Philips AZ-2040 Manuale di servizio - Pagina 15

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Philips AZ-2040 Manuale di servizio
TUNER BOARD ECO6 - LAYOUT DIAGRAM
1105 B7
2106 D6
2129 C5
2155 C5
2191 A2
5102 D7
5110 B3
1121 B6
2107 C6
2133 D3
2186 C1
2195 C1
5103 E7
5111 B4
1122 B5
2128 C4
2138 D2
2190 B1
3142 E1
5109 B4
5112 B3
TUNER BOARD ECO6 PA /
componentside view
AM-IF2
AM-AFC
FM-IF2
DISC.
FM-OSC.
VCO
LW
2101 B3
2119 C1
2130 D5
2140 D6
2150 C4
2166 C6
2194 C7
2103 E3
2120 C1
2131 D5
2141 D6
2152 E4
2167 C6
2196 A6
2104 B3
2122 C2
2132 D5
2144 C6
2153 D4
2169 A2
2197 C7
2108 D2
2123 C2
2134 E6
2145 A4
2159 D4
2187 B7
3101 E4
2109 D1
2124 C2
2135 D6
2146 C6
2161 B5
2188 C7
3102 D2
2110 C1
2125 C1
2136 A3
2147 A4
2163 B6
2189 E7
3103 D4
2111 C2
2126 D5
2137 A3
2148 B6
2164 D6
2192 B7
3104 B3
2112 B4
2127 D5
2139 D5
2149 E6
2165 C4
2193 A7
3105 C3
TUNER BOARD ECO6 PA /
copperside view
4
3
1
3
1
3
5
2
4
2
4
A
5104
MW
1
D
B
These assembly drawings show a summary of all possible versions.
For components used in a specific version see schematic diagram respectively partslist.
7 - 2
5114 B3
5122 B6
5131 E5
9101 B2
9104 B7
9107 D5
9110 E2
5119 D2
5123 B7
7104 C7
9102 D2
9105 D1
9108 C5
9111 C2
5121 C2
5130 D4
7105 D6
9103 B1
9106 C4
9109 E2
9112 D6
A
FM-IF1
AM-IF1
LW-OSC.
MW-OSC.
FM-RF
AM-RF
FM-RF
LW-RF
MW
B
ECO6 PA combi layout 34450 stage .2, 110700
3106 E2
3128 B2
3152 A4
3161 A4
3186 A6
3194 D7
4107 D4
3107 C1
3132 E4
3153 A4
3166 B6
3187 B7
3195 E7
4108 D3
3108 C1
3134 C2
3155 E6
3167 E7
3188 A6
3196 C7
4109 D2
3109 D2
3137 C3
3156 B5
3169 C6
3189 B7
4101 D1
4110 D1
3113 B5
3141 D4
3157 A5
3170 A5
3190 B6
4102 D1
6103 B2
3119 B5
3143 D7
3158 B3
3176 D5
3191 C7
4104 C2
6105 C2
3123 E5
3144 A3
3159 A4
3180 C3
3192 B7
4105 B4
6106 D2
3125 E6
3145 E5
3160 A4
3181 D4
3193 D7
4106 C3
6120 A5
Vcc2
2
5105
LW
Vcc1
Vdd
black
C
5
ECO6 PA 34450 stage .2, 110700
TUNER ADJUSTMENT TABLE
Waverange
9113 D6
9114 E6
9115 D7
VARICAP ALIGNMENT
FM
87.5 - 108MHz
(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
FM
FM RF
FM
87.5 - 108MHz
(65.81 - 74, 87.5 - 108MHz)
6130 D4
7109 E5
7183 B7
VCO
6131 D3
7111 A5
6181 B7
7119 B5
6182 C7
7122 B2
6183 C7
7124 C2
FM
7101 C5
7180 B7
7102 D3
7181 C7
7103 E6
7182 D7
AM IF
MW
K
AM AFC
MW
A
C
3)
AM RF
B
E
LW
SMD jumper
41..
MW
(not all items shown
FM/MW/LW- and FM/MW-version
in schematic diagram)
( 9kHz grid)
531 - 1602kHz
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)
LW has to be aligned before MW.
Repeat
7 - 2
( ECO6 FM/MW- and FM/MW/LW - versions with ferrite antenna)
Input frequency
Input
Tuned to
Adjust
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
A
108MHz
108MHz
mod=1kHz
87.5MHz
87.5MHz
∆f=–22.5kHz
(65.81MHz)
(65.81MHz)
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 2.2k‰ to Vcc
C
continuous wave
V
= 2mV
RF
198kHz
198kHz
B
LW ferrite coil
1494kHz
1494kHz
558kHz
558kHz
MW ferrite coil
1500kHz
1500kHz
∆f = –30kHz
V
as low as
RF
560kHz
560kHz
possible
MW ferrite coil
2)
RC network serves for damping the IF-filter while adjusting the other one.
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
0 – 3 mV DC
5119
2155
4
MAX
5131
1)
3
3142
152kHz –1kHz
5111
5
5112
f
o
symmetric
5114
2
0 – 2 mV DC
5105
2106
5104
5
2106
f
o
symmetric
5104
ECO6, general with ferrite antenna, 070799