These are the service modes I found while playing with my Mitsubishi TS-5053 (50 inch rear-projection, manufactured Feb 1995) TV. I've also added some attributes based on information I got from other sources (thanks).
Your Mitsubishi TV may differ. It will definitely be different if you've got a direct-view (tube) TV, as opposed to a projection unit. So some of the attributes listed may not apply to you, you may have other attributes not listed, and you may need to use one of a number of other methods for getting into Mitsubishi service modes.
A note on why I did this. The short answer is: I told my wife I was about to pay US$60 for the service manual, and she gave me one of those looks that made me realize I wasn't going to buy the service manual. I wasn't ever going to service the unit, after all; I'm a software guy. So I decided I'd map out the service codes myself.
A note on how I did this. In early 1996, I found a posting from Louis A. Carliner on rec.video that said how to get into one of the service modes from the remote control. Armed with that code, I tried lots of similar combinations, and I kept a journal of what I found.
From a time-is-money perspective, it would have been cheaper to buy the service manual. But then I wouldn't be sharing all this information with you, and isn't that what the Web is for?
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The general rule is: use some combination of keys on your remote to enter a service "screen." Within a service screen, you can use the AUDIO button to cycle through different "sub-screens." On each sub-screen, using the VIDEO button, you can advance to the next "attribute." Use the up and down buttons to increase and decrease the value. Sounds complicated, but it's not.
Usually, each sub-screen has many possible attributes. In the attribute tables below, I've listed the attribute numbers and mnemonics as they appear, as well as their default value -- at least what the values were when I first got my TV. Yours will likely be different. I also list the minimum and maximum values for the attribute, and any comments. There are a lot of comments and explanations missing. If you can fill me in, I'll add the info to this list.
The notation (F) means the value is FIXED. It's possible
that the adjustments can be temporarily changed, but are not written
to memory.
Note that I'm not using HTML tables. That's because they are tedious and I'm not building the page with a fancy HTML editor.
Point your remote control at the TV and press these buttons, one
after the other: MENU 2 3 5 7.
This gets you to the main service screen.
These look like standard video adjustments.
VCH def min max (select VIDEO to go to the next item) 0 COL 65 00 127 Color 1 TNT 65 00 127 Tint 2 BRT 145 ?? 174 Brightness 0: darkest (TV shut off at 174) 3 CNT 82 00 127? Contrast 0: most contrast (lost picture at 118) 4 SHP 08 00 127 Sharpness 0: sharpest 5 CTR Red Bias / Cutoff direct-view only 6 CTG Green Bias / Cutoff direct-view only 7 CTB Blue Bias / Cutoff direct-view only 8 DHR 84 00 127 Drive High Red (blue/black text) 9 DHB 73 00 127 Drive High Blue 10 VHT 57 00 127 Vertical Height 0: shortest 11 PAM 17 00 63 Pincushion 0: none ? 12 HWD 33 00 63 Horizontal Width 0: narrowest 13 YDL 01 00 01 Y Delay 14 DL2 00 00 01 Aperture Control Delay Volume Selection (F) 15 DCT 00 00 01 DC Transmission Volume Selection (F) 17 AFC 02 01 03 Auto Freq Control? 19 SVC Service Switch? 24 SHN 00 00 01 Sharpness Selection (F) projection only? 26 CRS Cutoff Switch, Red 28 DRR Red Drive? 29 DRB Blue Drive? 30 CBS Cutoff Switch, Blue 33 DL1 04 00 07 Preshoot/Overshoot (F) 34 PED 12 00 15 Black Expansion Gain (F) 35 GMA 08 00 15 White Gamma Level (F) 36 GMG 08 00 15 White Gamma Gain (F) 37 BES 07 00 07 Black Expansion Slice Position (F) 38 R-Y 22 00 31 Demodulation Axis R-Y (F) 39 B-Y 29 00 63 Demodulation Axis B-Y (F) 40 G-Y 01 01 03 G-Y Ratio Selection direct-view only? 41 WHC 08 00 15 White Character Correction (F) 42 WHV 07 00 15 White Character Slice Position (F) 43 HPH 18 00 31 Horizontal Position 44 VSC 16 00 63 Vertical S-Correction 45 VLR 19 00 63 Vertical Linearity 46 VSF 01 00 02 Vertical Position (screen jumps when setting changed) 47 PPH 22 00 63 Pincushion Corner Correction - phase 48 PC1 01 00 07 Pincushion Corner Correction - corner 1 49 PC2 03 00 07 Pincushion Corner Correction - corner 2 50 VCM Vertical Centering/Size? direct-view only? 51 HCM Horizontal Centering/Size? direct-view only? 56 SCN 82 00 127? (black/blue text) lost picture at 110
MCS = Multi-Channel Sound?
MCS 1 0 0 1 0 0 PVC 31 00 63 SAP VCO (Voltage Controlled Oscillator) (MCS 0 1 0 1 0) 1 TVC 22 00 63 Stereo VCO (1th MCS bit: 1 < 30, 0 => 30) 2 INP 21 00 63 Input Level 3 FIL 14 00 63 Filter (MCS 0 1 0 1 0) 4 LSP 33 00 63 Low Sound Separation (MCS 1 0 0 1 0) 5 HSP 33 00 63 High Sound Separation
These are controls for Picture-In-Picture.
PIP 1 1
0 TINT 21 00 63 PIP Tint
1 COLR 31 00 63 Color
2 DECD 00 00 01 Color Reset (F)
3 SYNC 01 00 07 Sub-Picture Sync Separation Threshold (F)
4 RVS 00 00 01 '01' turns main screen white, changes to 'PIP 0 1'
5 BG-Y 12 00 15 BackGround Luminance Level (F)
6 BSTB 10 00 63 Burst White Background Displayed (F)
7 MVW 00 00 03 Sub-Picture Macrovision (F)
8 CRTN 01 00 03 Sub-Picture Vertical Position (F)
All the items in this group below(F) fixed values
9 VXA 97 91 255 Y location of PIP window
10 HXAO 130 17 139 X location of PIP window
11 ADJ9 08 00 15
12 YDL9 14 08 29
13 HPX9 45 00 255
14 VYA9 188 00 255 pip window height (cuts off bottom scan lines)
15 HYA9 59 06 255 pip window width
16 ADJ6 07 00 15 (small window)
17 YDL6 12 08 29
18 HPX6 100 00 255
19 VYA6 206 00 255
20 HYA6 46 06 255
21 VXAM 236 207 255 multi-window vert position
22 HXAM 26 15 150 multi-window horiz position
23 VXBM 233 200 255 vert spacing betw windows
HR 9 0 20 4 green corner boxes left or right. This might be the
text overlay area for videotext & captioning services.
This is a feature of the HD1080 (not the TS-5053).
BR0 0 63 Brightness Level 0 - dark room BR1 0 63 Brightness Level 1 - lights on BR2 0 63 Brightness Level 2 - daylight CN0 0 63 Contrast Level 0 - dark room CN1 0 63 Contrast Level 1 - lights on CN2 0 63 Contrast Level 2 - daylight 0TO1 0 255 Level 0 to Level 1 incoming light threshold 1TO2 0 255 Level 1 to Level 2 incoming light thresholdHere is a write up of the Iris feature.
Selecting AUDIO from the last sub-screen gets you back to the VCH sub-screen.
In addition, on the HD1080, pressing "1" and "2" change some settings -- 1 seems to adjust the horizontal aspect ratio, and 2 seems to cycle through different vertical aspect ratios. The TV can correctly display a 16x9 image on the 4:3 screen, which is an exciting feature for DVD owners, unfortunately it's not clear how to get the TV to stay in this mode when you exit the service menu.
MENU 2 3 5 9 4 to make changes
against an internally generated grid, or
MENU 2 3 5 9 5
to set them without a grid (useful if you've got a copy of AVS
in your videodisc player).
| WARNING - DO NOT SET HSTA or VSTA ABOVE 200. This can cause your set to shut down, and there is no known way to reset it on some TVs. |
CONV Red 0 HSTA 109 00 254 Horizontal Static Position 1 VSTA 122 00 254 Vertical Static Position 2 TILT 120 00 254 Tilt of Horizontal Lines (also known as Skew) 3 BOW 128 00 254 Bow of Horizontal Lines 4 VWID 154 00 254 Vertical Height 5 VLIN 124 Vertical Linearity 6 HWID 129 Horizontal Width 7 HLIN 175 Horizontal Linearity 8 SKEW 148 Tilt of Vertical Lines (also known as Skew) 9 VBOW 132 Bow of Horizontal Lines 10 HSDL 49 Left Horizontal Sides 11 HSDR 58 Left Vertical Sides 12 VKLU 164 Vertical Keystone Left Upper 13 VKLL 86 Vertical Keystone Left Lower 14 VKRL 140 Vertical Keystone Right Lower 15 VKRU 120 Vertical Keystone Right Upper 16 HKLU 91 Horizontal Keystone Left Upper 17 HKLL 120 Horizontal Keystone Left Lower 18 HKRL 112 Horizontal Keystone Right Lower 19 HKRU 108 Horizontal Keystone Right Upper 20 DA40 134 Horizontal Linearity at the middle 1 21 DA41 134 Horizontal Linearity at the middle 2 22 DA42 35 23 DA43 148 Horizontally Sloping Ends - Left 24 DA44 146 Horizontally Sloping Ends - Right 25 DA50 96 26 DA51 230 27 DA52 158 28 DA53 147 Vertically Sloping Ends - Top 29 DA54 82 Vertically Sloping Ends - Bottom CONV Blue 30 HSTA 160 00 254 Horizontal Static Position 31 VSTA 116 00 254 Vertical Static Position 32 TILT 122 00 254 Tilt of Horizontal Lines (also known as Skew) 33 BOW 125 00 254 Bow of Horizontal Lines 34 VWID 137 00 254 Vertical Height 35 VLIN 115 Vertical Linearity 36 HWID 106 Horizontal Width 37 HLIN 169 Horizontal Linearity 38 SKEW 130 Tilt of Vertical Lines (also known as Skew) 39 VBOW 122 Bow of Horizontal Lines 40 HSDL 111 Left Horizontal Sides 41 HSDR 57 Left Vertical Sides 42 VKLU 123 Vertical Keystone Left Upper 43 VKLL 141 Vertical Keystone Left Lower 44 VKRL 114 Vertical Keystone Right Lower 45 VKRU 142 Vertical Keystone Right Upper 46 HKLU 153 Horizontal Keystone Left Upper 47 HKLL 131 Horizontal Keystone Left Lower 48 HKRL 144 Horizontal Keystone Right Lower 49 HKRU 138 Horizontal Keystone Right Upper 50 DA40 125 Horizontal Linearity at the middle 1 51 DA41 127 Horizontal Linearity at the middle 2 52 DA42 95 Keystone Offset 53 DA43 112 Horizontally Sloping Ends - Left 54 DA44 99 Horizontally Sloping Ends - Right 55 DA50 243 56 DA51 195 57 DA52 195 58 DA53 101 Vertically Sloping Ends - Top 59 DA54 145 Vertically Sloping Ends - Bottom
MENU 2 3 5 8 to get the screen.
In general you probably don't need to mess with these, unless you get
confused while tweaking and you end up with a horrible picture -- in which
case you can just reset the controls back to the factory defaults.
Initial
E2RESET CCD :On
Hotel :Off Auto Clock :On
Call letr. :On
Net name :On
Prog name :On
Prog descr :On
This screen has more stuff on other TVs, like the 31 and 35-inch direct-view
TVs. I know about
PIP :On
Montr. Fix :Off
Auto Turn :Off
Antenna :1
Input :1
System 1A :Off
and
Power Res (power reset??)
E2RESET resets the EEPROM (get it? E2 == EE). Here's a quote from an authorized service tech:
Just a friendly warning. Never press E2RESET. It resets all settings to almost arbitrary values. It is very painful to have to reset the values.Supposedly, if you want to reset the TV to somewhat sane values, select Initial (Initialize). I have not tried this.