Philips DPTV565 AA Service Manual page 108

EN 108 9. DPTV565 AA
9.7.9 Diagram S7, TDA7490 (IC7700)
Internal Block Diagram
INPUT 10
PRE
R63
4.7K
PRE
18
Pin Configuration
1
Circuit Descriptions, List of Abbreviations, and IC Data Sheets
R5 52.3K
470pF 470pF
C40 C41
R4
68K
7 9
-
Int. PWM-stage
+
+
Int. PWM-stage
-
19 17
470pF 470pF
C60 C59
R61
68K
R62 52.3K
Figure 9-53 Internal block diagram and pin configuration
The LC filter is optimized for 8Ω
(<->LC filter for 4Ω in single-ended)
It hos to be changed for other loads
L9 30µ
3
C26
470nF
(common
C23
235nF
R27
10
R28
10
C24
235nF
C29
470nF
23
L10 30µ
25
E_15000_124.eps
dumping
mode)
R25
Rload
170305