Philips FW-M777 Service Manual page 33

1101 A6 1120 A4 1132 A5 2128 C4 2138 C2 3142 D2 5110 B3
1102 B6 1130 B5 2106 C5 2129 B4 2144 B2 5102 D6 5111 B4
1103 D6 1131 D5 2107 B5 2133 D2 2155 C4 5109 A3 5112 A3
TUNER BOARD ECO6 Systems non Cenelec /
2101 B4 2119 D3 2130 D5 2137 A4 2146 B7 2153 C5
2102 B1 2120 D3 2131 C5 2139 C6 2147 A5 2154 C4
2103 D4 2124 D3 2132 D6 2140 C6 2148 B6 2159 C5
2104 B4 2125 D3 2134 D7 2141 C6 2149 D6 2161 A6
2105 C1 2126 D6 2135 D7 2143 C7 2150 B5 2163 B6
2112 B5 2127 C5 2136 A4 2145 A5 2152 C5 2164 C6
TUNER BOARD ECO6 Systems - non Cenelec /
4 3
1 7
2 8
A
C
1
D
These assembly drawings show a summary of all possible versions.
For components used in a specific version see schematic diagram respectively partslist.
7A-3
5114 A2 5123 D5 7112 C1 9104 B5 9107 D4
5119 C2 5130 D3 9101 A2 9105 B1 9108 C4
5121 B2 5131 D4 9103 B2 9106 B3 9109 D2
componentside view
FM 75
AM FRAME AERIAL
ECO6 System non Cenelec stage .3, 120900
2165 C4 3103 C4 3134 D3 3152 A4 3158 A4 3169 B6 4106 C4
2166 B6 3104 B4 3141 C5 3153 A4 3159 A5 3170 A6 4107 C5
2167 B6 3105 C4 3143 D6 3154 C7 3160 A5 3172 C7 4108 C5
2169 A4 3113 B5 3144 B7 3155 C7 3161 A5 3176 D6 6103 B3
3101 D5 3119 B5 3145 C5 3156 A6 3167 B7 3181 D4 6105 C3
3102 C3 3132 D5 3146 C7 3157 A6 3168 C7 4103 B5 6106 C3
copperside view
V dd
(not all items shown
in schematic diagram)
Vcc2
Vcc1
5
ECO6 Systems non CENELEC stage .3, 120900
TUNER ADJUSTMENT TABLE
Waverange
VARICAP ALIGNMENT
FM
87.5 - 108MHz
A
(65.81 - 74, 87.5 - 108MHz)
MW
FM/AM-version, 10kHz grid
530 - 1700kHz
FM/MW-version, 9kHz grid
531 - 1602kHz
LW
153 - 279kHz
MW
FM/MW/LW- version, 9kHz grid
531 - 1602kHz
FM IF
B
FM
FM RF
FM
87.5 - 108MHz
(65.81 - 74, 87.5 - 108MHz)
6107 C7 7103 D7
6120 A6 7111 A5
6130 D4 7119 B5
VCO
6131 C4
7101 C5
7102 D4
FM
AM IF
MW
K
A
C
AM AFC
MW
B E
SMD jumper 3)
AM RF
41..
4)
MW
FM/MW/LW- and FM/MW-version
( 9kHz grid)
531 - 1602kHz
2
LW
MW
FM/AM-version, 10kHz grid
530 - 1700kHz
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)
3)
For AM RF adjustments the original frame antenna has to be used !
Repeat
7A-3
( ECO6 FM/MW- and FM/MW/LW - versions with AM-frame aerial )
Input frequency Input Tuned to
108MHz
87.5MHz
(65.81MHz)
1700kHz
530kHz
1602kHz
531kHz
279kHz
153kHz
1602kHz
531kHz
IC 7101
21
10.7MHz, 45mV
D
shortcircuit
continuous wave 2141
to block AFC
108MHz A 108MHz
mod=1kHz
87.5MHz 87.5MHz
(65.81MHz) (65.81MHz)
f= 22.5kHz
98MHz, 1mV
A
98MHz
continuous wave
IC 7101
36
100nF
C
450kHz
f= 10kHz
IC 7101
40
V = 0.5mV
RF 100nF
connect pin 6 of
(as low as
see
IC 7101 (AM Osc.) remark 2)
possible)
with 3.3k to Vcc
C
continuous wave
V = 2mV
RF
1494kHz 1494kHz
B
558kHz 558kHz
198kHz
198kHz
1500kHz 1500kHz
f = 30kHz
V as low as
RF
560kHz 560kHz
possible
2)
RC network serves for damping the IF-filter while adjusting the other one.
4)
MW has to be aligned before LW.
Adjust Output Scope/Voltmeter
5130 8V 0.2V
4.3V 0.5V
check
(1.2V 0.5V)
5123 8V 0.2V
check 1.1V 0.4V
5123 6.9V 0.2V
1
check 1.1V 0.4V
5122 8V 0.2V
check 1.1V 0.4V
5123 8V 0.2V
check 1.1V 0.4V
2
5119 0 3 mV DC
2155
4
MAX
5131
1)
3
3142 152kHz 1kHz
5111
5
5112
f
o
symmetric
5114
2
0 2 mV DC
2106
5102
5
5103
2106
f
o
symmetric
5102
ECO6, Sys + PA with frame aerial, 070799