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Siemens Nixdorf MCM 21T1 Service Manual

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MCM 21T1

SERVICE MANUAL

AEP Model
Chassis No. SCC-L04S-A
N3
CHASSIS
SPECIFICATIONS
COLOR Monitor

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Summary of Contents for Siemens Nixdorf MCM 21T1

  • Page 1: Service Manual

    MCM 21T1 SERVICE MANUAL AEP Model Chassis No. SCC-L04S-A CHASSIS SPECIFICATIONS COLOR Monitor...
  • Page 2 MCM 21T1 SAFETY CHECK-OUT After correcting the original service problem, perform the fol- LEAKAGE TEST lowing safety checks before releasing the set to the customer: The AC leakage from any exposed metal part to earth ground 1. Check the area of your repair for unsoldered or poorly-sol- and from all exposed metal parts to any exposed metal part hav- dered connections.
  • Page 3 POWER SAVING FUNCTION This monitor meets the power-saving guidelines set by VESA and Note Energy Star, as well as the more stringent NUTEK . If no video signal is input to the monitor, the “NO INPUT SIG- If the monitor is connected to a computer or video graphics board NAL”...

  • Page 4: Timing Specification

    TIMING SPECIFICATION MODE AT PRODUCTION MODE 1 MODE 2 MODE 3 MODE FOR CUSTOMER E-VGA VESA VESA SNI-100Hz VESA VESA SNI-100Hz RESOLUTION 720 X 400 720 X 400 640 X 480 640 X 480 640 X 480 640 X 480 800 X 600 800 X 600 800 X 600...

  • Page 5: Table Of Contents

    TABLE OF CONTENTS Section Title Page 1. GENERAL ..............1-1 2. DISASSEMBLY 2-1. Cabinet Removal ..........2-1 2-2. D Board Removal ..........2-1 2-3. G Board Removal ..........2-2 2-4. A Board Removal ..........2-2 2-5. L Board Removal ..........2-3 2-6.

  • Page 17: Disassembly

    DISASSEMBLY 2-1. CABINET REMOVAL Four screws (+ BVTP 4 x 16) Screw cover Four screws (+ BVTT 4 x 8) Two claws Top cover Screw cover Cabinet Four screws (+ BVTT 4 x 8) Video shield 2-2. D BOARD REMOVAL Screw Two screws (+ P 3.5 x 20)

  • Page 18: G Board Removal

    2-3. G BOARD REMOVAL Two screws (+BVTP 3 x 10) Screw (+ BVTT 4 x 8) G shield Two screws (+ BVTT 4 x 8) G board Three hooks Open the G block in the direction Two printed circuit board holders of the arrow .

  • Page 19: L Board Removal

    2-5. L BOARD REMOVAL CN5001 CN5004 CN5002 CN5003 L board Four printed circuit board holders 2-6. I/O TERMINAL BOARD ASSY REMOVAL CN401 CN511 CN402 Three screws (+ BVTT 3 x 8) I/O terminal board assy...

  • Page 20: Service Position

    2-7. SERVICE POSITION CAUTION : SHORT D,G boards Rear shield If the claw is hooked, opening and closing the board is impossible. Do not try to do it by force. D board (Refer to 2-2.) A board (Refer to 2-4.) If the claw is hooked, opening and closing G board...

  • Page 21: Picture Tube Removal

    2-9. PICTURE TUBE REMOVAL Open the D block (Refer to 2-2.) Four screws (+ BVTT 4 x 8) Two connectors 6P (DY) A board 10P (DY) Anode cap Open the G block (Refer to 2-3.) Neck assy Deflection yoke Picture tube •...

  • Page 22: Safety Related Adjustment

    MCM 21T1 SECTION 3 SAFETY RELATED ADJUSTMENT When replacing or repairing the shown below table, the a) HV Regulator Circuit Check following operational checks must be performed as a 1) Confirm that the voltage of the pin 2 of CN901 on safety precaution against X-rays emissions from the unit.

  • Page 23: Adjustments

    ADJUSTMENTS Note: Hand degauss must be used on stand-by or power-off condition. This model has an automatic earth magnetism correction function by using an earth magnetism sensor and a LCC coil. When using a hand degauss while monitor (LCC coil) is being operated, it sometimes gets magnetized, and the system may not work properly as a result.

  • Page 24: Convergence Rough Adjustment

    Connect the communication cable of the computer to the connector located on the D board on the monitor. Run the service software and then follow the instruction. 1-690-391-21 A-1500-819-A 3-702-691-01 Interface Unit Connector Attachment IBM AT Computer To BUS CONNECTOR as a Jig D-sub mini Din...
  • Page 25 TO FBT FV1 FV2 HV IC401 IC402 IC403 RGB SWITCH RGB PRE-AMP RGB OUT V901 PICTURE TUBE CN402 Q101 R IN 2 R_IN2 R_OUT R_IN R_OUT R_IN R_OUT G IN 2 G_IN2 G_IN G_OUT BUFFER Q201 B IN 2 B_IN2 G_OUT G_IN G_OUT...
  • Page 26 CN520 CN504 CN512 (U-COM,DEFLECTION) (POWER SW) LLC_RB POWER LLC_RT CN891 H CONV HTR_SW LLC_LB S891 IC012 V CONV STBY 8V LLC_LT AC L IN POWER LLC_LB AC L OUT CN511 V CLK C.SYNC_1 V.SYNC_1 C.SYNC_2 PS504 V.SYNC_2 CN605 DDC_SDA_1 IC002 IC001 IC006 DDC_SCL_1...

  • Page 27: Schematic Diagrams And Printed Wiring Boards

    5-3. CIRCUIT BOARDS LOCATION Note: The components identified by shading and mark ! are critical for safety. Replace only with part . FRAME SCHEMATIC DIAGRAM number specified. • All voltages are in V. CONNECTOR PANEL • Readings are taken with a 10 M digital multimeter. R IN 1 •...
  • Page 28 — D BOARD (Conductor Side) — — D BOARD (Component Side) — µ-COM, DEFLECTION • D BOARD SEMICONDUCTOR LOCATION Q660 D–2 D513 E–1 Q661 D–2 D514 A–4 A–1 – Conductor Component Side Side Q701 D–1 D–4 – D516 D–2 Q703 C–1 C–4 –...

  • Page 29: L Boards

    • D BOARD WAVEFORMS • D BOARD VOLTAGE LIST Ref. Pin No. Voltage [V] Ref. Pin No. Voltage [V] ROTATION+ TO L BOARD TO L BOARD IC002 ROTATION- CN5002 CN5001 11.2 CN520 CN512 CN509 5.0 Vp-p (4MHz) 4.3 Vp-p (H) 2.0 Vp-p (H) 600 Vp-p (H) IC004...
  • Page 30 STBY+5V (POWER SENSOR) +15V C811 • GA BOARD Q7504 2SA1037AK CN7501 Q801 TO D BOARD VOLTAGE LIST 2SC3311A CN801 R7509 B-TO-B LED DRIVE Q802 CN501 :CHIP 2SC3311A R814 :S-MICRO L LED DRIVE Ref. Pin No. Voltage [V] • L BOARD IC5101, 5301, 5401 LA6510 R7510 LED0 C7504...
  • Page 31 (ga) V.STAT, H.STAT, LLC, POWER SUPPLY USER CONTROL POWER SENSOR GEO MAGNETIC SENSOR — G BOARD — — L BOARD (Conductor Side) — — L BOARD (Component Side) — G BOARD Terminal name of semiconductors in silk screen printed circuit ( Ref.
  • Page 32 C458 IC403 IC401 IC402 C412 +12V C101 M52755FP-TP RGB PRE-AMP M52722P RGB DRIVE 0.01 C312 FA4111 BLOCK 0.01 B:CHIP B:CHIP RGB OUT C402 STBY+5V +12V C102 R475 C305 R122 47 16V R339 R314 B:CHIP 0.01 C322 :CHIP B:CHIP :CHIP C201 B_VCC1 C306 :CHIP...
  • Page 33 VIDEO AMP • A BOARD RGB OUT SEMICONDUCTOR LOCATION — A BOARD (Conductor Side) — — A BOARD (Component Side) — Conductor Component Side Side IC401 A–1 IC402 B–3 B–1 IC403 B–3 B–1 IC404 A–2 IC406 A–1 A–3 IC408 A–1 A–3 IC409 C–1...

  • Page 34: Semiconductors

    5-4. SEMICONDUCTORS BA9756FS-E2 LA6510 NJM4558M µPC1093J 2SA1091-O M62352GP-75E µPC4558G2 2SC2362K-G M62352GP-75ED 24LC16BT/SN 24LC21AT/SN TOP VIEW TOP VIEW 20 pin SOP 8 pin SOP LA7841L µPC78L05J 2SA1175-HFE CXA2043Q 2SA1309A-QRSTA MARKING SIDE VIEW NJM78L05A 2SC2784 NJM78L09A 2SC2785-HFE TA78L05S 2SC3311A-QRSTA TA78L09S LETTER SIDE 7 pin SIP TOP VIEW LM324M...
  • Page 35 2SC4015TV2 DTZ-TT11-16B D5LC20U P6KE200AG23 DTZ10B CATHODE DTZ13B DTZ24B DTZ33B DTZ4.7C DTZ5.1B MA111 RD12SB2 RD5.6SB ANODE UDZ-TE-17-10B UDZ-TE-17-12B UDZ-TE-17-13B 2SC5047-CA EGP20G RD6.2M-B1 UDZ-TE-17-16B ERA34-10 UDZ-TE-17-24B RGP02-17EL-6433 UDZ-TE-17-33B RGP02-17PKG23 UDZ-TE-17-4.7B RGP02-20EG23 UDZ-TE-17-5.1B RGP02-20EL-6394 UDZ-TE-17-5.6B RGP15GPKG23 UDZ-TE-17-6.2B UF4005PKG23 CATHODE 2SK1120LBSONY2 RM11A ANODE 2SK2098-01MR RM11C CATHODE CATHODE...

  • Page 36: Exploded Views

    EXPLODED VIEWS • Items with no part number and no • Items marked " * " are not stocked since The components identified by shading description are not stocked because they they are seldom required for routine ¡ and mark are critical for safety.

  • Page 37: Picture Tube

    6-2. PICTURE TUBE The components identified by shading ¡ and mark are critical for safety. 7-685-663-71 +BVTP 4X16 Replace only with part number specified. ¢ 7-685-881-09 +BVTT 4X8 7-685-883-01 +BVTT 4X12 REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO. DESCRIPTION REMARK ¡...

  • Page 38: Electrical Parts List

    MCM 21T1 MCM 21T1 The components identified by shading SECTION 7 ¡ and mark are critical for safety. Replace only with part number specified. ELECTRICAL PARTS LIST REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO. DESCRIPTION REMARK NOTE: • All variable and adjustable resistors have •...
  • Page 39 MCM 21T1 The components identified by shading ¡ and mark are critical for safety. Replace only with part number specified. REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO. DESCRIPTION REMARK C435 1-163-021-91 CERAMIC CHIP 0.01MF 10% 50V D102 8-719-062-51 DIODE 1PS226-115...
  • Page 40 MCM 21T1 The components identified by shading ¡ and mark are critical for safety. Replace only with part number specified. REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO. DESCRIPTION REMARK L301 1-412-478-11 INDUCTOR 0.15UH R126 1-216-097-91 RES,CHIP 100K 1/10W L401...
  • Page 41 MCM 21T1 The components identified by shading ¡ and mark are critical for safety. Replace only with part number specified. REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO. DESCRIPTION REMARK R241 1-216-025-91 RES,CHIP 1/10W R417 1-216-089-91 RES,CHIP 1/10W R243 1-216-043-91 RES,CHIP...
  • Page 42 MCM 21T1 The components identified by shading ¡ and mark are critical for safety. (a)(ga)(g) Replace only with part number specified. REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO. DESCRIPTION REMARK SG301 1-517-499-21 GAP, SPARK R7512 1-216-089-91 RES,CHIP 1/10W SG401 1-519-526-11 LAMP, NEON...
  • Page 43 MCM 21T1 The components identified by shading ¡ and mark are critical for safety. Replace only with part number specified. REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO. DESCRIPTION REMARK C692 1-111-016-11 ELECT 0.0012F 20% 10V <IC> C693 1-130-495-00 FILM 0.1MF...
  • Page 44 MCM 21T1 The components identified by shading ¡ and mark are critical for safety. (g)(d) Replace only with part number specified. REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO. DESCRIPTION REMARK R620 1-215-485-00 METAL 470K 1/4W R695 1-249-443-11 CARBON 0.47...
  • Page 45 MCM 21T1 The components identified by shading ¡ and mark are critical for safety. Replace only with part number specified. REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO. DESCRIPTION REMARK C009 1-164-004-11 CERAMIC CHIP 0.1MF 10% 25V C069 1-163-021-91 CERAMIC CHIP 0.01MF...
  • Page 46 MCM 21T1 The components identified by shading ¡ and mark are critical for safety. Replace only with part number specified. REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO. DESCRIPTION REMARK C531 1-163-021-91 CERAMIC CHIP 0.01MF 10% 50V C908 1-136-169-00 FILM 0.22MF...
  • Page 47 MCM 21T1 The components identified by shading ¡ and mark are critical for safety. Replace only with part number specified. REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO. DESCRIPTION REMARK D010 8-719-976-99 ZENER DIODE DTZ5.1B D907 8-719-158-49 ZENER DIODE RD12SB2...
  • Page 48 MCM 21T1 The components identified by shading ¡ and mark are critical for safety. Replace only with part number specified. REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO. DESCRIPTION REMARK <COIL> Q528 8-729-043-41 TRANSISTOR 2SK2098-01MR-F119 Q660 8-729-033-26 TRANSISTOR DTA114GKAT146 L001...
  • Page 49 MCM 21T1 The components identified by shading ¡ and mark are critical for safety. Replace only with part number specified. REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO. DESCRIPTION REMARK R043 1-216-065-91 RES,CHIP 4.7K 1/10W R506 1-249-397-11 CARBON 1/4W F...
  • Page 50 MCM 21T1 The components identified by shading ¡ and mark are critical for safety. Replace only with part number specified. REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO. DESCRIPTION REMARK R564 1-216-697-91 METAL CHIP 0.50%1/10W R730 1-219-746-11 CARBON 1/2W R565 1-216-671-11 METAL CHIP 6.8K...
  • Page 51 MCM 21T1 The components identified by shading ¡ and mark are critical for safety. (d)(h) Replace only with part number specified. REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO. DESCRIPTION REMARK ¡ T902 X-4035-170-1 TRANSFORMER ASSY, FLYBACK R930 1-216-033-00 RES,CHIP...
  • Page 52 MCM 21T1 The components identified by shading ¡ and mark are critical for safety. (h)(j)(l) Replace only with part number specified. REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO. DESCRIPTION REMARK <SWITCH> C5205 1-164-489-11 CERAMIC CHIP 0.22MF 10% 16V C5206 1-164-004-11 CERAMIC CHIP 0.1MF...
  • Page 53 MCM 21T1 The components identified by shading ¡ and mark are critical for safety. Replace only with part number specified. REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO. DESCRIPTION REMARK R5003 1-216-295-91 SHORT R5310 1-216-073-00 RES,CHIP 1/10W R5005 1-216-689-11 RES,CHIP...

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