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13.BSR_IN
12.S_GND
9.BSL_IN
10.S_GND
11.FR_IN
8.S_GND
7.FL_IN
6.S_GND
3.CNT_IN
4.S_GND
5.SR_IN
2.S_GND
1.SL_IN
FROM INPUT B'D
SL_CH
14.S_GND
15.MUTE_P
18.CLIPPING_ON
16.V_GND
17.HEAT
CNT_CH
SR_CH
FL_CH
FR_CH
BSL_CH
BSR_CH
6.SL-SIG
5.SL_FB2
4.SL+SIG
2.+B
3.+B
1.SL_FB1
8.-B
7.-B
1.MUTE_P
2.N.C
6.CLIPPING_ON
7.P_GND
4.N.C
5.N.C
3.HEAT
TO AMP BOARD
TO AMP BOARD
8.P_GND
6.CNT-SIG
5.CNT_FB2
4.CNT+SIG
2.+B
3.+B
1.CNT_FB1
8.-B
7.-B
6.SR-SIG
5.SR_FB2
4.SR+SIG
2.+B
3.+B
1.SR_FB1
8.-B
7.-B
6.FL-SIG
5.FL_FB2
4.FL+SIG
2.+B
3.+B
1.FL_FB1
8.-B
7.-B
6.BSL-SIG
5.BSL_FB2
4.BSL+SIG
2.+B
3.+B
1.BSL_FB1
8.-B
7.-B
6.FR-SIG
5.FR_FB2
4.FR+SIG
2.+B
3.+B
1.FR_FB1
8.-B
7.-B
6.BSR-SIG
5.BSR_FB2
4.BSR+SIG
2.+B
3.+B
1.BSR_FB1
8.-B
7.-B
PRE-AMP CUP12373Z-1
1
2
4
3
5
6
7
8
9
10
11
12
14
13
16
15
17
18
CN401
C4035
33P
C4021
680P
Q4041
A1268GR
Q4042
C3200GR
Q4040
A1268GR
Q4019
C3200BL
Q4020
C3200BL
Q4021
C3200GR
R4100
560
R4078
560
R4094
560
R4112
560
R4077
560
R4111
560
R4058
1.5K
R4059
1.5K
R4061
220
R4062
220
R4060
470
R4014
270
D4021
1SS133
C4028
100/16V
C4042
12P
R4087
33K
C4013
10/50V
R4013
33K
C4014
330P
R4057
1.2K
R4063
47K
D4013
1SS133
D4014
1SS133
C4034
33P
C4020
680P
Q4038
HVTKTA1268GRT
A1268GR
Q4039
C3200GR
Q4037
HVTKTA1268GRT
A1268GR
Q4016
C3200BL
Q4017
C3200BL
Q4018
C3200GR
R4099
560
R4076
560
R4093
560
R4110
560
R4075
560
R4109
560
R4051
1.5K
R4052
1.5K
R4054
220
R4055
220
R4053
470
R4012
270
D4020
1SS133
C4027
100/16V
C4041
12P
R4086
33K
C4011
10/50V
R4011
33K
C4012
330P
R4050
1.2K
R4056
47K
D4011
1SS133
D4012
1SS133
C4033
33P
C4019
680P
Q4035
A1268GR
Q4036
C3200GR
Q4034
A1268GR
Q4013
C3200BL
Q4014
C3200BL
Q4015
C3200GR
R4098
560
R4074
560
R4092
560
R4108
560
R4073
560
R4107
560
R4044
1.5K
R4045
1.5K
R4047
220
R4048
220
R4046
470
R4010
270
D4019
1SS133
C4026
100/16V
C4040
12P
R4085
33K
C4009
10/50V
R4009
33K
C4010
330P
R4043
1.2K
R4049
47K
D4009
1SS133
D4010
1SS133
C4031
33P
C4017
680P
Q4029
A1268GR
Q4030
C3200GR
Q4028
A1268GR
Q4007
C3200BL
Q4008
C3200BL
Q4009
C3200GR
R4096
560
R4070
560
R4090
560
R4104
560
R4069
560
R4103
560
R4030
1.5K
R4031
1.5K
R4033
220
R4034
220
R4032
470
R4006
270
D4017
1SS133
C4024
100/16V
C4038
12P
R4083
33K
C4005
10/50V
R4005
33K
C4006
330P
R4029
1.2K
R4035
47K
D4005
1SS133
D4006
1SS133
C4032
33P
C4018
680P
Q4032
A1268GR
Q4033
C3200GR
Q4031
A1268GR
Q4010
C3200BL
Q4011
C3200BL
Q4012
C3200GR
R4097
560
R4072
560
R4091
560
R4106
560
R4071
560
R4105
560
R4037
1.5K
R4038
1.5K
R4040
220
R4041
220
R4039
470
R4008
270
D4018
1SS133
C4025
100/16V
C4039
12P
R4084
33K
C4007
10/50V
R4007
33K
C4008
330P
R4036
1.2K
R4042
47K
D4007
1SS133
D4008
1SS133
C4030
33P
C4016
680P
Q4026
A1268GR
Q4027
C3200GR
Q4025
A1268GR
Q4004
C3200BL
Q4005
C3200BL
Q4006
C3200GR
R4095
560
R4068
560
R4089
560
R4102
560
R4067
560
R4101
560
R4023
1.5K
R4024
1.5K
R4026
220
R4027
220
R4025
470
R4004
270
D4016
1SS133
C4023
100/16V
C4037
12P
R4082
33K
C4003
10/50V
R4003
33K
C4004
330P
R4022
1.2K
R4028
47K
D4003
1SS133
D4004
1SS133
C4029
33P
C4015
680P
Q4023
A1268GR
Q4024
C3200GR
Q4022
A1268GR
Q4001
C3200BL
Q4002
C3200BL
Q4003
C3200GR
R4088
560
R4065
560
R4081
560
R4066
560
R4064
560
R4080
560
R4016
1.5K
R4017
1.5K
R4019
220
R4020
220
R4018
470
R4002
270
D4015
1SS133
C4022
100/16V
C4036
12P
R4079
33K
C4001
10/50V
R4001
33K
C4002
330P
R4015
1.2K
R4021
47K
D4001
1SS133
D4002
1SS133
1
2
4
3
5
6
7
8
CN409
1
2
4
3
5
6
7
8
CN408
1
2
4
3
5
6
7
8
CN407
1
2
4
3
5
6
7
8
CN406
1
2
4
3
5
6
7
8
CN405
1
2
4
3
5
6
7
8
CN404
1
2
4
3
5
6
7
8
CN403
1
2
4
3
5
6
7
8
CN402
R4211
OPEN
R4212
OPEN
R4213
OPEN
R4214
OPEN
R4215
OPEN
R4216
OPEN
R4217
OPEN
S_GND
BSL_IN
SR_IN
BSR_IN
V_GND
S_GND
S_GND
D
N
G
_
S
D
N
G
_
S
V_GND
S_GND
S_GND
D
N
G
_
S
D
N
G
_
S
V_GND
S_GND
S_GND
D
N
G
_
S
D
N
G
_
S
V_GND
S_GND
S_GND
D
N
G
_
S
D
N
G
_
S
V_GND
S_GND
S_GND
D
N
G
_
S
D
N
G
_
S
V_GND
S_GND
S_GND
D
N
G
_
S
D
N
G
_
S
V_GND
S_GND
S_GND
D
N
G
_
S
D
N
G
_
S
V_GND
MUTE_P
FL_IN
CNT_IN
FR_IN
SL_IN
FL_IN
CNT_IN
FR_IN
SL_IN
SR_IN
BSL_IN
BSR_IN
FL_FB1
+B
FL+SIG
FL_FB2
FL-SIG
-B
-B
SL-SIG
SL_FB2
SL+SIG
+B
SL_FB1
-B
FR-SIG
FR_FB2
FR+SIG
+B
FR_FB1
-B
CNT-SIG
CNT_FB2
CNT+SIG
+B
CNT_FB1
SR_FB1
+B
SR+SIG
SR_FB2
SR-SIG
-B
BSL_FB1
+B
BSL+SIG
BSL_FB2
BSL-SIG
-B
BSR_FB1
+B
BSR+SIG
BSR_FB2
-B
V_GND
FL-SIG
-B
-B
CNT-SIG
-B
-B
FR-SIG
-B
-B
SL-SIG
-B
-B
BSL-SIG
-B
-B
SR-SIG
-B
-B
BSR-SIG
-B
-B
BSR_FB2
BSR+SIG
+B
+B
BSR_FB1
SR_FB2
SR+SIG
+B
+B
SR_FB1
BSL_FB2
BSL+SIG
+B
+B
BSL_FB1
SL_FB2
SL+SIG
+B
+B
SL_FB1
FR_FB2
FR+SIG
+B
+B
FR_FB1
CNT_FB2
CNT+SIG
+B
+B
CNT_FB1
FL_FB2
FL+SIG
+B
+B
FL_FB1
MUTE_P
BSR-SIG
SIG2
CLIPPING_ON
CLIPPING_ON
HEAT
HEAT
2-56
2-57
SCHEMATIC DIAGRAM ( PRE-AMP PART )
Summary of Contents for T 748
Page 1: ...L A U N A M E C I V R E S AV Surround Sound Receiver T748 AV Surround Sound Receiver T748 ...
Page 6: ...DISASSEMBLY REMOVAL OF FRONT PANEL 1 6 ...
Page 7: ...PRINCIPAL PART LOCATION 1 7 ...
Page 18: ...IC 211 MX29LV32DTTI 70G FLASH OF DSP 2 6 ...
Page 19: ...2 7 ...
Page 29: ...2 17 BLOCK DIAGRAM ...
Page 40: ...IC 913 IC 918 TC74VCX541FT OCTAL BUS BUFFER 2 28 ...
Page 44: ...BLOCK DIAGRAM MCU DSP PART 2 32 2 33 ...
Page 45: ...BLOCK DIAGRAM AUDIO PART 2 34 2 35 ...
Page 46: ...BLOCK DIAGRAM HDMI PART 2 36 2 37 ...
Page 62: ...2 68 2 69 PRINTED CIRCUIT BOARD FRONT TOP VIEW ...
Page 63: ...2 70 2 71 FRONT BOTTOM VIEW ...
Page 64: ...2 72 2 73 INPUT TOP VIEW ...
Page 65: ...2 74 2 75 INPUT BOTTOM VIEW ...
Page 66: ...2 76 2 77 MAIN TOP VIEW ...
Page 67: ...2 78 2 79 MAIN BOTTOM VIEW ...
Page 68: ...2 80 2 81 SUB TOP VIEW ...
Page 69: ...2 82 2 83 SUB BOTTOM VIEW ...