Philips MX5100VR/00, Руководство по обслуживанию

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98MHz
Waverange Input frequency Input Tuned to Adjust Output Scope/Voltmeter
VARICAP ALIGNMENT
FM - VCO
FM RF (channel separation)
AM IF
AM RF
3)
108MHz
87.5MHz
check
check
8V
±
1.2V
1.6V
±
0.5V
8V
±
0.2V
6.9V
±
0.2V
1.1V
±
0.4V
152kHz
±
1kHz
1)
98MHz 3142
198kHz 198kHz 5103
5111
FM
87.5 - 108MHz
(50kHz grid)
1602kHz
531kHz
5123
check
MW
531 - 1602kHz
(9kHz grid)
8V
±
0.2V
1.1V
±
0.4V
279kHz
153kHz
5122
check
LW
153 - 279kHz
(3kHz grid)
FM
FM
LW
558kHz 558kHz
1494kHz
5102
1494kHz 2106
MW
MW
98MHz, 1mV
continuous wave
98MHz, 1mV
90% Left + 9% pilot
mod=1kHz
IF coil
inside
FM frontend
1110
1
3
5
5
A
FM - IF
0mV
±
3mV 5119 FM
10.7MHz, 45mV
continuous wave
2 D
right channel min. 4 A
0mV
±
2mV 5114
2
C
Repeat
C
5112
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!
TUNER ADJUSTMENT TABLE
( ECO6 Cenelec FM/MW - and FM/MW/LW - versions with AM-frame aerial )
max.
symmetric
f
o
max.
symmetric
f
o
ECO6 Sys Cenelec, 190599
B
∆
f =
±
30kHz
V
RF
as low as
possible
MW has to be aligned before LW.
3-band
2-band
Note: The FM-frontend unit has already been adjusted by the factory
and needs therefore no further adjustments for service purposes.
2141
shortcircuit
to block AFC
21
IC 7101
see
remark 2)
220R
100nF
36
IC 7101
220R
100nF
40
IC 7101
450kHz
connect pin 6 of
IC 7101 (AM Osc.)
with 3.3k

to Vcc
AM AFC
MW
continuous wave
V
RF
= 2mV
∆
f =
±
10kHz
V
RF
= 0.5mV
(as low as
possible)
Use Service Testprogram. By selecting the TUNER TEST test frequencies will be stored as preset frequencies automatically.
AM FRAME AERIAL
FM 75

FM FR
ONTEND
Birdy Filter
ECO6 Sys-Cenelec, layout stage .8, 200803
1101 B5
1102 B5
1103 C5 1110 B4
1120 A4
1130 A5 1131 C5
1132 A4
2106 B4 2107 B3
2128 A3
2129 B3 2133 C1
2138 B1
2144 B1 2162 A4
2191 B4
3142 C2 5102 C4
5103 C4
5109 B3 5110 A2
5111 A3
5112 A2 5114 A2
5115 C2
5119 B2 5121 B2
5122 C3
5123 C3 7104 C4
7105 C5
7112 B1 9101 A2
9102 B2
9103 A1 9104 B1
9105 B1
9106 B1 9107 B4
9108 B3
9109 C2 9110 A4
9111 A3
TUNER BOARD ECO6 Systems - Cenelec /
componentside view
B
A
These assembly drawings show a summary of all possible versions.
For components used in a specific version see schematic diagram respectively partslist.
ECO6 Sys-Cenelec, layout stage .8, 200803
41..
in schematic diagram)
(not all items shown
SMD jumper
E B
C
A
K
TUNER BOARD ECO6 Systems - Cenelec /
copperside view
2102 B1
2105 B1
2108 C1
2109 C1
2118 C3
2119 C3 2120 C3
2122 C3
2123 C3
2124 C3
2125 C3
2127 C4 2130 B3
2131 C4
2132 C4
2134 C5
2135 C5
2136 A3 2137 A3
2139 B4
2140 B4
2141 B5
2143 B5
2145 B5 2146 B5
2147 A5
2148 B4
2149 C4
2150 B3
2159 B3 2161 A4
2163 A4
2164 B4
2165 B3
2166 B5
2167 B4 2169 A3
2180 B2
2190 B2
3105 B3
3108 C2
3109 C1 3123 A5
3125 A5
3128 C2
3130 C4
3131 C4
3132 B3 3134 C3
3135 C4
3137 C4
3141 B3
3143 C5
3144 A5 3145 C4
3146 B5
3150 B3
3151 A2
3152 A3
3153 A3 3154 B5
3155 B5
3156 A4
3157 A4
3158 A3
3159 A3 3160 A3
3161 A4
3167 A5
3168 C5
3169 B4
3170 A4 3171 B5
3172 B5
3176 C4
3180 A5
3190 B2
3191 A3 3192 A2
3193 B2
3194 B2
3195 B2
4101 C2
4102 C2 4104 C3
4105 B2
4106 B3
4107 C4
5118 C4
6105 B2 6106 B2
6107 B5
6120 A4
7101 B4
7103 C5
7109 A5 7110 B2
7111 A4
7122 C3
7124 C3
1
1
8
2
7
8
5118
2180
3135
4
D
A
C
1 2 5
3
Vdd
Vcc2
Vcc1
+FM
AM/FM Tuner Unit Top & Bottom View
1-12-85 1-12-86
31033033421p8