Miscellaneous Adjustments; Service Mode Chart - RCA 24F512T Technical Service Data

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MISCELLANEOUS ADJUSTMENTS

HIGH VOLTAGE TEST
High voltage must not be higher than 31.8kV at any beam current.
X RAY PROTECTION TEST
Tune the set to receive a crosshatch signal. Apply an external power supply
to the positive lead of C249 (observe polarity). Slowly increase the voltage
from the supply. The set must shut down and remain off when the voltage
reaches 30V.
B+
Tune the set to receive a crosshatch signal, set the preset picture mode to
normal, and adjust VR802 for 130V ±0.5V at the positive lead of C422.
RF AGC
The RF AGC is factory preset at the time of manufacture for optimum
operation over a wide range of RF signal input conditions and should not
need readjustment, unless there is cable TV adjacent channel interference
or picture bending or channel 6 color beats because of excessive RF signal
input, this can occur if the receiver is located too close to the transmitting
tower. The signal should be attenuated at the antenna to reduce the signal
to a satisfactory level.
NOTE: Adjusting the RF AGC to extreme limits of its parameters unusu-
ally provides a poor signal to noise ratio.
SCREEN
Tune the set to receive a crosshatch signal, set the preset picture mode to
normal and set all of the picture controls (brightness, contrast, etc) to
midrange. Enter the service mode and preset the menu 1 values. Set RC,
GC, and BC to 80, GD and BD to 40. While still in the service mode, press
the input button on the remote and the vertical will collapse. Adjust the
screen control to produce a dim horizontal line on the CRT.
COLOR TEMPERATURE
Test point Display
Adjust: Menu 1 RC Red Cutoff
Menu 1 GC Green Cutoff
Menu 1 BC Blue Cutoff
Menu 1 GD Green Drive
Menu 1 BD Blue Drive
Set color picture temperature to normal and set all of the picture controls
(brightness, contrast, etc) to midrange. Tune the set to receive a gray scale
stairstep test pattern. Enter the service mode and adjust the values for
cutoff and drive controls to obtain proper color tracking, no tinting of black
and white and shades of gray, and color temperature is 9300 degrees - X =
284, Y = 299.
SUB BRIGHTNESS
Tune the set to receive a gray scale stairstep signal from the A/V inputs. Set
picture color temperature to normal, Set all of the picture controls
(brightness, contrast, etc) to midrange. Enter the service mode and select
menu 5. Adjust the value of BRTC sub brightness to just light the second
dark bar, making sure the first bar stays black.
Test point Display
Adjust: Menu 3 HPOS6 H Position
Menu 3 PARA6 H Parabola
Menu 3 TRAP 6 H Trapazoid
Menu 3 HSIZE6 H Size
Menu 3 CNRT6 H Corner Top
Menu 3 CNRB6 H Corner Bottom
Menu 2 HIGHT6 Height
Menu 2 VLIN6 Linearity
Menu 2 VP60 Vertical Center
Menu 2 VSC6 Vert S Correct
NOTE: Confirm correct convergence and purity before adjusting geometry.
Tune the set to receive a circular test pattern to make visual geometry
adjustments. Enter the service mode. Adjust menu 2 and menu 3 values for
the least amount of geometric distortion approximately 7% overscan.
SERVICE MODE
NOTE: Pressing the 1 and input buttons on the remote will shut the set
down if you are in the service mode.
To enter the service mode, press and hold the volume down button on the
set while pressing the info/del button on the remote. Menus 1 thru 10 can
be accessed directly using the remote keypad number buttons. For menu 11
press the 1 and notepad buttons on the remote; menu 12 press the 1 and
caps buttons on the remote; menu 13 press 1 and info/del buttons on the
remote; menu 14 press 1 and sleep buttons on the remote; menu 15 press 1
and calendar buttons on the remote; 16 press 1 and insert buttons on the
remote; menu 17 press 1 and FAV buttons on the remote; menu 18 press 1
and go back buttons on the remote. If any of the service mode menu items
have been adjusted, press the sound button to save the settings, and exit the
service mode.

SERVICE MODE CHART

Item Setting Item
Menu 1 Menu 6
FAC01 FAC06
RC 76 ST3
GC 86 SV3
BC 7B SV4
GD 33 SVD
BD 2E ASSH
Menu 2
SHPX
SHPN
Menu 7
FAC02
HIGHT6 19
VP60 07 FAC07
VLIN6 0A MOD1
VSC6 0A MOD2
VBLK6 0A MOD3
VCEN6 2B OPT
Menu 3
OPTM1
OPTM2
HDCNT
FAC03
HSTOP
HPOS6 13
Menu 8
PARA6 1C
TRAP6 22
HSIZE6 1F FAC08
CNRT6 0A RFAGC
CNRB6 09 BRTS
VEHT6 03 OSD
HEHT6 03 OSDF
Menu 4
CCD OSD
CCD OSDF
TXCX
FAC04
RGCN
CNTX 7F
Menu 9
CNTN 08
BRTX 20
BRTN 20 FAC09
COLX 35 V01
COLN 00 V25
TNTX 30 V50
TNTN 30 V100
Menu 5
VOLMAX
CURTCEN
GATE
FAC05
VOL-OUT
BRTC 3C
Menu 10
COLC 23
COLP 00
SCOL 07 FAC10
SCNT 06 MODE4
CNTC 4C MODE5
TNTCT 37 MODE6
TNTCV 37 MODE7
MODE8
MODE8
Setting Item Setting Item
Menu 11 Menu 15
FAC11 FAC15
20 MPB STR 43 RC-C
20 MPB HMC 0D GC-C
19 MPB HP 07 BC-C
19 MPB LP 11 GD-C
07 MPB LIM 00 BD-C
Menu 16
10 SUB FRE 28
2A SUB HP 02
VOL MAI 00
FAC16
Menu 12
RC-W
GC-W
60 FAC12 BC-W
B0 SVM 05 GD-W
70 SVM1 05 BD-W
36 OSD2 20 YUVGC
C1 OSDF2 64 YUVBC
Menu 17
00 PYNX 28
00 PYNN 18
FF PYXS 22
FAC17
PYNS 10
D-COL
Menu 13
D-BRI
D-CON
26 FAC13 D-SHP
Menu 18
00 CLTM 4F
21 CLVO 48
53 CLVS 4F
FAC18
4A ABL 27
S-COL
65 DCBS 12
S-BRI
1F FLGO 82
S-CON
16 FLG1 0D
S-SHP
Menu 14
FAC14
46 HAFC 09
5A AGCC 1C
65 NOIS 01
7F ONTM 08
32 NSHP 1A
A5 PVLVL 80
2A PLMT 80
73
22
0B
1E
C4
2D
C2
Setting
FC
02
00
FD
0A
04
01
02
FB
E7
F7
08
32
32
5A
32
32
32
4B
32