1. Manuals
  2. Brands
  3. Hitachi Manuals
  4. Monitor
  5. CML152XW - 15" LCD Monitor
  6. Service manual

Hitachi CML152XW Service Manual

Hide thumbs Also See for CML152XW:
Table of Contents

Quick Links

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.
SAFETY................................................................................................................................................................2
ELECTRICAL REQUIREMENTS .........................................................................................................................5
ADJUSTMENT CONDITIONS .............................................................................................................................8
ADJUSTMENT OF BOARDS ...............................................................................................................................9
CIRCUIT DESCRIPTION ...................................................................................................................................20
TROUBLESHOOTING .......................................................................................................................................23
SCHEMATIC DIAGRAMS .................................................................................................................................28
EXPLODED VIEWS ..........................................................................................................................................38
REPLACEMENT PARTS LIST .........................................................................................................................40
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
HIGH RESOLUTION COLOUR LCD DISPLAY MONITOR
SERVICE MANUAL
MANUEL D'ENTRETIEN
WARTUNGSHANDBUCH
CONTENTS
APR 2001
No. 0531
CML152XW
Data
contained
within
this
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.
Service
Table of Contents
loading

Related Manuals for Hitachi CML152XW

Summary of Contents for Hitachi CML152XW

  • Page 1: Table Of Contents

    No. 0531 CML152XW 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: Safety

    ALL PRODUCTS CE MARK Before any service is performed on the chassis an 1. HITACHI products may contain the CE mark on isolation transformer should be inserted between the the rating plate indicating that the product power line and the product.
  • Page 3 POUR TOUS LES PRODUITS LABEL CE Avant d’effectuer une intervention d’entretien sur le 1. Les produits HITACHI peuvent avoir reçu le label châssis, vous devez insérer un transformateur d’isolement CE qui figure sur la plaque signalétique pour indiquer entre la ligne d’alimentation électrique et le produit.
  • Page 4 Hochspannung sollte immer auf den festgelegten Der Gebrauch von Ersatzteilen, die nicht dieselben Wert des Gehäuses beschränkt bleiben und nicht Sicherheitsmerkmale haben wie die empfohlenen mehr. Betrieb bei höherer Spannung kann zum HITACHI Ersatzteile, wie sie in der Ersatzteilliste Versagen Bildröhre oder hoher aufgeführt sind, kann zu elektrischem Schlag, Feuer,...

  • Page 5: Electrical Requirements

    ELECTRICAL REQUIREMENTS LCD Panel Specification Display: 15 inch (15” viewable image size): active matrix: thin film transistor (TFT): liquid crystal display (LCD): 0.297 mm dot pitch: R.G.B. Vertical stripe 200 cd//m white luminance, typical: 250:1 contrast ratio, typical Compatibility: 640 x 350: VGA-350 720 x 400: VGA text 640 x 400: VGA-GRAPH 640 x 480: VGA, 60Hz to 75 Hz vertical refresh rate...
  • Page 6 Controls Control panel (monitor front panel) Power LED, ( Please refer to C-2 LED definition table) Vr1: Volume Control. Ear Phone Jack Adjust decrease. Adjust increase. Function select counter-clockwise. Function select clockwise. Power ON/OFF switch, push to ON and push to OFF. (toggle switch) Power Management Power Management condition and status State...
  • Page 7 Power Consumption Meet VESA DPMS Proposal On mode 25 W max Stand-by 5 W max Suspend 5 W max Off mode 5 W max DC power off 5 W max disconnection 5 W max Measured from AC input end of AC power adapter. Display Modes FOR Inspections Supported Timing (Unsupported timing will go to power saving mode) T FH(KHZ)

  • Page 8: Adjustment Conditions

    ADJUSTMENT CONDITIONS Measuring Apparatus Used Necessary measuring equipment for the adjustment of LA-1221JMW’s MAIN PWB are as follows: • Adjusted Video Generator. • Oscilloscope (more than 4 channels required) • DC voltmeter • Audio analyzer (Panasonic VP-7723A) Input Signal Input signal from the video signal generator, via the VGA Card port for this adjustment. Indication Input signal from the video signal generator, via the VGA Card port for this adjustment.

  • Page 9: Adjustment Of Boards

    ADJUSTMENT OF BOARDS Equipment is connected with boards to be inspected before adjustments. Refer to diagram below. Connection Method • LCD Signal Cable • LCD Lamp Cable • Inverter Cable • Audio Cable • Controller Cable • AC-In Cable • R. G. B Signal Cable...
  • Page 10 VL-515 DISPLAY CONTROL BOARD Description The VL-515 display control board is designed to directly convert the R.G.B signals from VGA Card D sub-port to optimum LCD timing signals so as to construct a high display quality LCD monitor. Features • On board sage chip to detect display timings and control user functions.
  • Page 11 automatically noted and adapted to. Sure-Sync allows Cheetah4 to generate very high quality output by providing the chip with clean, crisp input signals. The Cheetah4 contains on-chip line buffers to upscale an image, without the need for external frame buffer memory. On-chip gamma correction lookup tables (color translation memories) are used to enable user programmable brightness, contrast, and gamma correction control.
  • Page 12 Pin No. Signal Comment 12 VCC 12 VCC Power Input 5 VCC 5 VCC Power Input Terminal No. Symbol Function Ground BLUE DATA B7 (MSB) EVEN BLUE DATA B6 EVEN BLUE DATA B5 EVEN BLUE DATA B4 EVEN Ground BLUE DATA B3 EVEN BLUE DATA B2 EVEN...
  • Page 13 RED DATA R3 EVEN RED DATA R2 EVEN RED DATA R1 EVEN RED DATA R0 (LSB) EVEN Pin No. Signal Comment 12 V Inverter Power Input. 12 V Inverter Power Input. BLON Bright Light ON/OFF high active. Inverter Power Input. BRIGHT Brightness Adjustment.
  • Page 14 VK-515 Control Panel and Audio Board Description The VK-515 is designed to offer a user interfaced control panel which passes and receives signals to and from VL-515 display control board. Also there is a stereo audio amplifier to drive a pair of speakers. When in power saving mode the audio circuit can be turned off by the control signal from the VL-515 board.
  • Page 15 KEY-UP Function select up to VL-515 KEY-DOWN Function select down to VL-515 KEY-R Function select right to VL-515 KEY-L Function select left to VL-515 KEY-PWR Power ON/OFF signal to VL-515 J3 and J4 Pin No. Signal Comment LO (RO) Speaker out OUTL - (OUTR-) Speaker out Pin No.
  • Page 16 Variable resistor VR1:Volume control, clockwise for increasing; counter-clockwise for decreasing ° ° ° ° Electrical characteristics (T Audio amplifier (Use Panasonic VP-7723A Audio Analyzor). Item Audio Input Freq. Spec. Comment Min. Typ. Max. Input Voltage(V) 11.4 12.6 Input Current(mA) Audio Voltage Gain 500mVrms 1KHz 14dB...
  • Page 17 Connector Locations Connector type Location Type Maker Number of pins J801 DC-IN J802 B4B-XH-A 96113-0803 E&T SCJ-0345-1-X-S Connector pin Assignment J801 DC 12V Input Pin No Signal Comment Pin 1 +12V From adapter output cable Pin 2 From adapter output cable J802 FOR I/F CKT Pin No Signal...
  • Page 18 J3 AUDIO INPUT Pin No Signal Comment Pin 1 Pin 2 IN-R Audio input R Pin 3 IN-L Audio input L VI-515 INVERTER BOARD Description The VI-515 Inverter board is designed for lighting up the back-lights of LCD module. Electrical characteristics MIN.
  • Page 19 Connector locations Connector pin Assignment P901 Pin No. Signal Comment Power from VL-515 BLT_ON Back-light ON/OFF control , high active(3.3V) +5VS +5VS BRITE BRITE Brightness (0-5V)control from VL-515 5V for min. brightness P920 & P960 Pin No. Signal Comment Low voltage (common) High voltage for lamp...

  • Page 20: Circuit Description

    CIRCUIT DESCRIPTION Micro-Controller Circuit The U2 (MX10 F MAXD0C) is a system controller. The Y1 is 14.318MHz XTAL. Plug and Play Circuit Plug and play allows the serial communication of host PC and peripherals offering minimal configurations to end users. This monitor supports DDC2B communication protocol. SDATA and VCLK are input to U9 (24LC21) and U4 (24LC16).
  • Page 21 Introduction Front Panel Control and Led Front Panel Controls Item Control Function Power Switch Turns the monitor on and off. Power LED 1. Green indicates monitor is turned on. 2. Yellow indicates DC power off. 3. Amber indicates stand-by, suspend, off mode. Function Button Launches OSD function menu circularly Plus Button...
  • Page 22 Rear Panel connector Input Signals Rear Panel Cable and Connector Item Cable / Connector Function Signal Connector Connects the video cable Power Connector Connects the adapter cable Audio connector Connects the audio cable...

  • Page 23: Troubleshooting

    TROUBLESHOOTING Main Procedure...
  • Page 24 Power Circuit Troubleshooting...
  • Page 25 Backlights Troubleshooting...
  • Page 26 Performance Troubleshooting...
  • Page 27 Function Troubleshooting...

  • Page 28: Schematic Diagrams

    3.3V_VDD BLM21P300S RC0805D 0.01uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 22uF/35V 22uF/35V LCM35H02 RP14~RP19 use 22 ohm LCM35H03 RP1~RP13 use 120 ohm CHEETAH4 B[0..7] ODD_R[0..7] B[0..7] ODD_R[0..7] PDATA0 ODD_R0 DBLUE7 PDATA0 PDATA1 ODD_R1 DBLUE6 PDATA1 PDATA2 ODD_R2...
  • Page 29 5VCC 0.1uF 5VCC INTERNAL EEPROM CHOICE "R1 & R8" EXTERNAL 5VCC EXTERNAL EEPROM CHOICE "R2 & R9" 0.1uF EEPROM MCAD[0..7] 0.1uF# 22pF U1 74HCT373# 22pF MCAD0 MCAD0 MCA0 EA/VP P0.0 MCAD1 MCAD1 MCA1 P0.1 5VCC MCAD2 MCAD2 MCA2 XTAL1 P0.2 R4 rework 14.318MHz MCAD3...
  • Page 30 VDEC VPLL 3.3V_VDD 3.3V_PLL ESD parts LCM35H02 RP14~RP19 use 22 ohm SLVU2.8# SLVU2.8 *All Res. and Cap. is 0603. 10uF/16V LCM35H03 RP14~RP19 use 120 ohm DIO/MA730 3.3V_PLL PC_R SLVU2.8# RP14 0.047uF PC_LR DrA0 PC_G DrA1 62pF# DrA2 FCM1608C-300T06 DrA3 SLVU2.8# PC_R Fred 5V_DDC...
  • Page 31 Reset Power input (+12V,+5V) Note: Reset Source Select MCP120-450G-I/TO# KIA7442F# 12VCC 13K# VDD_RST VDD_RST MCP120-450G-I/TO SMD185 12VCC 5VCC RESET KIA7442F +12V 12VCC +12V_I Reset RESET +12V_I TO92 0.1uF JUMPER WIRE P5 10K# 100uF/16V 0.1uF RESET ACES_87506_0400 JUMPER WIRE P5 RESET Reset RESET 5VCC...
  • Page 32 ODD_R0 ODD_R1 RGB DATA ODD ODD_R2 ODD_R3 ODD_R4 *All Res. and Cap. is 0603 except R65 is 1206. CPT Panel connector ODD_R5 ODD_R6 ODD_R7 ODD_R[0..7] ODD_G0 EVEN_B7 SHFCLK_1 ODD_R[0..7] ODD_G1 EVEN_B6 ODD_G2 EVEN_B5 DE_1 DENA ODD_G3 EVEN_B4 ODD_G4 V_SYNC ODD_G5 EVEN_B3 ODD_G6 EVEN_B2...
  • Page 33 SP051005300 T920 P920 CCFL C913 C920 10U 50V NP 220P 3KV BAV99L D920 VADJ C900 220U/25V low ESR R901 R915 P901 1K 1206 C904 1K 1206 E&T 96113-0703 R906 R920 VREF 1.15K 1% D901 4148 C901 R903 R905 470K 1206 470K 1206 470K 1206 30.9K 1%...
  • Page 34 Audio board connector OUTR+ 150 1/8W 1% OUTR- OUTL+ OUTL- 150 1/8W 1% SCJ-0348-C E&T_96113-0813 AGND SP_L1 AGND ACES_87502_0200 STRAIGHT/2.5 ACES_87502_0200 STRAIGHT/2.5 SP_R1 MainBoard MUTE connector LED_Y LED_G KEY_UP KEY_DOWN KEY_R KEY_L KEY_PWR E&T_96113_1013 LYG2093 YEL/GRN (S2) (S3) (S4) (S5) 100 1/8W 5% 1/20W 10KZ...
  • Page 35 +12V (To DC-DC) KA7809 DPAK-G 0.1uF 1000uF/16V 4.7uF/35V 0.01uF OUTR+ INV1 OUTR+ OUTR- OUTL+ INV2 OUTR- 4.7uF/35V OUTL- SCJ-0345-1-X-S OUTL+ 0.01uF E&T_96113-0803 OUTL- NC/10uF16V 0.1uF 0.1uF TDA7053A 4.7K 4.7K 0.47uF 0.47uF BOTTOM VIEW 1 1% 1 1% 0.1uF Title SCHEMATIC, AUDIO VM-515 Size Document Number 405A26...
  • Page 36 +12V (To Audio AMP) J802 JST B4B-XH-A PAD (SHORT) R811 R812 150 1206 150 1206 C806 474 1206 R806 5.6k 0603 5% 1N4148 D802 1N4148 SI4800 D805 Q804 Q801 L802 L803 DTC124EK 100UH BLM21P300S C809 10U 50V 4X5.4mm ZD801 R813 6.2C R807 C807...
  • Page 37 +12V (To Audio AMP) J802 JST B4B-XH-A F801 SMD(CM870 ONLY) SHORT R811 R812 C806 474 1206 R806 5.6k 0603 5% 1N4148 D802 D805 1N4148 SI4800 Q804 Q801 L802 L803 DTC124EK 56UH BLM21P300S C809 10U 50V 4X5.4mm ZD801 R813 6.2C R807 C807 C812 D803...

  • Page 40: Replacement Parts List

    THE UPDATED PARTS LIST FOR THIS MODEL IS AVAILABLE ON ESTA...
  • Page 41 Fax: +46 (0) 8 562 711 13 Tel: +39 02 38073415 Servizio Clienti Email: [email protected] Fax: +39 02 48786381/2 Email: [email protected] HITACHI EUROPE S.A.S HITACHI EUROPE LTD (Norway) AB Lyon Office STRANDVEIEN 18 B.P. 45, 69671 BRON CEDEX 1366 Lysaker FRANCE...

Table of Contents