Chassis Description - Changhong Electric 21NF55 Service Manual

3. CHASSIS DESCRIPTION

1). General Description
EX-1A1 chassis series are applied in 21NF55/21PF93 respectively which uses mainly Philips'
advanced UOC-ultimate chip TDA935X/6X/8X and I
microcontroller and small signal processor, the TDA935X/6X/8X series feature high-integration,
high-performance-to-price ratio and high-reliability and advanced functions with fewer external
components, which provide much convenience for manufacturing and technical service.
2). The EX-1A1chassis series mainly use the following ICs and assemblies.
Serial
Position
No.
1 N100
2 N200
3 N401
4 N402
5 N600
6 N650
7 N861
8 A100
SERVICE MANUAL
Table 3 Key ICs and Assemblies
Type Function Description
CH05T0101
Microcontroller and small signal processor (UOC)
(TDA935X/6X/8X)
AT24C08 EEPROM
TDA8356/N6 Vertical scan output stage circuit
HEF4053 Analog switch
TDA7057AQ Sound power amplifier
TDA7449 Sound processor
STR-G5653 Power supply circuit
TDQ-5B6M Tuner
2
C-bus controlled IC. With combination of
16