Panasonic KX-T7730CA Manual de usuario
© 2008 Panasonic Communications Co., Ltd. All
rights reserved. Unauthorized copying and distribu-
tion is a violation of law.
ORDER NO. KMS0804481CE
Proprietary Telephone
Model No. KX-T7730CA
(for Kazakhstan, Uzbekistan, Kyrgyzstan, Tajikistan
and Turkmenistan)
2
KX-T7730CA
TABLE OF CONTENTS
PAGE PAGE
1 Safety Precautions ------------------------------------------- ---3
1.1. For Service Technicians ----------------------------- ---3
2 Warning ---------------------------------------------------------- ---3
2.1. About Lead Free Solder (PbF: Pb free) ---------- ---3
3 Specifications -------------------------------------------------- ---4
4 Technical Descriptions-------------------------------------- ---5
4.1. Block Diagram ------------------------------------------ ---5
4.2. Circuit Operations-------------------------------------- ---6
5 Location of Controls and Components---------------- -13
6 Installation Instructions------------------------------------- -14
6.1. Connection----------------------------------------------- - 14
7 Troubleshooting Guide-------------------------------------- -15
7.1. No Operation -------------------------------------------- - 15
7.2. Handset Trouble---------------------------------------- - 16
7.3. Speaker-Phone Trouble ------------------------------ - 17
7.4. TONE Dial Trouble------------------------------------- - 17
7.5. The Electronic Volume of the Speaker-Phone
Does Not Work-------------------------------------------- 18
7.6. The Electronic Volume of Handset Does Not Work18
8 Disassembly and Assembly Instructions ------------- -19
9 Miscellaneous-------------------------------------------------- -21
9.1. Terminal Guide of ICs, Transistors and Diodes- - 21
9.2. How To Replace a Flat Package IC --------------- - 22
9.3. Memo------------------------------------------------------ - 23
10 Schematic Diagram------------------------------------------- -24
11 Printed Circuit Board ---------------------------------------- -26
11.1. Component View --------------------------------------- - 26
11.2. Bottom View --------------------------------------------- - 27
12 Appendix Information of Schematic Diagram ------- -27
13 Exploded View and Replacement Parts List --------- -28
13.1. IC1 --------------------------------------------------------- - 28
13.2. Cabinet and Electrical Parts Location------------- - 30
13.3. Accessories and Packing Materials --------------- - 31
13.4. Replacement Parts List------------------------------- - 32
3
KX-T7730CA
1 Safety Precautions
1.1. For Service Technicians
• Repair service shall be provided in accordance with repair technology information such as service manual so as to prevent fires,
injury or electric shock, which can be caused by improper repair work.
1. When repair services are provided, neither the products nor their parts or members shall be remodeled.
2. If a lead wire assembly is supplied as a repair part, the lead wire assembly shall be replaced.
3. FASTON terminals shall be plugged straight in and unplugged straight out.
• ICs and LSIs are vulnerable to static electricity.
When repairing, the following precautions will help prevent recurring malfunctions.
1. Cover plastic parts boxes with aluminum foil.
2. Ground the soldering irons.
3. Use a conductive mat on worktable.
4. Do not grasp IC or LSI pins with bare fingers.
2Warning
2.1. About Lead Free Solder (PbF: Pb free)
Note:
In the information below, Pb, the symbol for lead in the periodic table of elements, will refer to standard solder or solder that con-
tains lead.
We will use PbF when discussing the lead free solder used in our manufacturing process which is made from Tin, (Sn), Silver,
(Ag), and Copper, (Cu).
This model, and others like it, manufactured using lead free solder will have PbF stamped on the PCB. For service and repair
work we suggest using the same type of solder.
Caution
• PbF solder has a melting point that is 50°~ 70°F, ( 3 0°~ 40°C) higher than Pb solder. Please use a soldering iron with tempera-
ture control and adjust it to 700°± 20°F, ( 3 70 °± 10°C).
Exercise care while using higher temperature soldering irons.:
Do not heat the PCB for too long time in order to prevent solder splash or damage to the PCB.
• PbF solder will tend to splash if it is heated much higher than its melting point, approximately 1100°F, (60 0 °C).
• When applying PbF solder to double layered boards, please check the component side for excess which may flow onto the
opposite side (See figure, below).
2.1.1. Suggested PbF Solder
There are several types of PbF solder available commercially. While this product is manufactured using Tin, Silver, and Copper,
(Sn+Ag+Cu), you can also use Tin and Copper, (Sn+Cu), or Tin, Zinc, and Bismuth, (Sn+Zn+Bi). Please check the manufac
turer's specific instructions for the melting points of their products and any precautions for using their product with other
materials.
The following lead free (PbF) solder wire sizes are recommended for service of this product: 0.3mm, 0.6mm and 1.0mm.
4
KX-T7730CA
3 Specifications
Item Outline Specification
Station Loop Limit 40 ohms
Cabling Method 2 pair wire
Jacks Handset Jack, TEL Jack, Headset Jack
Display 16 digits (max.)
Dimensions 183 mm (W) x 107 mm (H)x218 mm (D) with handset (Low Angle)
183 mm (W) x 130 mm (H) x 207 mm (D) with handset (High Angle)
Weight 0.8 kg
5
KX-T7730CA
4 Technical Descriptions
4.1. Block Diagram
USD PRIVING
CIRCUIT
(Q105~108)
H
L
T
R
T2
POWER
REGULATOR
(IC7)
SIGNAL
TRANSMITTING
CIRCUIT(Q101)
SIGNAL
RECEIVING
CIRCUIT(Q102)
FF
(IC2)
RESET IC
(IC9)
Vcc
CPU
(IC1)
X1
DRIVING
CIRCUIT
(Q103,Q104)
LED
LCD
KEY
LCD Module
RINGER
DTMF
SPEAKER
MIC
HEADSET
HANDSET
SP-PHONE
(IC3)
Handset Amp
(Q5,Q8)
Pre Amp
(Q4)
HYBRID
CIRCUIT
(Q3)
DIODE
BRIDGE
(D1)
DIODE
BRIDGE
(D2)
T1
KX-T7730CA MAIN BOARD
6
KX-T7730CA
4.2. Circuit Operations
4.2.1. KEY Input Control Circuit
Sequential input information is executed by dynamic scanning.
The ports R20-R23, R30, R31 of IC1 are brought to high status consecutively.
If a key is pressed, the key-in information input is executed by ports R00-R03, R10-R13.
7
KX-T7730CA
4.2.2. LED Circuit
Circuit Operation:
The LED executes dynamic lighting for the status indicators, and control is executed by the output ports R20-R23, R60-R63,
R70-R73.
8
KX-T7730CA
4.2.3. Data Communication Circuit
Function:
The data communication circuit serves the following functions:
Information exchanger between the PBX and proprietary telephone, key input information as well as data for the LED control,
LCD control, etc. This information is continuously exchanged at all times.
Circuit Operation:
When the proprietary telephone receives an IRQ signal from the PBX and after sending the key input information (19 pulses) to
the PBX and receiving data (47 pulses) for the LED control, etc., the proprietary telephone will return to the PBX an acknowl-
edge signal.
1. Reception
The data from the PBX is received via the H and L lines along the path shown below.
H, L Line →D2 →T2 →R106 →Q102 →IC2 →IC1 Pin 18
2. Transmission
The data to the proprietary telephone is transmitted along the following path.
IC1 Pin 16 →IC2 →Q101 →T2 →D2 →H, L Line
9
KX-T7730CA
4.2.4. TONE Generation Circuit
Function:
This circuit generates all system tones including COL, extension, busy, DTMF signals and key in confirmation tones during the
power failure mode and is comprised of IC1(DTMF Generator) and IC5 (Analog Switch).
Circuit Operation:
For an output of a single row tone, the row terminal and the each column terminals intersecting with it are required to be brought
a low state. For a dual tone output, one row terminal and one column terminal are brought to low state.
CONDITION IC1 pin52 IC5 SWA IC1 pin53 IC5 SWB IC1 pin54 IC5 SWC IC1 pin55 IC5 SWD
Ringing LOFFLOFFLOFFH ON
Call Waiting L OFF L OFF H ON L OFF
Tone Dial (Handset) H ON H ON L OFF L OFF
Tone Dial (Speakerphone) H ON L OFF H ON L OFF
10
KX-T7730CA
4.2.5. Handset Circuit
1. Transmission Signal Path
The input signal for the handset microphone is sent through the telephone line via the following path:
Handset MIC(JK2) →JK3 →C24 →R26 →C34 →Q5 →C21 →R21 →Q3 →C4 →T1 →C3 →Q1 →D1 →Telephone
Line
2. Reception Signal Path
The input signal from the telephone line is sent to the receiver through the following path:
Telephone Line →D1 →Q1 →C3 →T1 →C4 →Q3 →R10 →C8 →R12 →Q4 →C26 →R32 →IC10 →C32 →R34 →
C27 →R208 →Q8 →C31 →JK3 →JK2 →Handset Speaker
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