Sanyo Service Manual

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  • 8/6/2019 Sanyo Service Manual



    Chapter One: Overview

    Chapter Two: Port definition

    Chapter Three: External setup item and Automatically identify the item

    Chapter Four: Key definitionChapter Five: Key Function and Operation instructions

    Chapter Six: BUS adjustment and Setup of item

    Chapter Seven: Special function



    . Overview

    This software is apply for SANYO C-MOS 8BIT CPU LC8633XX series, and has ability


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    to control TV of I2C. This software is able to control LA76812 or LA76814, difference

    application is in North America or the South America region. Below is the hardware

    characteristic of this CPU and the brief introduction of the function that software


    1.1. LC8632XX hardware characteristic

    1. 5128 bits RAM

    2. 16K~64K ROM

    3. OSD function

    Screen for display:36 columns16 rows

    Display RAM:3529 bits

    1832 dots:248 fonts character

    8 Character colors,8 Character background colors,8 Full screen colors

    4. minimum bus cycle time of CPU 0.85 s

    5. 16 I/O ports(Input and output can define)

    6. 4-channel8-bit A/D converter

    7. One-channel video signal input port (for CCD use)

    8. 3-channel7-bit PWM output

    9. Port of 3 I2C controls

    10. 16-bit timer/counter

    11. 16-bit timer/PWM

    12. Remote control receiver circuit (take the noise rejection function)

    13. 16-interrupt source,10-interrupt vectored, three level interrupt priority

    14. A maximum of 128 levels subroutine application

    15. CPU Standy function

    16. Oscillation frequency:32.768KHZ(interference as low clock)

    17. +5V5% single power input

    18. High-performance 42pin,S-DIP package

    1.2. The software function

    1. Frequency tune. Can realize America region 181 channel.2. The examination function of EEPROMis realized when the TV set is switched

    on, the alarm is happened if EEPROM has a mistake. If the new EEPROM is replaced,

    then the initialization data is automatically written. The setup item all pass the

    software to realize, the result is stored in EEPROM.

    3. Single Color system of NTSC (LA76814), or three Color systems: PAL/ M, PAL/

    N, NTSC.


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    4. BTSC. The BTSC IC can be used. When the TV is switched on, the TV

    automatically detects whether is the BTSC IC or not.

    5. The MONO or Stereo. When the BTSC IC is used, the stereo is realized,

    otherwise the simple stereo is realized.

    6. Auto fine Search. After switching on the TV set, if all of the position have noprogram, the Auto Search function automatically begin.

    7. Factory mark function. The factory mark is displayed when switching on the

    TV, namely Screen function. The remote control unit can change the contents of

    factory mark.

    8. At switching on the TV, the TV is fixedly placed in the POWER OFF state or not,

    or according to the remembering of pass power.

    9. One to three-channel AV input.

    10. S- VIDEO input, the AV or S- VIDEO status is automatically selected according

    to the S-VIDEO input connect or not.

    11. The CCD function.

    12. The V- CHIP of function.

    13. Child Lock function.

    14. WOOF function, the volume can be controlled. If the WOOF function isnt

    selected, then the WOOF function can be changed for headphones.

    15. Blue screen or blank screen function.

    16. The TV key(program +/ , volume +/ , MENU, TV/ AV, POWER).

    17. Remote controller (Transmitter IC: LC7461M-8103).

    18. Four LANGUAGE MODE (English, French, Spanish, Portuguese).

    19. Full Screen MENU and single line MENU control function.

    20. AUTO Search, MEMORY, AIR/ CABLE function. When the Auto Search have

    completed, the OSD display whether program is searched or not.

    21. AFT function.

    22. DIRECT Program Channel tuning, Program Channel REVIEW function, Program

    Channel UP/DOWN. ( automatically skip the program number of " memory: power


    23. Bright, Contrast, Color, Sharp, Tint, Volume, Treble, Bass, Balance, WOOF

    Volume and WOOF are realized by the IIC BUS, above all value is 100Step, the value

    quickly skip by using the SKIP key.

    24. The single key picture result control (Soft, Standard, Vivid, Bright, Memory

    state, Factory 1 and Factory 2), " Factory 1" and " Factory 2" status is only used

    under the " factory status".


    TIME function.


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    26. Mute function.

    27. Auto Switch off when the TV has no signal over 10 minute. If the blue screen

    function is selected, then the blue screen is displayed when the TV has no the

    signal. The off-time and blue screen function is automatically canceled at " factory

    ," B/W balance, adjust and setup mode.28. Picture background noise control function ON/OFF.

    29. IF automatic adjust box is used, the b/w balance can be automatically

    adjusted at the BUS OPEN mode.

    .Port Definition

    2-1. LC8632XX terminal assignment layouts


    2 50/60 V-MUTE 41

    3 ALARM TV/AV 40

    4 WOOFER VOL AV1 39

    5 VOLUME-L AV2 38

    6 VOLUME-R MUTE 37


    8 DEGAUSS SRS 359 GND IR 34


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    10 XTAL1 NC 33

    11 XTAL2 S-VHS 32

    12 VDD ENABLE 31

    13 KEY1 SCL1 30

    14 AFT IN SDA1 2915 KEY2 SCL0 2816 NC SDA0 27

    17 RESET NC 26

    18 FILT BLANK 25

    19 CVBS-IN B OUT 24

    20 V-SYNC G OUT 23

    21 H-SYNC R OUT 22

    2-2.CPU Terminal description


    Terminal Purpose Function Description

    1 P10/SO0 SENSITIVITY Sensitivity control

    2 P11/S10 50/60 50/60 output3 P12/SCK0 ALARM Clock output

    4 P13/PWM1 WOOFER VOL PWM 1 output5 P14/PWM2 VOLUME-L PWM2 output

    6 P15/PWM3 VOLUME-R PWM3 output7 P16 POWER Power on/off control signal output


    8 P17/PWM DEGAUSS Degauss impulse output

    9 VSS GND ground10 XT1 XTAL1 Input terminal for crystal oscillation

    11 XT2 XTAL2 Output terminal for crystal oscillation12 VDD VDD Positive power supply

    13 P84/AN4 KEY1 Key114 P85/AN5 AFT IN AFT input port

    15 P86/AN6 KEY2 Key216 P87/AN7 NC No use

    17 RESET RESET CPU reset port18 FILT FILT OSD filter

    19 CVIN CVBS-IN Video input20 VS V-SYNC Vertical impulse input


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    21 HS H-SYNC Horizontal

    22 R R OUT Red(R) output terminal of RGB image23 G G OUT Green(G) output terminal of RGB

    image24 B B OUT Blue(B) output terminal of RGB image

    25 BL BLANK OSD image signal

    26 I NC No use27 P60/SDA0 SDA0 IIC data (IC)28 P61/SCLK0 SCL0 IIC clock (IC)

    29 P62/SDA1 SDA1 IIC data (tune)30 P63/SCLK1 SCL1 IIC clock (tune)

    31 P70/INT0 ENABLE Enable port32 P71/INT1 S-VHS S-video examine

    33 P72/INT2 NC No use34 P73/INT3 IR Remote signal input

    35 P00 SRS SRS switch36 P01 WOOF ON/OFF Woof on/off

    37 P02 MUTE Mute38 P03 AV2 Av2

    39 P04 AV1 Av140 P05 TV/AV TV/AV

    41 P06 V-MUTE Mute42 P07 Y/C ON/OFF Y/C ON/OFF

    2-3.Terminal control output status description

    Note: The 0is instead of low level, and 1 is instead of high level as shown below.

    1. Power control

    Port Power on Power off

    Pin7(power) 0 1

    2. AV control

    a). One-channel AV

    Port TV AVPin39(AV1) 0 1

    Pin38(AV2) 0 1

    b). Two-channels AV

    Port TV AV1 AV2


    0 0 1



    0 1 1

    c). Three-channels AV

    Port TV AV1 AV2 AV3



    0 1 0 1

    Pin38(AV2 0 0 1 1


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    3. 50/60 Output

    Port 50 60Pin2(50/60) 0 1

    4. Woof function: The CPU Pin36 is used as the WOOF ON/OFF control, then the

    Pin4 used as the output control of the WOOF volume.

    Port WOOF ON WOOF OFFPin36(WOOFER) 0 1

    5. Left/Right-volume output: When the stereo control IC is not used, or the IC has

    not stereo function, the simple stereo function is automatically realized, at this time

    the CPU pin5 and pin6 are used as the Left /Right-volume output.

    6. Alarm output: When the EEPROM is detected that has a mistake or the ON-

    TIME attention is effective at switching the TV. The CPU pin3 can output the pulse of

    1K. If this signal is mixed with the power, then the sound of the du , du are

    heard .

    7. Y/C control: If the option of COMB.FILTER is set to 1 at "SETUP mode,

    then the Y/C separation control function is selected, the CPU pin42 is used as the

    output of Y/C separation control.


    Pin42 0 1

    8. SRS control function: The CPU pin35 is used as the SRS control function


    Port SRS ON SRS OFFPin35 1 0

    9. Noise rejection function: CPU Pin37 (MUTE) and Pin41(V-MUTE) are used as

    the noise rejection control output.

    a). POWER ON/OFF




    H L H

    b). Besides the POWER ON/ OFF, the MUTE output port is controlled when the internal

    MUTE is effective. The differentiation of Pin37 (MUTE) and Pin41 (V- MUTE) is: the


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    Pin37 (MUTE) can control the MUTE at all circumstance, but the Pin41 (V-MUTE)