Akira 21WHS3 Service Manual

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10 Model No: 21WHS3-BnVersion 1.0 ADJUSTMENT MODE Item B+ adjustment, TV signal receiving AKPH01 chassis Measuring Equipment TV SG

11 Model No: 21WHS3-BnVersion 1.0 Item TV system adapting & AV in/output inspection AKPH01 chassis Measuring Equipment SG (with NT

12 Model No: 21WHS3-BnVersion 1.0 To be fine H.

13 Model No: 21WHS3-BnVersion 1.0 Item RF. AGC adjustment AKPH01 chassis Measuring Equipment SG and digital multi meter service re

14 Model No: 21WHS3-BnVersion 1.0 Item OSD position adjustment AKPH01 chassis Measuring Equipment service remote controller Prepa

15 Model No: 21WHS3-BnVersion 1.0 CHASSIS BLOCK DIAGRAM HEATFOCUS EH

16 Model No: 21WHS3-BnVersion 1.0 FAULT FINDING TREES A Three-None(no raster, no picture, no sound) This failure is mainly caused by big-powe

17 Model No: 21WHS3-BnVersion 1.0 B Two-None (no picture, no sound) The failure shows that the set does not display the picture but it has n

18 Model No: 21WHS3-BnVersion 1.0 YES 0V ＞3.8V ＜2V Exam the voltage of “ AGC ” on A101

19 Model No: 21WHS3-BnVersion 1.0 5. No sound In this kind of failure, first of all we should observe if there is the picture on the CRT. It pr

2 Model No: 21WHS3-BnVersion 1.0 MMMooodddeeelll::: 222111WWWHHHSSS333///BBBNNN CCChhhaaassssssiiisss::: UUUOOOCCC---TTTDDDAAA999

20 Model No: 21WHS3-BnVersion 1.0 C Only horizontal line in the middle of the screen: If vertical deflection circuit does not work, this ki

21 Model No: 21WHS3-BnVersion 1.0 D Only vertical line in the middle of the screen This is a dangerous failure. It probable causes flashov

22 Model No: 21WHS3-BnVersion 1.0 E UOC does not work In television, remote-control system is similar with the computer system. In theory ,

23 Model No: 21WHS3-BnVersion 1.0 IC BLOCK DIAGRAM Fig 1: UOC-TDA9381 Illustration

24 Model No: 21WHS3-BnVersion 1.0 MAIN CHIP INSTRUCTION Pin 1 Standby control, “1” is on, “0” is off. Pin 2 SCL Pin 3 SDA Pin 4 Tuning PWM ou

25 Model No: 21WHS3-BnVersion 1.0 Pin 36 EHT tracking /over voltage protection. If something is wrong, the anode high voltage rise the heater vo

26 Model No: 21WHS3-BnVersion 1.0 Fig 2: HEF4052BP Illustration

27 Model No: 21WHS3-BnVersion 1.0 FUNCTION TABLE OF N4052 Input Ē A1 A0 Channel On L L L Y0A – ZA; Y0B – ZB L L H Y1A – ZA; Y1B – ZB L H L Y2

28 Model No: 21WHS3-BnVersion 1.0 IC N402 <VERTICAL OUTPUT> LA78040 (or STV9302)

29 Model No: 21WHS3-BnVersion 1.0

3 Model No: 21WHS3-BnVersion 1.0 CONTENTS SAFETY NOTICE ...

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4 Model No: 21WHS3-BnVersion 1.0 SAFETY NOTICE WARNING: BEFORE EXAMINING AND SERVICING THIS CHASSIS, READ CAREFULLY THE FOLLOWING SAFETY INSTRU

40 Model No: 21WHS3-BnVersion 1.0 1 Inverting input 2 Vcc 3 Pump up out 4 GND 5 VER output 6 Output stage Vcc 7 Non inv. Put

41 Model No: 21WHS3-BnVersion 1.0 Fig 4 AN7522N Illustration

42 Model No: 21WHS3-BnVersion 1.0

43 Model No: 21WHS3-BnVersion 1.0

44 Model No: 21WHS3-BnVersion 1.0 Fig 5: KA5Q0765RT Illustration

45 Model No: 21WHS3-BnVersion 1.0 FACTORY MENU Main power +B setting Receive standard color pattern RF signal. Set picture to “Standard Mode”. Adj

46 Model No: 21WHS3-BnVersion 1.0 MI Items Variable Preset M4 SUBCON 0~63 63 SUBCOL 0~63 63 SUBSHP 0~63 63 SUBTINT 0~15 15 YDLY

47 Model No: 21WHS3-BnVersion 1.0 Directions for use 1. M1/AV CFG： Mode Function select 0 TV→AV 1 TV→AV1→AV2 2 TV→AV1→AV2→S-VIDEO 3 TV→AV1→AV2

48 Model No: 21WHS3-BnVersion 1.0 EXPLODED VIEW AND PART NAME

49 Model No: 21WHS3-BnVersion 1.0 BOM LIST Ref. No Part No. Name Specification R411 RJB393F-NAAF Resistor metal Rj13-1/6W-39KΩ-F R312 D10B683

5 Model No: 21WHS3-BnVersion 1.0 4. When replacing a burnout fuse, use the one with the same specifications as the original. 5. When replacing o

50 Model No: 21WHS3-BnVersion 1.0 Ref. No Part No. Name Specification R1517 D10B471J-T Carbon resistor RT13-1/6W-470Ω±5% R316 D10B681J-T Car

51 Model No: 21WHS3-BnVersion 1.0 Ref. No Part No. Name Specification R163 D10B103J-T Carbon resistor RT13-1/6W-10KΩ±5% R380 D10B103J-T Carbo

52 Model No: 21WHS3-BnVersion 1.0 Ref. No Part No. Name Specification R539 D10C513J-T Carbon resistor RT14-1/4W-51KΩ±5% R539A D10C513J-T Car

53 Model No: 21WHS3-BnVersion 1.0 Ref. No Part No. Name Specification C732 C2BF471K-T Ceramic capacitor CC1-06A-RH-50/63V-470pF-J C381 C2BF56

54 Model No: 21WHS3-BnVersion 1.0 Ref. No Part No. Name Specification C363 E20C100M-T Electrolytic Capacitor CD110-16V-10uF –M C364 E20C100M-T

55 Model No: 21WHS3-BnVersion 1.0 Ref. No Part No. Name Specification C466 E21H4R7M-T Electrolytic Capacitor CD110-160V-4.7uF -M C528B E20H

56 Model No: 21WHS3-BnVersion 1.0 Ref. No Part No. Name Specification VD911 DR0001XX-T Diode IS1555/IN4148A VD921 DR0001XX-T Diode IS1555/

57 Model No: 21WHS3-BnVersion 1.0 Ref. No Part No. Name Specification V913 RXC421X Audion BF421/BF423 V923 RXC421X Audion BF421/BF423 V933

58Model No: 21WHS3-BnVersion 1.0CIRCUIT DIAGRAM

6 Model No: 21WHS3-BnVersion 1.0 GENERAL DESCRIPTION AKPH02 chassis series are applied in A14P01/A21P01 respectively which uses mainly Philips’

7 Model No: 21WHS3-BnVersion 1.0 TECHNICAL SPECIFICATION Test Item Conditional TD171 AC Operating Range RF&AV signal input with sound loud

8 Model No: 21WHS3-BnVersion 1.0 GENERAL SPECIFICATION 14” 70W MAX Power consumption 21” 90W MAX Receive system DK/BG/I Color system PAL/ SECAM

9 Model No: 21WHS3-BnVersion 1.0 SAFETY CAUTIONS FOR PRODUCTS Many electric and mechanical components in AKPH01 chassis have special safety perf