akira CT-21LPS1MKI/ANZ User manual

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Model No: CT-21LPS1MKI-ANZ
Version 1.0
CHASSIS: TD171
MODEL: CT-21LPS1MKI/ANZ

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Model No: CT-21LPS1MKI-ANZ
Version 1.0
CONTENT
SAFETY NOTICE ...................................................................................................................................4
GENERAL DESCRIPTION ....................................................................................................................5
TECHNICAL SPECIFICATION.............................................................................................................5
GENERAL SPECIFICATION.................................................................................................................6
CHASSIS BLOCK DIAGRAM...............................................................................................................7
FAULT FINDING TREES.......................................................................................................................8
IC BLOCK DIAGRAM .........................................................................................................................15
ADJUSTMENT MODE.........................................................................................................................64
EXPLODED VIEW AND PART LIST .................................................................................................66
BOM LIST .............................................................................................................................................67
CIRCUIT DIAGRAM............................................................................................................................73

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Model No: CT-21LPS1MKI-ANZ
Version 1.0
SAFETY NOTICE
SAFETY PRECAUTION
1. An isolation transformer should be connected in the power line between the receiver and the AC
line when a service is performed on the primary of the converter transformer of the set.
2. Comply with all caution and safety-related notes provided on the cabinet back, inside the cabinet,
on the chassis or the picture tube.
3. When replacing a chassis in the cabinet, always be certain that all the protective devices are
installed properly, such as, control knobs, adjustment covers or shields, barriers, isolation resistor-
capacitor networks etc.. Before returning any television to the customer, the service technician
must be sure that it is completely safe to operate without danger of electrical shock.
X-RADIATION PRECAUTION
The primary source of X-RADIATION in television receiver is the picture tube. The picture tube is
specially constructed to limit X-RADIATION emissions. For continued X-RADIATION protection,
the replacement tube must be the same type as the original including suffix letter. Excessive high
voltage may produce potentially hazardous X-RADIATION. To avoid such hazards, the high voltage
must be maintained within specified limit. Refer to this service manual, high voltage adjustment for
specific high voltage limit. If high voltage exceeds specified limits, take necessary corrective action.
Carefully follow the instructions for +B1 volt power supply adjustment, and high voltage check to
maintain the high voltage within the specified limits.
PRODUCT SAFETY NOTICE
Product safety should be considered when a component replacement is made in any area of a receiver.
Components indicated by mark in the parts list and the schematic diagram designate components in
which safety can be of special significance. It is particularly recommended that only parts designated
on the parts list in this manual be used for component replacement designated by mark. No deviations
from resistance wattage or voltage ratings may be made for replacement items designated by mark.

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Model No: CT-21LPS1MKI-ANZ
Version 1.0
GENERAL DESCRIPTION
AKTP01/02 chassis series are applied A14T02/A14T02a respectively which uses mainly TOSHIBA’
advanced UOC-ultimate chip TMPA8803/8821/8851 and I2C-bus controlled IC with combination of
micro controller and small signal processor, the TMPA8803/8821/8851 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.
Table 1: A14T02 mainly ICs and functions
Position Type Function Description Remark
N204 8851CPNG6EG1 Micro controller and small signal
processor (UOC)
V501 Driver Transistor (C4460) Power Supply
T501 BCK-65-10 D3 Isolate Transformer
A101 ET-5C1E-EV200K Tuner
T402 BSC25-05N2135 FlyBack Transformer
N701 TA1343NG Sound Processor
N702 TDA7496SA Sound power amplifier
N402 STV9302 Vertical Scan Output Stage Circuit
V411 TT2496 Horizontal Driver TST
N901 ATMEL 24C16 EEPROM IC
Z101 K2955 Saw Filter
N203/N207 TC4053 AV1/AV2 Switch
TECHNICAL SPECIFICATION
Test Item Conditional TD171
AC Operating
Range
RF&AV signal input with sound loud speaker
(volume maximum) & Picture set in Dynamic
mode 115Vac ~ 240Vac
Philips or Mono-scope pattern signal with howling
sound Contrast & Brightness set in Maximum,
sound increase maximum 100Watts
Total Power
Consumption
Standby Mode 14 Watts
Brightness & contrast set in Maximum Min: 26.2KVdc
Typical Design value Average: 26.5KVdc
EHT
Brightness &contrast Minimum Max: 27.8KVdc
Anode Current Brightness &contrast Maximum IABL = 1.08mA
Heater Voltage TV operate normally V Heater = 6.2Vac
B+Normal operating VB+= 112Vdc
Sound power
output
RF signal input broadcasting at
217.25MHz/BG/DK(1KHz)
Volume is maximum
V = 9.2Vrms
P = 10Watts X 2