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Hitachi CM615ET Service Manual

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CAUTION:
Before servicing this chassis, it is important that the service technician read the "Safety
Precautions" and "Product Safety Notices" in this service manual.
ATTENTION:
Avant d'effectuer l'entretien du châassis, le technicien doit lire les «Précautions de sécurité»
et les «Notices de sécurité du produit» présentés dans le présent manuel.
VORSICHT:
Vor Öffnen des Gehäuses hat der Service-Ingenieur die „Sicherheitshinweise" und „Hinweise
zur Produktsicherheit" in diesem Wartungshandbuch zu lesen.
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
SERVICE MANUAL
MANUEL D'ENTRETIEN
WARTUNGSHANDBUCH
OCTOBER 2000
No. 0502
CM615ET
CM615ET302
CM615ET303
CM615ET321
Data contained within this Service
manual is subject to alteration for
improvement.
Les données fournies dans le présent
manuel d'entretien peuvent faire l'objet
de modifications en vue de perfectionner
le produit.
Die in diesem Wartungshandbuch
enthaltenen Spezifikationen können sich
zwecks Verbesserungen ändern.
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  • Page 1 No. 0502 CM615ET CM615ET302 CM615ET303 CM615ET321 SERVICE MANUAL MANUEL D'ENTRETIEN WARTUNGSHANDBUCH CAUTION: Before servicing this chassis, it is important that the service technician read the “Safety Precautions” and “Product Safety Notices” in this service manual. Data contained within this Service manual is subject to alteration for improvement.

  • Page 2: Picture Position

    1 1 1 1 . DISPLAY ALIGNMENT A. Times & Display Size For all presetting mode listing in section 2.4 shall be within the limitation: H. WIDTH 306 ± 4 mm V. HEIGHT 230 ± 4 mm The external control range of the data area, shall be as follows; Max.

  • Page 3: Alignment Procedure

    D. Geometry Distortion (All Preset Mode) : 1) The Contrast and Brightness control shall be properly adjusted at 20 F-L with full intensity reverse pattern, then change to crosshatch pattern. 2) Pincushion distortion shall be less than H : 1.5% and V : 1.5%. 3) Barrel distortion shall be less than H : 1.5% and V : 1.5%.

  • Page 4: Focus Adjustment

    E-2. Light output adjust Select Timing 1, preset BRI. And CONT. to max. position. Adjust G2 to get G2 = 550V ± 10V Adjust VR803 to get light output = 0.6FL ~ 0.5FL Select Timing 2, adjust VR405 to get pattern over scan. (H SIZE 100%) F.

  • Page 5: Convergence Adjustment

    H. Convergence Adjustment Input R+B and R+G signals, make sure convergence within specified (if not 4 pole and 6 pole). A zone = 0.3MM., B zone 0.4MM. (X) < 0.4MM, (Y) < 0.4MM. NOTE : 1 A area = 230mm (circle) 2 B area = 306 x 230 mm I.

  • Page 6: Power Adjustment

    J. Power Adjustment ± J-1. Adjust the VR980, have the +15Vs be 15.3v 0.1v (the voltage of the C944) in timing 1. ± J-2. Check below items the voltage of C949 : 179 ± ± ± ± C947 : 75 ±...
  • Page 7 J-6. Preset Timing Adjustment 1. Input each PRESET MODE timing, and use front control key adjust the display to the normal position and size, and wait for 5 seconds. 2. Switch to next timing repeat 1 process. Until every PRESET MODE timing have been adjusted. J-7.
  • Page 8 PRESETTING MODES TABLE2 B:backporc D:display P:pulse F:front 25.175 31.469 31.778 25.422 3.813 70.087 14.268 11.122 1.875 0.064 1.207 25.175 31.469 31.778 25.422 59.940 16.683 15.253 1.0169 0.064 0.318 31.5 37.5 26.667 20.317 3.81 2.032 0.508 VESA 13.333 12.8 0.427 0.08 0.027 43.269 13.111...
  • Page 9 Fig. 2 Fig. 3...

  • Page 10: Control And Connect Layout

    2. CONTROL AND CONNECT LAYOUT Main PCB...

  • Page 11: Video Pcb

    B. Video PCB...

  • Page 12: Pin Assignment

    C. Pin Assignment C-1. Connect Function VR501 : H-CENTER VR P701 : TILT CONN P8 : CANCEL COIL CONN JP1: PRESET CONN P902 : DEGAUSSING COIL CONN P703 : X-RAY TEST PAD P302 P303 P301 HFLB Vout DSUB9 DDC-SCL EEP-SCL R-IN DDC-SDA EEP-SCL...
  • Page 13 3. Power Supply Portion...

  • Page 14: Operation Theorem

    4. OPERATION THEOREM A. Power Supply: Transfer AC source to DC source that supply all the circuit power. It includes: (1) +12V: For video pre-amp circuit, parts of horizontal and vertical deflection circuit. (2) +180V: For deflection and H.V circuit (3) +7.5V: For CRT heater and u-P power.
  • Page 16 F. Power Supply F-1. Rectifier And Filter Ckt: The 90Vac-265Vac input line voltage is rectified by D901- D904, and smoothed by C906 to provide DC operating voltage for the circuit. F-2. Flyback And Pwm Ckt : When power is initially applied to the circuit,C909 charges through R903, Q902.When the voltage across C909 reaches a level of 16V, U901 is enabled, turning on Q901 and turning off Q902 to complete start-up action.
  • Page 17 F-6. Degauss Ckt The DEGU signal which comes from micro-p to control degauss coil act or not. When DEGU is high, Q950 will be saturated to make RL901 working, AC line provides a degaussing current to degauss coil. F-7. OVERLOAD PROTECTION CKT The primary current flows through the current sensing resistor R914.
  • Page 18 G-3. Vertical Output IC U601(TDA 4866) is the vertical amp IC, the output pin6 connect to the YOKE .The sawtooth current float across the YOKE to make vertical deflection. Fig.3 is the block diagram of IC TDA4866 G-4. Horizontal Driver Circuit The driver pulse that come from U401 pin7 drive Q417,Q416,TO Q503,then transfomer T501 convert driver pulse to driver current to drive horizontal output transistor Q504.

  • Page 19: Flyback Transformer

    H. Flyback Transformer In the primary of F.B.T ,there is about 900Vpp in the LC resonant interval, It convert to the secondary of F.B.T to produce about 26KV for CRT anode voltage. The other bias for CRT IS G4.G3(4∼8KV),G2(0∼1000V)and G1(-160V)

  • Page 21: Video Amp. Circuit

    I. VIDEO AMP. CIRCUIT I-1. VIDEO PRE. AMP. The video pre-amp IC is U301(KA2143B). The input signal is 0.7Vpp, then pre-amp IC U301 amplify the video signal to 4~5Vpp. The WHITE BALANCE and CONTRAST shall be adjusted by adjustment the bias voltage of U301. Fig.4 is the block diagram. I-2.
  • Page 22 LM2439 Simplified Schematic Diagram (One Channel)

  • Page 23: Troubleshooting

    5. TROUBLESHOOTING A. Power Supply Check Start Check and replace EMI Filter Check and Q901, I/P Rectifer fuse open and filter Check and replace Q902, Q901 VDS Q903, U901, D908, R908 waveform normally? Is 8V Check D940, C940, Q940, in spec? Q941, VR980 Is 15V Check D941, C944, Q942, Q943...

  • Page 24: Monitor Check Flow Chart

    B. Monitor Check Flow Chart B-1. No Raster No raster Check Check power Check AC power supply indicator is lit power input circuit Check contrast & brightness Check U401 control adjust to MAX. Check Check U401 Check Q504 HEATER voltage= 6.3 VDC pin7 output collector voltage square waveform...
  • Page 25 No. 0502...
  • Page 26 No. 0502...
  • Page 27 Schematics and PCBs Supplement CM615ET CM615ET302 CM615ET303...
  • Page 28 D491 R491 FR104 C491 D406 ZD491 1/4W 470U 1N4148 HZ12B1 H-SIZE U403 B-DRIVE R471 LM358 C437 H-DRIVE R449 D494 18.2K 100U 1/4W R494 1N4148 15VS D404 FORM U401 R480 1N4148 PIN 26 1/4W C427 1/4W 1/4W R412 R451 C446 R468 Q420 C432 470U...
  • Page 29 C506 180P D503 R515 HER102 D507 105C Q504 Q522 T802 BYD73A T501 2SC5408 R813 VR501 1/4W C562 2SD667 1/4W 220U C501 R503 C502 C555 R512 L504 R508 C531 .22U D502 C507 3300P BEAD P802 330P R501 P501 C561 BY329 4700P R514 YOKE-H 220U...
  • Page 30 4148 8.4V POWER ON/OFF KIA7805P KEY-IN 33.1K- 36.1K- 40.1K- 44.1K- 52.1K- 31K-33K 62K-68K PT-002-B2 9.31K 220u .01u .01u 1.3K 5.1K 220u PAGE 4.7K PT-002-B2 FU/ADJ + 2.7K RA2 10KX6 10KX8 PT-002-B2 4.7K 3.6K FU/ADJ - 8.2K H-SIZE R68 10K H-PHASE PT-002-B2 5.6K R69 10K...
  • Page 31 101K 101K C992 C993 D944 D945 T900 R900 179V HD944 1W(F) R925 UF5408 UF5408 R903 C905 C907 R904 1M(S) C949 C910 BD901 3W(S) 1/2W 100U 222Y2 GBU4J C906 R926 C990 R990 250VB 220U GND1 GND5 1M(S) 400VA 101K 1/2W Q902 L941 KSP44 RT901...
  • Page 32 No. 0502 DEFLECTION & POWER BOARD - VA 717...
  • Page 33 U303 VIDEO BOARD U301 - VQ 602 U302 SOCK1 P303 P302 P301 SWITCH BOARD - VR 717 No. 0502 VIDEO & SWITCH BOARDS...
  • Page 34 Schematics and PCBs Supplement CM615ET321...
  • Page 35 < 33K 33~35K 36~40K 41~51K 52~57K 58~65K < 70K 34K< 34~40K 40~45K 45~51K 51~58K 58~61K 62~75K >75K SW 1 SW 1 SW 2 SW 2 SW 3 SW 3 SW 4 SW 4 1N4148 FOR 70K TABLE FOR 87K TABLE P103 &...
  • Page 36 R504 R501 R537 +15VS T501 H.V. Q517 C502 R811 +12V R538 R502 Q501 C501 .47U R505 R812 R542 P801 100U 2SC5521 H-DY R506 R543 C503 R531 .01U P802 D811 SMOD C805 1/2W R810 Q808 1N4148 2200P C504 D502 L806 2SA733 Q502 R823 BEAD...
  • Page 37 C960 R963 C963 JP903 10mm 472Y1 GND5 GND1 R902 1/2W Q962 L941 T901 D943 B649 C906 UF4006G R927 ERL39 R904 C907 220U +90V R903 R928 .01U 400V 1N5406*4 1/2W C947 1/2W R954 R965 R966 Q961 200VB 1/2W 1/4W D913 D905 D942 D901 D902...
  • Page 38 No. 0502 DEFLECTION & POWER BOARD - VA 739...
  • Page 39 U301 U201 VIDEO BOARD P301 - VQ709 SOCK1 U202 P303 P302 SWITCH BOARD - VR 739 No. 0502 VIDEO & SWITCH BOARDS...
  • Page 40 PARTS LISTS CM615ET301 CM615ET302 CM615ET303 CM615ET321...
  • Page 41 MECHANICAL PARTS LIST CM615ET-301, CM615ET-302 PART NUMBER DESCRIPTION FBH79931100 BUTTON FCV79921100 GUIDE L FCV79922100 GUIDE R FCH99941100 POWER LENS LCF56146007 WASHER MAB20085407 SCREW MAB70076400 SCREW MAB7T002401 SCREW FHM77734100 COPPER MYLAR CLA7M100200 DEGAUSSING COIL DC020130901 HOUSING CONNECTOR SET DC190015701 CABLE SIGNAL...
  • Page 42 MECHANICAL PARTS LIST CM615ET-303 PART NUMBER DESCRIPTION FBH79931100 BUTTONS FCV79921100 GUIDE (L) FCV79922100 GUIDE (R) FCH99941100 POWER LENS LCF56146007 WASHER MAB20085407 SCREW MAB70076400 SCREW MAB7T002401 SCREW FHM77734100 COPPER MYLAR CLA7M100200 DEGAUSSING COIL DC020141310 H-CON SET DC020130901 HOUSING CONNECTOR SET DC190018330...
  • Page 43 MECHANICAL PARTS LIST CM615ET-321 CRN PART NUMBER DESCRIPTION 001 FBH79931100 BUTTONS H79931 ABS 94V0 WG017 003 FCV79921100 GUIDE (L) V79921 (PC+ABS) (WG017) 004 FCV79922100 GUIDE (R) V79922 (PC+ABS) (WG017) 005 FCH99941100 POWER LENS H99941 007 LCF56146007 RUBBER WASHER F56146 (T=4.0MM SHORE:50) 008 MAB20085407 TAPPING SCREW TPB-4.0+20C-MC...
  • Page 44 PARTS LIST VA-602 DEF & POWER BOARD PART NUMBER DESCRIPTION PART NUMBER DESCRIPTION CJ001B6G0T8 0.01MF 50V MYLAR C444 CJ001B600T2 0.01MF 50V MYLAR CB2200242T2 220MF 10V +-20% C446 CB47003M0T4 470MF 16V CJ001B6G0T8 0.01MF 50V MYLAR C448 CJ001A6J000 0.1MF 50V CB01003M0TH 10MF 16V C456 CB047A6M0TH 4.7MF 50V CA033F6JHT0...
  • Page 45 PARTS LIST VA-602 DEF & POWER BOARD PART NUMBER DESCRIPTION PART NUMBER DESCRIPTION C828 CB01004M0TH 10MF 25V D405 T531053 1N4148 C829 CB02206M0TH 22MF 50V D420 T531053 1N4148 C833 CB0470441T3 47MF 25V +-20% D430 T531053 1N4148 C834 CJ001B6G0T8 0.01MF 50V MYLAR D431 T531053 1N4148...
  • Page 46 PARTS LIST VA-602 DEF & POWER BOARD PART NUMBER DESCRIPTION PART NUMBER DESCRIPTION D946 2398061 1N4002 ch t SAL JF0060 P902 DC03M007900 CONNECTOR WAFER D949 T531053 1N4148 P960 DC030008709 CONNECTOR WAFER D950 T531053 1N4148 PR901 CC0090884U0 9 OHM 5W +-30% D951 T531053 1N4148...
  • Page 47 PARTS LIST VA-602 DEF & POWER BOARD PART NUMBER DESCRIPTION PART NUMBER DESCRIPTION Q810 231M003R BF421 CE10022600H 10KOHM 1/8W +-5% Q811 BBX120600T8 RN1206 TE4M CE10022600H 10KOHM 1/8W +-5% Q812 BB32271N1T1 2SC2271 CC2702211T8 27KOHM 1/8W +-5% Q813 BB30945P1T5 2SC945P CC1203211T7 120KOHM 1/8W +-5% Q814 BB1073302T4 2SA733P...
  • Page 48 PARTS LIST VA-602 DEF & POWER BOARD PART NUMBER DESCRIPTION PART NUMBER DESCRIPTION R481 CE10022600H 10KOHM 1/8W +-5% R730 CC5111225T0 5.11KOHM 1/8W +-1% M.F. R482 700049 4.7KOHM +-5% CARBON FILM R731 CC4301125T0 4.3KOHM 1/4W +-1% R491 0188122M 220 OHM 1/2W +-5% R732 CC2002211T9 20KOHM 1/8W +-5%.
  • Page 49 PARTS LIST VA-602 DEF & POWER BOARD PART NUMBER DESCRIPTION PART NUMBER DESCRIPTION R910 700049 4.7KOHM +-5% CARBON FILM AB068610600 IC NT6861B MASK R911 CC1001111T7 1KOHM 1/4W +-5% AB024080002 IC 24LC08B R912 CC2702111T2 27KOHM 1/4W +-5% AB078050209 IC KIA7805P R914 CC033BG910H 0.33 OHM +- 5% 2W AB078120401 IC KIA7812A...
  • Page 50 PARTS LIST VQ-602 CRT BOARD PART NUMBER DESCRIPTION PART NUMBER DESCRIPTION U301 AB021430000 IC KA2143B/SID2140A03 D260 T531053 1N4148 U302 AB465420000 IC CM46542-011P D261 T531053 1N4148 U303 AB024390000 IC LM2439T D262 T531053 1N4148 U303a LCM55546000 HEAT SINK D265 T531053 1N4148 U303b MAA70006202 SCREW D266 T531053...
  • Page 51 PARTS LIST VQ-602 CRT BOARD PART NUMBER DESCRIPTION PART NUMBER DESCRIPTION Q335 231M001R BF420 R357 CC0300211T4 30 OHM 1/8W +-5% Q336 231M003R BF421 R364 CC3301211T4 3.3KOHM 1/8W +-5% R204 100057 470 OHM 1/8W =01000571/5 R365 CC2402211T0 24KOHM 1/8W +-5% R205 CC0100111T3 10 OHM 1/4W +-5% R367...
  • Page 52 PARTS LIST VR-701 SWITCH BOARD CRN PART NUMBER DESCRIPTION LED1 BC5G3393000 LED LYSG3393/R7 P102 DC020129301 HOUSING CONNECTOR SET P102 DC020129601 HOUSING CONNECTOR SET CC5101211T2 5.1KOHM 1/8W CC2701211T3 2.7KOHM 1/8W CC3601211T2 3.6KOHM 1/8W CC5601211T6 5.6KOHM 1/8W CC1301211T1 1.3KOHM 1/8W SW1 DE611000607 SWITCH SW2 DE611000607 SWITCH...
  • Page 53 Hitachi, Ltd. Tokyo, Japan International Sales Division THE HITACHI ATAGO BUILDING, No. 15 –12 Nishi Shinbashi, 2 – Chome, Minato – Ku, Tokyo 105-8430, Japan. Tel: 03 35022111 HITACHI EUROPE LTD. HITACHI EUROPE S.A. Dukes Meadow 364, Kifissias Ave. & 1, Delfon Str.

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