Panasonic KX-TS550MEB User manual

© 2007 Panasonic Communications Co., Ltd. All
rights reserved. Unauthorized copying and
distribution is a violation of law.
KX-TS550MEB
KX-TS550MEW
Integrated Telephone System
Black Version
White Version
(for Mexico)
Telephone Equipment
ORDER NO. KM40706334CE

1 ABOUT LEAD FREE SOLDER (PbF: Pb free) 3
1.1. Suggested PbF Solder 3
2 FOR SERVICE TECHNICIANS 4
3 CAUTION 4
4 LOCATION OF CONTROLS 5
5 SETTINGS 6
5.1. Connection 6
6 OPERATIONS 7
6.1. Making Calls 7
6.2. Answering Calls 7
7 SPECIAL FEATURES 7
7.1. For Call Waiting Service Users 7
7.2. Temporary Tone Dialing (For Rotary or Pulse Service
Users) 7
8 DISASSEMBLY INSTRUCTIONS 8
9 TROUBLE SHOOTING GUIDE 9
9.1. Service Hints 9
9.2. Pulse Dialing Problems 9
9.3. Problems With the Handset 10
9.4. Tone Dialing Problems 10
9.5. Problems With Ringer 11
9.6. How to Check the IC1 (Scanning to the key) 12
10 BLOCK DIAGRAM 13
11 OPTION JUMPER TABLE 14
12 CIRCUIT OPERATIONS 15
12.1. Telephone Line Interface and Pulse Dial Circuit 15
12.2. Tone Dial Circuit 15
12.3. Power Circuit and Redial Back-up Circuit 17
13 CPU DATA 18
14 CABINET AND ELECTRICAL PARTS LOCATION 20
15 ACCESSORY AND PACKING MATERIALS 21
16 TERMINAL GUIDE OF ICs TRANSISTORS AND DIODES 22
17 REPLACEMENT PARTS LIST 23
17.1. Base Unit 23
17.2. Accessories And Packing Materials 24
17.3. Screw 24
18 FOR SCHEMATIC DIAGRAM 25
19 SCHEMATIC DIAGRAM 26
19.1. Memo 28
20 CIRCUIT BOARD 29
20.1. Main (Component View) 29
20.2. Main (Flow Solder Side View) 30
20.3. Operation (Flow Solder Side View) 31
Note for TABLE OF CONTENTS:
Because sections 5, 6 and 7 of this manual are extracts from the operating instructions for this model, they are subject to change
without notice. You can download and refer to the original operating instructions on TSN Server for further information.
CONTENTS
Page Page
2
KX-TS550MEB / KX-TS550MEW

Note:
In the information below, Pb, the symbol for lead in the
periodic table of elements, will refer to standard solder or
solder that contains lead.
We will use PbF solder 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°F ~ 70° F
(30°C ~ 40°C) higher than Pb solder. Please use a
soldering iron with temperature control and adjust it to
700°F ± 20° F (370°C ± 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 (600°C).
• When applying PbF solder to double layered boards,
please check the component side for excess which may
flow onto the opposite side (See the figure below).
1 ABOUT LEAD FREE SOLDER (PbF: Pb free)
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.
3
KX-TS550MEB / KX-TS550MEW

2 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 unit 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.
3 CAUTION
Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommendenced by the
manufacturer.
Dispose of used batteries according to the manufacture’s Instructions.
4
KX-TS550MEB / KX-TS550MEW

4 LOCATION OF CONTROLS
5
KX-TS550MEB / KX-TS550MEW

5 SETTINGS
5.1. Connection
6
KX-TS550MEB / KX-TS550MEW

6 OPERATIONS
6.1. Making Calls
6.2. Answering Calls
7 SPECIAL FEATURES
7.1. For Call Waiting Service Users
7.2. Temporary Tone Dialing (For Rotary or Pulse Service Users)
7
KX-TS550MEB / KX-TS550MEW

8 DISASSEMBLY INSTRUCTIONS
Shown in Fig —. To remove —. Remove —.
1Lower Cabinet Screws(2.6×10).............(A)×5
2P.C. Boards Remove the P.C.Boards
8
KX-TS550MEB / KX-TS550MEW

9 TROUBLE SHOOTING GUIDE
9.1. Service Hints
SYMPTOM CURE
No Tone Dialing Check IC1, Q2, Q1, C22 and VR1.
Dead Check IC1, Q2, Q1 and D17.
Rings, no dial tone, no pulse or tone dial Check Q1, Q2, Q7, D17 and Q3.
No rings Check C1, R2 and IC2.
No volume Handset Check IC1, VR1, C15 and C22.
Buttons stick under upper cabinet assembly. From key board Adijust the setting of buttons.
No pulse dial Check Q1, Q2 and IC1.
9.2. Pulse Dialing Problems
9
KX-TS550MEB / KX-TS550MEW

9.3. Problems With the Handset
9.4. Tone Dialing Problems
10
KX-TS550MEB / KX-TS550MEW