Factory Menu Items - Zenith Presentation Series Service Manual

FACTORY MENU ITEMS

31 Mute time: Time during the TV stays in blank state
when Real Time= Mute Time * lbms the switching is
between sources.
32 Y/C Loop out: Enable/Disable the Y/C out of the rear
Jack Pack.
33 Auto Camport: Enable/Disable the Camport Auto De-
tect.
34 Not Used
35 A Att: Adjust the signal level input to COMPIN (Pin
19) to the standard input level. Variable range of the
input signal: 245 mVrms –5.0 dB to +3.0 dB. 0 = Level
min. and 15 = Level max.
36 A Vco: Adjust STEREO & SAP VCO free running fre-
quency (fo). Variable range: fo ±20%. 0 = Free run-
ning frequency min, 63 = Free running frequency max.
37A Filter: Adjust the filter fo of the ST, SAP and dbx
blocks. Variable range: fo ±20% 0 = Frequency min,
63 = Frequency max.
38 A Spectral: Perform high frequency (fs= 3 kHz) sepa-
ration adjustment. 0 = Level max, 63 = Level min.
39 Wide Band: Perform low frequency (fs= 300 Hz) sepa-
ration adjustment. 0 = Level min, 63 = Level max.
NTSC IC 221-1377 FROM 40 TO 61
40 Hue: Hue Control. Range: 0-63, 0 = Flesh color ap-
pears red, 63 = Flesh color appears green.
41 Dpic off: Y black expansion ON/OFF switch. Range: 0-
1, 0 = ON, 1 = OFF.
42 Color: Color control. Range: 0-63, 0 = Minimum 63 =
Maximum.
43 Canal: When this register is set to "1", the first and
last 3H of the video are replaced by DC during YUV
output. Range: 0-1, 0 = No video portion DC replace-
ment, 1 = DC replacement.
44 Sharpness: Sharpness control. Range: 0-1, 0 = Mini-
mum, 15 = Maximum.
45 Sub Cont: Sub contrast adjustment. Range: 0-15, 0 =
Minimum, 15 = Maximum.
46 Sub Hue: Hue center adjustment. Range: 0-15, 0 =
Flesh color appears red, 15 = Flesh color appears green.
47 Sub Color: Color center adjustment. Range: 0-15, 0 =
Minimum, 15 = Maximum.
48 C-Trap Adj: Chroma trap adjustment. Range: 0-15, 0
= High, 7 = Center, 15 = Low.
49 Afc: AFC loop gain selector. Range 0-15, 0 = AFC loop
gain high, 1 = AFC loop gain medium, 2 = AFC loop
gain low, 3 = AFC loop open, free-running mode.
SR23 - 923-03509
SERVICE MENU (continued)
2-3
50 Trap on: Y system chroma trap ON/OFF. Range 0-1, 0 =
OFF, 1 = ON.
51 Tot on: Chroma TOT filter ON/OFF. Range 0-1, 0 = OFF,
1 = ON.
52 Y Drive: Y output gain control. Range: 0-31, 0 = -
6.3dB, 31 = +3.5dB.
53 Shp-F0: Sharpness f0 selector. Range: 0-1, 0 = 3Mhz,
1 = 1.5Mhz.
54 Cd Mode2: V sync. signal pull-in speed selector Range:
0-1, 0 = Standard 1 = High speed.
55 U Ped: DC control of pedestal portion of U output
(for video). Range: 0-15, 0 = -35mV, 7 = Center, 15 =
+40mV.
56 V Ped: DC control of pedestal portion of V output (for
video). Range: 0-15, 0 = -35mV, 7 = Center, 15 =
+40mV.
57 Dc Tran: DC transmission ratio setting. Range: 0-7, 0
= Maximum (100%), 7 = Minimum (78%).
58 Pre Over: Sharpness preshoot/overshoot ratio set-
ting. Range: 0-3, 0 = 1:1 (pre:over), 3 = 4:1 (pre:over).
59 Abl Cent: ABL center voltage control. Range: 0-3, 0 =
Minimum, 3 = Maximum.
60 Abl: ABL gain control. Range: 0-1, 0 = Standard, 1 =
Low.
61 Delay: Allows the following delay times to be added
to the Y signal. Range 0-3, 0 = 0nS, 1 = 60nS 2 =
120nS, 3 = 180nS.
NTSC IC 221-1376 FROM 62 TO 111
62 Akb-T: Selection of timing pulse, which generates
reference pulse (Set to NORMAL mode at power on).
Range 0-1, 0 = NORMAL mode (reference pulse gener-
ated by SCP input only), 1 = V compression mode (ref-
erence pulse generated from VTIM-IN,HP-IN).
63 Blksw: Selection of H, V blanking system for RGB-OUT
(Set to 0 at power on). Range: 0-1, 0 = Normal blank-
ing mode (blanking up to VCE(sat) level, 1 = Blanking
at value set by BLK-BOTTOM (Refer to the description
of the BLK-BOTTOM register).
64 Mat-Out: Selection of type matrix conversion; selected
signal is output from pins 76,77 and 78. A DC voltage
of approximately 4V is output only for 3 of these
modes. Range 0-3, 0 = THROUGH1 (when YCbCr is in-
put, normal NTSC input), 1 = Matrix of YPbPr to YCbCr
signal, 2 = Matrix conversion of GBR to YCbCr signal, 3
= THROUGH2 (GBR is input directly to internal RGB
system, SVGA input).
CS - SERVICE MENUS