diff --git a/hgdriver/hgdev/hg_scanner.cpp b/hgdriver/hgdev/hg_scanner.cpp
index 3ff6c33..8aac3af 100644
--- a/hgdriver/hgdev/hg_scanner.cpp
+++ b/hgdriver/hgdev/hg_scanner.cpp
@@ -2631,11 +2631,11 @@ void hg_scanner::init_settings(const char* json_setting_text)
 				p_time = from_default_language(OPTION_VALUE_XMSJ_SFZ);
 			else if (val > 600 && val <= 1800)
 				p_time = from_default_language(OPTION_VALUE_XMSJ_BXS);
-			else if (val > 600 && val <= 3600)
+			else if (val > 1800 && val <= 3600)
 				p_time = from_default_language(OPTION_VALUE_XMSJ_YXS);
-			else if (val > 600 && val <= 7200)
+			else if (val > 3600 && val <= 7200)
 				p_time = from_default_language(OPTION_VALUE_XMSJ_LXS);
-			else if (val > 600 && val <= 14400)
+			else if (val > 7200 && val <= 14400)
 				p_time = from_default_language(OPTION_VALUE_XMSJ_SXS);
 			if (p_time)
 				setting_jsn_.at(from_default_language(SANE_STD_OPT_NAME_TIME_TO_SLEEP)).at("default") = p_time;	
diff --git a/hgdriver/hgdev/hg_scanner_239.cpp b/hgdriver/hgdev/hg_scanner_239.cpp
index b607265..18c5168 100644
--- a/hgdriver/hgdev/hg_scanner_239.cpp
+++ b/hgdriver/hgdev/hg_scanner_239.cpp
@@ -678,23 +678,13 @@ int hg_scanner_239::discard_all_images(void)
 		ret = SCANNER_ERR_OK;
 		string str;
 		str.resize(block);
-	//{
-	//	std::lock_guard<std::mutex>      lock(io_lock_);
-	//	while (ret == SCANNER_ERR_OK)
-	//	{
-	//		ret = io_->read_bulk(&str[0], &block);
-	//	}
-	//}
 		{
-			std::lock_guard<std::mutex>      lock(io_lock_);
-
-
 			char		buf[64];
 			int			size = sizeof(buf);
 			ret = SCANNER_ERR_OK;
 			setting3399::HGEIntInfo* info = (setting3399::HGEIntInfo*)buf;
 			{
-
+				std::lock_guard<std::mutex>      lock(io_lock_);
 				if (!io_)
 				{
 					return 0;
@@ -717,12 +707,10 @@ int hg_scanner_239::discard_all_images(void)
 
 				size = sizeof(buf);
 				{
+					std::lock_guard<std::mutex>      lock(io_lock_);
 					ret = io_->read_interrupt(buf, &size);
 				}
 			}
-			{
-				io_->set_timeout(oto);
-			}
 		}
 		std::this_thread::sleep_for(std::chrono::milliseconds(1000));
 		if (!io_)