Siemens MCM-21T2 Service Manual

Siemens MCM-21T2 Service Manual

Color monitor

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SERVICE MANUAL
CRT
Viewable image size
Recommended resolution Horizontal: 1600 dots
Standard image area
Deflection frequency*
AC input voltage/current 100 to 240 V, 50 – 60 Hz, 2.0 – 1.0 A
SPECIFICATIONS
0.24 mm aperture grille pitch
21 inches measured diagonally
90-degree deflection
FD Trinitron
Approx. 403.8 × 302.2 mm (w/h)
(16 × 12 inches)
19.8" viewing image
Vertical: 1200 lines
Approx. 388 × 291 mm (w/h)
× 11
3
1
(15
/
/
inches)
8
2
or
Approx. 364 × 291 mm (w/h)
× 11
3
1
(14
/
/
inches)
8
2
Horizontal: 30 to 121 kHz
Vertical: 48 to 160 Hz
MCM-21T2
Power consumption
Approx. 145 W
Approx. 498 × 491 × 478 mm (w/h/d)
Dimensions
(19
Mass
Approx. 32 kg (70 lb 9 oz)
Plug and Play
DDC1/2B/2Bi, GTF**
* Recommended horizontal and vertical timing condition
• Horizontal sync width duty should be more than 4.8% of total
horizontal time or 0.8 µs, whichever is larger.
• Horizontal blanking width should be more than 2.3 µsec.
• Vertical blanking width should be more than 450 µsec.
** If the input signal is Generalized Timing Formula (GTF)
compliant, the GTF feature of the monitor will automatically
provide an optimal image for the screen.
Design and specifications are subject to change without notice.
COLOR MONITOR
AEP Model
Chassis No. SCC-L22M-A
G1
CHASSIS
× 19
× 18
5
3
7
/
/
/
inches)
8
8
8

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Summary of Contents for Siemens MCM-21T2

  • Page 1 MCM-21T2 SERVICE MANUAL AEP Model Chassis No. SCC-L22M-A CHASSIS SPECIFICATIONS Power consumption Approx. 145 W 0.24 mm aperture grille pitch Approx. 498 × 491 × 478 mm (w/h/d) Dimensions 21 inches measured diagonally × 19 × 18 inches) 90-degree deflection Mass Approx.
  • Page 2 MCM-21T2 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 MCM-21T2 POWER SAVING FUNCTION DIAGNOSIS...
  • Page 4 TIMING SPECIFICATION MODE AT PRODUCTION MODE 1 MODE 2 MODE 3 MODE 4 MODE 5 MODE 6 MODE 7 RESOLUTION 720 X 400 640 X 480 800 X 600 800 X 600 1024 X 768 1024 X 768 1152 X 864 CLOCK 28.325 MHz 25.175 MHz...
  • 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, I/O Terminal Board Assembly Removal ............. 2-2 2-5. N Board Removal ..........
  • Page 6 The operating instructions mentioned here are partial abstracts from the Operating Instruction Manual. The page numbers of the Operating Instruction Manual remain as in the manual.
  • Page 15: Disassembly

    MCM-21T2 SECTION 2 DISASSEMBLY 2-1. CABINET REMOVAL Push in the tip of a screwdriver about 5mm to unlock the claw. Cabinet Cabinet Two claws Four screws Bezel assembly Bezel assembly (+ BVTT 4 x 8) Cabinet Top cover Two screws...
  • Page 16: G Board Removal

    MCM-21T2 2-3. G BOARD REMOVAL Four screws (+BVTP 3 x 8) G shield Three screws (+ BVTT 4 x 8) CN602 G board CN654 CN653 CN652 CN650 Two screws (+ BVTP 3 x 8) AC inlet (3P) Two hooks Open the G block in the direction of the arrow .
  • Page 17: N Board Removal

    MCM-21T2 2-5. N BOARD REMOVAL CN5003 CN5002 CN001 CN5001 CN002 CN007 CN010 CN011 N board Printed circuit board holder 2-6. SERVICE POSITION CAUTION : SHORT D,G boards Rear shield If the claw is hooked, opening and closing the board is impossible.
  • Page 18: Bezel Assembly, H Board Removal

    MCM-21T2 2-7. BEZEL ASSEMBLY, H BOARD REMOVAL Before removing the bezel assembly, secure the picture tube by attaching two screws to the picture tube shield at the positions shown with an arrow (diagonal two places) to prevent the picture tube from falling. (Use the screws +BVTT 4 x 8 that fix top cover.)
  • Page 19: Picture Tube Removal

    MCM-21T2 2-9. PICTURE TUBE REMOVAL Remove the bezel assembly. (Refer to 2-7) Open the D block (Refer to 2-2.) A board Deflection yoke Anode cap Open the G block (Refer to 2-3.) Neck assembly Three connectors Picture tube • REMOVAL OF ANODE-CAP NOTE: Short circuit the anode of the picture tube and the anode cap to the metal chassis, CRT shield or carbon painted on the CRT, after removing the anode.
  • Page 20: Harness Location

    2-10. HARNESS LOCATION J board H board Picture tube CN801 4pin 4pin CN651 CN601 CN650 CN603 CN5001 CN508 CN505 CN509 CN652 CN5003 CN502 CN002 CN5002 CN653 CN602 CN654 CN001 CN506 CN501 AC inlet G board D board N board Rear shield I/O terminal board assembly HD15 CN402...
  • Page 21: Safety Related Adjustment

    MCM-21T2 SECTION 3 SAFETY RELATED ADJUSTMENT When replacing or repairing the shown below table, the c) Beam Current Protector Circuit Check following operational checks must be performed as a (1st Protector): D Board safety precaution against X-rays emissions from the unit.
  • Page 22: Adjustments

    MCM-21T2 SECTION 4 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 23 MCM-21T2 Connect the communication cable of the computer to the connector located on the D board. 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...
  • Page 24: Diagrams

    SECTION 5 DIAGRAMS 5-1. BLOCK DIAGRAMS CN402 BIN2 GIN2 RIN2 IC401 IC402 IC403 INPUT SELECT RGB DRIVE RGB AMP CN407 CN408 CN401 V901 BIN2 ROUT ROUT ROUT HD15 PICTURE TUBE GIN2 RIN2 GOUT GOUT GOUT HEATER+ HEATER+ BOUT BOUT BOUT BIN1 INPUT1 CONNECTOR PANEL...
  • Page 25 µ-COM, V.CONV, H. CONV, LCC, GEO MAGNETIC SENSOR DET2 IC5301 (2/2) DET1 CN5002 CN002 DDC+5V 2 LCC-LB (+) – STBY+5V LCC-LB IC001 DDC SCL 2 UBI3 LCC-LB (–) CPU/DSP LCC-LT (+) DDC SDA 2 UBI4 IC5301 (1/2) LCC-LT LCC-LT (–) HS/CS 2 UIN3 TO CONNECTOR...
  • Page 26 (POWER SUPPLY) CN654 IC650 H CENT H +220V SHUNT REG S891 H CENT N POWER T620 TH601 CN891 CN603 H CENT L D650 AC L OUT AC L OUT +220V TO D BOARD AC L IN AC L IN +220V CN508 D610 (POWER SW)
  • Page 27: Frame Schematic Diagram

    5-2. FRAME SCHEMATIC DIAGRAM CN401 INPUT1 HD15D-SUB VIDEO AMP, CN407 CN408 RGB OUT CN402 CONNECTOR PANEL :S-MICRO B GND 2 B IN 2 PICTURE G GND 2 TUBE G IN 2 HEATER+ HEATER+ R GND 2 R IN 2 C BLOCK (CRT SOCKET) HD15D-SUB INPUT2...
  • Page 28: Circuit Boards Location

    5-4. SCHEMATIC DIAGRAMS AND PRINTED 5-3. CIRCUIT BOARDS LOCATION Terminal name of semiconductors in silk screen Part Replaced ([) WIRING BOARDS printed circuit ( HV ADJ RV901 Note: Circuit Device Printed symbol Terminal name • All capacitors are in µF unless otherwise noted. (pF: µµF) Collector Capacitors without voltage indication are all 50 V.
  • Page 29 IC403 FA4301 5V-2 +12V IC401 IC402 RGB AMP C BLOCK M52757FP-TP M52749FP-TP R338 D101 INPUT SELECT RGB DRIVE R116 1PS226-115 :CHIP C107 4.7k C101 C411 :CHIP R112 CN402 0.01 R_IN2 VCC2 OSD_BLK VCC2 B:CHIP R105 R337 (GND) (GND) C110 :CHIP B:CHIP 0.001 :CHIP...
  • Page 30 • A BOARD IC401 M52757FP CONNECTOR PANEL TO A BOARD V901 CN402 PICTURE TUBE 21TKC Sync Sepa TO D BOARD T902(FBT)HV HD15D-SUB INPUT2 B-SS9116<NH.>-A..-P2 TO N BOARD CN002 • A BOARD IC402 M52749FP • A BOARD WAVEFORMS OSD IN (R) MAIN RETRACE INPUT (R)
  • Page 31 — A BOARD (Conductor Side) — • A BOARD — A BOARD (Component Side) — SEMICONDUCTOR LOCATION Conductor Component Side Side IC401 IC402 IC403 IC404 IC405 IC406 IC407 TRANSISTOR Conductor Component Side Side Q101 Q201 Q301 Q401 Q402 Q406 Q407 Q410 –...
  • Page 32 Q803 DTA124ESA-TP 1W+5V LED DRIVE CN891 R813 S891 C810 POWER Q804 AC L OUT DTA124ESA-TP R823 LED DRIVE Q801 R824 2SC3311A STBY+5V 1.5k CN801 AC L IN LED DRIVE TO G BOARD WHT-L R811 :S-MICRO CN603 R812 LED0 LED1 Q802 KEY_DET (POWER SW) 2SC3311A...
  • Page 33 TO A BOARD CN406 TO G BOARD CN654 CN506 CN508 :S-MICRO D922 ERA34-10TP1 R901 D901 100k 1SS133T-77 R549 :CHIP C552 400V 0.47 R560 IC502 R574 CN501 R553 C909 C910 R903 D908 R917 1/2W LA6500-FA 100k 0.01 C932 :FPRD B:CHIP ERA34-10TP1 :RN-CP :CHIP 0.01...
  • Page 34 • D BOARD WAVEFORMS — D BOARD — 8.8 Vp-p (H) 1.9 Vp-p (H) 568 Vp-p (H) 50.6 Vp-p (H) 54.5 Vp-p (H) 2.1 Vp-p (H) • D BOARD SEMICONDUCTOR LOCATION DIODE IC501 IC502 D504 IC503 D505 – IC701 D506 –...
  • Page 35: Schematic Diagram Of A Board

    CN011 TO H BOARD CN801 TO D BOARD CN505 TO D BOARD CN504 TO A BOARD CN403 25P FFC CN007 CN010 CN001 :FFC :S-MICRO R1061 1W+5V :CHIP SUB+5V 1W+5V 1CLR 1CLR 2CLR 2CLR VSHPLVL S/HC VSHPLVL DVSHAPE VCC4.5 DVSHAPE VSAWRST VSAWRST VSHP_C VCLK...
  • Page 36 (µ-COM,GEO MAGNETIC SENSOR) STBY+5V IC006 TL082CPS-E20 ABL DET AMP GND10 AIN4 UPWM5 AVSS2 GND11 AIN3 MOIRECONT UPWM6 AIN2 KEYDET VDD9 AIN1 HSHPBAL TEMP UPWM7 AIN0 VDD10 AVDD1 UPWM8 DAC1 GND12 AVSS1 HDF0 GND13 DAC0 Q010 VCONV UPWM9 GND4 2SA1037AK INPUTSEL INV.
  • Page 37 STBY+5V -15V +15V IC5401 IC5101 IC5301 IC5201 +15V LA6515 LA6515 LA6515 LA6515 V.S1 V.S1 V.S1 V.S1 OUT1 V.S2 OUT1 V.S2 OUT1 V.S2 OUT1 V.S2 OUT2 OUT2 OUT2 OUT2 -15V (H.V.CONV,LCC) B-SS9116<NH.>-N..-P3-EPS05 CN5001 CN5003 CN5002 :S-MICRO :S-MICRO :S-MICRO...
  • Page 38 — N BOARD (Conductor Side) — • N BOARD — N BOARD (Component Side) — SEMICONDUCTOR LOCATION Conductor Component Side Side IC001 IC002 IC003 IC004 IC005 IC006 IC010 IC011 IC012 IC5101 IC5201 IC5301 IC5401 TRANSISTOR Conductor Component Side Side Q001 Q002 Q003 Q004...
  • Page 39 IC650 CN604 DM-57N (POWER SUPPLY) +220V SHUNT REG 5.7 2.5 CN654 R653 R652 :S-MICRO R649 470k :CHIP :FPRD H CENT H C662 C661 R650 H CENT N 0.01 2200p 2.2k :CHIP T620 H CENT L D650 L650 +220V TO D BOARD 22µH D4SBL40 +220V...
  • Page 40 — G BOARD — • G BOARD SEMICONDUCTOR LOCATION IC610 IC630 IC650 IC651 IC652 IC653 IC654 IC680 TRANSISTOR Q603 – Q610 – Q621 – Q630 – Q631 – Q632 – Q633 Q650 – Q651 – Q652 Q653 Q654 Q667 Q670 Q671 Q691 –...
  • Page 41: Semiconductors

    5-5. SEMICONDUCTORS 2SC2362K-G M52749FP-TP DTA124ESA 2SJ360-TE12L ERA22-06AVRBT ON3171-R 1PS181-115 BA00AST-V5 BA9759F-E2 HA17431PA DTA124ESA-TP 2SC2362KG-AA ERA22-08 BA05ST-V5 HA17431PA-TZ 2SA1175-HFE ERA34-10TP1 LA6500-FA 2SA1309A-QRSTA ERB38-06V1 2SC2459-GR-TPE4 GP08D 2SC2784 GP08DPKG23 2SC2785-HFE HSS83TD 2SC3311A-QRSTA P6KE200AG23 TOP VIEW TOP VIEW RD2.2M-T1B LETTER SIDE RGP02-20EL-6394 42pin SOP 18pin SOP CATHODE M52757FP-TP...
  • Page 42: Exploded Views

    MCM-21T2 SECTION 6 EXPLODED VIEWS • Items with no part number and no • Items marked " * " are not stocked since The components identified 0 marked are description are not stocked because they they are seldom required for routine critical for safety.
  • Page 43: Picture Tube

    MCM-21T2 6-2. PICTURE TUBE 7-685-663-71 +BVTP 4X16 7-685-881-09 +BVTT 4X8 The components identified 0 marked are critical for safety. Replace only with the part number specified. REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO. DESCRIPTION REMARK X-4200-565-1 BEZEL ASSY 52-56...
  • Page 44: Electrical Parts List

    MCM-21T2 ¡ The components identified marked are SECTION 7 critical for safety. Replace only with the part number specified. ELECTRICAL PARTS LIST The components identified by [ in this REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO. DESCRIPTION REMARK NOTE: •...
  • Page 45 MCM-21T2 ¡ The components identified marked are critical for safety. Replace only with the part number specified. REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO. DESCRIPTION REMARK FB411 1-412-911-11 FERRITE 1.1µH C446 1-104-664-11 ELECT 47µF 20% 25V C449 1-109-982-11 CERAMIC CHIP 1µF...
  • Page 46 MCM-21T2 ¡ The components identified marked are critical for safety. Replace only with the part number specified. REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO. DESCRIPTION REMARK R137 1-249-413-11 CARBON 1/4W R406 1-216-097-91 RES-CHIP 100K 1/10W R138 1-216-017-91 RES-CHIP 1/10W...
  • Page 47 MCM-21T2 ¡ The components identified marked are critical for safety. (a)(g) Replace only with the part number specified. REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO. DESCRIPTION REMARK SG401 1-576-354-21 GAP, SPARK C657 1-104-664-11 ELECT 47µF 20% 25V SG402 1-519-422-11 GAP, SPARK...
  • Page 48 MCM-21T2 ¡ The components identified marked are critical for safety. Replace only with the part number specified. REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO. DESCRIPTION REMARK D681 8-719-109-89 ZENER DIODE RD5.6ESB2 Q652 8-729-120-28 TRANSISTOR 2SC1623-L5L6 D682 8-719-121-26 ZENER DIODE RD9.1ESL2...
  • Page 49 MCM-21T2 ¡ The components identified marked are critical for safety. (g)(d) Replace only with the part number specified. REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO. DESCRIPTION REMARK R659 1-216-049-91 RES-CHIP 1/10W <VARISTOR> R660 1-216-073-00 RES-CHIP 1/10W VDR601 ¡ 1-801-268-51 VARISTOR TNR14V471K660...
  • Page 50 MCM-21T2 ¡ The components identified marked are critical for safety. Replace only with the part number specified. REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO. DESCRIPTION REMARK C535 1-163-021-91 CERAMIC CHIP 0.01µF 10% 50V C905 1-163-127-00 CERAMIC CHIP 270pF C536 1-126-967-11 ELECT 47µF...
  • Page 51 MCM-21T2 ¡ The components identified marked are critical for safety. Replace only with the part number specified. REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO. DESCRIPTION REMARK D519 8-719-988-61 DIODE 1SS355TE-17 JR006 1-216-295-91 SHORT D520 8-719-988-61 DIODE 1SS355TE-17 JR008 1-216-295-91 SHORT...
  • Page 52 MCM-21T2 ¡ The components identified marked are critical for safety. Replace only with the part number specified. REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO. DESCRIPTION REMARK Q903 8-729-901-87 TRANSISTOR 2SC2411K-CQ R547 1-219-726-11 METAL Q904 8-729-901-97 TRANSISTOR 2SA1036K-Q R548 1-249-437-11 CARBON...
  • Page 53 The components identified by in this MCM-21T2 ¡ The components identified marked are manual have been carefully factory- critical for safety. selected for eachset in order to satisfy regulations regarding X-ray radiation. Replace only with the part number specified. Should replacement be required, replace only with the value originally used.
  • Page 54 MCM-21T2 ¡ The components identified marked are critical for safety. (h)(j)(n) Replace only with the part number specified. REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO. DESCRIPTION REMARK * A-1372-740-AH BOARD, COMPLETE <THERMISTOR> **************************** TH801 1-807-796-11 THERMISTOR <CAPACITOR> C810 1-126-791-11 ELECT 10µF...
  • Page 55 MCM-21T2 ¡ The components identified marked are critical for safety. Replace only with the part number specified. REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO. DESCRIPTION REMARK C033 1-163-021-91 CERAMIC CHIP 0.01µF 10% 50V C097 1-126-964-11 ELECT 10µF 20% 50V C098 1-163-021-91 CERAMIC CHIP 0.01µF...
  • Page 56 MCM-21T2 ¡ The components identified marked are critical for safety. Replace only with the part number specified. REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO. DESCRIPTION REMARK D002 8-719-062-51 DIODE 1PS226-115 D003 8-719-062-51 DIODE 1PS226-115 IC006 8-759-700-78 IC NJM082M D004...
  • Page 57 MCM-21T2 ¡ The components identified marked are critical for safety. Replace only with the part number specified. REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO. DESCRIPTION REMARK R030 1-216-049-91 RES-CHIP 1/10W R1003 1-216-049-91 RES-CHIP 1/10W R031 1-216-669-11 METAL CHIP 5.6K 0.5% 1/10W...
  • Page 58 MCM-21T2 ¡ The components identified marked are critical for safety. Replace only with the part number specified. REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO. DESCRIPTION REMARK R1062 1-216-049-91 RES-CHIP 1/10W R5510 1-249-382-11 CARBON 1/4W F R1063 1-216-065-91 RES-CHIP 4.7K...

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