diff --git a/radio/src/audio_avr.cpp b/radio/src/audio_avr.cpp
index 12bbec3b3..9cc416000 100644
--- a/radio/src/audio_avr.cpp
+++ b/radio/src/audio_avr.cpp
@@ -60,7 +60,7 @@ void audioQueue::heartbeat()
       speakerOff();
     }
     else {
-#if defined(PCBGRUVIN9X)
+#if defined(CPUM2560)
       if (toneFreq) {
         OCR0A = (5000 / toneFreq); // sticking with old values approx 20(abs. min) to 90, 60 being the default tone(?).
         speakerOn();
@@ -86,7 +86,7 @@ void audioQueue::heartbeat()
     }
     else {
       if (tone2TimeLeft > 0) {
-#if defined(PCBGRUVIN9X)
+#if defined(CPUM2560)
         if (tone2Freq) {
           OCR0A = (5000 / tone2Freq); // sticking with old values approx 20(abs. min) to 90, 60 being the default tone(?).
           speakerOn();
diff --git a/radio/src/gui/menu_model_flightmodes.cpp b/radio/src/gui/menu_model_flightmodes.cpp
index 5c477b7a9..fa68c52b1 100755
--- a/radio/src/gui/menu_model_flightmodes.cpp
+++ b/radio/src/gui/menu_model_flightmodes.cpp
@@ -262,7 +262,7 @@ void menuModelFlightModesAll(uint8_t event)
       for (uint8_t t=0; t<NUM_STICKS; t++) {
         putsTrimMode((9+LEN_FLIGHT_MODE_NAME+t)*FW+TRIMS_OFS, y, i, t, 0);
       }
-#if defined(PCBGRUVIN9X)
+#if defined(CPUM2560)
       for (uint8_t t=0; t<NUM_ROTARY_ENCODERS; t++) {
         putsRotaryEncoderMode((13+LEN_FLIGHT_MODE_NAME+t)*FW+TRIMS_OFS+ROTARY_ENC_OFS, y, i, t, 0);
       }
diff --git a/radio/src/gui/view_main.cpp b/radio/src/gui/view_main.cpp
index 97cb04021..8dd0b8b7e 100644
--- a/radio/src/gui/view_main.cpp
+++ b/radio/src/gui/view_main.cpp
@@ -514,7 +514,7 @@ void menuMainView(uint8_t event)
       }
     }
     else {
-#if defined(PCBGRUVIN9X) && defined(ROTARY_ENCODERS)
+#if defined(PCBMEGA2560) && defined(ROTARY_ENCODERS)
       for (uint8_t i=0; i<NUM_ROTARY_ENCODERS; i++) {
         int16_t val = getRotaryEncoder(i);
         int8_t len = limit((int16_t)0, (int16_t)(((val+1024) * BAR_HEIGHT) / 2048), (int16_t)BAR_HEIGHT);
@@ -536,7 +536,7 @@ void menuMainView(uint8_t event)
         lcd_vline(x-1, VSWITCH_Y-len, len);
         lcd_vline(x,   VSWITCH_Y-len, len);
       }
-#elif defined(PCBGRUVIN9X)
+#elif defined(CPUM2560)
       for (uint8_t i=0; i<NUM_LOGICAL_SWITCH; i++)
         putsSwitches(2*FW-3 + (i/3)*(i/3>2 ? 3*FW+2 : (3*FW-1)) + (i/3>2 ? 2*FW : 0), 4*FH+1 + (i%3)*FH, SWSRC_SW1+i, getSwitch(SWSRC_SW1+i) ? INVERS : 0);
 #elif !defined(PCBSTD)
diff --git a/radio/src/mixer.cpp b/radio/src/mixer.cpp
index 996a2f88d..2444c6061 100644
--- a/radio/src/mixer.cpp
+++ b/radio/src/mixer.cpp
@@ -1000,7 +1000,7 @@ uint8_t   flightModeTransitionLast = 255;
 
 void evalMixes(uint8_t tick10ms)
 {
-#if defined(PCBGRUVIN9X) && defined(DEBUG) && !defined(VOICE)
+#if defined(PCBMEGA2560) && defined(DEBUG) && !defined(VOICE)
   PORTH |= 0x40; // PORTH:6 LOW->HIGH signals start of mixer interrupt
 #endif
 
diff --git a/radio/src/targets/mega2560/doc/MEGA2560.sch b/radio/src/targets/mega2560/doc/MEGA2560.sch
index adaaa8efe..c6ca184e2 100644
--- a/radio/src/targets/mega2560/doc/MEGA2560.sch
+++ b/radio/src/targets/mega2560/doc/MEGA2560.sch
@@ -29,13 +29,14 @@ LIBS:opto
 LIBS:atmel
 LIBS:contrib
 LIBS:valves
+LIBS:MEGA2560-cache
 EELAYER 27 0
 EELAYER END
 $Descr A4 11693 8268
 encoding utf-8
 Sheet 1 1
 Title "OpenTX board based on Arduino MEGA2560"
-Date "28 dec 2014"
+Date "3 jan 2015"
 Rev "0"
 Comp "Copyright 2015 F. Aguerre"
 Comment1 ""
@@ -46,7 +47,7 @@ $EndDescr
 Wire Wire Line
 	9050 2900 8050 2900
 Wire Wire Line
-	9050 2700 8050 2700
+	8050 2700 9050 2700
 Wire Wire Line
 	8100 5250 7800 5250
 Wire Wire Line
@@ -127,7 +128,7 @@ Wire Notes Line
 Wire Wire Line
 	10750 2400 10750 2250
 Wire Wire Line
-	7600 1400 7600 1500
+	8100 1400 8100 1500
 Wire Wire Line
 	6900 1500 6900 1000
 Wire Wire Line
@@ -526,7 +527,7 @@ Wire Wire Line
 Wire Notes Line
 	8450 4700 8000 4700
 Wire Wire Line
-	9050 2800 7600 2800
+	7600 2800 9050 2800
 $Comp
 L SW_PUSH .
 U 1 1 5499AF9B
@@ -1153,23 +1154,23 @@ $EndComp
 $Comp
 L GND #PWR?
 U 1 1 54992E9C
-P 7600 1500
-F 0 "#PWR?" H 7600 1500 30  0001 C CNN
-F 1 "GND" H 7600 1430 30  0001 C CNN
-F 2 "" H 7600 1500 60  0001 C CNN
-F 3 "" H 7600 1500 60  0001 C CNN
-	1    7600 1500
+P 8100 1500
+F 0 "#PWR?" H 8100 1500 30  0001 C CNN
+F 1 "GND" H 8100 1430 30  0001 C CNN
+F 2 "" H 8100 1500 60  0001 C CNN
+F 3 "" H 8100 1500 60  0001 C CNN
+	1    8100 1500
 	1    0    0    -1  
 $EndComp
 $Comp
 L C C1
 U 1 1 54992E49
-P 7600 1200
-F 0 "C1" V 7550 1050 50  0000 L CNN
-F 1 "100n" V 7650 1050 50  0000 L CNN
-F 2 "" H 7600 1200 60  0001 C CNN
-F 3 "" H 7600 1200 60  0001 C CNN
-	1    7600 1200
+P 8100 1200
+F 0 "C1" V 8050 1050 50  0000 L CNN
+F 1 "100n" V 8150 1050 50  0000 L CNN
+F 2 "" H 8100 1200 60  0001 C CNN
+F 3 "" H 8100 1200 60  0001 C CNN
+	1    8100 1200
 	1    0    0    -1  
 $EndComp
 $Comp
@@ -41571,4 +41572,16 @@ F 3 "" H 10450 3850 60  0001 C CNN
 	1    10450 3850
 	-1   0    0    -1  
 $EndComp
+Wire Wire Line
+	6050 7150 6500 7150
+Wire Wire Line
+	5100 7150 5250 7150
+Text Label 6500 7150 2    42   ~ 0
+OpenTX  I/O
+Text GLabel 5250 7150 2    42   Output ~ 0
+port pin (initial state) 
+Text Notes 5500 7050 0    60   ~ 0
+Caption
+Text Label 5550 2550 2    42   ~ 0
+Gain = 1 + R3/R6
 $EndSCHEMATC
diff --git a/radio/src/targets/mega2560/doc/MEGA2560_Listing.xls b/radio/src/targets/mega2560/doc/MEGA2560_Listing.xls
index 051caa8bb..c8043a70d 100644
Binary files a/radio/src/targets/mega2560/doc/MEGA2560_Listing.xls and b/radio/src/targets/mega2560/doc/MEGA2560_Listing.xls differ
diff --git a/radio/src/targets/mega2560/doc/MEGA2560_SCH.pdf b/radio/src/targets/mega2560/doc/MEGA2560_SCH.pdf
index 95b3d7a2d..204a553c0 100644
Binary files a/radio/src/targets/mega2560/doc/MEGA2560_SCH.pdf and b/radio/src/targets/mega2560/doc/MEGA2560_SCH.pdf differ
diff --git a/radio/src/targets/mega2560/doc/MEGA2560_pcb.pdf b/radio/src/targets/mega2560/doc/MEGA2560_pcb.pdf
index 386300f32..fe56eaaae 100644
Binary files a/radio/src/targets/mega2560/doc/MEGA2560_pcb.pdf and b/radio/src/targets/mega2560/doc/MEGA2560_pcb.pdf differ