Text preview for : SF_CD920930_A3_C_L3_V12.pdf part of Motorola CD920 Service Manual Phone Gsm (Tot. 11 File) - Part 2/2
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a
e
c
LOGIC_*GSM_DCS
GSM_*DCS
*GSM_DCS
TX VCO Tuning Voltage
LOGIC_GSM_*DCS
Page 1
g U704 EPROM
N 4 6 5 1 4 Q 1 7 P 2 O
1
8 8
SH9
5
SH5
TP16
RX SIGNAL PATH TX SIGNAL PATH MAIN VCO SIGNAL PATH TUNING VOLTAGES 13 MHz REFERENCE CLOCK TESTPOINTS FROM FULL SCHEMATICS TESTPOINTS FROM BLOCK DIAGRAM
U701 CALL PROCESSOR U702 SRAM
M7
4
1
TP x
x
5 8 J500 1 DP_EN KEY7 KEY3 KEY4 KEY2 A0 NC R_W KEY8 D0 *RESET SIZ1 PWR_SW D1 GND D2 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 NC B+ GND D3 KEY6 D4 *DP_ON_OFF D5 GND D6 KEY5 D7 GND BL_CNTL L275 -10V A B C D E F G H I J K L M N O P Q R S 28 T U V W
U340 PAC f
8 14 14 8
Amplified RX Signal Amplified RX Signal RX IF 215MHz RX I Signal RX Q Signal Analog RX Signal Amplified Analog RX Signal Analog TX Mic Signal Analog TX Mic Signal Amplified Analog TX Mic Signal TX Q Signal TX I Signal TX IF Frequency DCS/GSM 120/170MHz TX VCO Signal TX VCO Feedback Signal TX Exciter via Shift Level TX Exciter Signal Main VCO Tuning Voltage Main VCO Feedback Line DCS Main VCO Signal GSM Main VCO Signal AFC Tuning Voltage 13_DCLK_B
2 3 4
ALERT
+
U370 TIC
1 4 7
SH11
5 6 7 D RX_I RX_Q E 23 22 8 9 10 14 1
LOUDSPEAKER
G
SH6
M R
K
26TX_Q 29 TX_I
VOICE ANNOTATION
11 J I 12 13 14 15 16 H
L
TP15
U T C S W
V
38 40 45
49
SH7 SH8
B A F
15
SH13
RX275
SW_VCC RX275
SF_OUT MDM_ANA_VCC b
Main VCO Tun. Volt. DOWNLINK
U980
U500 SMOC
L500 SIM_5V
R275 V_SWITCH
L275 R475
V_SWITCH EXT_B+
Dual Band _ZAP_P14
RX275
RX Local Osc Tun. Volt. h
B U
TX Local Osc Tun. Volt. i
T A V
TP78 TP77 TP52 TP76
SH14 SH3
W
k
C 31
U703 BIC
S 26 23 17 R 37
TP79
SH12
I
U220
GIF_SYN TP1 TP2 TP3 TP4 TP5 TP6 37 13_DCLK_B M7 40 TP7 TP8 TP11 TP12 TP13 TP14 TP15 TP16 TP18 TP51 TP52 TP71 TP72 TP73 TP74 TP75 TP76 TP77 L275 GND GND
Bootcode TP´s
Y702 U900 GCAP
J600 15 1 2 3 H 4 5 6 7 8 F 9 10 11 12 2 13 14 15
10 PIN EXT.CONN.
CLK_13IN 59 17
41 43 46RXI 48 RXQ E
U220 GIF_SYN
TXQ TXI
TP13
10 6 4
28
15
J
9 10 19 21
GND SW_RF GND BATT_FDBAK MAN_TEST RS232_TX RS232_RX AUDIO_IN AUDIO_OUT GND UPLINK DOWNLINK DSC_EN_B EXT_B+ GND
U703
BIC
*RESET BKPT FREEZE IFETCH IPIPE L_BATT+ RX TX ANT_SIGNAL TX LOCAL OSC TUNING RX LOCAL OSC TUNING MAIN VCO TUNING TX VCO TUNING WDOG *DM_CS SVREG2 *ROM1CS *RAM1CS *RAM2CS *BIC_CS *ROM2CS NCO SIN1 S_NO SOUT0
J900 SIM_CONNECTOR
TP14
57 59 61 63 K L
M
D
U705 EEPROM
J900 1 2 3 4
SIM INTERFACE
G
U701
CPU
U500
SMOC
GND SIM_5V SIM_VPP *SIM_RST SIM_I_0 SIM_CLK_B
P 1 1 2 3 4 16 15 14
5 6
U301 IPA
10 9
5
4
j
TP11
1
5 7 8
TP12
4 8 2 1 O
SH4
8 1
1 1
14
SH1
SH2
N
7
8
TP78 TP79
Q
TP75 TP3 TP7 TP8 TP18 TP51 TP71 TP2 TP4 TP1 TP6 TP5 TP74 TP72 TP73
EUROPE MIDDLE EAST & AFRICA CUSTOMER SERVICES LEVEL 3 COLOUR SIGNAL FLOW
28:08.98
Rev. 1.2
V_SWITCH
SW_B+
B+
L_BATT
B+
Dual Band_Zap *RESET L275 WDOG *DM_CS *ROM2CS *ROM1CS *BIC_CS *RAM1CS *RAM2CS Ralf Lorenzen, Michael Hansen, Colin Jack, Billy Jenkins Page1