
V = 0.5mV
IC 7101
RF 40
(as low as
100nF
connect pin 6 of
possible)
see
IC 7101 (AM Osc.) remark 2)
with 3.3kΩ to Vcc
C
continuous wave
V = 2mV
RF
1494kHz 1494kHz
B
558kHz 558kHz
∆f = ±30kHz
198kHz V as low as 198kHz
RF
possible
Adjust Output Scope/Voltmeter
8V ±1.2V
check
1.6V ±0.5V
check
8V ±0.2V
3-band
5123
6.9V ±0.2V
2-band
1
1.1V ±0.4V
check
8V ±0.2V
5122
1.1V ±0.4V
check
0mV ±3mV
5119 2
152kHz ±1kHz
1)
3142 3
IF coil
inside
4 right channel min.
FM frontend
1110
5111
5
5112
f
o
symmetric
0mV ±2mV
5114 2
2106
5102
5
f
5103 o
symmetric
ECO6 Sys Cenelec, 190599