ERISSON SF21GA63, Service Manual

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SERVICE MANUAL
14
2. CHASSIS DESCRIPTION
General Description
ETA-1 chassis is applied in SF21GA63 series.
By use of Toshiba V/C/D-MCU 2IN1 IC for TV small signal processing and bus control,
the chassis enables TV tuning, adjustment, control and picture correction, featuring
high-integration, high-performance-to-price ratio and high-reliability and compact circuit
with fewer external components. The chassis, widely used in small and medium TVs,
provides much more convenience for manufacturing and technical service. It includes:
●
2IN1 IC TMPA8873PSANG-4VB6 for PAL/NTSC small signal processing and bus control
●
EEPROM AT24C16 for data memory
●
LA78040 for vertical output power amplifying
●
TFA9842AJ for audio power amplifying
●
Thick-film IC STR-G5653 for power circuit adjustment and control
The following features are available in the chassis:
●
Color systems:
PAL-M
,
PAL-N,
NTSC
●
Sound systems: M
●
236 programs preset
●
AV stereo
●
I
2
C bus control
●
Electronic program table
●
Intelligent lock
●
Biorhythm
The chassis mainly uses the following ICs and assemblies.
Table 5 Key ICs and Assemblies
Serial
No. Position Type
Description
1 N201 AT24C16 EERPOM
2 N202
GDET010
3
-0
5
(TMPA8873PS
B
NG)
2IN1 IC (Small signal pro
micro control unit (MCU))
3 N603 TFA9842AJ Audio power amplifier
4 N301 LA78040 Vertical scan output stage circuit
5 N801 STR-G5653
Switch-mode power supply
control
6 A001
TDQ-6F2-M
Tuner