akira CT-21XF9 User manual

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Model No: CT-21XF9A
Version 1.0
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CHASSIS: CN-9EA
MODEL:
CT-21XF9A

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Model No: CT-21XF9A
Version 1.0
CONTENT
Specifications .......................................................................................4
General description ..............................................................................5
Safety instructions .............................................................................. 11
Circuit adjustments ....................….................................................... 12
Set-up adjustment .............................................................................. 13
Service mode general instructions ...................................................... 15
Service mode adjustment ................................................................... 19
Main repairing flow diagram .............................................................. 20
Main ICs description and repair data offering .................................... 26
Spare parts list .………………………………………………………..46
Appendix:
Exploded view 21BM32/21BM31…..………………………………...68
Circuit diagram ……………………………………………………….73
Print lay-out of main board …………………………………………...74

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Model No: CT-21XF9A
Version 1.0
SPECIFICATIONS
RF system: Color system: PAIA.43, NTSC3.58, NTSC4.43, PAL-M, PAL-N
Sound system: D/K, I, M, B/G
Video system: PAL4.43, NTSC4.43, NTSC3.58, PAL-M, PAL-N (50/60Hz)
Receiving channel: VHF: Cl~C12 (49.75 ~ 85.25MHz, 168.25 ~ 216.25MHz)
UHF: C 13~C57 (471.25 ~ 863.25MHz)
CATV: Zl~Z7 (111.0 ~ 167.0MHz)
Z8~Z35 (223.0~447.0MHz)
Programs Preset: 236
Antenna. input: 75Ù (imbalance)
Picture tube: Effective screen dimension: 406mmx305mm; Flat-square tube
Audio output: Main channel: 5W+5W (THD=7%)
Power supply: AC 150~260V (50Hz)
Weight: ~26kg
Dimensions: 566mm(w) x 455mm(h) x 480mm(d)
Power consumption: ~87W (AC 220V 50Hz)

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Model No: CT-21XF9A
Version 1.0
GENERAL DESCRIPTION
Figure 1 shows the block diagram of CN-9 (21BM32).
Table 1 provides CN-9EA chassis main ICs and functions.
Figure 2 shows the whole set power supply system for CN-9EA chassis.
Figure 3 shows the system control circuit of CN-9EA chassis.
Table 1: 21BS32EA mainly ICs and functions
Location Type Mainly function
N001 CH08T0934 System control microprocessor
N002 AT24C08-10PI Memory
N945 HS0038A Remote control receiver
NM01 TC9028F-022 Remote control transmitter
N101 LA7910 Band decoder
N202 HEF4052 Sound system switching
N201 TB 1238AN
Small signal processing
(IF/VIDEO/CHROMA/DEF)
N401 TA8403 Vertical output power amplifier
N601 TDA7057AQ Audio power amplifier
N701 TA1275AZSECAM decoder
N602 HCF4066BE Audio TV/AV switching
NS01 TDA7449 Audio processor
NT01 SAA5261 Teletext processor
NT02 PCF8582 Memory