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File name M134A_Schem.pdf

File name M134A_Signal_flow.pdf

Av1 IN Av2 IN TUNER (FS) S Video Av2 IN Av1 IN AV Out BTSC Ic1001 MSP34X5G SIF RCH LCH IC 602 TDA7266 Rsp Lsp Z141 SAW I2C BUS IC 901 4052 Y/C IC 1211 COMB.F (TC90A49P) PI F & SI F CVBS IC 101 CVBS/YC Y Cb Cr Y/C CRT Drive EEPROM 24C08 Receiver AMP TMPA8809(M134C) MCU/V/C/D REMOTE HANDSET IC 301V.OUT 37 TDA8177 TV Body Button 38 H OUT +28V Power IC 801 STR-W6735 +13V +130V +12V 7809 7805 +9V FBT +5V Optional Function

File name M134A_TroubleShooting.pdf

Fuse Blown Figure 1 Fuse Blown Is IC801 PIN1 shorted to ground? No Is DB801 OK? No Replace DB801 Yes Yes Check / Replace IC801 Check the components such as C801, C802, C806, C807, C815, R801, etc. No raster Voltage abnormal + B Figure 2 No Raster, Abnormal +B Is + B, +13V, +12V, +9V shorted to ground? Check IC201, IC202 Yes and their peripheral components Yes Check Q820 Q821, Q823 Q822,Q825etc. No Check/Replace shorted component Yes Check IC801 and their peripheral components Yes Check T802 etc. Figure 3 No Raster, +B OK No raster, +B ok Is +9V, +5V Shorted to ground? NO Check/Replace short Y Is there an output waveform Pin13of IC101? No Yes Waveform at C of Q411? No Is the drive circuit ok? No Check\replace the drive circuit Yes Is R461 ok? Yes Increase VG2 No Replace R461 Is Pin2 of IC101 low voltage level? Yes Is B of Q202 low voltage level? Yes No No Yes Replace FBT NG Is both +14V and -14V ok? Yes Check horizontal scan circuit, such as C412, C413, C419, etc Is the waveform ok at Pin 6 of IC301? No Check vertical scan circuit Figure 4 No picture, dense noise dots No Picture dense noise dots Is the signal at Pin41, Pin42 of Is the antenna feed line or the adapter broken or unsoldered? Yes Fix the antenna fault No IC101 ok? No Is the signal at IF pin of the tuner ok? No Is the signal at Pin SCL, SDA of tuner ok? No Check signal at P5, P57, P58, P59, and P60 of IC101 and replace the abnormal related circuits Yes Check EEPROM Yes Is the supply voltage of tuner ok? No Check/Replace IC201, IC202, D101. Yes Check/Replace Tuner Yes Yes Check/Replace IC101 Check the related circuits of Q101, Figure 5 Symptom: raster ok, no picture, no sound, sparse noise dots Sparse Noise Apply the lead of a multimeter at R X 1 K , connect one probe to GND, use another to touch Pin42 of IC101. Are there interference particles screen? Yes Unsolder a pin of C107, apply the lead of multimeter at R X 1 K, connect the red probe + to GND, use the black probe - to touch B of Q101. Are there interference particles flashing on the screen? No Bridge a capacitor of 1000pF between the input and output of Z141. Apply the lead of multimeter at R X 1 K , connect the red probe + to GND, and use the black probe - to touch B of Q101 Are there interference particles flashing on the screen No No Does the IF pre-amplifier work normally? flashing on the No Is the voltage at Pin29, P36 of IC101 ok? No Check and repair the +9V power supply Yes Yes Replace Z141 (SAW) Yes Check & Replace the Tuner repair the IF pre-amplifier circuit No sound Figure 6 No Sound No Is the speaker ok? Yes Replace the speaker Replace Apply the lead of a multimeter at RX1K connect one probe to GND, use another to touch Pin4, Pin12 of IC602, Is there interference noise from the speaker. No Check power Yes supply of IC602 Is it mute at P6 of IC602? Yes Check/Replace Q601, Q602 Yes Is the waveform at Pin47 of IC1001 ok? Check/Replace the power supply of IC100

File name M134C_ALIGN.PDF

ALIGNMENTS Operating Conditions Unless otherwise noted, the following conditions must be observed when aligning this chassis: Chassis must be operated from a 120VAC isolation transformer, with line voltage set to 120VAC (±2.0V). Picture controls (color, brightness etc.) must be set to midrange. Procedures must be performed in the sequence given. A 10X probe must be used for oscilloscope and frequency measurements. The audio output leads must not be shorted together or to ground with the chassis on. All video signals must have -40 IRE sync tips unless specified otherwise. Chassis AC power must be removed for 10 seconds before disconnecting any cable. A 3-minute warm-up is required for chassis or module related alignments. A 15-minute warm-up is required for Kine related alignments. Required Test Equipment - Dual-Trace Oscilloscope - Digital Voltmeter - Frequency Counter - Audio Signal Generator - NTSC Signal Generator (B&K 1249, or equivalent) - MTS Signal Generator (B&K 2009, or equivalent) - Sweep/Marker Generator (or Standard Signal Generator) - DC Power Supply (5.0V/0.25A) for TAG001 Entering the Service mode 1. Enter the service mode (S-Mode) by pressing the VOLUME DOWN key on the instrument until the volume decreases to minimum. 2. Press the INFO key on the remote handset while holding the VOLUME DOWN key on the instrument. 3. Press the PROGRAM UP/DOWN buttons to select the different adjustments under the first menu and press the VOLUME UP/DOWN buttons to adjust the setting (value). 5. Press the OK button to toggle into the Main Menu selection mode and select the different Main menu sections using the PROGRAM UP/DOWN buttons. Press the OK button again to toggle back into the value adjustment mode. 6. Menus up to menu 19 can be selected directly using the remote control by pressing digital buttons 1~9, 0, notebook, CAP, Display, Sleep, Calendar, System/INS, Favourite, Return and Picture. 7. Press the Sound button to save the new settings and exit the service mode. Note: Many factory alignments appear in the menus but only the ones listed here can be changed. The values can be accessed and the value (hex number) on the screen can be changed but the actual value the instrument is using cannot be changed except at the factory using special equipment. The following is a list of all the menus and a description of the individual adjustments under each Main menu that can be changed. Only the following menu items can actually be adjusted. ALIGNMENTS (Continued) B+ Adjustment 1. Tune the instrument to receive a crosshatch signal. 2. Set the Preset Picture Mode to normal. 3. Adjust VR802 for 130Vdc +/- 0.5V at C422+ (B+). RF AGC Adjustment The RF AGC has been preset at the time of manufacture for optimum operation over a wide range of RF signal input conditions. Readjustment should not be required unless the tuner has been repaired or unusual signal conditions exist such as: a. Cable TV--adjacent channel interference. b. Picture bending and/or channel

File name M134C_partslist.pdf

M134C Symbol ADAPTER BEAD BEAD BEAD BEAD BEAD BEAD BEAD BEAD BEAD BEAD BEAD BEAD BEAD BEAD BLOCK BLOCK BRACK BRACK BRACK BRACK BRACK BRACK BRACKET BRACKET BRACKET BRACKET BRACKET BRACKET BRACKET BRACKET BRACKET BRACKET BRACKET BRACKET BRACKET BRACKET BRACKET BRACKET BRACKET BUTTON BUTTON BUTTON C008 C008 C008 C008 C008 C008 C008 C01 C01 C01 C01 C01 C01 C01 C021 C021 C021 Stock 268478 268283 268283 267016 268283 268283 267016 267016 267016 268283 267016 268283 267016 268283 267016 268479 267118 267056 267066 267066 267056 267056 267066 268452 268452 268452 267056 268397 268400 268401 268464 268452 268402 268452 268433 268401 267056 268397 268400 268402 268480 257999 267119 266985 266985 266985 266985 266985 266985 266985 268300 268300 268300 268300 268300 268300 268300 266581 266581 266581 Description KNOB ADAPTER FERR. BEAD HF70 4.5X5.0 FERR. BEAD HF70 4.5X5.0 FERR. BEAD BF60 FERR. BEAD HF70 4.5X5.0 FERR. BEAD HF70 4.5X5.0 FERR. BEAD BF60 FERR. BEAD BF60 FERR. BEAD BF60 FERR. BEAD HF70 4.5X5.0 FERR. BEAD BF60 FERR. BEAD HF70 4.5X5.0 FERR. BEAD BF60 FERR. BEAD HF70 4.5X5.0 FERR. BEAD BF60 POWER LINE BLOC BLOCK BRACKET BRACKET BRACKET BRACKET BRACKET BRACKET MAIN BD BRACKET MAIN BD BRACKET MAIN BD BRACKET BRACKET FBT BRACKET IR BRACKET LED BRACKET CRT BRACKET MAIN BD BRACKET CRT BRACKET MAIN BD BRACKET MAIN BD BRACKET LED BRACKET BRACKET FBT BRACKET IR BRACKET CRT BRACKET PUSH BUTTON BUTTON CLUSTER FUNCTION BUTTON CAP. CER 100PF 50V +/-5% CH CAP. CER 100PF 50V +/-5% CH CAP. CER 100PF 50V +/-5% CH CAP. CER 100PF 50V +/-5% CH CAP. CER 100PF 50V +/-5% CH CAP. CER 100PF 50V +/-5% CH CAP. CER 100PF 50V +/-5% CH CAP. ELEC 100 UF 25V +/-20% CAP. ELEC 100 UF 25V +/-20% CAP. ELEC 100 UF 25V +/-20% CAP. ELEC 100 UF 25V +/-20% CAP. ELEC 100 UF 25V +/-20% CAP. ELEC 100 UF 25V +/-20% CAP. ELEC 100 UF 25V +/-20% CAP. ELEC 10 UF 16V +/-20% CAP. ELEC 10 UF 16V +/-20% CAP. ELEC 10 UF 16V +/-20% Circuit INSTRUMENT ELECTRICAL COMPONENTS ELECTRICAL COMPONENTS ELECTRICAL COMPONENTS ELECTRICAL COMPONENTS ELECTRICAL COMPONENTS ELECTRICAL COMPONENTS ELECTRICAL COMPONENTS ELECTRICAL COMPONENTS ELECTRICAL COMPONENTS ELECTRICAL COMPONENTS ELECTRICAL COMPONENTS ELECTRICAL COMPONENTS ELECTRICAL COMPONENTS ELECTRICAL COMPONENTS INSTRUMENT ELECTRICAL COMPONENTS ELECTRICAL COMPONENTS ELECTRICAL COMPONENTS ELECTRICAL COMPONENTS ELECTRICAL COMPONENTS ELECTRICAL COMPONENTS ELECTRICAL COMPONENTS INSTRUMENT INSTRUMENT INSTRUMENT ELECTRICAL COMPONENTS ELECTRICAL COMPONENTS ELECTRICAL COMPONENTS ELECTRICAL COMPONENTS INSTRUMENT INSTRUMENT ELECTRICAL COMPONENTS INSTRUMENT INSTRUMENT ELECTRICAL COMPONENTS ELECTRICAL COMPONENTS ELECTRICAL COMPONENTS ELECTRICAL COMPONENTS ELECTRICAL COMPONENTS INSTRUMENT INSTRUMENT INSTRUMENT ELECTRICAL COMPONENTS ELECTRICAL COMPONENTS ELECTRICAL COMPONENTS ELECTRICAL COMPONENTS ELECTRICAL COMPONENTS ELECTRICAL COMPONENTS ELECTRICAL COMPONENTS ELECTRICAL COMPONENTS ELECTRICAL COMPONENTS ELECTRICAL COMPONENTS ELECTRICAL COMPONENTS ELECTRICAL COMPONENTS ELECT

File name M134_Sch_Audio.pdf

File name M134_Sch_Comb_Filter.pdf

File name M134_Sch_CRT_Drive.pdf

File name M134_Sch_Deflection.pdf

File name M134_Sch_IC101_Pinouts.pdf

File name M134_Sch_Key.pdf

File name M134_Sch_Power_Supply.pdf

File name M134_Sch_Video.pdf

File name M134_sf_systemcontrol.pdf

Chassis Part Symbol Defective Circuit m134 None System Control Symptom Servicer installed replacement chassis but the parental lock was turned on, blocking all programming except for commercials. According to the customer instruction book the code was supposed to have been set to 0000. This wasn't the case. Connector ( P001b) on replacement fpa is reversed. Set comes on as soon as you plug in, will not turn off and remote will not work. solution Pressing the vol+ on the remote & ch+ on the FPA the password came up as 1111. M134C fpa System Control reverse connector

File name M134_sf_vertical.pdf

Chassis Part Symbol Defective Circuit M134C D301 Vertical Symptom solution Vertical problem. Small picture with retrace and foldover. Vertical IC replaced several weeks ago. Pin 6 of vertical IC IC301 should be 14v. Was negative .3v. Pin 3 should be -12. Was -.02v. D301 open circuit. Replace IC301,D301 and C302