Supra 3P51 Service manual

SERVICE MANUAL

CHASSIS

Design and specifications are subject to change without prior notice. ( ONLY REFERRENCE)

ENGINEER BY: CHECKED BY: PPROVED BY:

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Service Adjustments

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Servic e Adj ustments

3P51 ADJUST MENU

1.FACTORY MODE:

(1)Assembly line adjust mode: Press S.M., (DISPLAY) and keys in turn to enter this mode.

(2)Engineer adjust mode: Press CLOCK, P.M. and keys in turn to enter this mode. This mode is usually for R&D and engineering department use.

(3)Press digital keys to enter every adjust page, use PROG+/- keys to pick adjust items, use VOL+/- keys to adjust the value. (4)Press DISPLAY to quit factory mode.

2.B+ VOLT AGE ADJUST Measure C600A + voltage, adjust VR641 to get proper B+ voltage according to CRT

assembly list requirement.

3. RF AGC VOLT AGE ADJUST

(1)Receive 294.25MHz,60dBcolor bar signal. (2)Enter factory mode and press digital key “4”. (3)Measure tuner AGC point voltage, adjust AGC item till the voltage is 2.4V,or till picture noise just disappears。Usually the AGC value is fixed to 27.

4、 FINE ADJUST：

(1) FOCUS ADJUST

a. Receive cross-hatch pattern signal。 b. Set picture to“ RICH” mode。 c. Adjust FBT’s FOCUS knob till picture is clear。

(2) SCREEN VOLTAGE ADJUST(KEY 0 )：

a. Set picture to“STANDARD”mode，without signal input; b. Enter factory mode and press digital key”0” c. Adjust FBT’s SCREEN knob till VG2 voltage flag changes between “LOW” and “HIGH”，press PROG+ key to enter other menu。

(3) HORIZON ADJUST(KEY 1 ):

a. Receive 50HZ monoscope PATTERN. Set TV to standard mode. Press KEY1 to enter

factory mode

b. Adjust 5HSH(for 60Hz picture,its is 6HSH)to set picture horizontal center to CRT

horizontal center.

c. Receive 60HZ monoscope PATTERN, repeat above b item

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Servic e Adj ustments

(4)VERTICAL&YUV/RGB HORIZON ADJUST(KEY2 ):

5VSL 50HZ vertical linearity 5SCL 50Hz vertical slope correction 5VSH 50Hz vertical center 5VAM 50Hz vertical size 6VSL 60HZ vertical linearity 6SCL 60HZ vertical slope correction 6VSH 60HZ vertical center 6VAM 60HZ vertical size

a. Receive 50Hz cross hatch signal, set TV to STANDARD mode, press digital key “2”

after enter factory mode, adjust 5VSL so that picture’s vertical line is just at the

bottom of the half picture. b. Adjust 5VSH to set picture vertical center to CRT center. c. Adjust 5SCL to set proper vertical linearity d. Adjust 5VAM to obtain picture’s vertical re-display ratio more than 90% . e. If necessary, fine adjust above items.

f. Receive 50HZ RGB or YUV cross hatch signal,set TV to STANDARD mode,adjust

5RGH till picture horizontal center is at the CRT center.(OPTION)

g. h. Receive 60Hz cross hatch signal, repeat above a,b. f.Receive 60HZ RGB or YUV cross hatch signal,repeat above items.(OPTION)

(5) OSD POSITION:

4-6-1 Menu OSD position adjustment: Receive 50/60HZ cross hatch pattern. Set

TV standard status. Press KEY 2 in factory mode, adjust 5VOF/6VOF and HOF item, to obtain menu OSD at the center of CRT screen;

4-6-2 LOGO position adjustment: Receive 50/60HZ cross hatch pattern. Set TV

standard status. Press KEY 7 in factory mode, adjust XMIN,XMAX,YMIN, and YMAX item, to obtain LOGO at the center upto 1/3 of CRT screen.

4-6-3 TELETEXT OSD position adjustment: Receive 50/60HZ TELETEXT signal.

Set TV standard status. Press KEY 7 5TYM/6TYM item, to obtain INDEX at the center of CRT screen.

4-2 White Balance Adjustment (Applied in factory)（KEY 3 ）

Normally, this chassis can auto adjust white balance, but for some CRT need to adjust white balance carefully by hand，Set BRIGHTNESS and CONTRAST at normal status , receive GREY SCAL and entering factory mode press KEY 3, set WPR at 31, adjust WPG and WPR to obtain white balance.

in factory mode, adjust TXMI and

4-3 RF.AGC ADJUSTMENT(KEY 4 )

4-3-1 Receive 60dB RF signal. Connect Digital voltmeter positive terminal to

tuner AGC terminal and negative terminal to GND.

4-3-2 Enter the AGC item in factory mode by the REMOTE CONTROL. Method：Press key S.M., , in turn to enter factory mode, then

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