Test Mode; Base Unit Test Mode A - Sony SPP-A9171 Service Manual

4-1.

BASE UNIT TEST MODE A

Manual System Test Mode
[Start-up]
1. Set the DIAL MODE switch to P (PULSE), and turn on the
power while pressing the MEMO ANSWER BOX3 key.
2. Select the test mode "11" from the test mode idle state using the
VOLUME +/– keys. Press the "ANSWER" key and the system
enters the test mode "11" [TEST MODE idling A].
3. In test mode idling A, pressing the HANDSET LOCATOR key
with the P (PULSE)/T (TONE) switch set to P (PULSE) state
switches to BASE UNIT TEST MODE A-1.
DIAL MODE switch
P (PULSE) side
T (TONE) side
[Charge Detection and ART0 Output Test]
1. Detects that the charge detection terminal IC501 Pin @∞ (PARKP)
has turned from H to L, and outputs a square waveform signal
(2.4 kbps) from the ARTO terminal.
2. Clears the EEPROM contents at the same time.
[Charge Control Test]
1. When the IC501 Pin wg input (PAEKP) changes from L, H, to L
during charge detection, the IC501 Pin !¶ output (CHRG_CTL)
will output H, L to H only once.
4-1-1. BASE UNIT Test Mode A-1
1. In test mode idling A and the P (PULSE)/ T (TONE) switch set
to the P (PULSE) state, pressing the HANDSET LOCATOR
key changes the mode as shown below.
2. Setting the P (PULSE)/ T (TONE) switch from P (PULSE) to T
(TONE) in the BASE UNIT test mode A-1 in any time also
enables the mode to be changed to the BASE UNIT test mode
idling A.
• This mode is intended for checking that the IC501 line is operat-
ing properly. Add the LINEIN signal and check that the signal is
output to the SPEAKER OUT.
HANDSET
LOCATIOR
button
pressing
count
1 CODEC Forward Loopback (L1)
Line: Talking state
(
(CODEC LINE IN n SPEAKER OUT)
2 ADPCM Forward Loopback (L2)
Line: Talking state
(
(CODEC LINEIN n ADPCM
n CODEC SPERKER OUT)
3 ADPCM n RF Loopback (
(CODEC LINEIN n ADPCM n RFn ADPCM
n CODEC SPERKER OUT)
4
Returns to BASE UNIT TEST MODE • IDLING A
Note: If the LEDs are lit due to the idling state test, clear all the
LEDs, and return to the idling state.
Idle status
Test Mode Idle A-1
Test Mode Idle A-2

Test mode

)
)
Line: Talking state
SECTION 4
TEST MODE
[Base Set AUDIO Input/Output Level test
[ADPCM Forward Loop Back (L2) Mode]]
Audio analyzer
F.B.
MJ101
GND (TP122)
TP903
Base main board (conductor side)
Setting:
Setting: OSC=–13.0 dBV (Open terminal)
MOD=1 kHz
TP903 (L OUT)=0.4 dBV
)
— 21 —
osc out
TRUNK
TP121
• Short: TP121 GND (TP121)
Level meter