Layout Diagram; Tuner Adjustment Table - Philips MCM390 Service Manual

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LAYOUT DIAGRAM - ECO6 SYSTEM CENELEC BOARD
1101 B5 1110 B4 1131 C5 2107 B3 2133 C1 2162 A4 5102 C4 5110 A2
1102 B5 1120 A4 1132 A4 2128 A3 2138 B1 2191 B4 5103 C4 5111 A3
1103 C5 1130 A5 2106 B4 2129 B3 2144 B1 3142 C2 5109 B3 5112 A2
TUNER BOARD ECO6 Systems - Cenelec /
Birdy Filter
2102 B1 2120 C3 2130 B3 2137 A3 2146 B5 2161 A4 2169 A3 3125 A5
2105 B1 2122 C3 2131 C4 2139 B4 2147 A5 2163 A4 2190 B2 3128 C2
2108 C1 2123 C3 2132 C4 2140 B4 2148 B4 2164 B4 3105 B3 3132 B3
2109 C1 2124 C3 2134 C4 2141 B5 2149 C4 2165 B3 3108 C2 3134 C3
2118 C3 2125 C3 2135 C5 2143 B5 2150 B3 2166 B5 3109 C1 3137 C4
2119 C3 2127 C4 2136 A3 2145 B5 2159 B3 2167 B4 3123 A5 3141 B3
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.
8 - 2
5114 A2 5121 B2 7104 C4 9101 A2 9104 B1 9107 B4 9110 A4
5115 C2 5122 C3 7105 C5 9102 B2 9105 B1 9108 B3 9111 A3
5119 B2 5123 C3 7112 B1 9103 A1 9106 B1 9109 C2
componentside view
A
FM 75½
AM FRAME AERIAL
B
ECO6 Sys-Cenelec, layout stage .5, 080900
3143 C5 3152 A3 3158 A3 3169 B4 3190 B2 4101 C2 6105 B2 7109 A5
3144 A5 3153 A3 3159 A3 3170 A4 3191 A3 4102 C2 6106 B2 7110 B2
3145 C4 3154 B5 3160 A3 3171 B5 3192 A2 4104 C3 6107 B5 7111 A4
3146 B5 3155 B5 3161 A4 3172 B5 3193 B2 4105 B2 6120 A4 7122 C3
3150 B3 3156 A4 3167 A5 3176 C4 3194 B2 4106 B3 7101 B4 7124 C3
3151 A2 3157 A4 3168 C5 3180 A5 3195 B2 4107 C4 7103 C5
copperside view
K
A
C
V dd
B E
SMD jumper
41..
(not all items shown
in schematic diagram)
Vcc2
Vcc1
ECO6 Sys-Cenelec, layout stage .5, 080900
5 2
( ECO6 Cenelec FM/MW - and FM/MW/LW - versions with AM-frame aerial )

TUNER ADJUSTMENT TABLE

Waverange Input frequency Input
VARICAP ALIGNMENT
FM
87.5 - 108MHz
(50kHz grid)
MW
531 - 1602kHz
(9kHz grid)
LW
153 - 279kHz
(3kHz grid)
FM - IF
10.7MHz, 45mV
D
FM
continuous wave
FM - VCO
98MHz, 1mV
A
FM
continuous wave
Note: The FM-frontend unit has already been adjusted by the factory
FM RF (channel separation)
and needs therefore no further adjustments for service purposes.
98MHz, 1mV
A
90% Left + 9% pilot
FM
mod=1kHz
AM IF
C
Df = ±10kHz
450kHz
MW
V = 0.5mV
RF
(as low as
connect pin 6 of
possible)
IC 7101 (AM Osc.)
with 3.3k½ to Vcc
C
AM AFC
MW
continuous wave
V = 2mV
RF
3)
AM RF
1494kHz
B
MW
558kHz
Df = ±30kHz
198kHz V as low as
LW
RF
possible
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
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8 - 2
Tuned to Adjust Output Scope/Voltmeter
108MHz check 8V ±1.2V
87.5MHz check 1.6V ±0.5V
8V ±0.2V
3-band
1602kHz 5123
6.9V ±0.2V
2-band
1
531kHz check 1.1V ±0.4V
279kHz 5122 8V ±0.2V
153kHz check 1.1V ±0.4V
IC 7101
21
2
5119 0mV ±3mV
shortcircuit
2141
to block AFC
3
98MHz 3142 152kHz ±1kHz
IF coil
inside
4
98MHz right channel min.
FM frontend
1110
IC 7101
36
100nF
5111
5
IC 7101
40
100nF
5112
f
o
see symmetric
remark 2)
5114 0mV ±2mV
2
1494kHz 2106
558kHz 5102
5
f
198kHz 5103
o
symmetric
ECO6 Sys Cenelec, 190599
1)