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Maxi 32D1240 Service Manual

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SERVICE MANUAL
1. Caution....................................................................................
2. Specification..............................................................................
3. Alignment Procedure..................................................................
4． Troubleshooting .....................................................................
5. Scheme Diagram........................................................................
6. Explode drawing................................................................................................
This manual is the latest at the time of printing, and does not
include the modification which may be made after the printing, by
the constant improvement of product
32D1240_3MS663

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Ayodele Oluwaseun
July 27, 2025

What is responsible for the TV not displaying pictures but talking

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Summary of Contents for Maxi 32D1240

  • Page 1 SERVICE MANUAL 32D1240_3MS663 1. Caution………………………………………………………………………… 2. Specification…………………………………………………………………… 3. Alignment Procedure………………………………………………………… 4． Troubleshooting …………………………………………………………… 5. Scheme Diagram……………………………………………………………… 6. Explode drawing....................This manual is the latest at the time of printing, and does not include the modification which may be made after the printing, by the constant improvement of product...
  • Page 2 SCHNEIDER ELECTRONICS GMBH-GERMANY 1. CAUTION CA UTION: Use of controls, adjustments or procedures other than those specified herein may result in hazardous radiation exposure. CA UT ION : T O RE DUCE TH E RIS K OF CA U T ION ELECTR ICA L SHOCK, DO NOT RE MOVE COVER (OR BACK).
  • Page 3 SCHNEIDER ELECTRONICS GMBH-GERMANY IMPORTANT SAFETY INSTRUCTIONS CAUTION: Read all of these instructions. Sa ve these instructions for later use . Follo w all W arnings and Instructions marked on the audio equipment. 1. Read Instructions-All the safety and operating instructionsshouldbe read before the productis operated. 2.
  • Page 4 SCHNEIDER ELECTRONICS GMBH-GERMANY PROTECTION AND LOCATION OF YOUR SET Do not use this television set near water ... for example, near a bathtub, washbowl, kitchen sink, or laundry tub, in a wet basement, or near a swimming pool, etc. Never expose the set to rain or water. If the set has been exposed to rain or water, unplug the set from the wall outlet and refer servicing to qualified service personnel.
  • Page 5 SCHNEIDER ELECTRONICS GMBH-GERMANY OPERATION OF YOUR SET 18. This television set should be operated only from the type of power source indicated on the marking label.If you are not sure of the type of power supply at your home, consult your television dealer or local power company. For television sets designed to operate from battery power, refer to the operating instructions.
  • Page 6 LCD TV SPECIFICATION RELEASE Version: V1.0 Issued Date: 2019.10.25 Model: 32D1240 HD MSD3663 DVB-T2/T/C Brand: Model No.: FORM VERSION: V1 PICTURE Panel Size (inch) 32" Category LCD TV Aspect Ratio 16:9 Color Temperature Cold/Normal/Warm SIGNAL FORMAT CAPABILITY Backlight Adjustable Component Video Format...
  • Page 7 MSD3663 Factory Menu Spec Rev:A/0 1. Introduction 0） SHIPPING INIT ： TV Initilization, and all parameter to be default. Designed for Shipment. 1） AGING MODE: TV aging mode switch. 2） ADC ADJUST：Change ADC parameters. 3） PICTURE SETTING：Change Picture Setting. 4） SOUND SETTING：Change Sound Setting. 5）...
  • Page 8 MSD3663 Factory Menu Spec Rev:A/0 2. ADC Adjust&WhiteBalance Auto Adjust...

  • Page 9: Picture Setting

    MSD3663 Factory Menu Spec Rev:A/0 3. PICTURE SETTING 0） Source：Choose source. 1） Picture Mode: Change picture mode parameters. 2） Picture Curve: Picture mode parameter curve. 3） WB Adjust: White Balance parameter setting. 4） Overscan : Overscan setting. 5） PQ Advanced: For PQ Adjustment. 6）...

  • Page 10: Picture Mode

    MSD3663 Factory Menu Spec Rev:A/0 3.1 PICTURE MODE 0） Source：Choose sources. 1） Picture Mode：Select picture mode which is same with main menu. 2） Contrast: Adjust contrast which is same with main menu. 3） Brightnesst: Adjust brightness which is same with main menu. 4）...
  • Page 11 MSD3663 Factory Menu Spec Rev:A/0 3.2 PICTURE CURVE Adjust the real value of main menu from 0 to 100 0） Source：Choose source. 1） Contrast：Adjust the real contrast for main menu from osd 0 to osd 100. 2） Brightnesst: Adjust the real brightness for main menu from osd 0 to osd 100.
  • Page 12 MSD3663 Factory Menu Spec Rev:A/0 3.2.1 Contrast 1） Contrast_0：The real value of main menu contrast osd 0. 2） Contrast_25：The real value of main menu contrast osd 25. 3） Contrast_50：The real value of main menu contrast osd 50. 4） Contrast_75：The real value of main menu contrast osd 75.
  • Page 13 MSD3663 Factory Menu Spec Rev:A/0 3.3 WB ADJUST White Balance Adjustment. This page only for current source White Balance Adjustment. Different source may have different values. There are Warm, Cool, Normal modes and save every separate source. We can change the R-GAIN, G-GAIN, B-GAIN, R-OFFSET, G-OFFSET, B-OFFSET.
  • Page 14 MSD3663 Factory Menu Spec Rev:A/0 3.4 OVERSCAN This page can adjust overscan. Note : Overscan should check with every timing .
  • Page 15 MSD3663 Factory Menu Spec Rev:A/0 3.5 PQ ADVANCED PQ Adjustment Page Adjust luminance, Colors, peakings ,NR and etc.

  • Page 16: Sound Setting

    MSD3663 Factory Menu Spec Rev:A/0 4. SOUND SETTING 0） Source：Choose source. 1） Sound Mode: BASS, TREBLE, EQ Settings.（For details, see 4.1） 2） Volume Curve: Adjust volume curve. （For details, see 4.2） 3） Audio Prescale ： Adjust the power of current source. 4）...

  • Page 17: Sound Mode

    MSD3663 Factory Menu Spec Rev:A/0 4.1 SOUND MODE 0）Choose source. 1）Sound Mode: Adjust sound mode. 2）Treble: Adjust the treble value of the current sound mode 3）Bass: Adjust the bass value of the current sound mode...
  • Page 18 MSD3663 Factory Menu Spec Rev:A/0 4.2 VOLUME CURVE NOTE： 1）Volume Offset : User overall volume control, every source has a unique value. 2）VOL1---VOL100 : All sources share a same value, make sure the next value bigger than the before. For example, 970, the VOL70 value, is bigger than 954, the VOL60 value.

  • Page 19: General Setting

    MSD3663 Factory Menu Spec Rev:A/0 5. GENERAL SETTING 0） Power Mode: On/Standby/Last boot status. 1） TEST PATTERN: Output test pattern, pure red, pure green and etc. 2） IMPORT/EXPORT：Import/export channel table. 3） ERASE DATA AREA：Erase data in the data area, which means that all the settings are initialized.
  • Page 20 MSD3663 Factory Menu Spec Rev:A/0 6. DEBUG 0） UART Debug: For deignger only. 1） Debug Message: For deignger only.

  • Page 21: Panel Setting

    MSD3663 Factory Menu Spec Rev:A/0 7.PANEL SETTING...
  • Page 22 MSD3663 Factory Menu Spec Rev:A/0 8.EMC SETTING...

  • Page 23: System Info

    MSD3663 Factory Menu Spec Rev:A/0 9.SYSTEM INFO...
  • Page 24 MSD3663 Factory Menu Spec Rev:A/0 10.SW UPGRAD 0） UPGRADE TV：Update item. 1） UPGRADE HDCPKEY: Upgrade HDCP key data. 2） ERASE HDCPKEY: Erase HDCP key data. 3）BIN NAME：The name of the firmware which is to be upgraded.
  • Page 25 Trouble shooting diagram Terms: IR: Infrared Receiver RC: Remote Control IR logic: IR blink with RC action LVDS: Low Voltage Differential Signal, output from processor and input for panel O/C: Open Cell, panel with source board BL: Back Light, light source for panel module LB: LED (Light Emitting Diode) Bar, light source for BL module VBL: Voltage for Back Light (before Boost) VLED: Voltage for LED (after Boost)
  • Page 26 1.No power No power LED, RC or Key can not turn on TV. Power LED no light/no change.
  • Page 27 2.No Display / Black Panel Back light is OK, sound is OK, but no picture.
  • Page 28 3.No back light Power LED logic OK, sound OK, but no picture(Different from No Display).
  • Page 29 4.No sound One or all signal source without sound.
  • Page 30 5.Signal source no function One or several source no function.
  • Page 31 6.Abnormal Display OSD NG or picture NG.
  • Page 32 POWER 反激线路 HSB1 CYB3 RB138 HSB3 HSB2 SGND CB118 RB124 RB125 RB126 RB131 EB2底部 D_QB101 TB102 RB127 HSB4 TB101 EB1底部 Vbridge DB102 RB135 D_QB801 RB132 EB104 EB105 RB141 RB133 SGND RB142 SGND CB117 CB109 RB128 CYB4 DB106 D_QB101 RB129 电路 UB102 CNB2 RB130...
  • Page 33 5V_STB +1.1V_VDDC 5V_STB +1.1V_VDDC CD10 RD25 CD12 CD11 CD27 CD14 CD15 CD26 CD22 CD23 CD28 CD16 RD24 CD13 CD18 RD28 RD10 5V_STB 5V_M CD19 3V3_Tun 3V3_STB GND/ADJ VOUT1 3V3_Tun 5V_M VIN1 VOUT1 5V_STB VIN2 VOUT2 3V3_STB GND/ADJ VOUT2 EPAD CD20 EPAD PW_EN_IC CD21...
  • Page 34 +1.5V_DDR +1.1V_VDDC +1.5V_DDR AVDD5V_MHL +1.5V_DDR 3V3_STB 3V3_STB +1.1V_VDDC +1.1V_VDDC +1.1V_VDDC +1.1V_VDDC 3V3_STB 3V3_AU 3V3_STB 3V3_DMPLL HDMI1_RXC_N RXCN_B AVDDL_MOD/VDDC +1.1V_VDDC 路 路 HDMI1_RXC_P PW_EN_IC RXCP_B GPIO16/PWR_ON/OFF HDMI1_RX0_N DVD_DAT RX0N_B GPIO17/VBL_CTRL HDMI1_RX0_P AMP_MUTE_IC RX0P_B GPIO18 HDMI1_RX1_N DVD_IR RX1N_B GPIO19/PANEL_ON/OFF HDMI1_RX1_P RXO0_N RX1P_B LVB0- HDMI1_RX2_N RXO0_P...
  • Page 35 3V3_STB CF10 RK11 K0/AD KEY_IC M_SCL_IC M_SCL/ M_SDA_IC M_SDA/ LVDS_SEL 3V3_STB K0/AD KEY/5V RK14 5V_M RXO0_N RXO0_P RXO1_N RXO1_P RXO2_N RXO2_P CF18 VCC_PANEL VCC_PANEL RXOC_N VCC_PANEL 3V3_STB RXOC_P VCC_PANEL RXO3_N RXO3_P CN16 RXO4_N RF10 3V3_IR 3V3_STB RXO4_P RF11 LVDS_SEL RK16 IR_IC LED_R RXE0_N...
  • Page 36 HDMI1_5V HDMI1_5V RH25 HDMI1_RX2_P HDMI_CEC HDMI_CEC_IC RX2a HDMI1_RX2_P HOTPLUG1 HDMI1_RX2_N HDMI1_RX2_N HDMI1_SCL RX2- CH14 CH15 HDMI1_RX1_P HDMI1_RX1_P HDMI1_SDA RX1a HDMI1_RX1_N HDMI1_RX1_N HDMI1_HPD_IC RX1- HDMI1_RX0_P RX0a HDMI1_RX0_P HDMI1_RX0_N HDMI1_RX0_N RX0- HDMI1_RXC_P HDMI1_RXC_P RXCa HDMI1_RXC_N HDMI1_RXC_N RXC- HDMI_CEC HDMI1_SCL RH15 HDMI1_SCL_IC HDMI1_SDA RH16 HDMI1_SDA_IC HDMI1_5V...
  • Page 37 USB0_M USB1_M USB_5V 5V-1 路 USB0_M USB_5V DM-1 路 USB0_DM 路 USB0_DM USB0_P USB1_M USB1_DM USB0_DP DP-1 USB0_DP 路 USB1_DM USB1_P USB1_DP GND-1 USB1_DP USB_5V 5V-2 5V_M USB1_M DM-2 USB_5V USB1_P USB0_P DP-2 USB1_P GND-2 CI18 RI45 SPDIF_OUT_IC SPDIF_OUT COAX COAX RI11 AV_IN...
  • Page 38 5V_CI CN11 5V_M 5V_CI VPP1 VPP2 PCM_D0 PCM_D1 PCM_CE_N CE1a PCM_D2 CE2a PCM_D3 PCM_D4 PCM_CD2_N CD2a PCM_D5 PCM_CD1_N CD1a PCM_D6 VS1a PCM_D7 IOIS16a PCM_WAIT_N WAITa INPACKa PCM_IRQA_N IRQa PCM_RESET RESET PCM_IOWR_N 5V_CI IOWRa PCM_IORD_N TSI_SYNC PCM_IRQA_N IORDa MISTRT PCM_OE_N TSI_CLK' TSI_CLK MCLKI PCM_WE_N...
  • Page 39 CA33 AMP_MUTE_IC AMP_MUTE/ RA14 AMP RIN PH_AROUT CA36 RA16 AMP LIN PH_ALOUT CA37 RA10 CA34 CA35 RA18 AVCC RS19 CS11 PH_ALOUT SC_AU_LOUT_IC CS59 AMP_MUTE/ PVCCL FAULT PVCCL CA11 AMP LIN CA10 LOUT+ LINP BSPL CA12 CA13 CA14 LBA1 CA15 LINN OUTPL RS16 CS10...
  • Page 40 3V3_Tun_T CT39 RFT1 CT33 T2_RF RF_INPUT LT13 3V3_Tun_T CT22 RFIN AVDD LT12 IM_T IM_T_M RFT5 RFIN2 3V3_Tun_T LT10 IP_T IP_T_M 3.3V IFAGC_R842 RT14 T2_SCL VAGC CT21 RT15 T2_SDA DECT1 VAGC2 R842_XO XTAL_O IM_T_M IF_N IP_T_M RT13 IF_P IFAGC_T IFAGC_T IF_AGC T2_SCL CT37 T2_SDA...