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It's the manual, I am searching for. Now I am able to repair my Braun A501.
Text excerpt from page 9 (click to view)
HANDSET SECTION
MANUAL TEST MODE Set the Test Mode: 1. Enter the test mode by pressing 0 key while pressing 1 and TALK keys when in idle condition. (Key operation 0 t 1 t TALK ) 2. The RINGER will ring for 500 msec. when the test mode is started. 3. Measurement mode of consumption current. (42# state) 4. Use key input to carry out the various settings. 5. Use port inputs to set output from LED terminals. Release the Test Mode: 1. Press the 0 , 0 and # keys. 2. Turn off the power. (Remove the battery and replace them.)
MACHINE TEST MODE Set the Test Mode: 1. When power on reset is applied while a �H� (high) is input the TEST SW (TP43) terminal (IC501 r; pin), the RING (Level H, 500 msec) sounds. 2. Following that, at timing in which the TEST SW terminal has �H� (high) input, there is output of �L� (low) by the CH (channel) setting control terminal. Then there is PLL setting to the CH which was read to with the CH setting terminal according to that �L� (low) output. 3. Set the TX setting to TX OFF. 4. The channel is set by voice not by data. 5. Use port inputs to set output from LED terminals. Release the Test Mode: 1. Press the OFF key. 2. Remove the short plug and turn on the power.
� hand main board (side B) � TP36 TP35 TP43 TP44 TP33 IC501 TP14 TP16 TP13 TP15 TP17
