
6.
Block Diagrams, Testpoint Overviews, and Waveforms
Block Diagram Audio/Control
E_14770_004.eps
010904
HERCULES
A4
A3
REAR I/O CINCH
A8
A5
SIDE AV
D
AUDIO AMPLIFIER
A7
7200-A (IF)
I002
I001
F003
F952
F955
I951
I952
F004
SDA
SCL
5001
FM-RADIO
TUNER
+
TV TUNER
3001
3000
6001
BZX79-C33
TUNER IF
A4
A4
A2
1000
6, 7
9
1
2
11
SSIF
VIF1
VIF 2
SIF1
SIF2
RF_AGC
VT_SUPPLY
VT
AGC
5
SEL-LLPIM
A4
VOL_MUTE
A4
4
IF
FM
10
7001
7003
FILTER
SELECTION
1002
1003
1001
ERR
10
TV
FM
+5V
105
104
98
100
99
PLL
PLL
FM/QSS
AM
VCO
VIDEO
DEMOD
TUNER IF
AGC
FM
DEM.
AMPLI
+
MUTE
LS
OUTPUT
AUDIO
SOURCE
SELECTION
DIGITAL
SOUND
PROCESSING
VIDEO
IF
PHASE
DISC
AUDIO IF
QSS/AM
SOUND
MIXER
AM
SOUND
DET.
A8
REAR I/O CINCH
AV1
SC1_L_IN
SC1_R_IN
L
R
AV2
SC2_L_IN
INTF_R_IN
75
96
93
92
INTF_L_IN
76
SC2_R_IN
72
SC2_L_IN
73
SIDE_R_IN
79
SIDE_L_IN
80
SC1_R_IN
94
SC1_L_IN
95
SC2_R_IN
L
R
L
AUDIO
CONTROL
To VIDEO PART
see block diagram
VIDEO
D
SIDE AV
A5
CONNECTIVITIES
SIDE_L_IN
SIDE_R_IN
1207
3
1
1252
3
1
R
1278
1254
1
2
5
2
FM/QSS
SSIF
AM
7200-F (AUDIO)
ADC
DAC
DIGITAL PART
DIGITAL
STEREO
SOUND
DECODER
AUDIO
SELECT
67
66
69
68
SCART
CINCH
OUTPUT
AUDIO
SELECT
MONITOR
OUT
L
R
MUTING
7104
RESERVED
1138
L 8 Ohm/15W
R 8 Ohm/15W
1281
7990
TDA2616Q
5
2
L 8 Ohm/15W
R 8 Ohm/15W
1280
1
2
OR
4
7
6
1
9
5
V AUDIO+1
-V AUDIO
2
7991
VOLUME
+
MUTE
MAIN_OUTL
MAIN_OUTR
Stby_Con
A4
MUTE
HP
OUTPUT
1693
3
4
5
F692
22
20
21
KEY_PROTN
9
IR
32
LED
OR
30
LIGHT-SENSOR
14
31
3604
7601
3605
see
IIC
DIAGRAM
HERCULES (CONTROL)
A4
FEATURES
A5
+3.3V
7
8
6
5
A7
VOL_MUTE
18
15
A1
POWER_DOWN
A1
POWER_DOWN
A1
A7
A3
Stdby_Con
A5
ROT
17
SEL_LLPIM
16
118
119
+3.3V
+3.3V
7200-G (Control)
TDA12001H1
EEPROM
(NVM)
I/O PORTS
+
IIC BUS
TRANSCEIVER
+
PWM
OUTPUTS
+
CPU
+
TELETEXT
(close caption)
+
ROM
RAM
3204
3202
3207
3214
ERR
9
ERR
20
ERR
19
FRONT INTERFACE
(PARTLY)
J1
FRONT CONTROL
A9
6692
TSOP1836
6693
+3.3V
6691
ON/OFF
USA only
6
LOCAL
KEYBOARD
+
1693
3
4
5
6
SDA
WRITE_PROTECT
SCL
2
1
3280
3279
3266
3265
E
D
N.C.
OR
ON/OFF
(USA only)
IR
LED
KEYBOARD
LOCAL
KEYBOARD
LIGHT_SENSOR
6692
TSOP1836
+3.3V
6691
IR
1
6693
LED
KEYBOARD
LIGHT_SENSOR
IR
LED
KEYBOARD
LIGHT_SENSOR
7205
1205
24MHz
A5
I2SD/1
23
A5
5V
N.C.
N.C.
24
A5
SEL_SC2_INTF
25
N.C.
MAIN_OUTR
MAIN_OUTL
SC1_R_OUT
SC1_L_OUT
SC2_R_OUT
SC2_L_OUT
7992
MUTING
7993, 7994
N.C.
1240
*
*
6209
F003 0V (N.A.)
200mV / div AC
10ms / div
1V / div DC
20µs / div
1V / div DC
20µs / div
F004
I001
I002
F201 2V / div DC
F203 2V / div DC
500mV / div DC
10ms / div
1V / div DC
20µs / div
F205
F206
500mV / div DC
20µs / div
500mV / div DC
20µs / div
500mV / div DC
20µs / div
F240
F241
F242
50mV / div AC
2ms / div
2V / div DC
2ms / div
50mV / div AC
2ms / div
500mV / div AC
2ms / div
500mV / div AC
2ms / div
I952
I951
F952
F955
F692
www.freeservicemanuals.info
Summary of Contents for L04A AB
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