HITACHI 32LD8A20 - 37LD8A20 SERVICE MODE AND POWER SUPPLY CIRCUIT

HITACHI 32LD8A20 - 37LD8A20 SERVICE MODE AND POWER SUPPLY CIRCUIT

HITACHI 32LD8A20 -  37LD8A20 

SERVICE MODE AND POWER SUPPLY CIRCUIT 

SERVICE MENU SETTINGS
In order to reach service menu,
First Press “MENU” then press the remote control code, which is “4725”

Picture Mute
If “Yes” selected, “Picture mute” feature is active.
Blue Screen
If “Yes” selected, “Blue Background” item is seen in “Feature” menu.
YC Delay
Tuner PAL <.....> Value between -8 to+7
Ext PAL <.....> Value between -8 to+7
SECAM <.....> Value between -8 to+7

 NTSC <.....> Value between -8 to+7

AGC (dB) <.....> Value between 0 to+8
AudioSetup
Equaliser
If “Yes” selected, “Equaliser” item is seen in “Sound” menu.

BBE
SRS WOW
Virtual Dolby Surround
If “Yes” selected, Virtual Dolby Surround feature is seen in “Sound” menu with selected Virtual Dolby Text.

Virtual Dolby Text The selected item is seen as Virtual Dolby Srround Text.
ƒ 3DS
ƒ Virtual Dolby
ƒ 3D Panorama
AVL
If “Yes” selected, “AVL” item is seen in “Sound” menu.

Carrier Mute
If “Yes” selected, “Carrier mute” feature is active.
Audio Delay Offset
Prescale
ƒ FM Presc. AVL On <.......> Value between 0 to +127
ƒ AM Presc. AVL On <.......> Value between 0 to +127
ƒ NICAM Presc. AVL On <.......> Value between 0 to +127
ƒ I2S Presc. AVL On <.......> Value between 0 to +127
ƒ SCART Presc. AVL On <.......> Value between 0 to +127
ƒ FM Presc. AVL Off <.......> Value between 0 to +127
ƒ AM Presc. AVL Off <.......> Value between 0 to +127
ƒ NICAM Presc. AVL Off <.......> Value between 0 to +127
ƒ I2S Presc. AVL Off <.......> Value between 0 to +127
ƒ SCART Presc. AVL Off <.......> Value between 0 to +127
Dynamic Bass
If “Yes” selected, “Dynamic Bass” item is seen in “Sound” menu.
Subwoofer
If “Yes” selected, “Subwoofer” item is seen in “Sound” menu.

Options 1
VCTP Version
ƒ Basic+
ƒ Basic
Double Digit
If “Yes” selected, “Double Digit” button is active for channel selection.
TEA6415C Available
If “Yes” selected, video switch IC is active on hardware.
TEA642X Available
If “Yes” selected, audio switch IC is active on hardware.
Power-Up Mode
ƒ StandBy If selected, TV opens in stand by mode.
ƒ L.State If selected, TV opens in Last State mode.
TV Open Mode
ƒ Source
ƒ 1st TV
ƒ Last TV

Select Languages

 “Yes” selected languages are seen as option under the “Language” item in “Feature” menu
Language Set 1
German

French
Spanish
Italian
Danish
Finnish
Swedish

Language Set 2
Greek
Norwegian
Dutch
Portuguse
Polish
Turkish
Russian
Czech
Language Set 3
Hungarian
Slovak
Slovenian
Romanian
Bulgarian
Croatian
Serbian
Hebrew

First APS
If “Yes” selected, first time TV opens by asking APS.
APS Volume  

value between 0 to+63
Burn In Mode
If “Yes” selected, TV opens with Burn-In mode. This mode is used in manufacturing.
HDMI WP
If “Yes” selected, HDMI EDID ROM is write protected.
Options 2
Autostore
If “Yes” selected, Channel is automatically stored.
Led Type
ƒ 1 Led 1 Colour
ƒ 1 Led 2 Colours
ƒ 2 Led 2 Colours
PC PIP
PC Stand By

Service Scan/Tuning Setup
Search for L/L’
Pref. Search Standard
ƒ BG, DK, I
ƒ L/L’
ƒ M
Station Ident
ATS Delay Time (ms) Value between 20 to 250
Color Killer Threshold  Value between 0 to +255
Tuner Options
ƒ Control Byte  Value between 0 to +255
ƒ Low-Mid – Low Byte  Value between 0 to +255
ƒ Low-Mid – High Byte  Value between 0 to +255
ƒ Mid-High – Low Byte  Value between 0 to +255
ƒ Mid-High – High Byte  Value between 0 to +255
ƒ BSW1  Value between 0 to +255
ƒ BSW2  Value between 0 to +255
ƒ BSW3  Value between 0 to +255

External Source Settings
DTV
DVD
Ext 2 S-Video
Ext 3
Ext 3 S-Video
FAV
BAV
S-Video
HDMI 1
HDMI 2
YPbPr
PC

Picture Mode
Sources
Tuner
CVBS
RGB
SVHS
HDMI
YPbPr
PC
PIP
Picture Mode
Dynamic

 Natural
Cinema

Colour Temp
 Cool
 Normal
 Warm
Contrast <.......> Value between 0 to +63
Brightness <.......> Value between 0 to +63
Sharpness <.......> Value between 0 to +15
Colour <.......> Value between 0 to +63
Backlight <.......> Value between 0 to +255
R <.......> Value between -63 to +63
G <.......> Value between -63 to +63
B <.......> Value between -63 to +63
Reset TV-Set
Initialise NVM from ROM
Press green button to reset the NVM from RO

POWER SUPPLY CIRCUIT 

CLICK ON THE IMAGE TO ZOOM IN