Tuesday, March 03, 2015

HITACHI 51F510 - 57F510 SERVICE MODE AND POWER SUPPLY CIRCUIT

HITACHI 51F510  - 57F510

 RP TV



 SERVICE MODE AND POWER SUPPLY CIRCUIT 

Service Menu Access
Adjustment Procedure
(1) Press and hold INPUT key on Control Panel and then press POWER key on control panel to access I2C adjustment mode.
(2) Receive signal on main picture. (NTSC, SDTV or HDTV). Some menu pages have I2C adjustments for SDTV and HDTV. The set will automatically allow you to set these items only when a SDTV or HDTV signal is input to the COMPONENT jacks on the back of the TV.
(3) Check the OSD according to table on pages 53-71, using CURSOR UP,DOWN  on Remote Control.
*: Adjustable Data
Others: Fixed Data (be careful not to change)
(4) Press EXIT key to exit I2C ADJUST mode.
INITIALIZING THE TV
 (1) If the TV I 2C data is different from the I 2C Parameter (of the following pages) for fixed data, change the data.
(2) When exchanging microprocessor or EEPROM and TV is turned on for first time, it requires initialization of Memory Initial of I2C adjustment menu. Press RIGHT  CURSOR  and hold for 3 seconds to initialize memory.
(3) Use FACTORY RESET to set TV to out of factory shipping conditions: Do not use MEMORY INITIALIZE.
Video Settings (Advanced Settings) Check
 Color Temperature Control Check

Adjustment preparation
(1) Receive the white raster signal.
(2) Set the video controls to normal conditions. Adjustment procedure
(1) Select the Video mode using the UP AND DOWN CURSOR buttons and press Select button.
(2) Select Color Temperature option using the UP AND DOWN CURSOR buttons and press Select button.
(3) Select MEDIUM using RIGHT AND LEFT  CURSOR buttons and Picture will turn reddish slightly.
(4) Select STANDARD using RIGHT AND LEFT  CURSOR buttons and Picture will turn more reddish.
(5) Select Black & White using RIGHT AND LEFT  CURSOR buttons and Picture will turn more and more reddish.
(6) Select HIGH using RIGHT AND LEFT  CURSOR buttons and Picture will turn bluish.
High Voltage Adjustment (should NOT be
readjusted in field).

Adjustment preparation
(1) Connect High Voltage meter to FBT High Voltage output. Connect GND of High Voltage meter to CPT GND or FBT GND.
(2) Check that High Voltage adjustment VR (RH17) is set to mechanical center. (located behind FBT on DEFLECTION PWB).
(3) Receive circle pattern signal.
(4) VIDEO control should be reset.
Adjustment procedure
(1) Adjust High Voltage to following spec. by turning VR RH17 slowly. ADJ. SPEC = 31.7KV±0.2kV.
(2) After adjustment, fix VR RH17 with Silicone glue (KE40RTV).
DCU Phase Data Setting
Adjustment preparation
(1) Cut off adjustment should be finished.
(2) Set video conditions to factory preset.
(3) R/C must be in DCAM mode (see page 46).
Adjustment procedure
(1) Receive any NTSC signal.
(2) Push “SERVICE ONLY” SW on DEF./CONV. PWB. (Enter to DCU ADJ. mode).
(3) Press [>>] key on R/C. (Green cross hatch is displayed). Then push EXIT key on R/C. (Character pattern is displayed. This is the PHASE setting mode).
(4) Set PH-H phase data as shown below by using
[4] and [6] key on R/C.
(5) Set PH-V phase data as shown below by using
[2] and [5] key on R/C.
(6) Set CR-H phase data as shown below by using CURSOR PAD  LEFT and  RIGHT key on R/C.
(7) Set CR-V phase data as shown below by using CURSOR PAD UP AND DOWN key on R/C.
(8) Push [>>] key on R/C to exit from the PHASE mode.
(9) Press Aspect key 2 times on R/C to write the phase data to memory.
(10) When Green dots are displayed, push [MUTE] key to return to DCU ADJ. mode.
(11)Push “SERVICE ONLY” SW to return to RF or VIDEO mode.
Beam alignment
Adjustment preparation
(1) Adjust at least 30 minutes after the unit on.
(2) Raster tilt should be completed. Raster position, horizontal and vertical size, and optical focus adjustment should be coarse adjusted.
(3) Set video conditions to factory preset.\
(4) Receive cross-hatch signal.
Adjustment procedure
(1) Green (G) tube beam alignment adjustment. Short-circuit TS (2p EH) subminiature connector plug pins of Red (R) and Blue (B) on the CPT boards and project only Green (G) light or you may cover the R and B lens.
(2) Put Green (G) tube beam alignment magnet to the cancel state.
(3) Turn the Green (G) electrical focus (Focus Pack) counterclockwise all the way and make sure of position of cross-hatch center on screen. (Halo state.)
(4) Turn the Green (G) electrical focus (Focus Pack) clockwise all the way. (Blooming state.)
(5) Turn two magnets forming alignment magnet in any desired direction and move cross-hatch center to position found in (3).
(6) If image position does not shift when Green (G) static focus (Focus Pack) is turned. Green (G) beam alignment has been completed.
(7) If image position shifts when Green (G) static focus (Focus Pack) is turned, repeat (2)-(6).
(8) Conduct beam alignment for red (R) and Blue (B) focus: Focus Pack UFPK.
(9) Upon completion of adjustment, fix beam alignment magnets with white paint.
LENS FOCUS ADJUSTMENT
Adjustment preparation
(1) The orientation of PTV set is arbitrary, west, east, north and south.
(2) Centering DY inclination should have been adjusted.
(3) Static focus adjustment should have been coarse adjusted.
(4) Drive VR location adjustment should have been completed. (Red : 12 O’clock, Green : 1~2 O’clock).
(5) Receive the cross-hatch pattern signal.
(6) Refer to setup below. CONTRAST : HALF of full scale. BRIGHTNESS : minimum.
Adjustment procedure
(1) Loosen the fixing screw or wing nut on the lens cylinder so that the lens cylinder can be turned. (Be careful not to loosen too much). After
completing steps (4), (5), (6) below, tighten the fixing screws or wing nuts for each lens with a torque of 1.18N.m (12Kgf cm) ~ 1.67N.m (17Kgf cm).
(Be careful the lens cylinder does not turn after having tightened the screw or wing nuts. If it is tightened too much, lens may tilt or screw may break.)
(2) Apply covers to each color of R, G and B lenses. And project a single color on the screen and adjust in sequence. (The adjustment order of G,
R and B is only an example.)
(3) If the lens adjustment knob is turned clockwise viewed from the front, the color Aberration change as follows.

(4) In case of G lens. Set to the point where the chromatic aberration switches from blue to red. If the chromatic aberration appearing all over the screen is not the same, observe the vertical bright line and adjust lens focus as specified. When the red chromatic aberration appearing at both sides of the bright line is not equal, observe the side with larger chromatic aberration when adjusting.
POWER SUPPLY CIRCUIT 
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