Philips AZ 3038, Service Manual, Page: 17 / 25

7 - 2 7 - 2
VARICAP ALIGNMENT
FM RF
FM IF
VCO
AM IF
AM RF
3)
108MHz
87.5MHz
(65.81MHz)
87.5MHz
(65.81MHz)
87.5MHz
(65.81MHz)
279kHz
153kHz
1602kHz
531kHz
5130
check
5122
check
5123
check
8V ± 0.2V
4.3V ± 0.5V
(1.2V ± 0.5V)
8V ± 0.2V
1.1V ± 0.4V
8V ± 0.2V
1.1V ± 0.4V
1494kHz
558kHz
560kHz
1500kHz
5105
LW ferrite coil
198kHz
1494kHz
558kHz
560kHz
1500kHz
198kHz
2106
5104
MW ferrite coil
5104
MW ferrite coil
2106
3142 152kHz ± 1kHz
1)
98MHz
5112
MAX
FM
87.5 - 108MHz
(65.81 - 74, 87.5 - 108MHz)
LW
153 - 279kHz
MW
FM/MW/LW- version, 9kHz grid
531 - 1602kHz
1700kHz
530kHz
5123
check
8V ± 0.2V
1.1V ± 0.4V
1602kHz
531kHz
5123
check
6.9V
±
0.2V
1.1V ± 0.4V
108MHz
108MHz 2155
5131
MW
FM/AM-version, 10kHz grid
530 - 1700kHz
FM
MW
LW
98MHz, 1mV
continuous wave
450kHz
connect pin 6 of
IC 7101 (AM Osc.)
with 2.2k Ω to Vcc
Use Service Testprogram. By selecting the TUNER TEST test frequencies will be stored as preset frequencies automatically.
4
1
3
5
5
A
A
5119 FM
10.7MHz, 45mV
continuous wave
2 D
mod=1kHz
∆ f= ± 22.5kHz
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)
Repeat
ECO6, general with ferrite antenna, 070799
TUNER ADJUSTMENT TABLE
( ECO6 FM/MW- and FM/MW/LW - versions with ferrite antenna)
∆ f= ± 10kHz
V
RF
= 0.5mV
C
see
remark 2)
220R
100nF
36
IC 7101
220R
100nF
40
IC 7101
2141
shortcircuit
to block AFC
21
IC 7101
max.
symmetric
f
o
AM AFC
MW
C
continuous wave
V
RF
= 2mV
5111
5114
2
0 ± 2 mV DC
0 ± 3 mV DC
MW
FM/MW/LW- and FM/MW-version
( 9kHz grid)
531 - 1602kHz
B
∆
f =
±
30kHz
V
RF
as low as
possible
max.
symmetric
f
o
MW
FM/AM-version, 10kHz grid
530 - 1700kHz
2)
RC network serves for damping the IF-filter while adjusting the other one.
3)
LW has to be aligned before MW.
Waverange Input frequency Input Tuned to Adjust Output Scope/Voltmeter
FM
87.5 - 108MHz
(65.81 - 74, 87.5 - 108MHz)
FM/MW-version, 9kHz grid
531 - 1602kHz
(as low as
possible)
These assembly drawings show a summary of all possible versions.
For components used in a specific version see schematic diagram respectively partslist.
ECO6 PA 34450 stage .2, 110700
41..
in schematic diagram)
(not all items shown
SMD jumper
E B
C
A
K
1
2
3
4
3
4
1
2
5
bl
a
c
k
black
red
red
LW MW
bl
u
e
5104 5105
2101 B3
2103 E3
2104 B3
2108 D2
2109 D1
2110 C1
2111 C2
2112 B4 2119 C1
2120 C1
2122 C2
2123 C2
2124 C2
2125 C1
2126 D5
2127 D5 2130 D5
2131 D5
2132 D5
2134 E6
2135 D6
2136 A3
2137 A3
2139 D5 2140 D6
2141 D6
2144 C6
2145 A4
2146 C6
2147 A4
2148 B6
2149 E6 2150 C4
2152 E4
2153 D4
2159 D4
2161 B5
2163 B6
2164 D6
2165 C4 2166 C6
2167 C6
2169 A2
2187 B7
2188 C7
2189 E7
2192 B7
2193 A7 2194 C7
2196 A6
2197 C7
3101 E4
3102 D2
3103 D4
3104 B3
3105 C3 3106 E2
3107 C1
3108 C1
3109 D2
3113 B5
3119 B5
3123 E5
3125 E6 3128 B2
3132 E4
3134 C2
3137 C3
3141 D4
3143 D7
3144 A3
3145 E5 3152 A4
3153 A4
3155 E6
3156 B5
3157 A5
3158 B3
3159 A4
3160 A4 3161 A4
3166 B6
3167 E7
3169 C6
3170 A5
3176 D5
3180 C3
3181 D4 3186 A6
3187 B7
3188 A6
3189 B7
3190 B6
3191 C7
3192 B7
3193 D7 3194 D7
3195 E7
3196 C7
4101 D1
4102 D1
4104 C2
4105 B4
4106 C3 4107 D4
4108 D3
4109 D2
4110 D1
6103 B2
6105 C2
6106 D2
6120 A5 6130 D4
6131 D3
6181 B7
6182 C7
6183 C7
7101 C5
7102 D3
7103 E6 7109 E5
7111 A5
7119 B5
7122 B2
7124 C2
7180 B7
7181 C7
7182 D7 7183 B7
TUNER BOARD ECO6 PA /
copperside view
4 3
D 1
A
C
5
2
B
Vcc1
Vcc2
Vdd
ECO6 PA combi layout 34450 stage .2, 110700
1105 B7
1121 B6
1122 B5 2106 D6
2107 C6
2128 C4 2129 C5
2133 D3
2138 D2 2155 C5
2186 C1
2190 B1 2191 A2
2195 C1
3142 E1 5102 D7
5103 E7
5109 B4 5110 B3
5111 B4
5112 B3 5114 B3
5119 D2
5121 C2 5122 B6
5123 B7
5130 D4 5131 E5
7104 C7
7105 D6 9101 B2
9102 D2
9103 B1 9104 B7
9105 D1
9106 C4 9107 D5
9108 C5
9109 E2 9110 E2
9111 C2
9112 D6 9113 D6
9114 E6
9115 D7
TUNER BOARD ECO6 PA /
componentside view
AM-AFC
DISC.
VCO
LW MW
AM-IF2
AM-IF1
FM-IF1
FM-OSC.
LW-OSC.
MW-OSC.
FM-RF
FM-RF
AM-RF
LW-RF
MW-RF
FM-IF2
B
A
TUNER BOARD - LAYOUT DIAGRAM