Panasonic KX-FT938RU-B / KX-FT938CA-B / KX-FT938UA-B Service Manual ▷ View online
ORDER NO. KMF0605959CE
Facsimile with Digital Answering System
KX-FT938RU-B
KX-FT938CA-B
KX-FT938UA-B
KX-FT938CA-B
KX-FT938UA-B
B: Black Version
(for Russia)
(for Kazakhstan, Uzbekistan)
(for Ukraine)
(for Russia)
(for Kazakhstan, Uzbekistan)
(for Ukraine)
2
KX-FT938RU-B/KX-FT938CA-B/KX-FT938UA-B
TABLE OF CONTENTS
PAGE
PAGE
1 Safety Precautions ----------------------------------------------- 3
1.1. For Service Technicians ---------------------------------- 3
1.2. AC Caution -------------------------------------------------- 4
1.3. Personal Safety Precautions ---------------------------- 5
1.4. Service Precautions --------------------------------------- 6
1.2. AC Caution -------------------------------------------------- 4
1.3. Personal Safety Precautions ---------------------------- 5
1.4. Service Precautions --------------------------------------- 6
2 Warning -------------------------------------------------------------- 7
2.1. About Lead Free Solder (PbF: Pb free) -------------- 7
2.2. Insulation Resistance Test ------------------------------- 7
2.3. Battery Caution --------------------------------------------- 7
2.2. Insulation Resistance Test ------------------------------- 7
2.3. Battery Caution --------------------------------------------- 7
3 Specifications ------------------------------------------------------ 8
4 General/Introduction--------------------------------------------- 9
4 General/Introduction--------------------------------------------- 9
4.1. Optional Accessories-------------------------------------- 9
4.2. Translation Lists -------------------------------------------- 9
4.2. Translation Lists -------------------------------------------- 9
5 Features------------------------------------------------------------ 10
6 Technical Descriptions---------------------------------------- 11
6 Technical Descriptions---------------------------------------- 11
6.1. Connection Diagram ------------------------------------ 11
6.2. General Block Diagram--------------------------------- 12
6.3. Control Section ------------------------------------------- 14
6.4. Facsimile Section ---------------------------------------- 20
6.5. Sensors and Switches ---------------------------------- 26
6.6. Modem Section ------------------------------------------- 30
6.7. NCU Section ---------------------------------------------- 37
6.8. ITS (Integrated Telephone System) AND
6.2. General Block Diagram--------------------------------- 12
6.3. Control Section ------------------------------------------- 14
6.4. Facsimile Section ---------------------------------------- 20
6.5. Sensors and Switches ---------------------------------- 26
6.6. Modem Section ------------------------------------------- 30
6.7. NCU Section ---------------------------------------------- 37
6.8. ITS (Integrated Telephone System) AND
MONITOR SECTION ----------------------------------- 41
6.9. ATAS (Automatic Telephone Answering
System) SECTION--------------------------------------- 41
6.10. Operation Board Section ------------------------------- 43
6.11. LCD Section ----------------------------------------------- 44
6.12. Power Supply Board Section ------------------------- 45
7 Location of Controls and Components------------------ 48
7.1. Overview --------------------------------------------------- 48
7.2. Control Panel---------------------------------------------- 49
7.2. Control Panel---------------------------------------------- 49
8 Installation Instructions -------------------------------------- 50
8.1. Installation Space ---------------------------------------- 50
8.2. Connections ----------------------------------------------- 50
8.3. Installing the Recording Paper------------------------ 51
8.2. Connections ----------------------------------------------- 50
8.3. Installing the Recording Paper------------------------ 51
9 Operation Instructions ---------------------------------------- 52
9.1. Setting Your Logo ---------------------------------------- 52
10 Test Mode---------------------------------------------------------- 54
10.1. DTMF Single Tone Transmit Selection ------------- 55
10.2. Button Code Table --------------------------------------- 55
10.3. Print Test Pattern----------------------------------------- 55
10.2. Button Code Table --------------------------------------- 55
10.3. Print Test Pattern----------------------------------------- 55
11 Service Mode ----------------------------------------------------- 56
11.1. Programming and Lists --------------------------------- 56
11.2. The Example of the Printed List ---------------------- 60
11.2. The Example of the Printed List ---------------------- 60
12 Troubleshooting Guide --------------------------------------- 64
12.1. Troubleshooting summary ----------------------------- 64
12.2. Error Messages-Display-------------------------------- 65
12.3. Error Messages Report--------------------------------- 67
12.4. Remote Programming ---------------------------------- 88
12.5. Troubleshooting Details -------------------------------- 91
12.2. Error Messages-Display-------------------------------- 65
12.3. Error Messages Report--------------------------------- 67
12.4. Remote Programming ---------------------------------- 88
12.5. Troubleshooting Details -------------------------------- 91
13 Service Fixture & Tools --------------------------------------117
14 Disassembly and Assembly Instructions--------------118
14 Disassembly and Assembly Instructions--------------118
14.1. Disassembly Flowchart --------------------------------118
14.2. Disassembly Procedure ------------------------------ 120
14.2. Disassembly Procedure ------------------------------ 120
15 Maintenance ---------------------------------------------------- 131
15.1. Maintenance Items and Componet Locations -- 131
15.2. Gear Section -------------------------------------------- 133
15.2. Gear Section -------------------------------------------- 133
15.3. Jams ------------------------------------------------------- 139
15.4. Cleaning -------------------------------------------------- 140
15.4. Cleaning -------------------------------------------------- 140
16 Miscellaneous -------------------------------------------------- 141
16.1. Terninal Guide of the ICs, Transistors and
Diodes ----------------------------------------------------- 141
16.2. HOW TO REPLACE THE FLAT PACKAGE IC - 143
16.3. Test Chart------------------------------------------------- 147
16.3. Test Chart------------------------------------------------- 147
17 Schematic Diagram ------------------------------------------- 149
17.1. Digital Board --------------------------------------------- 149
17.2. Analog Board -------------------------------------------- 151
17.3. Operation Board ---------------------------------------- 153
17.4. Power Supply Board ----------------------------------- 154
17.2. Analog Board -------------------------------------------- 151
17.3. Operation Board ---------------------------------------- 153
17.4. Power Supply Board ----------------------------------- 154
18 Printed Circuit Board----------------------------------------- 155
18.1. Digital Board --------------------------------------------- 155
18.2. Analogue Board ---------------------------------------- 157
18.3. Operation Board ---------------------------------------- 159
18.4. Power Supply Board ----------------------------------- 161
18.2. Analogue Board ---------------------------------------- 157
18.3. Operation Board ---------------------------------------- 159
18.4. Power Supply Board ----------------------------------- 161
19 Appendix Information of Schematic Diagram ------- 162
20 Exploded View and Replacement Parts List --------- 163
20 Exploded View and Replacement Parts List --------- 163
20.1. Cabinet, Mechanical and Electrical Parts
Location --------------------------------------------------- 163
20.2. Replacement Parts List ------------------------------- 168
20.3. Cabinet and Mechanical Parts ---------------------- 168
20.4. Digital Board Parts ------------------------------------- 169
20.5. Analog Board Parts ------------------------------------ 171
20.6. Operation Board Parts -------------------------------- 173
20.7. Power Supply Board Parts --------------------------- 174
20.8. Fixtures and Tools -------------------------------------- 174
20.3. Cabinet and Mechanical Parts ---------------------- 168
20.4. Digital Board Parts ------------------------------------- 169
20.5. Analog Board Parts ------------------------------------ 171
20.6. Operation Board Parts -------------------------------- 173
20.7. Power Supply Board Parts --------------------------- 174
20.8. Fixtures and Tools -------------------------------------- 174
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KX-FT938RU-B/KX-FT938CA-B/KX-FT938UA-B
1 Safety Precautions
1. Before servicing, unplug the AC power cord to prevent an electric shock.
2. When replacing parts, use only the manufacturer's recommended components.
3. Check the condition of the power cord. Replace if wear or damage is evident.
4. After servicing, be sure to restore the lead dress, insulation barriers, insulation papers, shields, etc.
5. Before returning the serviced equipment to the customer, be sure to perform the following insulation resistance test to prevent
2. When replacing parts, use only the manufacturer's recommended components.
3. Check the condition of the power cord. Replace if wear or damage is evident.
4. After servicing, be sure to restore the lead dress, insulation barriers, insulation papers, shields, etc.
5. Before returning the serviced equipment to the customer, be sure to perform the following insulation resistance test to prevent
the customer from being exposed to shock hazards.
1.1.
For Service Technicians
ICs and LSIs are vulnerable to static electricity.
When repairing, the following precautions will help prevent recurring malfunctions.
When repairing, the following precautions will help prevent recurring malfunctions.
1. Cover the plastic part’s boxes with aluminum foil.
2. Ground the soldering irons.
3. Use a conductive mat on the worktable.
4. Do not touch the IC or LSI pins with bare fingers.
2. Ground the soldering irons.
3. Use a conductive mat on the worktable.
4. Do not touch the IC or LSI pins with bare fingers.
1.1.1.
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 materi-
als.
The following lead free (PbF) solder wire sizes are recommended for service of this product: 0.3mm, 0.6mm and 1.0mm.
(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 materi-
als.
The following lead free (PbF) solder wire sizes are recommended for service of this product: 0.3mm, 0.6mm and 1.0mm.
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KX-FT938RU-B/KX-FT938CA-B/KX-FT938UA-B
1.1.2.
How to recognize that Pb Free Solder is Used
P.C.Boards marked as “PbF” use Pb Free solder. (See the figure below.)
(Example: Digital board)
Note: The “PbF” marked may be found on different areas of
the same P.C.Board,depending on manufacture date.
1.2.
AC Caution
For safety, before closing the lower cabinet, please make sure of the following precautions.
1. The earth lead is fixed with the screw.
2. The AC lead is connected properly to power supply unit.
3. Wrap the earth lead around the core 5 times.
4. Wrap the AC lead around the core 5 times.
2. The AC lead is connected properly to power supply unit.
3. Wrap the earth lead around the core 5 times.
4. Wrap the AC lead around the core 5 times.
REF-CH
PCB-CH
AUTO-CH
PbF
PFUP1598Z
E
Q1
Q7
D502
D501
A
J2
YELLOW
BLUE
R172
10
1
CN206
CN3
1
5
1
16
CN4
1
11
IC7
1
9 1
7
BOND
CN8
CN1
IC4
1
28
14
15
CN10
1
8
IC16
3
1
X3
CN2
11
6
J1
1
16
IC6
17
32
IC2
32
17
1
16
IC10
17
14
8
A
RA7
2
CN6
CN5
1
2
1
8
9
5
8
4
1
1.25A
IC15
5
8
4
1
IC12
IC9
14
8
5
B
32.7
X1
DG
TEST
CN9
2
1
C78
C75
C72
5
1
3
4
IC3
Q2
E
Q13
E
Q10
E
E
Q14
D507
X2
C228
C142
C227
C235
C214
C213
C144
+5VA
C85
C12
C11
R2
R1
R10
F1
C73
C10
C74
R3
C104
C106
0.25A
F2
R74
C83
R33
R32
C31
C82
R73
R72
C70
C76
C79
C81
C80
R71
R92
R94
R95
C90
C71
C77
R93
C92
C91
R91
R96
R70
C169
C170 R160
R159
R90
R157
R178
C93
R100
C100
C103
R101
C101
C102
R229
C236
C237
C237
L7
C94
C129
L18
R227
R143
R146
R142
C141
R208
R203
R207
R209
C211
R211
R212
R213
R210
C234
C212
C115
R126
C117
C84
R125
C114
L9
R128
C125
L11
C126
C127
R127
R75
R129
L12
C116
L10
R76
C86
C251
MARKED
