Miscellaneous Adjustments; Service Mode Chart - RCA PGOTOFACT 27V412T Technical Service Data

Page 1 SET 5303

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