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|  TM 11-5820-670-30
2-26. TROUBLESHOOTING CHARTS. (CONT)
CHART 2-24
Control Unit Troubleshooting
(Sheet 4 of 12)
CONTROL UNIT RESISTANCE TABLES
The charts in this section list resistance readings that should be observed at each pin of J9101 for each
control position. All measurements are made with the ME-26D/U. Resistances are in ohms. VOL
control R9103 is set fully clockwise; all other switches are set as indicated.
MODE SWITCH at OFF, SQUELCH switch at DIS, and frequency selectors at 30.00.
TO PIN
RESISTANCE
FROM PIN
m,BB,LL,J,j,L,z,g,R,S,T,X,
FF,HH,MM,NN,t,s,q,v,u,JJ,
Inf
All other pins
PP,y,x,w,d,c,B,A,a,Y,E,D,C
DD
27 k
GG
N
163 (VOL fully clockwise)
KK
f
0
e
0
F
f
0
Ground
b
0
Z
b
0
Ground
V,k,cc,G,M,AA,H,P,U
MODE SWITCH at OFF and SQUELCH switch at CARR or TONE.
TO PIN
RESISTANCE
FROM PIN
Inf
Ground
V
Ground
0
Z,b
Y,C,D,E,a,A,B,C,d,w,x,y,
PP,JJ,u,v,q,s,t,NN,MM,
All other pins
HH,FF,X
Inf
DD
27 k
GG
N
163 (VOL fully clockwise)
KK
f
0
e
F
0
f
2-117
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