Sanyo 28DN2F Service Manual
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Sanyo 28DN2F Service Manual

Sanyo 28DN2F Service Manual

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Colour Television
Service Manual
Model
C28ER56NF
(FRANCE)
Service Ref. No. C28ER56NF-01
PRODUCT CODE: 1113 27210
ORIGINAL VERSION: Chassis No. EB4-A
Note
This TV receiver will not work properly in foreign
countries where the television transmission system
and power source differ from the design specifications.
Refer to the specifications for the design specifications
Give complete "SERVICE REF. NO." for parts order or
servicing, it is shown on the rating sheet on the
cabinet back of the TV set.
Specifications
Power source
Television system
Colour system
Receiving channel
Aerial input impedance
AV terminal
21 Pin socket
21 Pin socket
Sound output(Cont.)
Picture tube
(Visible picture diagonal)
Dimensions (WxHxD)
Weight
Part No.
SKSM0189
AC 220~240V 50Hz
System B/G,L/L'/I
PAL,SECAM
VHF: E2-E12,F2-F10
CATV: X, Y, Z, S1-S41,B-Q
UHF: #21~69
75ohm
AV1 CENELEC (Full +YC)
AV2 CENELEC standard
5 watts X2
70cm diagonal, 90 degree
66cm
736 x 596 x 500mm
32 Kg
F3SLV
JUNE 1997
28DN2F

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  • Page 1 Colour Television 28DN2F Service Manual Model C28ER56NF (FRANCE) Service Ref. No. C28ER56NF-01 PRODUCT CODE: 1113 27210 ORIGINAL VERSION: Chassis No. EB4-A Note This TV receiver will not work properly in foreign countries where the television transmission system and power source differ from the design specifications.

  • Page 2: Safety Precaution

    SAFETY PRECAUTION 1: An isolation transformer should be connected in the 3: When replacing a chassis in the cabinet, always be power line between the receiver and the AC line when certain that all the protective devices are installed a service is performed on the primary of the converter properly, such as, control knobs, adjustment covers or transformer of the set.

  • Page 3: Block Diagram

    BLOCK DIAGRAM This is a diagram for all models and therefore differs slightly from the actual block diagram. F3SLV...

  • Page 4: Circuit Description

    CIRCUIT DESCRIPTION 1. POWER SUPPLY control) The chroma signal is divided into R-Y and B-Y The power supply circuit of the EB4-A chassis is chroma signals, demodulated in IC201, and output from composed of a rectifier smoothing circuit, an oscillation pin30 (R-Y) and pin31 (B-Y).

  • Page 5: Horizontal Output

    6. HORIZONTAL OUTPUT Pin25: Black A horizontal oscillation signal is output from pin37 of Pin26: IREF IC201 and switches the drive transistor Q431. This Pin27: Odd/Even output switching signal is current amplified by the drive Pin28: GND transformer T431 and drives the output transistor Q432. Pin29: - When Q432 becomes ON, an amplifying current flows Pin30: V-deflection stop output...

  • Page 6: Service Control Adjustment

    SERVICE CONTROL ADJUSTMENT VIF DET 1/2 AFT ADJ. B1 POWER SUPPLY ADJ. TU-AGC ADJ. MAIN BOARD HIGH VOLTAGE & H-WIDTH ADJ. FOCUS ADJ. V-CENTRE ADJ. V-SIZE ADJ. H-CENTRE ADJ. GREY SCALE ADJ. SIF ADJ.(FM Det-2) SIF BOARD SIF ADJ.(FM Det-1) T3852 T3851 T3853...
  • Page 7 B1 POWER SUPPLY ADJUSTMENT HIGH VOLTAGE & WIDTH ADJUSTMENT 1. Set VR641 to be mechanically centre before [HIGH VOLTAGE ADJUSTMENT] pressing the mains ON/OFF switch. 1. Tune the receiver to the circular pattern. 2. Tune the receiver to a PAL circular pattern. 2.

  • Page 8: Circuit Alignment

    CIRCUIT ALIGNMENT 10kΩ 0.002µF 103P 0.01uF 75Ω 1kΩ Jig-A Output probe Input probe VIF alignment (DETECTOR ADJ.1) Adjustment SETTING Waveform Notes How to select SYSTEM L or DC 15.0V IC651-pin1 By using T141, L’. AGC voltage (4.3-4.5V) IC201-pin48 adjust "P" to be Output probe (Side b) IC201-pin45 maximum...
  • Page 9 SIF alignment (FM Detector-2) SETTING Adjustment DC 12V K38H2-pin3 By using T3852, adjust DC DC5V IC3851-pin21 level to be 1.7V. Output probe IC3851-pin15 Input probe IC3851-pin16 Scope 100mV/div Carrier Frequency 5.5MHz Modulation Frequency 1KHz (Sine wave) System SETTING Adjustment DC 12V K38H2-pin3 By using T3851, adjust DC DC5V...
  • Page 10 INITIALISATION (Important Notice) When you replace a memory IC (IC802), it is 2. Select the desired service item by using the Function necessary to initialise the IC as following step. button on the remote control handset. 3. Change the data by using the Level + or - button A.
  • Page 11 HOLDER AC CORD-GBR-D4VA 610 260 0148 HOLDER RC GBR-BLFA 610 265 4202 HOLDER DC-F3SCM 610 261 3032 SPRING-E7GC 645 003 9256 BADGE,SANYO*46.2X13.5L45 610 133 2354 FIXER PURSE LOCK,D11.5(PA 645 005 0312 FIXER HOOK 610 104 2505 LATCH PUSH,7.9X6.9BK 610 224 5721...

  • Page 12: Chassis Electrical Parts List

    CHASSIS ELECTRICAL PARTS LIST Product safety should be considered when a component replacement is made in any area of a receiver. Components indicated by a ! mark in this parts list and the circuit diagram show components whose value have special significance to product safety.
  • Page 13 Description Ref. No. Part No. Ref. No. Part No. Description RESISTOR C3851 403 069 9500 CERAMIC 0.01U Z R2601 401 018 2800 CARBON 330 JA 1/4W C3852 403 069 9500 CERAMIC 0.01U Z R2602 401 019 1901 CARBON 3.9K JA 1/4W C3853 403 069 9500...
  • Page 14 Ref. No. Part No. Description Part No. Description Ref. No. 610 264 1479 C3465 403 018 7403 CERAMIC 220P J C3466 403 069 9500 CERAMIC 0.01U Z ASSY,PWB,AUDIO F3SL 1AA0B10E3250B C3467 403 041 8804 ELECT 10U M C3468 403 069 9500 CERAMIC 0.01U Z TRANSISTOR...
  • Page 15 Description Ref. No. Part No. Ref. No. Part No. Description R3479 401 038 3603 MT-GLAZE 3.3K JA 1/10W 405 019 1909 TR 2SC536-E-NP R3480 401 038 3603 MT-GLAZE 3.3K JA 1/10W 405 019 2708 TR 2SC536-F-NP R3481 401 038 0701 MT-GLAZE 2.2K JA 1/10W 405 019 3804...
  • Page 16 Ref. No. Part No. Description Part No. Description Ref. No. 405 019 3804 TR 2SC536-G-NP 405 019 1909 TR 2SC536-E-NP Q2001 406 007 2106 TR JC546A 405 019 2708 TR 2SC536-F-NP 406 007 2007 TR JC546B 405 019 3804 TR 2SC536-G-NP 405 019 1909 TR 2SC536-E-NP Q835...
  • Page 17 Description Ref. No. Part No. Ref. No. Part No. Description 403 237 7901 MT-COMPO 0.22U J C141 403 028 4409 CERAMIC 56P J C008 403 270 3403 MT-POLYEST 0.22U K C142 403 068 0409 CERAMIC 0.1U Z 403 237 7901 MT-COMPO 0.22U J 403 070 2606...
  • Page 18 Ref. No. Part No. Description Part No. Description Ref. No. C424 403 083 3409 POLYPRO 0.015U J 400V C645 403 158 1309 ELECT 2200U M C430 403 075 7101 CERAMIC 1000P K 500V C651 403 148 0305 ELECT 470U M C431 403 068 5602 CERAMIC...
  • Page 19 Description Ref. No. Part No. Ref. No. Part No. Description R1018 401 038 3504 MT-GLAZE 330 JA 1/10W R162 401 037 9101 MT-GLAZE 180 JA 1/10W R1021 401 038 7601 MT-GLAZE 560 JA 1/10W R163 401 038 6505 MT-GLAZE 47K JA 1/10W R1022 401 038 0701 MT-GLAZE...
  • Page 20 Ref. No. Part No. Description Part No. Description Ref. No. R447 401 026 9907 CARBON 4.7K JA 1/6W R812 401 038 5102 MT-GLAZE 3.9K JA 1/10W R448 401 009 5803 CARBON 330 JA 1/2W R813 401 026 4605 CARBON 33K JA 1/6W R451 401 064 5305...
  • Page 21 Description Ref. No. Part No. Ref. No. Part No. Description VR131 645 006 5422 VR,SEMI,10K N DIODE 610 239 7567 VR B-10K D1005 407 063 8309 ZENER DIODE MTZJ11C VR361 645 006 5422 VR,SEMI,10K N 407 158 3400 ZENER DIODE UZ-11BSC 610 239 7567 VR B-10K D1007...
  • Page 22 Ref. No. Part No. Description Part No. Description Ref. No. 407 013 1008 DIODE 1S1553 409 057 5103 IC UPC574J 407 013 4306 DIODE 1S2076A D681 407 005 7308 DIODE EM01Z 407 013 6508 DIODE 1S2471 D682 407 053 6803 ZENER DIODE MTZ5.6C D445 407 012 4406...
  • Page 23 Description Ref. No. Part No. Ref. No. Part No. Description -23-...
  • Page 24 Some voltages may vary with sulla massa del chassis, i valori di voltag- lare importanza per il sicuro funziona- ficato altrimenti. 28DN2F/C28ER56NF cance to product safety. It is particu- Number: signal strength. gio presi usando un segnale di barre col- Il transistore 2SA608(E,F) puo essere mento del TV.
  • Page 25 Main Board /Pannello Principal Circuit side/Lato del Circuito C3461 R3469 FRONT-IN KZ0.01FA 1/10 GJ33K C3494 L3455 K12A L2A22R2KN 16EM47 J10EA020N VCONT VDDF1 C3462 16EM C3493 MIXREF VCLK 0.01FA C3458 R3461 K12B 1/10 J10EA 390BA GJ1K R1251 050N DQPSK VSSF1 1/10 C3463 GJ2.7K R3462...
  • Page 26 J1EK1745- K1002 :J11B0490N ASSY,PWB,CRT F2RC Waveforms on ICs and Transistors 1AA0B10E24500 L2601 Q2601 R2604 L1022 L2C1 IC201-pin7 IC201-pin15 IC201-pin18 IC201-pin19 IC201-pin20 2SC2688'1' B-OUT Z21B0040N 2SJ12K 331KN <CVBS out> <CVBS in> <B out> <G out> <R out> (K:L:M) :2SC2621 L1023 L1024 L1025 L1026 <B-DRIVE>...
  • Page 27 Main Board /Pannello Principal Component Location/Lato del Componente GENERAL BLOCK DIAGRAM FOR EB4 CHASSIS Audio- Video- Audio- SW1901 SW1902 SW1904 SW1903 IC801 input-R input-L Headphones Audio In Video In Prog.+ Prog.- input Vol.- 21P Scart: AV1 21P Scart: AV2 Vol.+ RC Pre.amp Control Keys Audio I/O...

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