Panasonic KX-TD7895 - Digital Spread Spedtrum... User manual

ORDERNO. KMS0101535C1
F5
WIRELESS PHONE
KX-TD7895
(for U.S.A.)
SPECIFICATIONS
2001 Kyushu Matsushita ElectricCo., Ltd. All rights reserved.
Unauthorizedcopying and distribution isaviolation oflaw.

1. CAUTION
Note:
Whenyou mention the serial number, write downall 11 digits.
The serial numbermaybe found the label affixedto the bottom of the unit.
2. FORSERVICE TECHNICIANS
ICs and LSIs are vulnerable to static electricity.
Whenreplacing, the following precautions will helpprevent recurring malfunctions.
1. Covertheplasticparts boxes withaluminum foil.
2. Ground thesoldering irons.
3. Use aconductivemat on theworktable.
4. DonotgraspICor LSI pinswithbarefingers.
3. LOCATIONOF CONTROLS AND CONNECTION
3.1. HANDSET

3.2. CONNECTIONS OFHANDSET

3.3. BASE UNIT

4. DISASSEMBLY INSTRUCTIONS
4.1. BASE UNIT

1. Remove the fourscrews (A), and remove the
Bottom Cabinet.

2. Remove the MainBoardfrom the Top Cabinet.
3. Remove the twoscrews (B), and remove the RF
Unitfrom the MainBoard.

4. Remove the screw(C), and remove the Antenna
from the Top Cabinet.
Remove the Panel (LED)and the Button (Locate)
from the Top Cabinet.
4.2. HANDSET
1. Remove the BatteryCoversliding itinthe
direction of the arrow.

2. Take the Batteryout of the RearCabinetafter
disconnecting the Connector.

3. Remove twoScrews (D)from the RearCabinet.

4. Unfastenthe Top hook afterunfastening Both side
hooks to Front Cabinetfrom RearCabinet.
CAUTION:
Ifyou openthe front cabinettoo far, the Top hook
maysnap.
5. Remove three Terminal Plates from the Rear
Cabinet.

6. Remove the Antenna from the Front Cabinetafter
removing the Screw(E).

7. Remove the RFunitfrom the MainBoard.

8. Remove the MainBoardfrom the Front Cabinet.
5. ADJUSTMENTS (HANDSET)
5.1. EQUIPMENT
1. Radiotester:Marconi Model 2295Aor later.
2. DC PowerSupply, capableof3.9V DC supplyat 2A.
3. AudioCable:BNC end toalligator clipend.
4. Soldering Iron, solder, and varioustools.
5. ACvoltmeter:AvailableReadoutrangeis-40dBmto0dBm.
5.2. ADJUSTMENTPREPARATIONS
Referto HandsetReference Drawing forconnection and testpoint locations.
1. Unscrewboth2screwsfrom rearcabinet.
2. Removetherearcabinet from frontcabinet.
3. Connect DC powersupply(3.9V)tomainboard (test pointVBAT

and GND).
4. Connect adistortion meter(withACvoltmeter)totheSPK
terminals(SP+) on thehandset.
5. ToEntertheTest Mode
(1)Connectserial cable to mainboard. (TX, RX, GND, 3points)
(2)Connectotherside of serial cable to serial portof PC. (Dsub-9pins connector)
(3)Startup the “Procomm plus“and use the script file. [file name :TD7895.WAX]
(4)Please use Following Commands.
-Test StartRequest Commands.
-I/O Setting Request Commands.
Codec
Setting
:Loop Back
:TransmitON
:Receiving OFF
5.3. ADJUSTMENTPROCEDURE
Symptom Remedy
Speakerlevel of handsetis low. Adjustadjustment item(A), (B).
Transmission sound is low. Adjustadjustment item(A), (B).

Item Adjustment Item Procedure
(A) Codec Input Level
Adjustment AdjustCodec Input Level (Testpoint :CDC-IN)to - 12dBmbyVR300.
(B) SpeakerOutput Level
Adjustment AdjustSpeakerOutput Level (Testpoint :SP+)to - 28dBmbyVR301.
6. CPUDATA
6.1. BASE UNIT{IC107(CPU)}
Pin Description I/O High High-Z Low
1/RES I NORMAL -RESET
2 XTAL I - - -
3EXTAL O - - -
4MD1 I NORMAL - -
5MD0 I - - -
6 NMI I NORMAL -NORMAL
7/STBY I NORMAL - -
8VCC2 VDD - - -
9LPR SCK I - - -
10 LPR RXD I - - -
11 Not USE I - - -
12 VSS GND - - -
13 Not USE I - - -
14 CODEC MCLK O - - -
15 Not USE O - - -
16 Not USE O - - -
17 Not USE O - - -
18 Not USE O - - -

Pin Description I/O High High-Z Low
19 Not USE O - - -
20 Not USE O - - -
21 Not USE I - - -
22 Not USE I - - -
23 Not USE I - - -
24 Not USE I - - -
25 Not USE I - - -
26 TEST I NORMAL - -
27 POWER DOWN I NORMAL -POWER
DOWN
28 BBIC INT I NORMAL -INT
29 AVCC VDD - - -
30 Not USE (JP1) I - - NORMAL
31 Not USE (JP2) I - - NORMAL
32 Not USE I - - NORMAL
33 Not USE I - - NORMAL
34 Not USE I - - NORMAL
35 Not USE I - - NORMAL
36 Not USE I - - NORMAL
37 Not USE I - - NORMAL
38 AVSS GND - - -
39 LPR TX O - - -
40 CONT I - - -
41 LPR CLK O - - -
42 LPR RESET O - - -
43 ACK RX I - - -
44 ACK TX O - - -
45 LINEMUTE O MUTE - -
46 HOOK O OFF
HOOK - ON HOOK
47 VCC1 VDD - - -
48 PULSE/TONE I PULSE - TONE
49 EMSS/SLT I SLT - EMSS
50 LOCATOR I NORMAL -ON
51 CODEC PWR
DWN OON - OFF
52 CODEC DEN O - - -
53 CODEC SCK O - - -
54 CODEC RXD I - - -
55 CODEC TXD O - - -
56 VSS GND - - -
57 INUSE LED O OFF - ON
58 POWER LED O OFF - ON

58
POWER
LED
O
OFF
-
ON
Pin Description I/O High High-Z Low
59 BBIC_PWRDWN OPWRDWN - -
60 BBIC_DEN O - - -
61 BBIC_ALE O - - -
62 BBIC_SCK O - - -
63 BBIC_RXD I - - -
64 BBIC_TXD O - - -
65 LCD CNT0 O NORMAL -RESET
66 LCD CNT1 O - - -
67 LCD CNT2 O NORMAL -WRITE
68 LCD CNT3 O NORMAL -CHIP
SELECT
69 LCD DAT4 O - - -
70 LCD DAT5 O - - -
71 LCD DAT6 O - - -
72 LCD DAT7 O - - -
73 VSS GND - - -
74 EEPOROM_CS O SELECT - -
75 EEPROM_SCK O - - -
76 EEPROM_SI O - - -
77 EEPROM_SO I - - -
78 Not USE
(EXT_RXD) O - - -
79 Not USE
(EXT_TXD) I - - -
80 EXT_CLK O - - -
6.2. HANDSET{IC307(CPU)}

Pin Description I/O High High-Z Low
1/RES I NORMAL -RESET
2 XTAL I - - -
3EXTAL O - - -
4MD1 I NORMAL - -
5MD0 I - - NORMAL
6NMI I NORMAL - -
7Not USE (/
STBY) INORMAL - -
8VCC2 VDD - - -
9Mic MUTE I Mic ON - Mic ON
10 RFPOWER I RFON - RFON
11 VIBRATOR I ON - OFF
12 VSS GND - - -
13 BACK LIGHT O OFF - ON
14 32.768kHzIN I - - -
15 KEY-OUT5 O - - STROBE
ON
16 KEY-OUT4 O - - STROBE
ON
17 KEY-OUT3 O - - STROBE
ON
18 KEY-OUT2 O - - STROBE
ON
19 KEY-OUT1 O - - STROBE
ON
20 KEY-OUT0 O - - STROBE
ON
21 KEY-IN1 I - - KEYON
22 KEY-IN2 I - - KEYON
23 KEY-IN3 I - - KEYON
24 KEY-IN4 I - - KEYON
25 KEY-IN5 I - - KEYON
26 CODEC
POWER DOWN OON - OFF
27 POWER DOWN I NORMAL -POWER
DOWN
28 BBIC INT I NORMAL -INT
29 AVCC VDD - - -
30 JP1 I NORMAL - -
31 JP2 I 7894 - 7895
32 POWER_SW I ON - OFF
33 HEADSET I HEADSET -NORMAL
34
CHARGE
I
ON
-
OFF

34
CHARGE
I
ON
-
OFF