NSD–1
Disassembly / Troubleshooting Instructions
PAMS Technical Documentation
Page 12
Issue 2 09/00
Nokia Mobile Phones Ltd.
Conversely, if the transmit audio is not working, the fault could be any-
where in the transmit path. Check the following:
Check microphone contacts.
Microphone bias.
Tx voice data is transferred from CAFÉ to MAD4 on CAFESIO (1). CAFE-
SIO (2) must also be active. Tx voice data is then sent back to CAFÉ on
the TXD bus (See schematic). See the Baseband section of the Service
Manual for more detail on RXD bus usage.
Tx voice data is then sent to RF on the TXIQ bus (CDMA) or AMPSMOD
(AMPS).
Test Point Desig-
nator
Signal Name
General
Characteristics
General Signal Destination
31
SleepClock
32.768 KHz typical Square waveform
From CCONT to MAD4
25
Clk19m20
19.2 MHz Square waveform
From CAFÉ to MAD4
23
Clk19M2rf (D201–25)
19.2 MHz Sinusoidal waveform
From RF Synthesizer to CAFÉ and other RF Synthesiz-
ers
24
Clk9m8
9.8 MHz Square waveform
From CAFÉ to MAD4
36
CRB
32Khz – 2.8V
From 32K crystal to CCONT
14
MemRdX
0 / 2.8 V (active low)
From MAD4 to Flash and RAM output enables
15
MemWrx
0 / 2.8 V (active low)
From MAD4 to Flash and RAM write enables
13
ROM1SelX
0 / 2.8 V (active low)
From MAD4 to Flash chip enable
5
Clk_En
0 / 2.8
From MAD4 to FLASH, CCONT and CAFE
1
PurX ( D101–116 )
0 / 2.8 V (active low)
From CCONT to MAD4
35
WdDisX
2.8 V (active low)
CCONT test point for phone diagnosis mode
34
PwrOnX
0 / 2.8 V (active low)
From UI Power Key to MAD4 and CCONT
33
ResetX
0 / 2.8 V (active low)
From MAD4 to CAFE
30
Vbat
3.1 – 4.1 V valid battery range
(3.1 – 5.2 with charger connected)
From Battery connector to CCONT and other various
parts of phone
3
Vbb
2.8 V typical (2.7 – 2.87 V)
From CCONT to MAD4 and Memories
2
Vmad
N / A
From CCONT to MAD4
11
Vr1
2.8 V typical (2.67 –2.85 V)
From CCONT to 19.2MHz VCTCXO
12
Vr1_Sw (MIC bias)
0 / 2.75V
From CCONT to V201 to CAFE
40
Vr2
0 / 2.8 V typical (2.67 –2.85 V)
From CCONT to CELL Receiver
38
Vr3
0 / 2.8 V typical (2.67 –2.85 V)
From CCONT to RF Receiver
4
Vr4
2.8 V typical (2.67 –2.85 V)
From CCONT to PCS Transmitter
39
Vr5
0 / 2.8 V typical (2.67 –2.85 V)
From CCONT to CELL Transmitter
10
Vr6
2.8 V typical (2.67 –2.85 V)
From CCONT to CAFE
41
Vr7
0 / 2.8 V typical (2.67 –2.85 V)
From CCONT to RF Synthesizer
9
Vr7a
0 / 2.8 V
6
Vref
1.251 typical (1.244 – 1.258)
From CCONT to CAFE
16
+5_Power (V5V)
5 V typical (4.8 – 5.2 V)
From CCONT to CELL and PCS Transmitters
7
3V_5V (VSIM)
0 / 2.8 – 3.2 V
From CCONT to Flash
18
P1
0 / 2.8 V typical (2.7 – 2.85)
From PENTA to CELL Synthesizer
17
P2
0 / 2.8 V typical (2.7 – 2.85)
From PENTA to AMPS Receiver
19
P3
0 / 2.8 V typical (2.7 – 2.85)
From PENTA to PCS Synthesizer
21
P4
0 / 2.8 V typical (2.7 – 2.85)
From PENTA to CELL Receiver
22
P5
0 / 2.8 V typical (2.7 – 2.85)
From PENTA to PCS Receiver
43
V_in
ACP–7: 3.5VAC(rms) to 8.5VAC(rms)
ACP–9 : 4.3VDC to 8VDC
From Bottom Connector to CHAPS
Note: Lower VBAT = lower Vin levels
44
L_Gnd
0V
From Bottom Connector, through an inductor to Phone
Ground
45
V_in
ACP–7: 3.5VAC(rms) to 8.5VAC(rms)
ACP–9 : 4.3VDC to 8VDC
From Bottom Connector to CHAPS
Note: Lower VBAT = lower Vin levels
46
Chrg_Ctrl
0 / 2.8 V
From MAD4 to CHAPS
47
Chrg_Ctrl
0 / 2.8 V
From MAD4 to CHAPS
