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21
Plasma TV Service Manual
14/03/2005
55
30
-
29
22
NC
LV
Not connected
56
29
25
28
21
DACM_L
OUT
LV
Loudspeaker out, left
57
28
24
27
20
DACM_R
OUT
LV
Loudspeaker out, right
58
27
23
26
19
VREF2
OBL
Reference ground 2
59
26
22
25
18
DACA_L
OUT
LV
Headphone out, left
60
25
21
24
17
DACA_R
OUT
LV
Headphone out, right
-
-
-
23
-
NC
LV
Not connected
-
-
-
22
-
NC
LV
Not connected
61
24
20
21
16
RESETQ
IN
OBL
Power-on-reset
62
23
-
20
15
NC
LV
Not connected
63
22
-
19
14
NC
LV
Not connected
64
21
19
18
13
NC
LV
Not connected
65
20
18
17
12
I2S_DA_IN2
IN
LV
I
2
S2-data input
66
19
17
16
11
DVSS
OBL
Digital ground
-
-
-
15
-
DVSS
OBL
Digital ground
-
-
-
14
-
DVSS
OBL
Digital ground
67
18
16
13
10
DVSUP
OBL
Digital power supply 5V
-
-
-
12
-
DVSUP
OBL
Digital power supply 5V
-
-
-
11
-
DVSUP
OBL
Digital power supply 5V
68
17
15
10
9
ADR_CL
OUT
LV
ADR clock
12.18. TDA8928
12.18.1. Description
The TDA8928J is a switching power stage for a high efficiency class-D audio power amplifier system.
With this power stage a compact 2 x 10 W self oscillating digital amplifier system can be built, operating
with high efficiency and very low dissipation. No heatsink is required. The system operates over a wide
supply voltage range from +-7.5 V up to +-30 V and consumes a very low quiescent current.
12.18.2. Features
•
Wide Supply Voltage Range (Up to±25V ABS Max.)
•
Split Supply
•
High Output Power
•
25 + 25W @THD =10%,
RL
= W,
V
S= +20V
•
No Popat Turn-On/Off
•
Mute (Pop Free)
•
Stand-By Feature (Low
I
q)
•
Short Circuit Protection
•
Thermal Overload Protection
12.18.3. Pin Connection
Summary of Contents for HPT-4205
Page 1: ...42 PLASMA TV Built in Tuner SERVICE MANUAL...
Page 56: ...54 Plasma TV Service Manual 14 03 2005 15 CIRCUIT DIAGRAMS...
Page 57: ...55 Plasma TV Service Manual 14 03 2005...
Page 58: ...56 Plasma TV Service Manual 14 03 2005...
Page 59: ...57 Plasma TV Service Manual 14 03 2005...
Page 60: ...58 Plasma TV Service Manual 14 03 2005...
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Page 63: ...61 Plasma TV Service Manual 14 03 2005...