MCM 21T1 SERVICE MANUAL AEP Model Chassis No.
MCM 21T1 SAFETY CHECK-OUT After correcting the original service problem, perform the following safety checks before releasing the set to the customer: 1. Check the area of your repair for unsoldered or poorly-soldered connections. Check the entire board surface for solder splashes and bridges. 2. Check the interboard wiring to ensure that no wires are “pinched” or contact high-wattage resistors. 3. Check that all control knobs, shields, covers, ground straps, and mounting hardware have been replaced.
MCM 21T1 POWER SAVING FUNCTION This monitor meets the power-saving guidelines set by VESA and Energy Star, as well as the more stringent NUTEK . If the monitor is connected to a computer or video graphics board that is VESA DPMS (Display Power Management Signaling) compliant, the monitor will automatically reduce power consumption in three stages as shown below. You can set the delay time before the monitor enters the power saving mode using the OSD.
MCM 21T1 TIMING SPECIFICATION MODE AT PRODUCTION MODE FOR CUSTOMER MODE 1 MODE 2 MODE 3 VGA E-VGA VGA VESA VESA SNI-100Hz VESA VESA SNI-100Hz MGA 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 600 800 X 600 28.325 MHz 36.082 MHz 25.175 MHz 31.500 MHz 36.000 MHz 40.500 MHz 49.500 MHz 56.250 MHz 67.500 MHz 81.000 MHz 31.472 kHz 37.822 kHz 31.469 kHz 37.5 kHz 43.269 kHz 50.625 kHz 46.875 kHz 53.674 kHz 63.92 kHz 76.
MCM 21T1 TABLE OF CONTENTS Section Title Page 1. GENERAL ................................................................. 1-1 2. DISASSEMBLY 2-1. 2-2. 2-3. 2-4. 2-5. 2-6. 2-7. 2-8. 2-9. Cabinet Removal ............................................... D Board Removal .............................................. G Board Removal .............................................. A Board Removal .............................................. L Board Removal ..............................................
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.
1-2
1-3
1-4
1-5
1-6
1-7
1-8
1-9
1-10
1-11
MCM 21T1 SECTION 2 DISASSEMBLY 2-1. CABINET REMOVAL 3 5 6 1 Four screws (+ BVTT 4 x 8) Four screws (+ BVTP 4 x 16) Screw cover Two claws Top cover 2 4 7 8 Screw cover Cabinet Four screws (+ BVTT 4 x 8) Video shield 2-2. D BOARD REMOVAL 4 Screw (+ P 3.5 x 20) 5 Two screws (+ BVTP 3 x 10) 1 6 D board Screw (+ BVTT 4 x 8) 2 Two screws (+ BVTT 4 x 8) B Three hooks 3 2-1 A Open the D block in the direction of the arrow A . and remove of the arrow B .
MCM 21T1 2-3. G BOARD REMOVAL 4 1 Two screws (+BVTP 3 x 10) Screw (+ BVTT 4 x 8) 5 G shield 7 G board Two screws (+ BVTT 4 x 8) 2 B A Three hooks 3 Open the G block in the direction of the arrow A . and remove of the arrow B . 6 Two printed circuit board holders 2-4.
MCM 21T1 2-5. L BOARD REMOVAL CN5001 CN5004 CN5002 CN5003 2 1 Four printed circuit board holders 2-6.
MCM 21T1 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 (Refer to 2-3.) the board is impossible. Do not try to do it by force. 2-8.
MCM 21T1 2-9. PICTURE TUBE REMOVAL 1 4 Open the D block (Refer to 2-2.) 6 Four screws (+ BVTT 4 x 8) Two connectors 6P (DY) 3 A board 10P (DY) 5 Anode cap 2 8 9 7 Neck assy Open the G block (Refer to 2-3.) Deflection yoke 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.
MCM 21T1 SECTION 3 SAFETY RELATED ADJUSTMENT When replacing or repairing the shown below table, the following operational checks must be performed as a safety precaution against X-rays emissions from the unit. a) HV Regulator Circuit Check 1) Confirm that the voltage of the pin 2 of CN901 on D board is within the voltage range shown below. Standard: 9.00 ± 0.
MCM 21T1 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. • Landing Rough Adjustment 1. Enter the full white signal. (or the full black dots signal). 2. Adjust the contrast to the maximum. 3.
MCM 21T1 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 1-690-391-21 2 A-1500-819-A Interface Unit 3 3-702-691-01 Connector Attachment IBM AT Computer as a Jig To BUS CONNECTOR D-sub (9 Pin [female]) mini Din (8Pin) *The parts above ( 1 4 Pin • Convergence Specification Phospher edge C A 60 kHz V fH< 60 kHz H Zone N. Hemisphere S. Hemisphere A Zone 0.24 mm 0.
SECTION 5 DIAGRAMS 5-1. BLOCK DIAGRAMS TO FBT FV1 FV2 HV IC402 RGB PRE-AMP IC401 RGB SWITCH CN402 R IN 2 1 G IN 2 3 B IN 2 6 7 5 2 17 27 R_IN2 G_IN2 B_IN2 R_OUT R_IN G_OUT 16 13 11 R_IN1 G_IN1 B_IN1 HFBP OSD_SEL MOSI CLK VRET 19 SW VD HD B G R 5BNC I CN403 INPUT SW GREEN CLP C.BLK VIDEO LOWB DET G.SYNC Q401-Q403 6 4 1 3 8 2 Q101 42 Q201 G_OUT B_IN B_OUT 51 Q301 25 G.
D(U-COM,DEFLECTION) 4 5 2 3 IC012 ROM G CN520 VX VY H CONV V CONV 1 2 3 4 K CN504 DGC POWER HTR_SW STBY 8V 5 6 7 8 9 D CN512 LLC_RB LLC_RT LLC_LB LLC_LT LLC_LB J(POWER SW) CN891 L AC L IN AC L OUT S891 POWER 3 1 5 SDA 7 CS1 VS1 CS2 VS2 6 AC L IN AC L OUT 1 2 3 4 6 8 9 11 7 10 V CLK SCL PS504 IC002 ROM IC001 CPU IC006 5V REG I O STBY5V 40 7 V CLK VX 46 VY 74 H CONV 6 SCL 47 P70/IRQ0 30 DDC_SDA_1 31 4 V CONV 5 32 DDC_SDA_2 33 Q660 DDC_SCL_2 HV_PROT 96 LLC_LT LLC_RT LL
5-3. CIRCUIT BOARDS LOCATION L D Note: The components identified by shading and mark ! are critical for safety. Replace only with part number specified. A 5-2. FRAME SCHEMATIC DIAGRAM • • • • CONNECTOR PANEL 1 2 3 4 5 6 5 15 2 3 4 9 10 8 14 7 13 R IN 1 R GND 1 G IN 1 G GND 1 B IN 1 B GND 1 1 2 3 4 5 6 7 R IN 2 R GND 2 G IN 2 G GND 2 NC B IN 2 B GND 2 1 2 3 4 5 6 7 8 CLP BKGP C.
— D BOARD (Conductor Side) — 1 2 3 D 4 µ-COM, DEFLECTION — D BOARD (Component Side) — 1 2 3 • D BOARD SEMICONDUCTOR LOCATION IC Component ( Conductor Side ) ( Side ) IC001 IC002 IC003 IC004 IC005 IC006 IC007 IC008 IC009 IC010 IC011 IC013 IC502 IC505 IC701 IC702 IC703 IC901 A B D–2 E–2 D–3 E–1 D–1 E–1 A–4 D–1 E–4 E–3 A–2 E–2 E–3 D–3 E–4 D–3 D–3 D–2 E–4 E–4 E–3 A–1 D–3 D–4 E–1 Component ( Conductor Side ) ( Side ) C D D–4 D–4 E–1 D–3 D–4 A–3 B–3 A–3 D–4 D–4 D–4 A–4 C–4 D–3 C–3 A–3 D–4 D–
(1) Schematic Diagram of D Board 1 2 3 4 5 7 6 8 9 10 11 12 14 13 15 16 17 18 19 20 21 22 • D BOARD VOLTAGE LIST • D BOARD WAVEFORMS +15V GND -15V GND LCC_RB LCC_RT LCC_LB LCC_LT LCC_NS 1 2 3 4 5 6 7 8 9 VX VY D513 MA111 C025 1 R043 4.7k :CHIP C037 220 16V DFOUT 22 PWMOUT VCC2 PWMREF PWMFIL PWMNF R013 10k :RN-CP R042 47k :CHIP C031 R037 0.01 3.3k B:CHIP :CHIP 21 SOFTSTR HSAW 16 GND3 R038 4.7k :CHIP C082 10 C021 0.
(2) Schematic Diagrams of G, GA, H, J and L Boards 1 2 3 4 5 7 6 8 9 10 11 12 14 13 15 16 17 18 19 20 21 22 23 24 26 25 27 29 28 30 A A STBY+5V (POWER SENSOR) +15V B CN7501 10P B-TO-B R7509 10k :CHIP R7513 68k :CHIP R7502 10k :CHIP L SENCE GND 2 I SENSE DRIVE 1 5 AC SENSE V SENCE IC7501 MC33262P SENSOR 6 CMPNS C 7 VCC 8 3 D7501 RD22ESB2 R7507 47k :CHIP R7506 10k :CHIP C7502 0.22 :MPS R7505 8.2k :RN-CP Q7502 2SC2412K SW C7505 0.
G POWER SUPPLY H USER CONTROL (ga) L POWER SENSOR — G BOARD — — L BOARD (Conductor Side) — V.STAT, H.STAT, LLC, GEO MAGNETIC SENSOR — L BOARD (Component Side) — G BOARD Terminal name of semiconductors in silk screen printed circuit (*) Ref. * Q615, Q680, Q691 1 D614, D617, D640, D666, D680, D681, D693 3 *: Refer to Terminal name of semiconductors in silk screen printed circuit (see page 5-9) — GA BOARD — GA BOARD Terminal name of semiconductors in silk screen printed circuit (*) Ref.
(3) Schematic Diagram of A Board GND R_IN1 H_IN1 V_IN1 VS.OUT GND SW R128 1M :CHIP C121 0.01 B:CHIP R139 10k :CHIP C130 0.01 B:CHIP C403 47 25V R473 10k :CHIP C410 0.01 B:CHIP NC NC OSDB_DRV B_GND1 B_GND2 G_VCC1 G_OUT G_IN G_VCC2 G_DRV G_HOLD G_OSD OSDG_DRV G_GND1 G_GND2 R_VCC1 R_OUT R_IN R_VCC2 R_DRV R_HOLD NC NC NC NC NC NC NC OSDR_DRV R_OSD NC R_GND1 R_GND2 MAIN CONT BLK CLP BRT CN403 8P WHT-L :S-MICRO 1 2 3 4 5 6 7 8 R426 C431 100 0.
A VIDEO AMP RGB OUT — A BOARD (Conductor Side) — • A BOARD SEMICONDUCTOR LOCATION — A BOARD (Component Side) — IC 1 2 3 1 Component ( Conductor Side ) ( Side ) IC401 IC402 IC403 IC404 IC406 IC408 IC409 IC410 B–3 B–3 A–1 A–1 2 A–1 B–1 B–1 A–2 A–3 A–3 C–1 A–2 A A TRANSISTOR Component ( Conductor Side ) ( Side ) Q101 Q105 Q106 Q201 Q202 Q205 Q206 Q301 Q305 Q306 Q401 Q402 Q403 Q404 Q405 Q406 Q408 Q409 Q410 B B–3 D–3 D–3 B–3 A–3 C–3 C–3 B–3 C–3 C–3 A–2 * D–1 D–1 C–1 C–1 C–1 C–1 A–1 A–2 B–2
5-4.
2SC4015TV2 2SC5047-CA DTZ-TT11-16B DTZ10B DTZ13B DTZ24B DTZ33B DTZ4.7C DTZ5.1B MA111 RD12SB2 RD5.6SB UDZ-TE-17-10B UDZ-TE-17-12B UDZ-TE-17-13B UDZ-TE-17-16B UDZ-TE-17-24B UDZ-TE-17-33B UDZ-TE-17-4.7B UDZ-TE-17-5.1B UDZ-TE-17-5.6B UDZ-TE-17-6.2B D5LC20U P6KE200AG23 CATHODE ANODE EGP20G ERA34-10 RGP02-17EL-6433 RGP02-17PKG23 RGP02-20EG23 RGP02-20EL-6394 RGP15GPKG23 UF4005PKG23 RD6.
MCM 21T1 SECTION 6 EXPLODED VIEWS • Items with no part number and no description are not stocked because they are seldom required for routine service. • The construction parts of an assembled part are indicated with a collation number in the remark column. • Items marked " * " are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items. The components identified by shading and mark ¡ are critical for safety.
MCM 21T1 6-2. PICTURE TUBE p ¢ π 7-685-663-71 7-685-881-09 7-685-883-01 The components identified by shading and mark ¡ are critical for safety. Replace only with part number specified. +BVTP 4X16 +BVTT 4X8 +BVTT 4X12 60 62 61 73 74 57 59 75 63 72 64 54 58 65 67 57 52 55 56 66 68 53 69 51 71 REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO.
MCM 21T1 6-3. PACKING MATERIALS The components identified by shading and mark ¡ are critical for safety. Replace only with part number specified. 107 104 105 101 106 102 103 REF.NO. PART NO. 101 102 103 104 105 * 4-061-809-01 * 4-066-565-01 * 4-061-810-01 * 3-864-571-11 ¡ 1-765-719-21 DESCRIPTION REMARK REF.NO. PART NO.
MCM 21T1 MEMO 6-4
The components identified by shading and mark ¡ are critical for safety. Replace only with part number specified. REF.NO. PART NO. NOTE: (a) ELECTRICAL PARTS LIST DESCRIPTION The components identified by shading and mark ¡ are critical for safety. Replace only with part number specified. When indicating parts by reference number, please include the board name. REF.NO. PART NO. MCM 21T1 SECTION 7 REMARK REF.NO. PARThave NO.
MCM 21T1 The components identified by shading and mark ¡ are critical for safety. Replace only with part number specified. (a) REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO. DESCRIPTION REMARK C435 C436 C438 C440 1-163-021-91 1-163-243-11 1-163-243-11 1-163-243-11 CERAMIC CHIP 0.
MCM 21T1 The components identified by shading and mark ¡ are critical for safety. Replace only with part number specified. REF.NO. PART NO. L301 L401 L402 (a) DESCRIPTION 1-412-478-11 INDUCTOR 1-408-615-31 INDUCTOR 1-412-529-11 INDUCTOR REMARK REF.NO. PART NO. 0.
MCM 21T1 The components identified by shading and mark ¡ are critical for safety. Replace only with part number specified. (a) REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO.
MCM 21T1 The components identified by shading and mark ¡ are critical for safety. Replace only with part number specified. REF.NO. PART NO. (a)(ga)(g) DESCRIPTION REMARK REF.NO. PART NO. SG301 1-517-499-21 GAP, SPARK SG401 1-519-526-11 LAMP, NEON SG402 1-519-422-11 GAP, SPARK R7512 1-216-089-91 RES,CHIP R7513 1-216-093-00 RES,CHIP 1/10W 1/10W CERAMIC CHIP 0.01MF FILM 0.22MF CERAMIC CHIP 0.001MF FILM 0.1MF CERAMIC CHIP 0.1MF C7506 1-164-004-11 CERAMIC CHIP 0.
MCM 21T1 The components identified by shading and mark ¡ are critical for safety. Replace only with part number specified. (g) REF.NO. PART NO. C692 C693 C695 C697 1-111-016-11 1-130-495-00 1-164-644-11 1-136-165-00 DESCRIPTION ELECT FILM CERAMIC FILM REMARK 0.0012F 0.1MF 330PF 0.1MF 20% 5% 10% 5% REF.NO. PART NO.
MCM 21T1 The components identified by shading and mark ¡ are critical for safety. Replace only with part number specified. REF.NO. PART NO. (g)(d) DESCRIPTION REMARK REF.NO. PART NO. 1/4W 1/4W 1/10W DESCRIPTION REMARK R620 R621 R622 1-215-485-00 METAL 1-215-481-00 METAL 1-216-049-91 RES,CHIP 470K 330K 1K 1% 1% 5% R623 R624 R625 R626 R627 1-216-651-11 1-216-671-11 1-249-389-11 1-249-429-11 1-215-479-00 METAL CHIP METAL CHIP CARBON CARBON METAL 1K 6.8K 4.7 10K 270K 0.50%1/10W 0.
MCM 21T1 The components identified by shading and mark ¡ are critical for safety. Replace only with part number specified. (d) REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO. DESCRIPTION REMARK C009 C010 1-164-004-11 CERAMIC CHIP 0.1MF 1-163-237-11 CERAMIC CHIP 27PF 10% 25V 5% 50V C069 C070 1-163-021-91 CERAMIC CHIP 0.01MF 1-163-021-91 CERAMIC CHIP 0.
MCM 21T1 The components identified by shading and mark ¡ are critical for safety. Replace only with part number specified. REF.NO. PART NO. DESCRIPTION (d) REMARK REF.NO. PART NO. DESCRIPTION REMARK C531 1-163-021-91 CERAMIC CHIP 0.01MF 10% 50V C532 C533 C534 C535 C536 1-163-021-91 1-163-021-91 1-163-021-91 1-163-021-91 1-128-526-11 CERAMIC CHIP 0.01MF CERAMIC CHIP 0.01MF CERAMIC CHIP 0.01MF CERAMIC CHIP 0.
MCM 21T1 The components identified by shading and mark ¡ are critical for safety. Replace only with part number specified. (d) REF.NO. PART NO. DESCRIPTION D010 8-719-976-99 ZENER DIODE DTZ5.
MCM 21T1 The components identified by shading and mark ¡ are critical for safety. Replace only with part number specified. REF.NO. PART NO. (d) DESCRIPTION REMARK REF.NO. PART NO.
MCM 21T1 The components identified by shading and mark ¡ are critical for safety. Replace only with part number specified. (d) REF.NO. PART NO. DESCRIPTION REMARK R043 R044 R045 R046 1-216-065-91 1-216-095-00 1-216-073-00 1-216-675-11 RES,CHIP RES,CHIP RES,CHIP METAL CHIP 4.7K 82K 10K 10K 5% 1/10W 5% 1/10W 5% 1/10W 0.
MCM 21T1 The components identified by shading and mark ¡ are critical for safety. Replace only with part number specified. REF.NO. PART NO. (d) DESCRIPTION REMARK R564 R565 1-216-697-91 METAL CHIP 1-216-671-11 METAL CHIP 82K 6.8K 0.50%1/10W 0.50%1/10W R566 R567 R568 R571 R572 1-260-311-11 1-216-627-11 1-216-655-11 1-216-381-11 1-216-097-91 CARBON METAL CHIP METAL CHIP METAL OXIDE RES,CHIP 39 100 1.5K 0.22 100K 5% 1/2W 0.50%1/10W 0.
MCM 21T1 The components identified by shading and mark ¡ are critical for safety. Replace only with part number specified. (d)(h) REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO. DESCRIPTION REMARK R930 R933 R934 R937 R940 1-216-033-00 1-216-683-11 1-216-667-11 1-219-727-11 1-249-393-11 RES,CHIP METAL CHIP METAL CHIP METAL CARBON 220 22K 4.7K 68 10 5% 1/10W 0.50%1/10W 0.
MCM 21T1 The components identified by shading and mark ¡ are critical for safety. Replace only with part number specified. REF.NO. PART NO. (h)(j)(l) DESCRIPTION REMARK REF.NO. PART NO.
MCM 21T1 The components identified by shading and mark ¡ are critical for safety. Replace only with part number specified.
