Sony SPP-M100, Service Manual

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3. Line test
3-1. L1/L2 dial test
If the Test L1/L2 Port (IC501
!ª
pin) is high, L1 is connected,
if it is low, L2 is connected, then dial transmission is ex-
ecuted.
The dialing is sent to the connected line in the order “P”
(Pulse) mode
n
-
n
“T” (Tone) mode
n
1
n
4
n
8
n
[#]
.
3-2. L1/L2 parallel detection
When parallel DET ON is detected for the connected line,
the
[LINE 2]
LED lights up and after detection, when paral-
lel DET OFF is detected, the
[LINE 2]
LED goes out after
500 msec.
The
[LINE 2]
LED goes out when the line test is complete
and for L1/L2 dial test shifting.
3-3. L1/L2 ring detection
The
[LINE 1]
LED only lights up if the ring DET ON is de-
tected for the line that is not connected and when the ring
goes off, the
[LINE 1]
LED goes out.
3-4. Third-party communications test
If the
[DIAL MODE]
switch is set to “T” (Tone) during the
line test, L1/L2 is connected with the third-party communi-
cations audio path without channel change and TX off.
This state is retained until the
[PAGE]
key is pressed.
3-5. Shifting to L1/L2 dial test
The machine is shifted to the L1/L2 dial test by switching
the Test L1/L2 port (IC501
!ª
pin) high/low during line test-
ing. During an L1 connection, if low is detected, the ma-
chine shifts to L2 dial testing and during an L2 connection,
if high is detected, the machine shifts to L1 dial testing.
3-6. Line test end
Pressing the
[PAGE]
key during line testing ends the line
test. The dial pulse 0 is send on the connected line in “P”
(pulse) mode and the machine shifts to the wireless test.
SQ DET CHARGE DET
DIAL DATA
( I C 5 0 1
@ ™
p i n ) ( I C 5 0 1
7
p i n )
H H 8
L L 1
4. Wireless test
4-1.
[PAGE]
key processing
The channel is incremented only in manual test mode. Chan-
nel incrementing is carried out in 25channel mode.
Incrementing follows the sequence CH1
n
CH2
n
• • • •
n
CH24
n
CH25
n
TI
n
T2. (See the channel setting table.)
4-2. Message transmission/reception test
4-2-1. When the ID = 3AA, Data = AAA message is received,
a message with the same contents is returned.
4-2-2. If 1 data is received 10 times in a row, the
[LINE 1]
LED
lights up. After such data is received, the
[LINE 1]
LED
stays on until the power is switched off.
4-3. Continuous message transmission test
During L1 connection, when L2 Ring DET ON is detected
and during L2 connection, when L1 Ring DET ON is de-
tected, the test message is transmitted continuously. The
transmitted message is the command frame, ID = 3AA, Data
= AAA. (The current transmission interval is 40 msec.)
4-4. Monitor output
When the
[DIAL MODE]
switch is set to “T” (Tone), the states
of the input pins below can be monitored by sending dial
data at 500 msec intervals.
Monitor output input pins
SQ DET (IC501
@™
pin) H : SQ present
CHARGR DET (IC501
7
pin) L : Charge On
Output data
4-5. LINE 1/LINE 2 connection switching
During the wireless test, the LINE 1/LINE 2 connection can
be switched by switching the Test L1/L2 port (IC501
!ª
pin)
high/low.
If low is detected during LINE 1 connection, the connection
switches to LINE 2. If high is detected during LINE 2 con-
nection, the connection switches to LINE 1.
4-6. During the wireless test, 4-1 to 4-5 above are constantly
monitored.
4-7. SQ detection display
When the
[DIAL MODE]
switch is set to “P” (Pulse), the
[LINE 2]
LED is on when there is SQ and is off when there
is no SQ.