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HITACHI 50GX30B
Service Manual


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  • Contains Circuit Diagrams
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  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of HITACHI 50GX30B Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

The manual is available in languages: English

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Text excerpt from page 28 (click to view)
NOTES: 1. Since the G light is very important for picture quality and performance, pay special attention in its adjustment. 2. Be careful not to touch the lens with your fingers when adjusting. (5) In case of R lens. Set the position where the chromatic aberration changes from red to crimson. As shown below, observe the vertical bright line and adjust lens focus where the crimson or red chromatic aberration slightly appears inside and crimson or red outside (reference value : 1~3mm) at the point specified in table below. Change the signal and fineadjust in the same way as the G lens. L

OPTICAL FOCUSING ADJUSTMENT BLUE
CHASSIS SCREEN SIZE L1 and L2 (PITCHES from CENTER) L1&L2 COLOR ABERRATION I 43GX10B/50GX10B 43Ó 50Ó 3.0 3.0 50DX10B/60DX10B 60Ó 50Ó 3.0 3.0

* * ** ** * * ** ** 2mm MAX 3mm MAX 3mm MAX 2mm MAX ** ** * *

(NOTE)

O 2mm MAX 3mm MAX 2mm MAX 2mm MAX * Slightly reddish or no color ** Slightly reddish or no color

Adjustment Procedure (7) After all colors have been adjusted, display all colors with the cross-hatch pattern signal and compare the focus (optical focus) performance with the limit sample set. (8) Then, select the circle pattern signal and compare the focus (optical focus) performance of each color and all colors together with the limit sample set. (9) If the focus performance is worse than the limit sample set, re-adjust step (1) to (6).

I
CHASSIS SCREEN SIZE L1 and L2 (PITCHES from CENTER) L1&L2 43GX10B/50GX10B 43Ó 50Ó 3.0 3.0

O
50DX10B/60DX10B 60Ó 50Ó 3.0 3.0

2.5 STATIC FOCUS ADJUSTMENT
Adjustment preparation (1) LENS FOCUS adjustment should be finished. (2) Contrast : MAX Brightness : Center. (3) Receive the circle pattern signal. (4) Apply covers to the lens of the colors you are not adjusting and project only one color on the screen. Adjustment procedure (1) Red and blue static focus adjustment. Adjust the static focus VR on Focus pack (UFPK) so that the center of circle pattern is the most clear. Check that the focus does not get conspicuously worse at the edges of the circle pattern signal or cross-hatch signal. (2) Green static focus adjustment. Adjust the static focus VR on Focus pack (UFPK) (for green) so that the center of circle pattern is the most clear. Check that the focus does not get conspicuously worse at the checking point, the periphery of circle pattern cross-hatch signal. NOTE: Checking point for the periphery of picture.

OPTICAL FOCUSING ADJUSTMENT RED

COLOR ABERRATION

(NOTE)

* * ** ** * * ** ** I 2mm MAX 3mm MAX 3mm MAX 3mm MAX ** ** * * O 2mm MAX 3mm MAX 3mm MAX 3mm MAX * Slightly reddish or no color ** Slightly reddish or no color

NOTE:

Setting the center between Red and crimson is optimum.

(6) In case of B lens. Set the position where the chromatic aberration changes from purple to green. As shown below, observe the vertical bright line and adjust lens focus where the purple or green chromatic aberration slightly appears inside and purple or green outside (reference value : 1~3mm) at the point specified in table below. Change the signal and fineadjust in the same way as the G lens. L

NOTE:

I O Setting to the center between purple and crimson is optimum. Checking point

28

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