Multitone RPR 563GS, Техническое руководство

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RPR 563GS/KGS
TM1187A Issue C Page 5 - 18
STEP TEST POINT REMARKS
1 TR110(e) B+ 3.6V DC
2 TR110(c) SWB+ 3.6V DC
3 TR131(c) 1.64V DC
4 TR108(c) 4.5V 5.0V ±0.5V
5 IC101 PIN 33 3.3V - 4.3V DC
6 IC106 PIN 2 SPEECH3V AUDIO CIRCUIT 3.6V
7 IC105 PIN 3 CLK GATE ARRAY CLOCK 32.768kHz
8 IC105 PIN 5 RESB 0 - 3.6V SWITCH ON
9 IC105 PIN 76 SCK INTERRUPT 120µs PULSE
10 IC105 PIN 68 TMI 120µs EVERY 2s
11 IC105 PIN 67 SW1 SWITCH ACTIVITY
12 IC101 PIN 38 XL102 µP CLOCK (EVERY 60ms) 3.58MHz
13 IC105 PIN 26 E TRANSFERS DATA
14 IC105 PIN 9 BEC `0' ENABLES RADIO
15 IC105 PIN 42 TSF TONE `ON' ICON
NOTE: = Falling edge of output signal.
Measurements are made with x10 oscilloscope probe.
Table 3: Decoder Circuit Detailed Test Sequence
Decoder Faults
17. If the Decoder PCB is suspect, proceed as follows:
a) Remove the case back.
b) Separate the two PCBs and connect them via the 14-way lead (supplied with the
P654).
c) Place the two PCBs on an anti-static mat. Connect a fully-charged battery pack and
switch on.
d) With a x10 probe connected to the oscilloscope, measure points 1 to 15 in Table 3.
e) Compare the resultant waveforms with those in Figure 11.
NOTE: It will be necessary to remove the Decoder PCB screen to gain access to
test points.