SITRONICS 25F83, Service Manual

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SERVICE MANUAL
3. Chassis Description
General Description
CH-16(S) chassis is applied in 25F83/PF2583/PF29F83, which mainly uses Philips’ advanced
UOC-ultimate one chip TDA938X and I
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C-bus controlled IC. With combination of
microcontroller and small signal processor, the TDA938X features high-integrity,
high-performance-to-price ratio and high-reliability and advanced functions with fewer external
components, which provide much more convenience for manufacturing and technical service.
In addition, TDA938X is good in geometric distortion, more suitable for pure flat TV sets.
The following features are available in the chassis:
·
PAL/NTSC/SECAM reception
·
Real time clock/Child lock/Alarm/Electronic program guide
·
Auto identification of video signal source
·
Auto identification of color/audio system
·
AV input/output
·
CCD/V-CHIP
·
PAL/NTSC D-COMB
·
HI-FI stereo
·
Surround
The chassis mainly uses the following ICs and assemblies.
Table 6 Key ICs and Assemblies
Serial No. Position Type Function Description
1 N100 TDA9384 (CH05T1610) Microcontroller and small signal processor (UOC)
2 N200 AT24C08 EEPROM
3 N606 TDA9859 Audio processor
4 N400 TDA8350Q-N6 Vertical scan output stage circuit
5 NY01 TDA6107Q Video amplifier (for PF29F83 only)
6 N801 STR-F6454R Power module
7 N350 HEF4503BP Electronic switch circuit
8 N600 TDA7057Q Sound power amplifier
9 NW01 TDA7056B Audio amplifier (for PF29F83 only)
10 NW02 TA75558P Dual operational amplifier (for PF29F83 only)
11 A100 TDQ-5B6-M Tuner
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