75
	PHONEPLUG  +-----------/\/\/\----------+-------+
	 tip       |             R2            |       |
	o----------+        _                  |       |
			  --+-- REHEARSE       |       | 
	-----------+------o   o----------------+       \  52
	PL1        |   S5   _                          /  R1
		   |      --+-- AUTO LOOP              \
		   +------o   o------------------------+
		   |   S1                              \  52
		   |        _                          /  R3
		   |      --+-- LOOP END               \
		   +------o   o------------------------+
		   |   S4                              \  52
		   |        _                          /  R4
		   |      --+-- LOOP START             \
		   +------o   o------------------------+
		   |   S3                              \  52
		   |        _                          /  R5
		   |      --+-- LOCATE 0               \
		   +------o   o------------------------+
		   |   S2                              \  52
		   |        _                          /  R6
		   |      --+-- PUNCH IN               \
		   +------o   o------------------------+
		   |   S7                              \  52
		   |        _                          /  R7
		   |      --+-- PUNCH OUT              \
		   +------o   o------------------------+
		   |   S8                              \  52
		   |        _                          /  R8
		   |      --+-- SET LOCATE             \
		   +------o   o------------------------+
		   |   S6                              \  69
		   |        _         _                /  R9
		   | STOP --+--     --+-- PLAY         \
		   +------o   o--+--o   o--------------+
		   |   S11       |        S12          \
		   |             |                     /  510
		   |             |                     \  R10
		   |             +---------------------+
		   |                                   \ 100
		   |        _                          / R13
		   |      --+-- REWIND                 \
		   +------o   o------------------------+
		   |    S9                             \ 100
		   |        _                          / R11
		   |      --+-- F FWD                  \
		   +------o   o------------------------+
		   |   S10                             \ 100
		   |        _                          / R12
		   |      --+-- REC                    \
		   +------o   o------------------------+
		   |                                   |
		   |             100                   |
		   +------------/\/\/\-----------------+
				 R14

   Button          Calc.     Measured	PCB button name
--------------------------------------------------------
1  Rehearse 	75 ohm    (76)		S5 All input
2  Auto loop	127 ohm   (127)		S1 Auto input
3  Loop end	179 ohm   (178)		S4 Auto 2>1
4  loop start	231 ohm   (229)		S3 Locate 2
5  locate 0	283 ohm   (279)		S2 Locate 1
6  punch in	335 ohm   (330)		S7 Locate 0
7  punch out	387 ohm   (381)		S8 Auto play
8  set locate	439 ohm   (432)		S6 Set locate
9  stop+play	498 ohm   (500)         S11+S12
10 rewind+play	598 ohm   (600)         S9+S12
11 ffwd+play	698 ohm   (700)         S10+S12
12 rec+play	798 ohm   (800)         S13+S12
13 play		908 ohm	  (900)         S12
14 stop         1008 ohm  (1000)        S11
15 rewind	1108 ohm  (1100)        S9
16 ffwd		1208 ohm  (1200)        S10
17 rec		1308 ohm  (1300)        S13
18 all open	1408 ohm  (1400)        -