diff --git a/backend/mustek_usb2.c b/backend/mustek_usb2.c
index ee18e8d1d..7543e53c2 100644
--- a/backend/mustek_usb2.c
+++ b/backend/mustek_usb2.c
@@ -134,9 +134,7 @@ static Scanner_Model mustek_A2nu2_model = {
   SANE_FIX (6.45 * MM_PER_INCH),	/* Size of scan area in TA mode in mm (y) */
 
   RO_RGB,				/* Order of the CCD/CIS colors */
-  SANE_FIX (2.0),		/* Default gamma value */
-
-  SANE_FALSE			/* Is this a CIS scanner? */
+  SANE_FIX (2.0)		/* Default gamma value */
 };
 
 
@@ -378,27 +376,6 @@ init_options (Mustek_Scanner * s)
   s->opt[OPT_PREVIEW].type = SANE_TYPE_BOOL;
   s->val[OPT_PREVIEW].w = SANE_FALSE;
 
-  /* "Debug" group: */
-  s->opt[OPT_DEBUG_GROUP].title = SANE_I18N ("Debugging Options");
-  s->opt[OPT_DEBUG_GROUP].desc = "";
-  s->opt[OPT_DEBUG_GROUP].type = SANE_TYPE_GROUP;
-  s->opt[OPT_DEBUG_GROUP].size = 0;
-  s->opt[OPT_DEBUG_GROUP].cap = 0;
-  s->opt[OPT_DEBUG_GROUP].constraint_type = SANE_CONSTRAINT_NONE;
-
-  /* auto warmup */
-  s->opt[OPT_AUTO_WARMUP].name = "auto-warmup";
-  s->opt[OPT_AUTO_WARMUP].title = SANE_I18N ("Automatic warmup");
-  s->opt[OPT_AUTO_WARMUP].desc =
-    SANE_I18N ("Warm-up until the lamp's brightness is constant "
-	       "instead of insisting on 40 seconds warm-up time.");
-  s->opt[OPT_AUTO_WARMUP].type = SANE_TYPE_BOOL;
-  s->opt[OPT_AUTO_WARMUP].unit = SANE_UNIT_NONE;
-  s->opt[OPT_AUTO_WARMUP].constraint_type = SANE_CONSTRAINT_NONE;
-  s->val[OPT_AUTO_WARMUP].w = SANE_FALSE;
-  if (s->model.is_cis)
-    DISABLE (OPT_AUTO_WARMUP);
-
   /* "Enhancement" group: */
   s->opt[OPT_ENHANCEMENT_GROUP].title = SANE_I18N ("Enhancement");
   s->opt[OPT_ENHANCEMENT_GROUP].desc = "";
@@ -1989,7 +1966,6 @@ sane_control_option (SANE_Handle handle, SANE_Int option,
 	case OPT_NUM_OPTS:
 	case OPT_RESOLUTION:
 	case OPT_PREVIEW:
-	case OPT_AUTO_WARMUP:
 	case OPT_GAMMA_VALUE:
 	case OPT_THRESHOLD:
 	case OPT_TL_X:
@@ -2045,7 +2021,6 @@ sane_control_option (SANE_Handle handle, SANE_Int option,
 	  myinfo |= SANE_INFO_RELOAD_PARAMS;
 	  break;
 	case OPT_THRESHOLD:
-	case OPT_AUTO_WARMUP:
 	case OPT_GAMMA_VALUE:
 	  s->val[option].w = *(SANE_Word *) val;
 	  break;
@@ -2151,7 +2126,6 @@ sane_get_parameters (SANE_Handle handle, SANE_Parameters * params)
 SANE_Status
 sane_start (SANE_Handle handle)
 {
-  int i;
   Mustek_Scanner *s = handle;
 
   DBG (DBG_FUNC, "sane_start: start\n");
@@ -2233,15 +2207,6 @@ sane_start (SANE_Handle handle)
   s->read_rows = s->getpara.dwLength;
   DBG (DBG_INFO, "sane_start : read_rows = %d\n", s->read_rows);
 
-  /*warmming up */
-  if (s->val[OPT_AUTO_WARMUP].w)
-    {
-      for (i = 30; i > 0; i--)
-	{
-	  sleep (1);
-	  DBG (DBG_ERR, "warming up: %d\n", i);
-	}
-    }
   DBG (DBG_INFO, "SCANNING ... \n");
 
   s->bIsScanning = SANE_TRUE;
diff --git a/backend/mustek_usb2.h b/backend/mustek_usb2.h
index a13f395ec..c9f0c86ab 100644
--- a/backend/mustek_usb2.h
+++ b/backend/mustek_usb2.h
@@ -70,9 +70,6 @@ enum Mustek_Usb_Option
   OPT_RESOLUTION,
   OPT_PREVIEW,
 
-  OPT_DEBUG_GROUP,
-  OPT_AUTO_WARMUP,
-
   OPT_ENHANCEMENT_GROUP,
   OPT_THRESHOLD,
   OPT_GAMMA_VALUE,
@@ -107,11 +104,8 @@ typedef struct Scanner_Model
   SANE_Fixed x_size_ta;		/* Size of scan area in TA mode in mm */
   SANE_Fixed y_size_ta;		/* Size of scan area in TA mode in mm */
 
-
   RGBORDER line_mode_color_order;	/* Order of the CCD/CIS colors */
   SANE_Fixed default_gamma_value;	/* Default gamma value */
-
-  SANE_Bool is_cis;		/* Is this a CIS or CCD scanner? */
   /*@} */
 } Scanner_Model;
 
diff --git a/backend/mustek_usb2_asic.c b/backend/mustek_usb2_asic.c
index e94cf1688..d3cfb42c3 100644
--- a/backend/mustek_usb2_asic.c
+++ b/backend/mustek_usb2_asic.c
@@ -1549,22 +1549,6 @@ LLFSetMotorCurrentAndPhase (PAsic chip,
 }
 
 
-#if SANE_UNUSED
-static STATUS
-LLFStopMotorMove (PAsic chip)
-{
-  STATUS status = STATUS_GOOD;
-  DBG (DBG_ASIC, "LLFStopMotorMove:Enter\n");
-
-  Mustek_SendData (chip, ES01_F4_ActiveTrigger, ACTION_TRIGGER_DISABLE);
-
-  Asic_WaitUnitReady (chip);
-
-  DBG (DBG_ASIC, "LLFStopMotorMove:Exit\n");
-  return status;
-}
-#endif
-
 static STATUS
 LLFSetMotorTable (PAsic chip, LLF_SETMOTORTABLE * LLF_SetMotorTable)
 {
@@ -2520,27 +2504,6 @@ DRAM_Test (PAsic chip)
   return status;
 }
 
-#if SANE_UNUSED
-static STATUS
-SetPowerSave (PAsic chip)
-{
-  STATUS status = STATUS_GOOD;
-  DBG (DBG_ASIC, "SetPowerSave:Enter\n");
-
-  if (chip->firmwarestate < FS_OPENED)
-    OpenScanChip (chip);
-
-  if (chip->firmwarestate > FS_OPENED)
-    Asic_ScanStop (chip);
-
-  Mustek_SendData (chip, ES01_94_PowerSaveControl, 0x10);
-
-  chip->firmwarestate = FS_OPENED;
-  DBG (DBG_ASIC, "SetPowerSave:Exit\n");
-  return status;
-}
-#endif
-
 static STATUS
 SetLineTimeAndExposure (PAsic chip)
 {
diff --git a/backend/mustek_usb2_asic.h b/backend/mustek_usb2_asic.h
index e94731914..cdda83817 100644
--- a/backend/mustek_usb2_asic.h
+++ b/backend/mustek_usb2_asic.h
@@ -1069,9 +1069,6 @@ static STATUS OpenScanChip (PAsic chip);
 static STATUS CloseScanChip (PAsic chip);
 static STATUS SafeInitialChip (PAsic chip);
 static STATUS DRAM_Test (PAsic chip);
-#if SANE_UNUSED
-static STATUS SetPowerSave (PAsic chip);
-#endif
 static STATUS SetLineTimeAndExposure (PAsic chip);
 static STATUS CCDTiming (PAsic chip);
 static STATUS IsCarriageHome (PAsic chip, SANE_Bool * LampHome, SANE_Bool * TAHome);
@@ -1229,9 +1226,6 @@ static STATUS LLFSetMotorTable (PAsic chip,
 static STATUS SetMotorCurrent (PAsic chip, unsigned short dwMotorSpeed,
 			       LLF_MOTOR_CURRENT_AND_PHASE * CurrentPhase);
 static STATUS LLFMotorMove (PAsic chip, LLF_MOTORMOVE * LLF_MotorMove);
-#if SANE_UNUSED
-static STATUS LLFStopMotorMove (PAsic chip);
-#endif
 static STATUS LLFSetRamAddress (PAsic chip, unsigned int dwStartAddr,
 				unsigned int dwEndAddr, SANE_Byte byAccessTarget);
 static STATUS LLFRamAccess (PAsic chip, LLF_RAMACCESS * RamAccess);