Sony SPP-874, Service Manual, Page: 12 / 38

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SECTION 3
TEST MODE
BASE UNIT SECTION
MANUAL TEST MODE
Set the Test Mode:
1. Set the DIAL MODE switch to “P” (pulse).
2. While pressing the HANDSET LOCATOR key, insert the AC
adaptor (Reset start).
3. With the HANDSET LOCATOR key still held down, switch
the DIAL MODE switch “T” (tone) n “P” (pulse).
4. When the HANDSET LOCATOR key is released, test mode
starts.
5. The LEDs POWER , LINE and CHARGE light on one after
another with a 0.5 sec interval in this order. When all of them
are on, they will light off in 1 sec.
Firstly, “0” will be dialled out at 10 pps. Then “1”, “4”, “8”
and “#” will be sent out by DTMF.
6. Set to TX ON. Goes to external line state in 1 CH. (LINE LED
light on)
Release the Test Mode:
1. Pull out the AC adaptor or turn off the power.
MACHINE TEST MODE
Set the Test Mode:
1. With the TEST I/O (TP808) terminal in “L” (low) input state,
cause Reset of Power ON. Equipment enters machine test mode.
2. With the timing of marking the TEST I/O terminal “H” (high)
100 ms after the power is turned on, use the TEST CLK and
COL1-4 information to set up.
3. ON/OFF of TX is according to the input logic of the DIAL
MODE terminal.
Release the Test Mode:
1. Pull out the AC adaptor or turn off the power.
2. Remove the short plug and turn on the power again.
– base main board (conductor side) –
TP804
TP811 TP812
TP808 TP809 TP807 TP806 TP805
TP813
TP814