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Sansui DTV2798A Service Manual

27" mts stereo, with digital tuner
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SERVICE MANUAL
27" MTS STEREO COLOR TELEVISION
WITH DIGITAL TUNER
DTV2798A
This SUPPLEMENT must be used together with SERVICE MANUAL for DTV2798.
All other test and repair procedures are as shown in the ORIGINAL MANUAL.
Please file this SUPPLEMENT with the ORIGINAL VERSIONS.
All the specifications and features are subject to change without notice.
S/M CODE NO. M33A14SASM
SUPPLEMENT
DATE OF ISSUE 07/2008
VERSION (C)

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Summary of Contents for Sansui DTV2798A

  • Page 1 SERVICE MANUAL 27" MTS STEREO COLOR TELEVISION WITH DIGITAL TUNER DTV2798A This SUPPLEMENT must be used together with SERVICE MANUAL for DTV2798. All other test and repair procedures are as shown in the ORIGINAL MANUAL. Please file this SUPPLEMENT with the ORIGINAL VERSIONS.
  • Page 2 MECHANICAL REPLACEMENT PARTS LIST DTV2798 DTV2798A REF. NO. PART NO. DESCRIPTION PART NO. DESCRIPTION 7A701B180A FRONT CABI ASS'Y 7A701B195A FRONT CABI ASS'Y 101A 701WPJD719 CABINET FRONT 701WPJD738 CABINET FRONT 101C 713WPA0239 GUIDE REMOCON 713WPA0218 GUIDE REMOCON 101D 735WPAA484 BUTTON,ASS'Y 735WPA0692...

  • Page 3: When Replacing Eeprom (Memory) Ic

    WHEN REPLACING EEPROM (MEMORY) IC CONFIRMATION OF CHECK SUM, POWER ON TOTAL HOURS, MICON VERSION AND DIGITAL TV MICON FIRMWARE VERSION Initial total of MEMORY IC, POWER ON total hours, MICON VERSION and Digital TV MICON Firmware VERSION can be checked on the screen.
  • Page 4 POWER2 SCHEMATIC DIAGRAM (DIGITAL PCB) DTV_ASIC IC2401 R8A66953FP (1/5 POWER) VDD33 VCCQ33 VSSQ33 VCCQ33 VSSQ33 VCCQ33 VSSQ33 VCCQ33 VSSQ33 VCCQ33 VSSQ33 VCCQ33 VSSQ33 VCCQ33 VSSQ33 VCCQ33 VSSQ33 VCCQ33 VSSQ33 REGULATOR IC VDD25 IC2408 BA00HC5WF VCCQ25 VSSQ25 R2487 3.32 VCCQ25 VSSQ25 VCCQ25 VSSQ25 D2401...
  • Page 5 SDRAM SCHEMATIC DIAGRAM (DIGITAL PCB) FROM AV OUT DTV_ASIC IC2401 R8A66953FP (2/5 MEMORY) VDD25 NR2401 4D02WGJ0470TCE SDA3 SSDA3 SDA3 Bypass cap. Place near SDRAM per VDD pin. SDA2 SSDA2 SDA2 SDA1 SSDA1 SDA1 C2450 SDA0 SSDA0 SDA0 0.1 B SDA10 NR2402 4D02WGJ0470TCE SSDA10...
  • Page 6 FLASH SCHEMATIC DIAGRAM (DIGITAL PCB) DTV_ASIC IC2401 R8A66953FP (3/5 FLASH) Closed to Flash Memory FROM AV OUT NR2410 4D02WGJ0220TCE MD15 VDD33 WAIT_N RESET_N MD14 NR2411 4D02WGJ0220TCE MD13 MD12 D_GND NR2412 4D02WGJ0220TCE MD11 2Mx16 NOR FLASH Firm wrote IC2403 K8D3216UTC-PI07 MD10 AA16 AA17 AA15...
  • Page 7 ADC&DAC SCHEMATIC DIAGRAM (DIGITAL PCB) DTV_ASIC IC2401 R8A66953FP (4/5 ADC&DAC) R2436 IF filter W805 ADVREF0 REXT2 560 +-1% ADVREF1 FROM AV OUT ADVREF2 R2430 C2467 R2440 IF_P COUT 0.01 ADIN1 FROM/TO AV OUT ADIN0 R2433 C2468 IF_N VCCADA_A VDD33_2 0.01 AGND VSSDDA_A VSSADA_A...
  • Page 8 AV OUT SCHEMATIC DIAGRAM Spurious filter LEVEL SHIFT Place circuit near connector Q2401 (DIGITAL PCB) KTK5132E B2404 TU_I2C_CLK SICL0 FCM1608KF-102T02 LEVEL SHIFT Pull up Resistor Q2402 KTK5132E B2405 R2482 DTV_ASIC I2C_BUS_SW TU_I2C_DATA SIDA0 IC2401 R8A66953FP (5/5 GPIO) 5.6K FCM1608KF-102T02 R2483 SICL0 I2C_BUS_SW 5.6K...
  • Page 9 WAVEFORMS DEFLECTION POWER ON 20µs 10µs 200mV 10.0V AV SWITCH/SOUND AMP 20µs 20µs 20µs 200mV CHROMA DEFLECTION 10µs 10ms 20µs 200mV 0.5V MICON 2µs 50µs 50µs 20µs 20µs 0.1ms NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram.
  • Page 10 WAVEFORMS DEFLECTION 50µs 200V AV SWITCH/SOUND AMP 20µs 200mV 20µs 20µs 20µs NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram.

  • Page 11: Mechanical Exploded View

    MECHANICAL EXPLODED VIEW 102B 102B PCB110 (CRT PCB ASS'Y) 102A 102B PCBDH0 (DIGITAL PCB ASS'Y) PCB070 (TV MT PCB ASS'Y) 101F 101E 101D 101E 101C 101E 101A 101B...

  • Page 12: Mechanical Replacement Parts List

    MECHANICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION 7A701A916A FRONT CABI ASS'Y 101A 701WPJD464 CABINET FRONT 101B 723465A005 BADGE BRAND 101C 713WPAA170 GUIDE,REMOCON 101D 735WPBB491 BUTTON ASS'Y 101E 800WQ00103 FELT SHEET 9x250xT0.3 101F 800WQ0A068 FELT SHEET 7A702A336A BACK CABI ASS'Y 7A702A495A BACK CABI ASS'Y 102A...

  • Page 13: Electrical Replacement Parts List

    ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION REF. NO. PART NO. DESCRIPTION RESISTORS RESISTORS R001 R803R9101J 100 OHM 1/16W R405 R803R9223J 22K OHM 1/16W ! R002 R803R9101J 100 OHM 1/16W R406 R002T2331J 330 OHM 1/2W R003 R803R9151J 150 OHM 1/16W R407 R4X5T6562F R,METAL...
  • Page 14 ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION REF. NO. PART NO. DESCRIPTION RESISTORS RESISTORS R604 R002T4101J 100 OHM 1/4W R901 R803R9822J 8.2K OHM 1/16W R605 R002T4333J 33K OHM 1/4W R902 R803R9472J 4.7K OHM 1/16W R606 R002T4101J 100 OHM 1/4W R904 R803R9101J 100 OHM 1/16W...
  • Page 15 ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION REF. NO. PART NO. DESCRIPTION RESISTORS CAPACITORS R2472 R808R9153J 15K OHM 1/16W C141 CQGTCH4L1J CC PF 50V CH R2473 R808R9153J 15K OHM 1/16W C142 CS0PB0N16K CC UF 10V B R2474 R808R9103J 10K OHM 1/16W C143 CS0PCH412J...
  • Page 16 ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION REF. NO. PART NO. DESCRIPTION CAPACITORS CAPACITORS C524 CQGTB04K3K CC .0027UF 50V B C908 CS0PB0315K 0.1 UF 25V B ! C527 E7EPF2222M 2200 UF 16V C909 E70QU3100M CE UF 25 V ! C534 CRGTB04H3K CC 0.0022UF 50V B...
  • Page 17 ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION REF. NO. PART NO. DESCRIPTION CAPACITORS CAPACITORS C2449 CS0UB0N15K CC 0.1 UF 10V B C2547 CT7RC0P17M CC UF 6.3V C C2450 CS0UB0N15K CC 0.1 UF 10V B C2548 E62YM2101D 100 UF 16V C2451 CS0UB0N15K CC 0.1 UF 10V B...
  • Page 18 ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION REF. NO. PART NO. DESCRIPTION COILS &TRANSFORMERS IC602 I0QF022830 A/V SW 2INPUT 1 OUTPUT NJM2283M(TE1) T401 0450190171 TRANS,HORIZONTAL DRIVE ETH19Y206AY IC701 I0QF027500 4INPUT 1OUTPUT AUDIO SW NJM2750M(TE1) ! T501 0481350994 TRANSFORMER,SWITCHING 81350994 JACKS IC901...
  • Page 19 ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION MISCELLANEOUS NR2403 110P4470M5 R,NETWORK 4D02WGJ0470TCE NR2404 110P4470M5 R,NETWORK 4D02WGJ0470TCE NR2405 110P4470M5 R,NETWORK 4D02WGJ0470TCE NR2406 110P4470M5 R,NETWORK 4D02WGJ0470TCE NR2407 110P4470M5 R,NETWORK 4D02WGJ0470TCE NR2408 110P4470M5 R,NETWORK 4D02WGJ0470TCE NR2409 110P4470M5 R,NETWORK 4D02WGJ0470TCE NR2410 110P4220M5 R,NETWORK 4D02WGJ0220TCE NR2411...
  • Page 20 HOW TO ORDER PARTS When placing a parts order, please have the following information. MODEL NUMBER and VERSION NUMBER Located on the back of the unit. EX: VR0100 (Model no.), VERSION/A (Version no.) PART NO. and DESCRIPTION Located in your SERVICE MANUAL. (See pages M1-1~M2-7) EX: I235953420, STK5342, Voltage Regulator PART NO.
  • Page 21 ORION SALES, INC. HIGHWAY 41 ORION PLACE PRINCETON, INDIANA 47670...