Crown SANYO IIC Schematic

SERVICE MANUAL

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SANYO IIC CHASSIS

PAL/SECAM/NTSC(AV) COLOR TV RECEIVER

For user's safety (to meet the safety requirements o some countries), the receiver should be kept in its initial status. Only same spare parts can be replaced with.

Contents Page

 Specifications………………………………………………………………………  Remarks……………………………………………………………………………  Description of new circuit …………………………………………………………  Maintenance adjustment……………………………………………………………  Trouble shooting……………………………………………………………………  Chassis circuit diagram ……………………………………………………………  Block diagram………………………………………………………………………  Replaceable parts list ………………………………………………………………

WARNING

Some parts of the receiver are charged. Separate transformer must be used between the mains plug and the

socket when repairing the chassis.

To prevent electric shock, do not remove the outer cover. No user serviceable parts inside. Please refer

servicing to qualified service personnel.

SPECIFICATIONS

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Aerial impedance ………………………………………………………75Ωunbalanced Convergence……………………………………………………………Auto focus system Focus……………………………………………………………………Double high level static focus Rated audio output frequency …………………………………………Max 3W×2 Picture carrier frequency ………………………………………………38MHZ Sound carrier frequency ………………………………………………31.5MHZ Power supply …………………………………………………………AC 135~240V 60HZ/50HZ Power consumption……………………………………………………75W Loudspeaker ……………………………………………………………Round loudspeaker scanning deflection ……………………………………………………Magnetic deflection Tuning range……………………………………………………………

REMARKS

Please refer maintenance and servicing to qualified service personnel.

High voltage system and picture tube

When repairing high voltage system, an insulation line (such as a probe) must be connected to a 10Ωresistant in series between the metallic part(ground ) and the second stage o the picture tube to eliminate the static electricity of the high voltage system.The AC mains plug must be separated from the AC power supply.

1The picture tube of the receiver adapts integrated inner anti-explosion. 2For safety continuity, only tube of the same model can be used for replacement. 3Do not lift the tube by its neck. 4The picture tube can't be dealt with until the anti-shock screen is worn and the high voltage system is discharged thoroughly.

X-ray

This receiver is designed to keep the X radiation to absolute minimum. Yet malfunction o servicing might cause the danger of exposing sealed areas to excessive radiation. Therefore the precautions below must be followed: 1During servicing, never let the high voltage of the receiver exceed 28KVI=0uA 2The high voltage must be kept at 25.5KV±1.5KVI=1000 uAso that the receiver can operate normally. The receiver has been set to the said high voltage before leaving the factory.  After servicing, high voltage fluctuation may occur. Be sure to examine whether the high voltage fluctuates or not after servicing. 3Do not replace with unauthorized picture tube in case of excessive X radiation.

Before return

Before returning the receiver to its user, please go through the following safety examinations: 1Check all the insulation of the wires between the chassis and the other metallic parts of the receiver. Make sure that no insulation damage or short contact occurs.

2Check all the protection devices, such as non-metallic control buttons, tuners on the rea

cover ; etc.

Description of new circuit

1. Definitions of Ports

11 LC863328A-5W63 pins diagram

1 UHF (VLF) BAND1 42 2 50/60 (VHF) BAND2 41 3 ALARM LNA 40 4 WOOFER VOL AV1 39 5 VOLUME-L AV2 38 6 VOLUME-R MUTE 37 7 POWER WOOF ON/OFF 36 8 VT SIF 35 9 GND IR 34 10 XTAL1 SD 33 11 XTAL2 S-VHS 32 12 VDD ENABLE 31 13 KEY IN SCL1 30 14 AFT IN SDA1 29 15 NC SCL0 28 16 AC DETECT SDA0 27 17 RESET NC 26 18 FILT BLANK 25 19 CHROMA B OUT 24 20 V-SYNC G OUT 23 21 H-SYNC R OUT 22

12 CPU ports description

pin Port usage Function description

1 P10/SO0 UHF Select UHF (BAND OPTION select "2" or "3") 2 P11/SI0 50/60 Horizontal frequency 50/60 output 3 P12/SCK0 ALARM Alarm signal output 4 P13/PWM1 WOOFER VOL Woofer volume PWM output 5 P14/PWM2 VOLUME-L Volume-L PWM output port 6 P15/PWM3 VOLUME-R Volume-R PWM output port 7 P16 POWER POWER ON/OFF signal output control port 8 P17/PWM VT Tuning-use 14bit PWM output port 9 VSS GND Ground 10 XT1 XTAL1 CPU use crystal oscillation port 11 XT2 XTAL2 CPU use crystal oscillation port 12 VDD VDD Power supply (+5V) 13 P84/AN4 KEY IN Key in port 14 P85/AN5 AFT IN AFT signal input port 15 P86/AN6 NC Not connected 16 P87/AN7 NC Not connected 17 RESET RESET CPU reset port 18 FILT FILT OSD filtering 19 P83/AN3 CHROMA SECAM chroma detection 20 VS V-SYNC Vertical pulse input 21 HS H-SYNC Horizontal pulse input 22 R R OUT OSD red signal output 23 G G OUT OSD green signal output 24 B B OUT OSD blue signal output 25 BL BLANK OSD blanking signal output 26 I NC Not used 27 P60/SDA0 SDA0 IIC data(EEPROM use) 28 P61/SCLK0 SCL0 IIC clock(EEPROM use) 29 P62/SDA1 SDA1 IIC data( other IC use) 30 P63/SCLK1 SCL1 IIC clock (other IC use) 31 P70/INT0 ENABLE Automatic adjustment enabling port 32 P71/INT1 S-VHS S-VIDEO detection 33 P72/INT2 SD SD input port 34 P73/INT3 IR Remote control signal input 35 P00 SIF 4.5M sound absorption selection 36 P01 WOOF ON/OFF Woofer on/off 37 P02 MUTE MUTE control 38 P03 AV2 AV option control port 2 39 P04 AV1 AV option control port 1 40 P05 LNA Sensitivity control port 41 P06 BAND2(VHF) Band option 42 P07 BAND1(VLF) Band option

1-3.Description of port-controlled output modes notein the tables below, "0" refers to low level"1" refers to high

level. 1-3-1.Power switch control

Port POWER ON POWER OFF Pin7(POWER) 0 1

1-3-2. Band control

BAND

OPTION=0

Port V-L V-H UHF V-L V-H UHF V-L V-H UHF V-L V-H UHF

Pin42(BAND1) 0 1 1 0 1 1 1 0 0 0 1 1 Pin41(BAND2) 0 0 1 1 0 1 0 1 0 1 0 1 Pin1(UHF) x x x x x x 0 0 1 1 1 0

BAND OPTION=1

BAND OPTION=2 BAND

OPTION=3

BAND OPTION LA7910 TUNER PORT/H POTR/L Port V-L V-H UHF V-L V-H UHF V-L V-H UHF V-L V-H UHF

Pin42(BAND1) 0 1 1 0 1 1 1 0 0 0 1 1 Pin41(BAND2) 0 0 1 1 0 1 0 1 0 1 0 1 Pin1(UHF) x x x x x x 0 0 1 1 1 0

1-3-3. AV control

a). One-way AV

b). Two-way AV

PORT TV AV1 AV2 Pin39(AV1) 0 0 1 Pin38(AV2) 0 1 1

c). Three-way AV

PORT TV AV1 AV2 AV3 Pin39(AV1) 0 1 0 1 Pin38(AV2) 0 0 1 1

PORT TV AV Pin39(AV1) 0 1 Pin38(AV2) 0 1

1-3-4. 50/60 output

PORT 50 60 Pin2(50/60) 0 1

1-3-5. Woofer functionwhen stereo control TA1216AN IC is employedTA1216AN

is provided with woofer control function. If TA1216AN is not used, CPU will reserve a woofer port to enable woofer control function. Pin36 is used as on/off control, and Pin4 as woofer volume control output.

PORT WOOFER ON WOOFER OFF Pin36(WOOFER) 0 1

1-3-6. L/R volumewhen stereo control IC is not used, simple stereo function can be selected. Then Pin5 and Pin6 of the CPU can be used as L/R volume output control.

1-3-7. Sensitive receiving output control: in "SETUP" mode, if "SENSITIVITY" is set to "1", then the function of controlling sensitive receiving tuner is selected, Pin40 is used as control output.

PORT SENSITIVITY(YUV) ON SENSITIVITY(YUV) OFF

Pin40 1 0

1-3-8. Mute control

a). POWER ON/OFF: POWER OFF POWER ON POWER OFF POWER OUT: H L H

MUTE OUT: H L H

b). Besides, MUTE pin also operates when CPU is in automatic mute status or

when the MUTE button on remote control unit is pressed to make CPU operate in mute status.

2. Automatic identification

2-1. Maximum channels to be stored

CPU can automatically determine the maximum channels to be stored according to the capacity of external EEPROM connected.

EEPROM model AT24C02 AT24C04 AT24C08

Channel max 55 140 255

3. Definitions of Local Buttons

3-1. Definitions of buttons (AD input port)

PORT VOLTAGE RANGE BUTTON FUNCTION DESCRIPTION

AN4 0V~3/32VDD OFF No status when button pressed

KEY IN 4/32VDD~7/32VDD AUTO Full-auto search

8/32VDD~11/32VDD TV/AV TV/AV switch 12/32VDD~15/32VDD MENU Menu button 16/32VDD~19/32VDD VOL+ Volume + 20/32VDD~23/32VDD VOL- Volume 24/32VDD~27/32VDD POS+ Program + 28/32VDD~VDD POS- Program -

noteif a local button and a remote control button are pressed simultaneously, the

local button is prior to remote control button.

3-2. Definitions of user's remote control buttons

Button English name Chinese name Function description Remark

0 0 0

Channels selected directly by

figure button

9 9 9

10

11 TV/AV TV/AV TV/AV switch 12 GAME 13 14 MENU 15 WOOF 16 VOL+ + Volume + 17 PROD 18 POWER 19 POS+ + Program + 20 VOL- - Volume - 21 JUMP Analogue jump (jump button in FACTORY mode) 22 MUTE 23 POS- - Program - 24 SLEEP / 25 PP / Picture mode selection 26 RECALL / 27 DISPLAY / 28 PICTURE / Picture menu 29 AUDIO / Audio menu 30 CLOCK / Clock menu/jump to yellow fast

31 SYSTEM / System menu / jump to cyan fast

 





 



 

Direct selection by double or triple digit numbers

GAME control

Control menu switch Woofer switch control

Factory mode Factory use only Power on/off

Mute

Sleep

Program recall Display

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3-3User's remote control unit wiring

VCC N1

PIN1 PIN4PIN2 PIN3

LC7461M-8103

1 C3 24 2 C2 23 3 C1 22 VCC 4 C0 21 5 C4 20 6 C5 19 7 18 VCC 8 17 9 16

10 15 11 14 G1 12 13

C1 C2

PIN20

PIN19

PIN18

PIN17

PIN16

PIN15

8

GAME

VOL-

9

PROD POWER VOL+

JUMP

-/--/---

MUTE

3 1 2 0

7 5 6 4

TV/AV

WOOF MENU

POS+

POS-

C3 VD1

R1 R2 V1

PIN14

PIN13

SLEEP

PICTURE

P.P

AUDIO OPTION

RECALL

1. N1 LC7461M-8103 2. VD1 IR-LED

3. V1 2SC1815 4. R1 RT14-1/4W-1Ω-J

DISPLAY

SYSTEM

5. R2 RT14-1/4W-220Ω-J 6. C1 C2 CT1-05B-2B4-63V-220PF-K

7. C3CD110X-6.3V-100UF-M

8. G1 455KHZ 9.VCC 2 AA size batteries User's code: C5 C4 C3 C2 C1 C0

0 1 1 1 0 0

4. Button Functions and Operation Instructions

41 POWER (remote control button)

1) Functionpower on/off control

2) Description

Each press of the (POWER) button makes a switch between POWER ON and

OFF.

After power is turned on, CPU will read the data in EEPROM. CPU will

determine the POWER status according to the selection of "POWER OPT"if "0" is selectedthen the POWER is always in POWER OFF status after turn-onif "1" is selected, then the POWER status will be determined according to the memory before turn-off.

In POWER OFF mode, only POWER button works. The other buttons do not

work. But the local POS+ and POS- buttons can be used to turn on the TV

set instead of POWER button. SLEEP and TIME-OFF settings will be cancelled when "POWER OFF" is set. If SCREEN OPT is set, then screen function is enabled during POWER

ON/OFF.

3) Output control Please refer to description"1" in "2-3" section.

4) OSD display (about 10 seconds)

12 AUTO D/K

42 TV/AV remote control button, local button

1) FunctionAV-TV switch.

2) Description Each press of this button makes one switch between TV and AV. Auto mute and black background functions are enabled during the switch. In AV modenumeric buttons (09), (- -), POS and POS buttons do not

work, only "AV" display appears.

If the last AV is switched to, and when S-VIDEO INPUT is detected by CPU,

the S-VIDEO control will be enabled automatically, and OSD display will also be replaced by S-VIDEO display.

3) Output control

Please refer to description "1" in "2-3" section.

4) OSD displayabout 5 seconds

12 AV AUTO AUTO D/K

press TV/AV button

43. 09,remote control buttons

1) Functions select position directly.

2) Description

Press numeric buttons (0~9) to select programs in 0~9 positions directly. Press

---button to enter into two-digit or three-digit figure mode before selecting programs in 10~254 positions (max programs is determined by the capacity of EEPROM), then press (0~9) to key in figures in the order of hundred's,

ten's and unit's place to select programs directly. The button does not work if the number is beyond the position max. Auto mute and black background function are enabled during position switch. When position selection is finished the current position and the last position will

change accordingly. The result will be written in EEPROM. If the position selected is the same as the current position, CPU will re- read the

EEPROM about the information related to the current position. In PRESET menupress (0~9) and(--) buttons to select directly the position to be

readjusted. In CLOCK menu, press (0~9) and (--) buttons to preset program positions

directly.

In CHANNEL menupress (0~9) and (--) buttons to select the positions to be

copied. In AV modepress (09) or (- -) buttons do not work, but AV display will appear. During B/W balance adjustment in one light line mode, press numeric buttons

(0~7) can adjust sub-brightness, red bias, green bias and blue bias. "8", "9"

and "--" buttons do not work.

3) OSD displayabout 5 seconds

2 2 AUTO D/K

notewaiting for the unit's digit

44. POS , POS/+, -remote control, local buttons

1) Function move program position upward or downward by 1select options in a menu select adjusting optionsplay games.

2) Description

Press POS/POSto change program positions. Automatically skip off the

position of "REMEMBER OFF".

Press and hold this button for more than 1second, the position will increase or

decrease by 1 for each 800ms.

If all program positions are in "MEMORY OFF " status, then press POS and

POS buttons can only select the program in "0" position. If only one position is in MEMORY ON" status, then press POSPOS buttons can select the only program in the position of "MEMORY ON".

After reaching the maximum position stored, press the POS button again will

return to the minimum position stored After reaching the minimum position stored, press the POS button again will return to the maximum position stored.

After switch is finished, the information of the current position and the last

position will change. The result will be stored in EEPROM automatically. Auto mute and black background functions are enabled during program switch. In full-screen menu, POSand POS buttons are used to select from top to

down the options in the menu (please refer to the operation instruction in

relevant menu. In "B/W ADJUST", "ADJUST" and "SETUP" modePOS+ and POS- buttons

are used to turn page up and down. In AV mode, press POS or POS button doesn't workbut "AV" display

will appear. While checking perpetual calendar, press POS+ and POS- buttons to change

year. In "Tetris" game, press POS+ button to rotate, press POS- to quicken fall. This

two buttons do not work in other games.

3) OSD displayabout 5 seconds

10 POS 11

AUTO AUTO D/K D/K

POS

45 RECALL remote control button

1) FunctionTo recall the last program; play games .

2) Description: When switch is finished, the information of the current position and the last position will change and the result will be stored in EEPROM automatically.

In"888" and "Car racing " games, this button is used to play games, while in

"Tetris" game, this button is used to pause the game.

3) OSD displaysame as position OSD display

46. DISPLAYremote control button

1) FunctionProgram position displayincluding AV mode; to quit game.

2) Description

Press this buttonOSD will display program position, color system, sound

system, and will display position only in small characters after 5 seconds. In AV mode, OSD will not display sound system .

In "B/W BALANCE" modethis button does not work during adjusting options

display; while in other OSD status, press this button will return to the adjusting options OSD.