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SCHEMATIC DIAGRAM - 3
: +B signal line : FM/AM signal line
: FM signal line : FM OSC signal line
: AM signal line : AM OSC signal line
TUNER CIRCUIT
Z120 FM FRONT END (ENV17290G1Y) 2SK238 RF AMP D JK101 FM EXT ANT 75 4P 7P 1uH 22P 15P 1 2 2 1P 1 0.47uH 100K 18P 8P 8P G 100K S 1P 22P 2SC2620 4P FM MIXER 10K Q101 FM IF AMP CF201 1 3 ((0V)) Q101<0.7V> (0V) C104 1000P R105 470 6 2 R103 270 R104 1K R106 470K C103 R107 0.01 330 ((0V)) <3.8V> (0V) ((0V)) <0V> (0V) 22
2SC2787LTA
7 16V100 0.022
220P 100 0.022
0.022
33K
0.022
1.5M
2.7K
AM LOOP ANT AM EXT ANT
2SK360 FM OSC
33K 8P 8P 100K
470K
L101 3 0.68uH 3 4 4 5 L102 0.68uH
10K
220
33K
330
150 330
C101 0.01
C102 25V10
15P 8 2SC2996 BUFFER AMP 3 CF202 1
33P 1.2K 10K
2SC2996 BUFFER AMP 18P 2P
47P
3P
2 3 2 AM ANT COIL 4 R143 22K C119 560P R121 22K R120 47K 5 6 C115 50V4.7 C120 25V10 C137 4700P C118 0.027 C131 100P C139 4700P C117 0.027 C144 4700P C143 4700P R146 100K Q106
1
8
C138 0.01
AM OSC COIL 9 R110 C107 5.6K 0.047 C114 50V3.3 C136 1000P C109 1000P 8 7 Z101 RLA2Z006M-T R112 100K C108 8.2P
C142 50V1
R142 1K C141 R141 50V1 1K R145 100K
C116 R102 0.033 4.7K
R123 68K
((3.93V)) <3.99V> (3.99V) FM IF IN OSC OUT ((5.44V)) ((5.32V)) <5.48V> <5.50V> (5.94V) (5.95V) AM MIX OUT OSC ((2.59V)) ((2.16V)) <2.63V> <2.17V> (2.63V) (2.17V) AFC REG ((2.58V)) ((2.15V)) <2.63V> <2.15V> (2.14V) (2.15V) AM IF IN AM RF IN ((0.33V)) ((0V)) <1.88V> <0V> (1.33V) (0V) AGC GND ((0V)) ((5.00V)) <0.01V> <0.01V> (1.70V) (0.01V) AM OUT SD ((2.57V)) ((5.24V)) <2.56V> <5.24V> (1.58V) (5.26V) DET OUT ST ((2.15V)) ((3.21V)) <2.15V> <3.44V> (2.15V) (4.40V) PILOT IN FM DET ((2.16V)) ((5.38V)) <2.16V> <5.49V> (2.16V) (5.95V) MPX IN VCC ((2.11V)) ((3.76V)) <2.10V> <0.02V> (2.11V) (0.02V) PILOT OUT STRQ ((3.93V)) ((1.85V)) <4.03V> <1.86V> (1.11V) (1.88V) FM/AM RCH ((3.11V)) ((1.89V)) <4.45V> <1.91V> (4.13V) (1.92V) MONO LCH
RVTDTA114EST
POWER SUPPLY (FM:ON) ((0V)) <15.7V> (0V) ((16.1V)) <15.8V> (16.1V)
24
23
22
21
20
19
18
17
16
15
14
13
((16.1V)) <0V> (16V)
R118 R119 4.7K 33K
IC101
Q106
1 ((2.17V)) <2.17V> (2.17V) C127 16V22
2
3
4
5
6
7
8
9
10
11
12
IC101
LA1833MN-TLM
C121 50V0.47 C123 50V1 FM/AM IF AMP, DET/AM OSC, MIX/FM MPX
C126 C106 0.01 Z102 RLI2Z006M-T 0.047 3 4 2 C147 1000P 1 3 C129 6.3V100 6 5 C148 0.01
X102 R125 470 R126 1.5K R128 82 C149 0.1
R127 470
R122 2.7K R131 68
C125 25V22 C130 6.3V100 C132 1000P R114 5.6K R113 10K
R111 390 ((16.21V)) <4.32V> (4.57V) AIN ((0V)) <0.88V> (0.88V) PD ((0.89V)) <0.89V> (0.89V) VDD ((5.25V)) <5.25V> L103 (5.25V) 0.47uH FMIN ((0V)) <2.54V> (0V) AMIN ((2.61V)) <0V> (2.52V) MONO ((0.01V)) <4.45V> (0.01V) IFIN R117 68K
C110 D101 0.01 MTZJ5R1BTA ((2.62V)) <2.62V> (2.62V) C133 19 20 15P VSS XOUT
C111 50V4.7 R116 R115 1K C112 560 0.01
((0V)) <0V> (0V)
C113 R129 27K 1000P
R132 10K
18 AOUT
17
16
15
14
13
12
C124 100P ((0V)) <0V> (0V) 11
X103 XIN
IC102
((2.57V)) <2.58V> (2.59V) CE ((0.01V)) <0.02V> (0.01V) DI ((0.01V)) <0.02V> (0.01V) CL ((0.01V)) <0.02V> (0.01V) DO ((5.25V)) <5.25V> (5.26V) AM ((3.99V)) <4.03V> (0.15V) ((0V)) LW <0V> (0V) SDL ((3.93V)) <3.97V> (4.41V) STRQ ((4.52V)) <0.02V> (0.02V) FM IC102
C134 18P R138 3.3K
1
2
3
4
5
6
7
8
9
10 ((16.16V)) <0.07V> (16.18V)
R133 1K R130 10K R137 R136 R135 R134 1K 1K 1K 470
C122 50V1
R124 270
LC72131MDTRM
PLL FREQUENCY SYNTHESIZER
SCHEMATIC DIAGRAM - 4
: +B Line
: FM/AM signal line
: Main signal line
R538 10K R438 10K
R505 18K R405 18K
R501 18K R401 18K
JK601 R CH AUX IN L CH
R520 15K
R420 15K
((0V)) ((0V)) <0V> <0V> (0V) (0V)
((0V)) ((0.7V)) <0V> (0V) <0.7V> (0.7V)
((0V)) ((0V)) ((0V)) ((0.7V)) <0V> ((0.7V)) <0V> ((0.7V)) <0V> (0V) (0V) <0.7V> (0V) <0.7V> <0.7V> (0.7V) (0.7V) (0.7V)
Q503 ((0.7V)) <0V> (0V) Q403
((0V)) <0V> (0V) ((0.7V)) <0V> (0V) ((0V)) <0V> (0V)
C650 1000P
Q502
((0.7V)) <0.7V> (0.7V)
((0V)) <0V> (0V)
Q402
((0V)) <0V> (0V)
Q501
((0V)) <0V> (0V)
Q401
((0V)) <0V> (0V)
((0V)) <0V> (0V)
((1.6V)) <1.6V> (1.6V) Q603
Q603
Q401,402
Q501,Q502
2SC1740SRTA
MUTING
2SC1740SRTA
MUTING
R611 4.7K PW603 AUX_L 1 7.5V 2 COMMON_L A_GND COMMON_R DC15V 3 4 5 6
RVTDTA144EST
MUTING CONTROL (AUX) Q403,Q503
2SC1740SRTA
MUTING
TO MAIN CIRCUIT (CS603) ON SCHEMATIC DIAGRAM-7
C524 25V10 R514 R515 C545 100K 8.2K 25V10 C520 25V10 C518 C517 10P 100P
((8.04V)) <7.93V> (8.03V) ((8.01V)) <7.90V> (8.00V)
C424 25V10 R620 47K R621 47K
((16.00V)) <15.79V> (15.98V) ((8.04V)) <7.94V> (8.03V)
R516 33K
C641 1000P
C634 25V10
8 VCC
7
6
5
IC604
((8.04V)) <7.94V> (8.03V) ((8.04V)) <7.94V> (8.03V) ((7.99V)) <7.90V> (8.00V)
1
2
3
VEE 4
((0V)) <0V> (0V)
IC604
BA4558FDXE2
BUFFER AMP R416 33K
C420 25V10
C418 C417 10P 100P R414 100K R415 8.2K C445 25V10
R503 1.8K R403 1.8K R502 18K R402 18K ((0V)) <0V> ((0.8V)) ((0V)) ((0.8V)) (0V) <0.5V><0.5V> <0V> (0.1V) (0.1V) (0V) ((0V)) <0V> (0V) R663 2.2K ((15.4V)) <15.4V> (15.7V) ((0V)) <0V> (0V) ((0V)) Q407 <0V> (0V)
JK604
LINE OUT
Q507
((0.7V)) <0.5V> (0.1V) D637 RVD1SS133TA ((15.7V)) <15.5V> (15.7V)
C651 1000P
Q407,Q507
2SC1740SRTA Q617
D636 RVD1SS133TA R662 4.7K ((12.7V)) <15.4V> (15.6V) C670 50V2.2 ((0V)) <0V> (0V) MUTING Q618
Q618
RVDTC144EST
MUTING CONTROL
Q617
RVDTDTA144EST
MUTING CONTROL 8 7 6 5 4 3 2 1 CS601
VREF+ T_MUTE PLL_CL PLL_DO/STEREO PLL_DI PLL_CE SD LINE_MUTE
TO OPERATION CIRCUIT (PW601) ON SCHEMATIC DIAGRAM-6