Panasonic SAPM-48-EG Service manual
CD Stereo System
Model No. SA-PM48EG
Product Color: (K)...Black Type
PSG0902007CE
Notes: This model’s CD mechanism unit is DLS6C. Please refer to the Original Service Manual (Order No.
MD0803034CE) for this mechanism.
TABLE OF CONTENTS
PAGE PAGE
1 Safety Precautions----------------------------------------------- 3
1.1. General Guidelines---------------------------------------- 3
1.2. Before Repair and Adjustment------------------------- 3
1.3. Protection Circuitry ---------------------------------------- 3
1.4. Safety Part Information----------------------------------- 4
2 Warning-------------------------------------------------------------- 5
2.1. Prevention of Electro Static Discharge (ESD)
to Electrostatically Sensitive (ES) Devices---------- 5
2.2. Precaution of Laser Diode------------------------------- 6
2.3. Service caution based on Legal restrictions-------- 7
2.4. Handling Precaution for Traverse Unit --------------- 8
3 Service Navigation----------------------------------------------10
3.1. Service Information-------------------------------------- 10
4 Specifications ---------------------------------------------------- 11
5 Location of Controls and Components------------------ 12
5.1. Main Unit Key Button Operations -------------------- 12
5.2. Remote Control Key Button Operations------------ 12
6 Operating Instructions ---------------------------------------- 13
6.1. Disc Information ------------------------------------------ 13
7 Self diagnosis and special mode setting --------------- 14
7.1. Service Mode Summary Table------------------------ 14
7.2. Service Mode Table ------------------------------------- 15
7.3. Cassette Self Diagnosis Function-------------------- 18
7.4. Cassette Mechanism Self-Diagnostic Mode ------ 19
© Panasonic Corporation 2009. All rights reserved.
Unauthorized copying and distribution is a violation of
law.
7.5. Error Code Table -----------------------------------------20
8 Troubleshooting Guide---------------------------------------- 21
9 Service Fixture & Tools --------------------------------------- 22
10 Disassembly and Assembly Instructions---------------23
10.1. Disassembly flow chart --------------------------------- 24
10.2. Main Parts Location Diagram ------------------------- 25
10.3. Disassembly of Top Cabinet Assembly------------- 26
10.4. Disassembly of Headphone P.C.B. ------------------ 28
10.5. Disassembly of iPod P.C.B.---------------------------- 28
10.6. Disassembly of Deck Mechanism Unit ------------- 29
10.7. Disassembly of Cassette Lid-------------------------- 30
10.8. Disassembly of Front Panel Assembly -------------31
10.9. Disassembly of USB P.C.B. --------------------------- 32
10.10. Disassembly of Panel P.C.B. -------------------------- 33
10.11. Disassembly of FL Window---------------------------- 34
10.12. Disassembly of Centre Ornament ------------------- 35
10.13. Disassembly of CD Lid----------------------------------35
10.14. Disassembly of CD Mechanism Unit (DLS6C) --- 36
10.15. Disassembly of Power P.C.B. ------------------------- 37
10.16. Replacement of Power Amp IC (IC5101) ---------- 38
10.17. Disassembly of Main P.C.B. --------------------------- 39
10.18. Disassembly of Fan Unit -------------------------------41
10.19. Disassembly of Transformer P.C.B. ----------------- 42
10.20. Replacement of Transistor (Q5901)----------------- 44
10.21. Disassembly of Deck P.C.B.---------------------------45
10.22. Disassembly of Deck Mechanism P.C.B.----------- 46
10.23. Disassembly of Deck Mechanism Unit -------------48
10.24. Disassembly of CD Servo P.C.B.--------------------- 56
11 Disassembly and Assembly of Traverse Unit --------- 58
11.1. Disassembling Procedures ---------------------------- 58
11.2. Assembling Procedure---------------------------------- 59
12 Service Position ------------------------------------------------- 61
12.1. Checking & Repairing Deck Mechanism
P.C.B.--------------------------------------------------------61
12.2. Checking & Repairing Deck P.C.B. ------------------ 62
12.3. Checking & Repairing USB P.C.B.------------------- 63
12.4. Checking & Repairing Panel P.C.B. ----------------- 65
12.5. Checking & Repairing CD Servo P.C.B.------------ 66
12.6. Checking & Repairing Power P.C.B. ---------------- 67
12.7. Checking & Repairing Transformer P.C.B.--------- 69
12.8. Checking & Repairing Main P.C.B. ------------------ 71
13 Procedure for Checking Operation of Individual
Parts of Deck Mechanism Unit ----------------------------- 72
13.1. Operation Check with Cassette Tape --------------- 72
13.2. Operation Check without Cassette Tape -----------73
14 Measurements and Adjustments -------------------------- 74
14.1. Cassette Deck Section --------------------------------- 74
15 Voltage Measurement & Waveform Chart--------------- 76
15.1. DECK P.C.B. ---------------------------------------------- 76
15.2. DECK MECHANISM P.C.B. --------------------------- 76
15.3. MAIN P.C.B. (1/2) ---------------------------------------- 77
15.4. MAIN P.C.B. (2/2) ---------------------------------------- 78
15.5. PANEL P.C.B. ---------------------------------------------79
15.6. POWER P.C.B. ------------------------------------------- 79
15.7. TRANSFORMER P.C.B.--------------------------------79
15.8. USB P.C.B.-------------------------------------------------80
15.9. Waveform Chart ------------------------------------------ 81
16 Illustration of IC’s, Transistors and Diodes ------------ 82
17 Overall Simplified Block for PM48------------------------- 83
18 Block Diagram --------------------------------------------------- 84
18.1. CD SERVO BLOCK DIAGRAM ---------------------- 84
18.2. DECK/ DECK MECHANISM/ iPod BLOCK
DIAGRAM ------------------------------------------------- 85
18.3. MAIN(1/2)/ PANEL/TRANSFORMER BLOCK
DIAGRAM ------------------------------------------------- 86
18.4. MAIN(2/2)/ HEADPHONE/ USB BLOCK
DIAGRAM ------------------------------------------------- 87
19 Wiring Connection Diagram -------------------------------- 88
20 Schematic Diagram Notes ----------------------------------- 89
21 Schematic Diagram -------------------------------------------- 90
21.1. CD SERVO CIRCUIT----------------------------------- 90
21.2. MAIN CIRCUIT (1/4) ------------------------------------ 91
21.3. MAIN CIRCUIT (2/4) ------------------------------------ 92
21.4. MAIN CIRCUIT (3/4) ------------------------------------ 93
21.5. MAIN CIRCUIT (4/4) ------------------------------------ 94
21.6. PANEL CIRCUIT, HEADPHONE CIRCUIT
and DECK MECHANISM CIRCUIT ----------------- 95
21.7. DECK CIRCUIT ------------------------------------------ 96
21.8. USB CIRCUIT -------------------------------------------- 97
21.9. iPod CIRCUIT and POWER CIRCUIT ------------- 98
21.10. TRANSFORMER CIRCUIT --------------------------- 99
22 Printed Circuit Board----------------------------------------- 100
22.1. CD SERVO P.C.B. and TRANSFORMER
P.C.B. ------------------------------------------------------100
22.2. MAIN P.C.B.---------------------------------------------- 101
22.3. PANEL P.C.B., HEADPHONE P.C.B. and
POWER P.C.B. ------------------------------------------ 102
22.4. DECK P.C.B., DECK MECHANISM P.C.B.,
iPod P.C.B. and USB P.C.B. -------------------------103
23 Terminal Function of IC’s ----------------------------------- 104
23.1. IC7001 (MN6627954AMA) IC SERVO
PROCESSOR -------------------------------------------104
23.2. IC7002 (BA5948FPE2) IC 4CH Drive ------------- 105
23.3. IC800 (RFKWMPM48EG) IC MICROPROCESSOR -------------------------------------------105
24 Exploded View and Replacement Parts List----------107
24.1. Exploded View and Mechanical replacement
Parts List--------------------------------------------------107
24.2. Electrical Replacement Parts List ------------------ 111
2
1 Safety Precautions
1.1. General Guidelines
1. When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or
damaged by the short circuit.
2. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly
installed.
3. After servicing, carry out the following leakage current checks to prevent the customer from being exposed to shock hazards.
1.1.1. Leakage Current Cold Check
1. Unplug the AC cord and connect a jumper between the two prongs on the plug.
2. measure the resistance value, with an ohmmeter between the jumpered AC plug and each exposed metallic cabinet part on
the equipment such as screwheads, connectors, control shafts, etc. When the exposed metallic part has a return path to the
chassis, the reading should be between 1MΩ and 5.2MΩ. When the exposed metal does not have a return path to the chas-
sis, the reading must be
1.1.2. Leakage Current Hot Check
1. Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this check.
2. Connect a 1.5kΩ, 10 watts resistor, in parallel with a 0.15μF capacitors, between each exposed metallic part on the set and a
good earth ground such as a water pipe, as shown in Figure 1.
3. Use an AC voltmeter, with 1000 ohms/volt or more sensitivity, to measure the potential across the resistor.
4. Check each exposed metallic part, and measure the voltage at each point.
5. Reverse the AC plug in the AC outlet and repeat each of the above measurements.
6. The potential at any point should not exceed 0.75 volts RMS. A leakage current tester (Simpson Model 229 or equivalent)
may be used to make the hot checks, leakage current must not exceed 1/2 milliamp. In case a measurement is outside of the
limits specified, there is a possibility of a shock hazard, and the equipment should be repaired and rechecked before it is
returned to the customer.
Figure. 1
1.2. Before Repair and Adjustment
Caution : DO NOT SHORT-CIRCUIT DIRECTLY (with a screwdriver blade, for instance), as this may destroy solid state devices.
After repairs are completed, restore power gradually using a variac, to avoid overcurrent.
• Current consumption at AC 220-240V, at 50Hz in NO SIGNAL mode (at volume min in FM Tuner mode) should be ~150 mA.
1.3. Protection Circuitry
The protection circuitry may have operated if either of the following conditions are noticed:
• No sound is heard when the power is turned on.
• Sound stops during a performance.
The function of this circuitry is to prevent circuitry damage if, for example, the positive and negative speaker connection wires are
"shorted", or if speaker systems with an impedance less than the indicated rated impedance of the amplifier are used.
If this occurs, follow the procedure outlines below:
1. Turn off the power.
2. Determine the cause of the problem and correct it.
3. Turn on the power once again after one minute.
Note:
When the protection circuitry functions, the unit will not operate unless the power is first turned off and then on again.
3
1.4. Safety Part Information
Safety Parts List:
There are special components used in this equipment which are important for safety.
These parts are marked by in the Schematic Diagrams, Exploded View & Replacement Parts List. It is essential that these
critical parts should be replaced with manufacturer’s specified parts to prevent shock, fire or other hazards. Do not modify the
original design without permission of manufacturer.
Table 1
Safety Ref. No. Part No. Part Name & Description Remarks
301 RAEX0190Z-V TRAVERSE UNIT ASS’Y (W/O CD SERVO P.C.B.) (RTL)
A2 K2CQ2CA00007 AC CORD
L5901 ELF15N035AN LINE FILTER
T5901 G4CYBYY00022 TRANSFORMER
T5902 G4C2AAJ00005 BACK-UP TRANSFORMER
Z5901 ERZVA5Z471 ZENER
RL5901 K6B1AEA00003 POWER RELAY
F5901 K5D102BLA013 FUSE
FP5901 K5G502AA0002 FUSE PROTECTOR
JK5901 K2AA2B000011 AC INLET
PCB9 REPX0708A TRANSFORMER P.C.B. (RTL)
A6 J0KG00000037 AC CLAMP FILTER
A3 RQTX0290-D O/I BOOK (Ge/Fr/It/Sp)
A3 RQTX0292-H O/I BOOK (Du/Da/Sw)
4
2 Warning
2.1. Prevention of Electro Static Discharge (ESD) to Electrostatically Sensi-
tive (ES) Devices
Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and
semiconductor “chip” components. The following techniques should be used to help reduce the incidence of component damage
caused by electrostatic discharge (ESD).
1. Immediately before handling any semiconductor component or semiconductor-equiped assembly, drain off any ESD on your
body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging ESD wrist strap,
which should be removed for potential shock reasons prior to applying power to the unit under test.
2. After removing an electrical assembly equiped with ES devices, place the assembly on a conductive surface such as alumin-
ium foil, to prevent electrostatic charge build up or exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.
4. Use only an anti-static solder remover device. Some solder removal devices not classified as “anti-static (ESD protected)” can
generate electrical charge sufficient to damage ES devices.
5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices.
6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most
replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminium foil or comparable conductive material).
7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material
to the chassis or circuit assembly into which the device will be installed.
Caution :
Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.
8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise harmless motion such as the
brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity (ESD) suf-
ficient to damage an ES device).
5
2.2. Precaution of Laser Diode
CAUTION!
THIS PRODUCT UTILIZES A LASER.
USE OF CONTROLS OR ADJUSTMENTS OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE SPECIFIED HEREIN MAY RESULT
IN HAZARDOUS RADIATION EXPOSURE.
Caution:
This product utilizes a laser diode with the unit turned "on", invisible laser radiation is emitted from the pickup lens.
Wavelength: 785 nm (CD)
Maximum output radiation power from pickup: 100 μW/VDE
Laser radiation from the pickup unit is safety level, but be sure the followings:
1. Do not disassemble the pickup unit, since radiation from exposed laser diode is dangerous.
2. Do not adjust the variable resistor on the pickup unit. It was already adjusted.
3. Do not look at the focus lens using optical instruments.
4. Recommend not to look at pickup lens for a long time.
ACHTUNG :
Dieses Produkt enthält eine Laserdiode. Im eingeschalteten Zustand wird unsichtbare Laserstrahlung von der Lasereinheitadgestrahit.
Wellenlänge : 785nm (CD)
Maximale Strahlungsleistung der Lasereinheit :100 μW/VDE
Die Strahlung an der Lasereinheit ist ungefährlich, wenn folgende Punkte beachtet werden:
1. Die Lasereinheit nicht zerlegen, da die Strahlung an der freigelegten Laserdiode gefährlich ist.
2. Den werkseitig justierten Einstellregler der Lasereinhit nicht verstellen.
3. Nicht mit optischen Instrumenten in die Fokussierlinse blicken.
4. Nicht über längere Zeit in die Fokussierlinse blicken.
6
2.3. Service caution based on Legal restrictions
2.3.1. General description about Lead Free Solder (PbF)
The lead free solder has been used in the mounting process of all electrical components on the printed circuit boards used for this
equipment in considering the globally environmental conservation.
The normal solder is the alloy of tin (Sn) and lead (Pb). On the other hand, the lead free solder is the alloy mainly consists of tin
(Sn), silver (Ag) and Copper (Cu), and the melting point of the lead free solder is higher approx.30 degrees C (86°F) more than that
of the normal solder.
Definition of PCB Lead Free Solder being used
The letter of “PbF” is printed either foil side or components side on the PCB using the lead free solder.
(See right figure)
Service caution for repair work using Lead Free Solder (PbF)
• The lead free solder has to be used when repairing the equipment for which the lead free solder is used.
(Definition: The letter of “PbF” is printed on the PCB using the lead free solder.)
• To put lead free solder, it should be well molten and mixed with the original lead free solder.
• Remove the remaining lead free solder on the PCB cleanly for soldering of the new IC.
• Since the melting point of the lead free solder is higher than that of the normal lead solder, it takes the longer time to melt the
lead free solder.
• Use the soldering iron (more than 70W) equipped with the temperature control after setting the temperature at 350±30 degrees
C (662±86°F).
Recommended Lead Free Solder (Service Parts Route.)
• The following 3 types of lead free solder are available through the service parts route.
RFKZ03D01K-----------(0.3mm 100g Reel)
RFKZ06D01K-----------(0.6mm 100g Reel)
RFKZ10D01K-----------(1.0mm 100g Reel)
Note
* Ingredient: Tin (Sn), 96.5%, Silver (Ag) 3.0%, Copper (Cu) 0.5%, Cobalt (Co) / Germanium (Ge) 0.1 to 0.3%
7
2.4. Handling Precaution for Traverse Unit
The laser diode in the optical pickup unit may break down due to static electricity of clothes or human body. Special care must be
taken avoid caution to electrostatic breakdown when servicing and handling the laser diode in the traverse unit.
2.4.1. Cautions to Be Taken in Handling the Optical Pickup Unit
The laser diode in the optical pickup unit may be damaged due to electrostatic discharge generating from clothes or human body.
Special care must be taken avoid caution to electrostatic discharge damage when servicing the laser diode.
1. Do not give a considerable shock to the optical pickup unit as it has an extremely high-precise structure.
2. To prevent the laser diode from the electrostatic discharge damage, the flexible cable of the optical pickup unit removed
should be short-circuited with a short pin or a clip.
3. The flexible cable may be cut off if an excessive force is applied to it. Use caution when handling the flexible cable.
4. The antistatic FPC is connected to the new optical pickup unit. After replacing the optical pickup unit and connecting the flexible cable, cut off the antistatic FPC.
2.4.2. Grounding for electrostatic breakdown prevention
Some devices such as the CD player use the optical pickup (laser diode) and the optical pickup will be damaged by static electricity
in the working environment. Proceed servicing works under the working environment where grounding works is completed.
2.4.2.1. Worktable grounding
1. Put a conductive material (sheet) or iron sheet on the area where the optical pickup is placed, and ground the sheet.
8
2.4.2.2. Human body grounding
1. Use the anti-static wrist strap to discharge the static electricity form your body. (Figure 2)
Figure 2
9
3 Service Navigation
3.1. Service Information
This service manual contains technical information which will allow service perssonnel’s to understand and service this model.
Please place orders using the parts list and not the drawing reference numbers.
If the circuit is changed or modified, this information will be followed by supplement service manual to be filed with original service
manual.
1. CD Mechanism Unit:
• This model uses CD Mechanism Unit (DLS6C).
• This service manual does not contain the following information on CD Mechanism Unit (DLS6C).
- CD Mechanism Unit P.C.B..
- Parts List for individual parts of CD Mechanism Unit (DLS6C).
- Exploded View and Part List for individual parts of CD Mechanism Unit (DLS6C).
Please refer to original service manual (Order No. MD0803034CE).
2. Micro-processor:
• Micro-processor IC, (IC800) is supplied as assembled part (RFKWMPM48EG).
10
4 Specifications
Q Amplifier Section
RMS Output Power Stereo Mode/ JEITA
Front Ch (both channel driven) 20 W per channel (4 Ω), 1 kHz,
10% THD
FTC Output Power Stereo Mode
Front Ch (both channel driven) 15 W per channel (4 Ω), 60 Hz to
20 kHz, 10% THD
Phone jack
Terminal Stereo, 3.5 mm
Q Tuner Section
Preset station FM 30 stations
AM 15 stations
Frequency Modulation (FM)
Frequency range 87.50 MHz to 108.00 MHz (50 kHz
step)
Antenna terminals 75 Ω (unbalanced)
AM Modulation (AM)
Frequency range 522 kHz to 1629 kHz (9 kHz step)
Q Cassette Deck Section
Track system 4-track, 2-channel
Head
Record/playback Solid Permalloy Head
Erasure Double Gap Ferrite Head
Motor DC Servo Motor
Recording system AC Bias 100 kHz
Erase system AC Erase 100 kHz
Tape speed 4.8 cm/s
Overall frequency response (+3, -6 dB) at
DECK OUT
Normal 35 Hz to 14 kHz
S/N RATIO 49 dB (A-WTD)
Wow and flutter 0.15 % (WRMS)
Fast-forward and rewind time Approx. 120 seconds with C-60
cassette tape
Q CD Section
Disc played [8 cm or 12 cm]
(1) CD-Audio (CD-DA)
(2) CD-R/RW (CD-DA, MP3)
(3) MP3
Pickup
Wavelength 785 nm
Laser power CLASS I (CD)
Audio output (Disc)
Number of channels FL, FR, 2 channel
Q USB Section
Supported audio file format MP3 (*.mp3)
Maximum port power 500 mA
Q General
Power supply AC 220 to 240 V, 50 Hz
Power consumption 73 W
Dimensions (W x H x D) 153 mm x 226 mm x 292 mm
Mass 2.8 kg
Operating temperature range 0°C to +40°C
Operating humidity range 35% to 80 % RH (no condensa-
tion)
Power consumption in standby mode 0.6 W (approx)
Notes :
1. Specifications are subject to change without notices. Mass and
dimensions are approximate.
2. Total harmonic distortion is measured by the digital spectrum analyzer.
Q System : SC-PM48EG-S Music center: SA-PM48EG-K
Speaker: SB-PM48EG-S
Q System : SC-PM48EG-K Music center: SA-PM48EG-K
Speaker: SB-PM48EG-K
11
5 Location of Controls and Components
5.1. Main Unit Key Button Operations
5.2. Remote Control Key Button Operations
12
6 Operating Instructions
6.1. Disc Information
13
7 Self diagnosis and special mode setting
This unit is equipped with features of self-diagnostic & special mode setting for checking the functions & reliability.
7.1. Service Mode Summary Table
The service modes can be activated by pressing various button combination on the main unit and remote control unit.
Below is the summary for the various modes for checking:
Player buttons Remote control unit buttons Application Note
[4], [7] To Enter into Doctor Mode for vari-
ous checking
Player buttons Remote control unit buttons Mode Name Note
Note : Applicable in Doctor Mode [DIMMER] FL Display Test (Refer to the section “7.2.2 service
[6] CD and Tape Eject test (Refer to the section “7.2.2 service
[7] VOLUME setting (50dB) (Refer to the section “7.2.2 service
[8] VOLUME setting (29dB) (Refer to the section “7.2.2 service
[9] VOLUME setting (0dB) (Refer to the section “7.2.2 service
[ ], [1], [1]
[ ], [1], [2]
[ ], [1], [3]
[]
[SLEEP] Cold Start (Refer to the section “7.2.2 service
[2] USB Test Mode (Refer to the section “7.2.2 service
CD Loading Test Mode (DLS6C) (Refer to the section “7.2.2 service
CD Traverse Unit Test Mode
(DLS6C)
CD Combination Test Mode
(DLS6C)
TPS Test Mode (Refer to the section “7.2.2 service
(Refer to the section “7.2.1 Service
Mode Table 1.)
mode Table 2 for more information.)
mode Table 2 for more information.)
mode Table 2 for more information.)
mode Table 2 for more information.)
mode Table 2 for more information.)
mode Table 2 for more information.)
(Refer to the section “7.2.2 service
mode Table 2 for more information.)
(Refer to the section “7.2.2 service
mode Table 2 for more information.)
mode Table 2 for more information.)
mode Table 2 for more information.)
mode Table 2 for more information.)
14
7.2. Service Mode Table
Below is the various special modes for checking:-
7.2.1. Service Mode Table 1
Item FL Display Key Operation
Mode Name Description Front Key
Self -Diagnostic Mode To enter into self diagnostic
checking for main unit.
Doctor Mode To enter into Doctor Mode
for checking of various
items and displaying
EEPROM and firmware version.
Note: The micro-processor
version as shown is an
example. It will be revise
when there is an updates.
FL Display sequence Display 1 → 2
(Display 1)
Checksum : (Condition 1)
1. Select [ ] for CD mode
(Ensure no CD inserted).
2. Press and hold [ ]button
for 2 seconds follow by
[].
To exit Doctor Mode, press button
on main unit or remote control.
In CD mode:
1. Press [ ] button on main
unit follow by [4] and [7] on
remote control.
To exit Doctor Mode, press button on main unit or remote control.
(a) If there is NO EEPROM header string
OR
(b) If there is no EEPROM ( no data is
received by micro-processor) [NO] is displayed.
Checksum : (Condition 2)
If the version of the EEPROM does not
match or not working properly [NG] is display.
Checksum : (Condition 3)
If the EEPROM version matches, checksum
[YYYY] is displayed.
(Display 2)
The Checksum of EEPROM and firmware
version will be display for 2 sec.
15
7.2.2. Service Mode Table 2
Item FL Display Key Operation
Mode Name Description Front Key
FL Display Test To check the FL segments
display (All segments will
light up)
CD Open and Tape
Eject Test Mode
Volume Setting To check for volume setting
CD Loading Test Mode
(DLS6C)
To check on the CD Open
and Tape Eject function.
during this mode, Bass &
treble is set to 0dB & EQ is
switch off.
To determine the reliability of
CD Loading unit.
To check for the Open/Close
operation for the CD loading
unit. It fails when there is
abnormality in opening or
closing.
In Doctor Mode:
1. Press [DIMMER] button on
remote control.
To cancel, press [0] button on remote
control.
To exit Doctor Mode, press button on main unit or remote control.
In Doctor Mode:
1. Press [6] button on remote control.
To exit Doctor Mode, press button
on main unit or remote control.
In Doctor Mode:
1. Press [7] button on remote control.
To exit Doctor Mode, press button on main unit or remote control.
In Doctor Mode:
2. Press [8] button on remote control.
To exit Doctor Mode, press button on main unit or remote control.
In Doctor Mode:
3. Press [9] button on remote control.
To exit Doctor Mode, press button on main unit or remote control.
In Doctor Mode:
1. Press [ ], [1], [1] button on
remote control.
To cancel, press [0] button on remote
control.
To exit Doctor Mode, press button on main unit or remote control.
CD Traverse Unit Test
Mode (DLS6C)
CD Combination Test
Mode (DLS6C)
To check for the traverse unit
operation. In this mode, the
first & last track is access &
read. (TOC). It fails when
TOC is not completed by IOS
or the traverse is out of
focus.
A combination of CD loading
& traverse unit test.
In Doctor Mode:
1. Press [ ], [1], [2] button on
remote control.
To cancel, press [0] button on remote
control.
To exit Doctor Mode, press button on main unit or remote control.
In Doctor Mode:
1. Press [ ], [1], [3] button on
remote control.
To cancel, press [0] button on remote
control.
To exit Doctor Mode, press button on main unit or remote control.
16
Item FL Display Key Operation
Mode Name Description Front Key
TPS TEST MODE To check FF TPS for deck.
(For more information, refer
to section 7.3.1)
(Condition 1)
If ERROR Flag is set "ERROR" shall be displayed.
TPS check result shall not be shown in this case.
(Condition 2)
If Deck TPS check = OK
(Condition 3)
In Doctor Mode:
2. Press [ ] button on
remote control.
To cancel, press [0] button on remote
control.
To exit Doctor Mode, press button
on main unit or remote control.
Cold Start To activate cold start upon
next AC power up.
USB Test Mode To Inspect USB Testing.
If Deck TPS check = NG
The display will appear after 3s,
In Doctor Mode:
1. Press [SLEEP] button on remote
control.
To exit Doctor Mode, press button
on main unit or remote control.
In Doctor Mode:
1. Select to USB mode.
2. Press [2] button on remote control.
To exit Doctor Mode, press button
on main unit or remote control.
17
7.3. Cassette Self Diagnosis Function
7.3.1. TPS Test Mode
Purpose : This mode is for checking the TPS (For cassette deck function).
Below is the procedures for this mode:Step 1: Enter into Doctor mode (Refer to section 7.1 for procedure to enter into doctor mode).
Step 2 : Press [ ] button on remote control. (It enters into TPS Test mode).
Below is the process flow for TPS Test Mode
18
7.4. Cassette Mechanism Self-Diagnostic Mode
Below is information of the checking of cassette deck mechanism
No. Operation Procedures Micon operation & processing
1 cassette deck mechanism Abnormal Detection
shall be executed for DECK.
2
3
4
5 [REC] key is pressed, after loading in a NOR-
6 Self-diagnostic mode is stopped by pressing the
7 To clear all the abnormalities in the memory,
8 To cancel the self-diagnostic mode press the
[ ] key is pressed, after loading in a
NORMAL type cassette with the recording tab
on the left side removed.
[ ] key is pressed, after loading a
NORMAL, CrO2, METAL type cassette with the
recording tab on the right side removed.
[TAPE ] Key is pressed, after loading in a
NORMAL, CrO2, METAL type cassette ( cassette for TPS checking purposes and with both
recording tabs intact ).
MAL type cassette ( with both recording tabs
intact )
[Q] Key.
press the [Q] Key for more than 5 Sec while the
self-diagnostic mode is stopped.
Key.
Check that all DECK mechanism leaf SW is in OFF state.
FF shall be executed for 2 sec, after which STOP.
Check the following.
{ F.REC INH SW } is OFF
{ HALF SW } is ON
Reel pulse toggles between H & L.
REW shall be executed for 2 sec, after which STOP.
Check the following.
{ F.REC INH SW } is ON
{ HALF SW } is ON
Reel pulse toggles between H & L.
TPS operation is executed. Check the following.
{ F.REC INH SW } is ON
{ HALF SW } is ON
TPS signal changes.
After checking TPS, it shall STOP.
If TPS checking is completed at TAPE END, it is considered as TPS abnormal.
REC operation shall not be executed.
Check the following.
{ F.REC INH SW } is ON
{ HALF SW } is ON
LCD shall display the abnormality item code, when the STOP key is pressed,
it shall display the abnormality item code in the following sequence.
[ TEST H 0 1] [ TEST H 0 2] [ TEST H 0 3]
At this time, all the abnormalities item in the memory is cleared and is displayed on the LCD.[ C L E A R ] display for 1 Sec. then,[ TEST ] is
displayed.
POWER is OFF.At the next POWER ON, normal operation shall be executed.
19
7.5. Error Code Table
Self-Diagnosis Function provides information on any problems occuring for the unit and its respective components by displaying
error codes. Thesed error code such as U**, H** and F** are stored in memory and held unless it is cleared.
The error code is automatically display after entering into self-diagnostic mode.
Error Code Diagnosis Contents Description of error Automatic FL Display Remarks
H01 Mode switch abnormal
(Plunger and capstan
motor)
H02 REC_INHFswitch abnor-
mal
H03 HALF switch abnormal Detection of switch for
H15 CD Open SW Abnormal During normal operation
F01 Reel pulse abnormal Detection of switch for the
F15 CD REST SW Abnormal CD traverse position intial
F26 Communication between
CD servo LSI and micro-p
abnormal.
F76 Power Amp IC output
abnormal
Detection of switch for “On”
when the deck mechanism
is in the driving mode.
Detection time at 1.6ms in
6 times interval
Detection of switch for
presence of the FORWARD recording tab when
a cassette is loaded into
the deck. Detection time is
20ms at 2 times interval.
"ON" state when a casstte
is loaded into the deck.
Detection time is 20ms at 2
times interval. When no
cassette is loaded, it shall
be in "OFF" state.
CD OPEN SW On fail to be
detected with 4 sec. Error
No. shall be clear by force
or during cold start.
reel pulse signal toggling
between high and low.
setting operation failsafe
counter (1000 ms) waiting
for REST SW to turn on.
Error No. shall be clear by
force or during cold start.
CD function DTMS command, after system setting, If SENSE = 'L' cannot
be detected. Memory shall
contain F26 code. After
Power on, CD function
shall continue, error disp l a y s h a l l b e " N O D I S C " .
Error No. shall be clear by
force or cold start.
DCDET1 = L (NG) For power.
For Deck Mechanism Unit
Press [ ] on main
unit for next error.
To exit, press [POWER]
button on main unit. Normal operation shall executed upon next powering
on of the main unit.
For Deck Mechanism Unit
Press [ ] on main
unit for next error.
To exit, press [POWER]
button on main unit. Normal operation shall executed upon next powering
on of the main unit.
For Deck Mechanism Unit
Press [ ] on main
unit for next error.
To exit, press [POWER]
button on main unit. Normal operation shall executed upon next powering
on of the main unit.
For CD Mechanism Unit
(DLS6C).
Press [ ] on main
unit for next error.
For CD Mechanism Unit
(DLS6C).
Press [ ] on main
unit for next error.
To exit, press [POWER]
button on main unit. Normal operation shall executed upon next powering
on of the main unit.
For CD Mechanism Unit
(DLS6C).
Press [ ] on main
unit for next error.
For CD Mechanism Unit
(DLS6C).
Press [ ] on main
unit for next error.
Press [ ] on main
unit for next error.
20
8 Troubleshooting Guide
21
9 Service Fixture & Tools
Prepare service tools before proccess service position.
Service Tools Remarks
Main P.C.B. (CN901) - Panel P.C.B. (CN900) REEX1022 (11P FFC) (RTL)
22
10 Disassembly and Assembly Instructions
“ATTENTION SERVICER”
Be careful when disassembling and servicing.
Some chassis components may have sharp edges
Special Note:
1. This section describes the disassembly procedures for all the major printed circuit boards and main components.
2. Before the disassembly process was carried out, do take special note that all safety precautions are to be carried out.
(Ensure that no AC power supply is connected during disassembling.)
3. For assembly after operation checks or replacement, reverse the respective procedures.
Special reassembly procedures are described only when required.
4. Do take note of the locators on each printed circuit board during reassembling procedures.
5. The Switch Regulator IC may have high temperature after prolonged use.
6. Use caution when removing the top cabinet and avoid touching heat sinks located in the unit.
7. Select items from the following index when checks or replacement are required.
• Disassembly of Top Cabinet Assembly
• Disassembly of Headphone P.C.B.
• Disassembly of iPod P.C.B.
• Disassembly of Deck Mechanism Unit
• Disassembly of Cassette Lid
• Disassembly of Front Panel Assembly
• Disassembly of USB P.C.B.
• Disassembly of Panel P.C.B.
• Disassembly of FL Window
• Disassembly of Centre Ornament
• Disassembly of CD Lid
• Disassembly of CD Mechanism Unit (DLS6C)
• Disassembly of Power P.C.B.
• Replacement of Power Amp IC (IC5101)
• Disassembly of Main P.C.B.
• Disassembly of Fan Unit
• Disassembly of Transformer P.C.B.
• Replacement of Transistor (Q5901)
• Disassembly of Deck Mechanism P.C.B.
• Disassembly of Deck P.C.B.
• Disassembly of Deck Mechanism
• Disassembly of CD Servo P.C.B.
23
10.1. Disassembly flow chart
The following chart is the procedure for disassembling the casing and inside parts for internal inspection when carrying out the servicing.
To assemble the unit, reverse the steps shown in the chart below.
24
10.2. Main Parts Location Diagram
25
10.3. Disassembly of Top Cabinet Assembly
Step 1 : Remove 3 screws.
Step 3 : Remove 3 screws.
Step 2 : Remove 3 screws.
Step 4 : Lift the Top Cabinet Assembly as arrow shown to
release 3 catches.
26
Step 5 : Upset the Top Cabinet Assembly as arrow shown.
Step 6 : Place a support block underneath the Top Cabinet
Assembly.
Step 9 : Detach 9P FFC at connector (CN361) on Main P.C.B..
Step 10 : Detach 12P FFC at connector (CN360) on Main
P. C . B . .
Step 11 : Remove 12P FFC and 9P FFC from Wire Clamp.
Step 12 : Remove Top Cabinet Assembly.
Step 7 : Detach 5P cable at connector (CN902) on Main P.C.B..
Step 8 : Detach 14P FFC at connector (CN350) on Main
P. C.B ..
27
10.4. Disassembly of Headphone P. C. B .
• Follow the (Step 1) - (Step 12) of item 10.3.
10.5. Disassembly of iPod P.C.B.
• Follow the (Step 1) - (Step 12) of item 10.3.
Step 1 : Remove 2 screws.
Step 2 : Remove iPod P.C.B..
Caution : Ensure the iPod P.C.B. is seated properly on the
locator after assembled.
Step 1 : Remove 2 screws.
Step 2 : Release catches.
Step 3 : Remove Headphone P.C.B..
Caution : Take extra care for the catches on the Headphone
P.C.B. during removal and assembly of the Headphone
P.C.B..
28
10.6. Disassembly of Deck Mechanism Unit
• Follow the (Step 1) - (Step 12) of item 10.3.
Step 1 : Remove 4 screws.
Step 3 : Remove Deck Mechanism Unit.
Step 2 : Push the lever as arrow shown to open the cassette
lid.
29
10.7. Disassembly of Cassette Lid
• Follow the (Step 1) - (Step 12) of item 10.3.
• Follow the (Step 1) - (Step 3) of item 10.6.
Step 1 : Release the catches.
Step 2 : Remove Damper gear as arrow shown in order.
Caution : Do not apply strong force in releasing the
catches to avoid damage of the catches..
Step 2 : Remove the Cassette Open Spring as arrow shown in
order.
Caution : Keep the Cassette Open Spring in safe place.
Place it back during assembly
Step 3 : Pull the sides of the Cassette lid shaft to the direction
of the arrow shown.
30
Loading...