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1SS 5, SECTION 501-164-201
$TABLE
H (Contd) 4
TROUBLE
ANALYSIS
–870A1
DIAL
TROUBLE
ADDITIONAL
POSIBLE
FAILURE
REMEDIAL
NUMBER
SYMPTOM
CAUSE
ACTION
9
Speakerphone
turns on
(BK) strap leads from
but adjunct
dial does
Disconnect,
insulate
and
screw terminals
11 and
store strap leads
not automatically
dial
23 on PSB were not
when memory
button
disconnected
when
is depressed
option
was wired
(wired for ONE-
TOUCH option)
Set automatically
dials
Precise dial tone not
1. Check CO line for
when screw terminals
11
present
or a defective
presence of precise
and 20 on PSB are tem-
dial tone detector
dial tone (350 Hz and
porarily
shorted
440 Hz)
2. If correct
dial tone is
present,
replace dial
tone detector
PWB
assembly
of D-180493
Kit of Parts
10
Delay time between
Defective
timing circuit
depression
of a memory
1. Replace
memory
2. Replace dial tone detec-
button
and initiation
of
tor PWB assembly
of
automatic
dialing ex-
D-180439
Kit of Parts
ceeds 3 seconds (wired
for ONE-TOUCH
option)
11
Cannot
turn speaker-
Speakerphone
turns off
Memory
button
de-
Depress RECORD
OFF
phone off
when OFF button
is de-
pressed when TIP and
button
and then depress
(wired for ONE-
pressed but turns on
RING not connected
speakerphone
OFF
TOUCH option)
when OFF button
is re-
to telephone
set
button
leased
(BK) strap lead from
Disconnect,
insulate and
terminal
18 on PSB was
store strap lead
not disconnected
when
option
was wired
Speakerphone
turns off
Defective
logic from
Replace memory
and stays off when
memory
(Y-BL) lead is discon-
nected from terminal
18
on PSB and OFF button
is depressed
Speakerphone
turns off
Defective
circuit on
Replace dial tone detec-
when handset
is taken
D-180493
Kit of Parts
tor board assembly
of
off-hook
but turns on
D-180493
Kit of Parts
when handset
is placed
on-hook
12
Automatic
dialing
Static discharge
damage
1. Replace memory
commences
for no
2. Consult
Telco
apparent
reason
engineer
for proper
(wired for ONE-
grounding
procedures
TOUCH option)
13
Adjunct
dials auto-
Noise on line
1. Add .05 pf capacitor
matically
but does not
between
PSB-21 and
wait for dial tone
PSB-26
(wired for ONE-
2. Remove above capacitor
TOUCH option )
and add resistor
(10kS2 —
50k Q) in series with
a G-R dial tone detector
input lead
Page 47
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