Service Manual_AK30-J.pdf part of Funai AK30 TV AK30.part01.rar, Schema Elettrico ( Manual Service ) text manual preview

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JVC AK30 / MONO - SERVICE MENU

RELEASE DATE: PREPARED BY:

08.04.2002 BAHADIR ISCAN APPL.ENG.DEP.

ENTERING TO SERVICE MENU: In order to enter service menu, first enter the main menu and then press the digits 4, 7, 2 and 5 respectively. To select adjust parameters, use or buttons. To change the selected parameter, use or buttons. Selected parameter will be highlighted. Entire service menu parameters of AK30 CHASSIS are listed below. For some of parameters the default values are given on the same table. USING COLOUR BUTTONS ON SERVICE MENU: OSD: Select OSD parameter on service menu. Adjust the horizontal position of OSD to the middle of screen, by using the reference bar on bottom of service menu. Min. Value: 000 Max. Value: 127 Recommended Value:082 IF Adjustments: IF1: IF2: IF3: IF4: IF Coarse Adjustment IF Fine Adjustment IF Coarse Adjustment for L-prime IF Fine Adjustment for L-prime 004 065 004 065 RED BUTTON (For Stereo models only): It switches the AVL to ON or OFF mode on service menu. AVL word is visible on service menu when AVL is on. GREEN BUTTON : It switched the PICTURE MODE to 4:3 or 16:9 on service menu. It is useful when it is necessary to adjust 16:9 picture mode vertical size. YELLOW BUTTON : It switches to VERTICAL SCAN DISABLE mode. It is useful to adjust screen voltage. BLUE BUTTON : It is used to adjust AGC and IF automatically on service menu.

IF NEGATIVE ADJUSTMENT (WITHOUT L' SYSTEMS) Set the video pattern to a PAL colour bar pattern with frequency 38.9 MHz. Apply this IF signal to PIN-10 and PIN-11 of tuner. Press PROG-1 and after that BLUE (INSTALL)button from remote controller. Select the standard as BG or I. (if BG is not available) Enter service menu. Select IF1 parameter from service menu and press BLUE (INSTALL) button from remote controller. IF adjustment will be done automatically by
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software. See the IF indicator on service menu, it must be like on FIGURE-1 shown belove. IF POSITIVE ADJUSTMENT (WITH L' SYSTEMS) Set the video pattern to a SECAM-L colour bar pattern with frequency 33.9 MHz. Apply this IF signal to PIN-10 and PIN-11 of tuner. Press PROG-1 and after that BLUE (INSTALL)button from remote controller. Select the BAND VHF-1 (S1 S4 for PLL tuners) and standard as L'. Enter service menu. Select IF1 parameter from service menu and press BLUE (INSTALL) button from remote controller. IF adjustment will be done automatically by software. See the IF indicator on service menu, it must be like on FIGURE-1 shown below. AGC: Automatic Gain Control In order to do AGC adjustment, enter a 60µdBV RF signal level from channel C-12 (224.25 MHz) Select AGC parameter from service menu. Press BLUE (INSTALL) button from remote controller. The adjustment will be done automatically by software. See the AGC indicator on service menu, it must be 1. Check that picture is normal at 90dBµV signal level.

:

1

1

IF INDICATOR
FIGURE-1

AGC INDICATOR

NONE

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SCREEN ADJUSTMENT: (FBT Screen)

SCREEN ADJ.POT.

Enter service menu by pressing "MENU" and "4, 7, 2, 5" from remote controller. Then press yellow button to disable vertical scan. Adjust screen via screen pot. For a thin horizontal line. Press yellow button again to enable vertical scan. Press "TV" button to leave service menu. VLIN: Vertical Linearity Enter a PAL B/G circle test pattern via RF. Change VLIN till you see circle as round as possible. Min. Value: 000 Max. Value: 063 Recommended Value:045

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VS1A: Vertical Size for 50 Hz / 4:3 Enter a PAL B/G circle test pattern via RF. Change VS1A (Vertical Size) until horizontal black lines on both the upper and lower part of the test pattern become very close to the upper and lower horizontal sides of picture tube and nearly about to disappear. Check and readjust Vertical Size item if the adjustment becomes improper after some other geometric adjustments are done. Min. Value: 000 Max. Value: 063 Recommended Value:030 VS1B: Vertical Size for 50 Hz / 16:9 Enter a PAL B/G circle test pattern via RF. Enter service menu and press GREEN (PICTURE) button from remote controller to switch to 16:9 picture mode on service menu. Change VS1B (Vertical Size) till the picture becomes 16:9 format. Check and readjust Vertical Size item if the adjustment becomes improper after some other geometric adjustments are done. Min. Value: 000 Max. Value: 063 Recommended Value:056 VP1: Vertical Position for 50 Hz Enter a PAL B/G circle test pattern via RF. Change Vertical Position till the test pattern is vertically centered. Horizontal line at the center pattern is in equal distance both to upper and lower side of the picture tube. Check and readjust Vertical Position item if the adjustment becomes improper after some other geometric adjustments are done. Min. Value: 000 Max. Value: 015 Recommended Value:010 HP1: Horizontal Position for 50 Hz Enter a PAL B/G circle test pattern via RF. Change Horizontal Position until the picture is horizontally centered. Check and readjust Horizontal Position item if the adjustment becomes improper after some other geometric adjustments are done. Min. Value: 000 Max. Value: 063 Recommended Value:035
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VS2A: Vertical Size for 60 Hz / 4:3 Enter an NTSC-M circle test pattern via RF or video inputs. Change Vertical Size until the checkered parts of test pattern on both of upper and lower side disappear. Check and readjust Vertical Size item if the adjustment becomes improper after some other geometric adjustments are done. Min. Value: 000 Max. Value: 063 Recommended Value:013 VS2B: Vertical Size for 60 Hz / 16:9 Enter an NTSC-M circle test pattern via RF or video inputs. Enter service menu and press GREEN (PICTURE) button from remote controller to switch to 16:9 picture mode on service menu. Change Vertical Size until the picture becomes 16:9 format. Check and readjust Vertical Size item if the adjustment becomes improper after some other geometric adjustments are done. Min. Value: 000 Max. Value: 063 Recommended Value:038 VP2: Vertical Position for 60 Hz Enter an NTSC-M circle test pattern via RF or video inputs. Change Vertical Position till the test pattern is vertically centered. Horizontal line at the center pattern is in equal distance both to upper and lower side of the picture tube. Check and readjust Vertical Position item if the adjustment becomes improper after some other geometric adjustments are done. Min. Value: 000 Max. Value: 015 Recommended Value:012 HP2: Horizontal Position for 60 Hz Enter an NTSC-M circle test pattern via RF or video inputs. Change Horizontal Position till the picture is horizontally centered. Check and readjust Vertical Size item if the adjustment becomes improper after some other geometric adjustments are done. Min. Value: 000 Max. Value: 063 Recommended Value:030
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RGBH: RGB Mode Horizontal Shift Offset Enter a RGB circle test pattern via video inputs. Force the TV to RGB mode by pressing AV button from remote controller. Change RGB Horizontal Position till the picture is horizontally centered. Check and readjust RGBH item if the adjustment becomes improper after some other geometric adjustments are done.

Min. Value: 000 Max. Value: 063 Recommended Value:007

4:3 50Hz GEOMETRY ADJ.

4:3 60Hz GEOMETRY ADJ.

16:9 50Hz GEOMETRY ADJ.

16:9 60Hz GEOMETRY ADJ.

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WHITE BALANCE ADJUSTMENT The following three parameters are used to make white balance adjustment. To do this, use a Colour Analyzer. Using WR (White point adjust for RED), WG (White point adjust for GREEN), WB (White point adjust for BLUE) parameters, insert the + sign in the square which is in the middle of the screen. WR: White Point Adjustment for RED Use this parameter to set the strength of RED in White. Min. Value: Max. Value: JVC Default: 000 063 040

WG: White Point Adjustment for GREEN Use this parameter to set the strength of GREEN in White. Min. Value: Max. Value: JVC Default: 000 063 040

WB: White Point Adjustment for BLUE Use this parameter to set the strength of BLUE in White. Min. Value: Max. Value: JVC Default: BR: Bias for RED Use this parameter to set the strength of RED in BLACK. Min. Value: Max. Value: 000 063 000 063 040

JVC AV20&21BJ8: 030 JVC AV14BJ&BM8: 024

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BG: Bias for GREEN Use this parameter to set the strength of GREEN in BLACK. Min. Value: 000

JVC AV20&21BJ8: 031 JVC AV14BJ&BM8: 035 APR: Automatic RGB Peak Regulation (APR) Threshold The goal of the APR function (Automatic RGB peak regulation) is to compensate the spread of contrast between sources or programs by regulating the peak amplitude of RGB signals. This results in a picture with higher contrast whatever the input signal amplitude. Besides, APR increases the contrasts of pictures with low contrast and avoids the clipping at RGB output for pictures with high amplitude. To enable APR, refer to OP3 in Option Bytes. Min. Value: Max. Value: JVC Default: 000 015 010

The following default values are the factory settings of the corresponding items. Except Volume, all values are restored when STANDARD button is pushed during no menu is displayed. Volume is set to its default value only if the A.P.S. bit is set when the TV is turned on. BRI: Brightness JVC AV20&21BJ8: 037 JVC AV14BJ&BM8: 035 CON: Contrast JVC AV20&21BJ8: 035 JVC AV14BJ&BM8: 050

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COL: Colour JVC AV20&21BJ8: 043 JVC AV14BJ&BM8: 047 SHA: Sharpness JVC AV20&21BJ8: 06 JVC AV14BJ&BM8: 08 HUE: Hue Default Value: 31 VOL: Volume Default Value: 15 WR-R: White Point Adjustment for RED (RGB Mode) Use this parameter to set the strength of RED in White for a RGB Pattern. Default Value: Not determined by JVC yet. WG-R: White Point Adjustment for GREEN (RGB Mode) Use this parameter to set the strength of GREEN in White for a RGB Pattern. Default Value: Not determined by JVC yet. WB-R: White Point Adjustment for BLUE (RGB Mode) Use this parameter to set the strength of BLUE in White for a RGB Pattern. Default Value: Not determined by JVC yet. FMP1: FM Prescaler when AVL is OFF (STEREO ONLY) Min. Value: 000 Max. Value: 127 Recommended Value:009 NIP1: NICAM Prescaler when AVL is OFF (STEREO ONLY)
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Min. Value: 000 Max. Value: 127 Recommended Value:020 SCP1: SCART Prescaler when AVL is OFF (STEREO ONLY) Min. Value: 000 Max. Value: 127 Recommended Value:013 FMP2: FM Prescaler when AVL is ON (STEREO ONLY) Min. Value: 000 Max. Value: 127 Recommended Value:013 NIP2: FM Prescaler when AVL is ON (STEREO ONLY) Min. Value: 000 Max. Value: 127 Recommended Value:016 SCP2: FM Prescaler when AVL is ON (STEREO ONLY) Min. Value: 000 Max. Value: 127 Recommended Value:013 Tuner Settings: In the following table, the parameters for tuner settings and the setting values of Thomson CTF 5510 are given.
Parameter Explanation Thomson CTF5510

F1H F1L F2H F2L BS1 BS2 BS3 CB

High byte of VHF1-VHF3 cross-over frequency Low byte of VHF1-VHF3 cross-over frequency High byte of VHF3-UHF cross-over frequency Low byte of VHF3-UHF cross-over frequency Band switching byte for VHF1 Band switching byte for VHF3 Band switching byte for UHF Control byte

0000 1001 1001 0010 0001 1011 1000 0010 0000 0011 0000 0110 1000 0101 1000 1110

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Option Bytes: OP1: Peripheral Options b7: b6: NOT USED 1, Display "AV-3" as "F-AV" 0, Display "AV-3" as "B-AV" 1, Turn back TV mode after the last AV (with AV key) 0, Turn back first AV mode after the last AV 1, AV-1 S is available in AV key stream 0, AV-1 S is NOT available in AV key stream 1, RGB is available in AV key stream 0, RGB is NOT available in AV key stream 1, AV-3 is available in AV key stream 0, AV-3 is NOT available in AV key stream 1, AV-2 is available in AV key stream 0, AV-2 is NOT available in AV key stream 1, AV-1 is available in AV key stream 0, AV-1 is NOT available in AV key stream

b5:

b4:

b3:

b2:

b1:

b0:

OP2: Reception Standard Options b7: 1, 3-button keyboard (V-, P+, V+) 0, 4/5 button keyboard (V-, V+, P-, P+, Menu) 1, L/L' is available 0, L/L' is not available 1, I is available 0, I is not available 1, DK is available 0, DK is not available 1, BG is available 0, BG is not available 1, 3D PANORAMA is visible (STEREO ONLY) 0, DOLBY VIRTUAL is visible

b6:

b5:

b4:

b3:

b2:

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b1: b0:

NOT USED 1, LOW POWER is available 0, LOW POWER is not available

When LOW POWER is available, low power consumption is provided during Stand-by. OP3: Video Options b7-6: Xtal Configuration 00, 1 Xtal PAL 4.43 01, 2 Xtal PAL/NTSC 4.43/3.58 10, 1 Xtal PAL/SEC/NTSC 4.43 11, 2 Xtal PAL/SEC/NTSC 4.43/3.58 b5: 1, Enable Blue back when no signal in AV modes 0, No blue back in AV modes 1, White Insertion is ON 0, White Insertion is OFF

b4:

White Insertion permits video IC to force a white picture during soft stop to discharge the tube at switching off. It prevents white flaming while switching off the TV. b3: 1, Blue Background when no signal 0, Disable Blue Background 1, Semi-transparent background for menu 0, Solid Menu background for menu 1, Black Stretch is ON 0, Black Stretch is OFF

b2:

b1:

The Black Stretch function is used to increase the contrast for darker signals (lower than 50 IRE) when the overall picture is bright, and thus improve the display of the picture details. The amplitude of the stretch depends on the average picture content. b0: 1, APR is ON 0, APR is OFF

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OP4: TV Features b7: b6: b5: NOT USED NOT USED 1, AK36 chassis 0, AK30 chassis 1, Hotel Mode can be activated 0, Hotel Mode cannot be activated 1, No Signal Timer is enabled 0, No Signal Timer is disabled For PLL Tuner 1, Frequency based search 0, Channel table based search (No meaning for VST Tuner) NOT USED 1, Extra 200 msec blanking for VST 0, no-extra blanking

b4:

b3:

b2:

b1: b0:

Extra 200-msec blanking is needed for VST tuners in order to prevent the colordelaying problem in SECAM. OP5: Channel Tables b7: 1, Extra 150 msec blanking more for VST (if OP4.b0 = 1, to SECAM color problem) 0, no-extra blanking NOT USED 1, Force both channel on even no carrier ( carrier mute disable ) (for STEREO models) 0, Default value after reset NOT USED NOT USED NOT USED NOT USED

b6: b5:

b4: b3: b2: b1:

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TX1: Teletext Options b7: 1, Auto APS after Stand-By 0, no APS after Stand-By

In shipping condition, APS bit is set to1 and after the TV is turned on for the first time, it's automatically set to 0. b6: b5: RESERVED (must be 0) 1, Frequency item is VISIBLE in Install Menu and APS Menu 0, Frequency item is INVISIBLE in Install Menu and APS Menu

b4-3: Chassis Code 00, EP version 01, EE version 10, EN version 11, EJ version Chassis Code is used when no country is selected in A.P.S menu, so the software automatically selects the sound standard depending on the chassis code. b2-1-0: Device type selection 000, EPROM M6 A 001, ROM H5 P 010, ROMLESS H5 P 011, EPROM M6 R 100, ROM M6 R 101, OSDEPROM M6 R OTP 110, ROM M6 P MASK P SERIES 111, Read Auto Gain Table for the device from EEPROM MASK O SERIES

The default values of the option bytes are given in the following table:
EN Version EP Version EE Version

OP1 0111 0101 0111 0101 0111 0101 OP2 0000 1001 0100 1001 0001 1001 OP3 0110 0111 1110 0111 1110 0111 OP4 0000 1001 (AV20&21BJ8) 0000 1001 (AV20&21BJ8) 0000 1001 (AV20&21BJ8) 0010 1001 (AV14BJ&BM8) 0010 1001 (AV14BJ&BM8) 0010 1001 (AV14BJ&BM8) OP5 1000 0000 1000 0000 1000 0000 TX1 (1)001 0(101) (1)000 0(101) (1)000 1(101)
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