Hitachi 32LD7200 Service Manual
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Hitachi 32LD7200 Service Manual

Hitachi 32LD7200 Service Manual

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See also: User Manual
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

Colour Television

March 2005
No. 0207
32LD7200
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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Questions and answers

August Beck
February 15, 2025

hitachi model PW2L 32LD7200: nach dem einschalten kommt ein krächzender Ton der dann nach ca.3minuten wieder ok ist.

0
1 comments:
Mr. Anderson
February 15, 2025

A crackling sound in the Hitachi 32LD7200 after turning it on that resolves after about three minutes could be caused by the power supply components stabilizing as they warm up. Possible causes include:

1. Inverter or Power Supply Noise – Components in the inverter or power supply may produce noise as they stabilize after startup.
2. Speaker or Audio Amp Issues – The audio amplifier or speaker connections may have minor instability when cold, which improves as the components warm up.
3. Capacitor Aging – Aging capacitors in the power supply or audio circuit may cause temporary instability, leading to crackling sounds that resolve after warming up.

Checking the power supply and audio circuits for aging components or poor connections may help resolve the issue.

This answer is automatically generated

0

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Summary of Contents for Hitachi 32LD7200

  • Page 1: Colour Television

    No. 0207 32LD7200 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: Caution For Safety

    32LD7200 (PW2L) CAUTION FOR SAFETY Please read this page before repair the monitor. This page explains to following items for keep the safety of set and prevent to accident during repair work. We explain by symbol at happen the damage or injury when took wrong repair.
  • Page 3 32LD7200 (PW2L) PRECAUTIONS How to clean the LCD screen panel of the monitor Before cleaning the monitor, turn off the monitor and disconnect the power plug from the power outlet. To prevent scratching or damaging the LCD screen face, do not knock or rub the surface with sharp or hard objects.

  • Page 4: Specifications

    32LD7200 (PW2L) 2. Specifications Display Approx. 32 inches (698 (H) x 392 (V) mm, diagonal 800mm) dimensions Panel Resolution 1366(H) x 768 (V) pixels Net dimensions 1015 (W) x 618 (H) x 340 (D) mm (excluding Speakers/Stand) Net weight 25.0kg...

  • Page 5: Service Points

    32LD7200 (PW2L) 3. Service points Lead free solder This product uses lead free solder (unleaded) to help preserve the environment. Please read these instructions before attempting any soldering work. Caution: Always wear safety glasses to prevent fumes or molten solder from getting into the eyes. Lead free solder can splatter at high temperatures (600˚C).

  • Page 6: Component Names

    32LD7200 (PW2L) 4. Component names [Main unit] Control panel • Adjustment buttons are located on the top. Remote-control receiver Indicating lamp SUB-POWER button • The main power switch is located on the top. Main power switch VOLUME UP/DOWN buttons Front...

  • Page 7: New Adoption Technology

    32LD7200 (PW2L) 5. New adoption technology [System control micom I001(M3062)] Pin function table PIN name FUNCTION VREF (+5.0V) +5.0V OSD_DATA OSD DATA OSD_CLK OSD CLK Head Phone Volume HP_VOL FE.AGC_O(M) AGC Voltage(F/E) FC DATA DATA_OUT(FC) FC DATA DATA_IN(FC) FC CLOCK...
  • Page 8 32LD7200 (PW2L) PIN name FUNCTION CPUGO(PM_CPU) PDP PALEL Contorol EPM (FLASH) FRASH MEMORY Writing VIDEO.DET_1 Detecting VIDEO PWB SCL1 I2C to PWB TUNER side FE/MSP3455or MSP3415G/SAA5361/TB1274(Sub)/M306V7/M62320P SDA1 I2C to PWB TUNER side FE/MSP3455or MSP3415G/SAA5361/TB1274(Sub)/M306V7/M62320P HDMI-RESET HDMI-Reset HDMI-HPD_RESET Hot Plug Detect Reset VIDEO.DET_2...
  • Page 9 32LD7200 (PW2L) PIN name FUNCTION CONTROL LCD PANEL SCL0 C-BUS Contorol CLOCK SDA0 C-BUS Contorol DATA SCL3(EEPROM) I2C-BUS Contorol CLOCK SDA3(EEPROM) I2C-BUS Contorol DATA Detecting HDMI circuit connection HDMI_CIR_DET EXT_RESET EXTERNAL RESET OSD_CS OSD CS FC_ENABLE FC ENABLE DTT IRQ...
  • Page 11 32LD7200 (PW2L) 6. Adjustment ● How to get to Adjustment mode Using the center of the upper control buttons with the set turned off (standby) can activate it. Press the SUB-POWER( ) button, INPUT SELECT( ) button and button at the same time, and hold for more than 5 seconds.
  • Page 12 32LD7200 (PW2L) Service adjustment items by I C-bus control (MAIN Part)
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  • Page 23 32LD7200 (PW2L) Main/Sub YFRUR passage level [MYNRP6] 480i/576i (HDMI) [MYNRP7] 480p/576p (HDMI) [MYNRP8] 1080i-50/720p-50 (HDMI) [MYNRP8’] 1080i-60/720p-60 (HDMI)
  • Page 24 32LD7200 (PW2L)
  • Page 25 32LD7200 (PW2L) Service adjustment items by I C-bus control (SUB adjust menu)
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  • Page 29: Factory Reset

    32LD7200 (PW2L) Horizontal Enhancer Gain for Y/G [YHEG2] Factory Reset After all of the adjustments of main chassis are finished, perform FACTORY RESET. Press the SUB-POWER( ) button, INPUT SELECT( ) button and button at the same time, and hold for more than 5 seconds.
  • Page 30 32LD7200 (PW2L) [NOTE] Never adjust without use of the specified signal. If that were done by mistake, the picture would become abnor- mal in black level, contrast and color. In this case, it will be recovered by re-adjustment in the specified way.
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  • Page 34: Troubleshooting

    32LD7200 (PW2L) 7. Troubleshooting How to get to Burn-in mode This mode displays the test patterns of some single color raster in turn. These signals are from built-in generator of LCD panel. So it can be presumed that maybe the panel has some trouble when the screen of Burn-in mode is abnormal.
  • Page 35 32LD7200 (PW2L) [ Power ] er cannot be turned on (LED does not light) Is the input voltage applied to Power supply unit? (CN5 [1][3]) Power Power supply Power board switch inlet unit Are the voltages applied to P803 [1][2][5], P804[1],P807[4]...
  • Page 36 32LD7200 (PW2L) [ Power ] Picture is not displayed (LED is lighting) Is the LED red or green/orange? green/orange Is Voltage applied to P804[1]pin of the Power supply unit? Is it the power [1] +5V saving mode? Power supply Input signal Cable...
  • Page 37 32LD7200 (PW2L) [ Teletext Circuit ] No Teletext Teletext(normal) Exchange Video Finish repair Still no Teletext Change back original Video PWB Teletext(normal) Exchange Tuner Finish repair Still no Teletext Change back original Tuner PWB Teletext(normal) Exchange Finish repair Formatter PWB...
  • Page 38 32LD7200 (PW2L) [ Signal Circuit ] no picture of TV the waveform at pin 49 of PTV2 (TV, CV)? picture (normal) Exchange Video Finish repair picture (normal) No picture Exchange tuner Change back original Video PWB No picture Change back original...
  • Page 39 32LD7200 (PW2L) [ Sound Circuit ] No sound of TV sound (normal) Exchange Video Finish repair Still no sound Change back original Video PWB sound (normal) Exchange Finish repair Formatter PWB Still no sound Change back original Formatter PWB sound (normal)
  • Page 40 32LD7200 (PW2L) [ HDMI PWB Circuit ] No HDMI (no picture, no color or dark) HDMI (normal) Exchange HDMI Finish repair Still no HDMI Change back original HDMI PWB HDMI (normal) Exchange Finish repair Video PWB Still no HDMI Change back original...
  • Page 41 32LD7200 (PW2L) [ Swivel Circuit ] No swivel (can not operate) Exchange Video Finish repair Change back original Video PWB Exchange Finish repair Formatter PWB Change back original Formatter PWB Finish repair Exchange Joint PWB Change back Joint PWB Exchange stand...
  • Page 42 32LD7200 (PW2L) 8. Seif-Diagnosis Function Signal circuit self-diagnosis function This function is for the failure of the signal circuit, for example the phenomenon as below: "Sometimes power turns off abnormally." "Sometimes picture disappears abnormally." To enter to this Self-Diagnosis mode, follow the next steps: Preparation: 1) The Power Cord should be connected to AC line and the Main Power switch should be turned on.

  • Page 43: Block Diagram

    32LD7200 (PW2L) 9. Block diagram Block diagram 1/2 INVERTER Backlight LCD Panel Moduie Inverter Power AC100V Sub Power Unit -240V Noise Filter Power Unit (Main Power circuit) Main Power SW Signal Power TACT SW PWB Remote Control LED PWB Speaker x 2...
  • Page 44 32LD7200 (PW2L) Block diagram 2/2...

  • Page 45: Disassembly Diagram

    32LD7200 (PW2L) 10. Disassembly diagram PC+ABS...
  • Page 46 32LD7200 (PW2L) Panel Module inverter Panel Module Spare Part Name Spare Part No. Panel Module* DD00691 Inverter board (one pair) TP01374 * Panel Module with inverter board...
  • Page 47 32LD7200 (PW2L) Caution Assembly / Disassembly Please be careful not to give stress on the power boards R141 and R133 by pushing the cables while dealing with the clamp of cables next to the power boards. In case of detaching the cable from the clamp (1) Detach the connector from the power board.
  • Page 48 32LD7200 (PW2L) Make sure to set the guide posts of unit deep enough into the hole on the in display when inserting the video unit. In case that it is stuck during the mounting, please readjust the position without pushing it by constraint.
  • Page 49 THE UPDATED PARTS LIST FOR THIS MODEL IS AVAILABLE ON ESTA...
  • Page 50 32LD7200 (PW2L) 12. Connection diagram...
  • Page 51 32LD7200 (PW2L) 13. Wiring diagram FERRITE CORE CONTROL board ECONT P801 POWER SW PJP1 PJP2 PJF2 PAF2 PAJ1 P802 PJP3 PJF1 P903 PAS1 P806 P904 PJA1 JOINT board AUDIO board POWER board PJF5 PJF6 FERRITE CORE To Panel PJP4 PAS2...
  • Page 52 32LD7200 Power supply – Formatter PCB - 39012588006 PK101V01610 PWB sub power switch TP01331 Tuner PCB - 455AC988001 Video PCB - 452AC388001 Power input TP01342...
  • Page 53 Formatter PCB - 39012588006 HDMI PCB - 39012588011...
  • Page 54 VIDEO board 1 (PW2L)
  • Page 55 VIDEO board 2 (PW2L)
  • Page 56 VIDEO board 3 (PW2L)
  • Page 57 VIDEO board 4 (PW2L)
  • Page 58 Fax: +46 (0) 8 562 711 13 Tel: +39 02 38073415 Servizio Clienti Email: csgswe@hitachi-eu.com Fax: +39 02 48786381/2 Email: customerservice.italy@hitachi-eu.com HITACHI EUROPE S.A.S HITACHI EUROPE LTD (Norway) AB Lyon Office STRANDVEIEN 18 B.P. 45, 69671 BRON CEDEX 1366 Lysaker FRANCE...

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