Page 1
3CD CHANGER
HI-FI SYSTEM
SERVICE MANUAL
MODEL : FFH-286A/AD, FE-286E
SERVICE MANUAL MODEL:
FFH-286A/AD, FE-286E
Page 2
- 1-1 -
CONTENTS
SECTION 1. GENERAL
• SERVICING PRECAUTIONS
....................................................................................................................
1-2
• ESD PRECAUTIONS
.................................................................................................................................
1-4
• SPECIFICATIONS
.....................................................................................................................................
1-5
SECTION 2. ELECTRICAL
• ADJUSTMENTS
.........................................................................................................................................
2-1
• TROUBLESHOOTING
...............................................................................................................................
2-3
• WAVEFORMS OF MAJOR CHECK POINT
..............................................................................................
2-7
• BLOCK DIAGRAM
...................................................................................................................................
2-17
• SCHEMATIC DIAGRAMS
........................................................................................................................
2-19
• WIRING DIAGRAM
..................................................................................................................................
2-27
• PRINTED CIRCUIT DIARGAMS
..............................................................................................................
2-29
• INTERNAL BLOCK DIAGRAM OF IC’s
...................................................................................................
2-38
• REPAIRS REGARDING CD MECHANISM
.............................................................................................
2-45
SECTION 3. EXPLODED VIEWS
• CABINET AND MAIN FRAME SECTION
.................................................................................................
3-1
• TAPE DECK MECHANISM: AUTO STOP DECK(OPTIONAL)
.................................................................. 3-3
• TAPE DECK MECHANISM: AUTO REVERSE DECK
................................................................................
3-5
• CD MECHANISM
........................................................................................................................................
3-7
SECTION 4. SPEAKER
..................................................................................................................
4-1
SECTION 5. REPLACEMENT PARTS LIST
..................................................................................
5-1
Page 3
SECTION 1. GENERAL
SERVICING PRECAUTIONS
NOTES REGARDING HANDLING OF THE PICK-UP
1. Notes for transport and storage
1) The pick-up should always be left in its conductive bag until immediately prior to use.
2) The pick-up should never be subjected to external pressure or impact.
2. Repair notes
1) The pick-up incorporates a strong magnet, and so should never be brought close to magnetic materials.
2) The pick-up should always be handled correctly and carefully, taking care to avoid external pressure and
impact. If it is subjected to strong pressure or impact, the result may be an operational malfunction and/or
damage to the printed-circuit board.
3) Each and every pick-up is already individually adjusted to a high degree of precision, and for that reason
the adjustment point and installation screws should absolutely never be touched.
4) Laser beams may damage the eyes!
Absolutely never permit laser beams to enter the eyes!
Also NEVER switch ON the power to the laser output part (lens, etc.) of the pick-up if it is damaged.
5) Cleaning the lens surface
If there is dust on the lens surface, the dust should be cleaned away by using an air bush (such as used
for camera lens). The lens is held by a delicate spring. When cleaning the lens surface, therefore, a
cotton swab should be used, taking care not to distort this.
6) Never attempt to disassemble the pick-up.
Spring by excess pressure. If the lens is extremely dirty, apply isopropyl alcohol to the cotton swab. (Do
not use any other liquid cleaners, because they will damage the lens.) Take care not to use too much of
this alcohol on the swab, and do not allow the alcohol to get inside the pick-up.
- 1-2 -
Storage in conductive bag
Drop impact
NEVER look directly at the laser beam, and don’t let
contact fingers or other exposed skin.
Magnet
How to hold the pick-up
Pressure
Pressure
Cotton swab
Conductive Sheet
Page 4
NOTES REGARDING COMPACT DISC PLAYER REPAIRS
1. Preparations
1) Compact disc players incorporate a great many ICs as well as the pick-up (laser diode). These
components are sensitive to, and easily affected by, static electricity. If such static electricity is high
voltage, components can be damaged, and for that reason components should be handled with care.
2) The pick-up is composed of many optical components and other high-precision components. Care must
be taken, therefore, to avoid repair or storage where the temperature of humidity is high, where strong
magnetism is present, or where there is excessive dust.
2. Notes for repair
1) Before replacing a component part, first disconnect the power supply lead wire from the unit
2) All equipment, measuring instruments and tools must be grounded.
3) The workbench should be covered with a conductive sheet and grounded.
When removing the laser pick-up from its conductive bag, do not place the pick-up on the bag. (This is
because there is the possibility of damage by static electricity.)
4) To prevent AC leakage, the metal part of the soldering iron should be grounded.
5) Workers should be grounded by an armband (1MΩ)
6) Care should be taken not to permit the laser pick-up to come in contact with clothing, in order to prevent
static electricity changes in the clothing to escape from the armband.
7) The laser beam from the pick-up should NEVER be directly facing the eyes or bare skin.
CLEARING MALFUNCTION
You can reset your unit to initial status if malfunction occur(button malfunction, display, etc.).
Using a pointed good conductor(such as driver), simply short the RESET jump wire on the inside of the
volume knob for more than 3 seconds.
If you reset your unit, you must reenter all its settings(stations, clock, timer)
NOTE: 1. To operate the RESET jump wire, pull the volume rotary knob and release it.
2. If you wish to operate the RESET jump wire, it is necessary to unplug the power cord.
- 1-3 -
Armband
Conductive
Sheet
Resistor
(1 Mohm)
Resistor
(1 Mohm)
VOLUME KNOB
UP
DOWN
VOLUME
RESET jump wire
Page 5
ESD PRECAUTIONS
Electrostatically Sensitive Devices (ESD)
Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components
commonly are called Electrostatically Sensitive Devices (ESD). Examples of typical ESD 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 static electricity.
1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off
any electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear a
commercially available discharging wrist strap device, which should be removed for potential shock reasons
prior to applying power to the unit under test.
2. After removing an electrical assembly equipped with ESD devices, place the assembly on a conductive
surface such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder ESD devices.
4. Use only an anti-static solder removal device. Some solder removal devices not classified as "anti-static" can
generate electrical charges sufficient to damage ESD devices.
5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ESD
devices.
6. Do not remove a replacement ESD device from its protective package until immediately before you are ready
to install it. (Most replacement ESD devices are packaged with leads electrically shorted together by
conductive foam, aluminum foil or comparable conductive materials).
7. Immediately before removing the protective material from the leads of a replacement ESD device, touch the
protective material to the chassis or circuit assembly into which the device will by installed.
CAUTION : BE SURE NO POWER IS APPLIED TO THE CHASSIS OR CIRCUIT, AND OBSERVE ALL OTHER
SAFETY PRECAUTIONS.
8. Minimize bodily motions when handing unpackaged replacement ESD 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 sufficient to damage an ESD device).
CAUTION. GRAPHIC SYMBOLS
THE LIGHTNING FLASH WITH APROWHEAD SYMBOL. WITHIN AN EQUILATERAL TRIANGLE, IS
INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF UNINSULATED
“DANGEROUS VOLTAGE” THAT MAY BE OF SUFFICIENT MAGNITUDE TO CONSTITUTE A RISK OF
ELECTRIC SHOCK.
THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE
SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE
LITERATURE.
- 1-4 -
Page 6
- 1-5 -
SPECIFICATIONS
SECTION MODEL FFH-286A/AD
General Power supply Refer to the back panel of the unit
Power consumption 30W
Mass 5.70kg
Extemal dimensions(W X H X D) 273
X 330 X 360mm
CD Frequency Response 40-18000Hz
Signal-to-noise ratio 70dB
Dynamic range 70dB
Tuning Range 87.5-108.0MHz or 65-74MHz, 87.5-108.0MHz
Intermediate Frequency 10.7 MHz
FM Signal-to-noise ratio 61/58dB
Frequency Response 60-10000Hz
Tuning Range 522-1611kHz or 530-1610kHz
AM Intermediate Frequency 450kHz
Signal-to-noise ratio 35 dB
Frequency Response 100-2000 Hz
AMP Output Power 5W + 5W
T.H.D 0.3%
Frequency Response 42-20000Hz
Signal-to-noise ratio 80dB
TAPE Tape Speed 4.75cm/sec
Wow Flutter 0.25% (MTT-111,JIS-WTD)
F.F/REW Time 120sec(C-60)
Frequency Response 250-8000Hz
Signal-to-noise ratio 43dB
Channel Separation 50dB(P/B)/45dB(R/P)
Erase Ratio 55dB (MTT-5511)
Speaker MODEL FE-286E
Type 1 Way 1 Speaker
Impedance 4Ω
Frequency Response 80-20000Hz
Sound Pressure Level 86dB/W(1m)
Rated Input Power 5W
Max.Input Power 10W
Net Dimension(W
X H X D) 180 X 326 X 165.8mm
Net Weight 1.67kg
NOTE : Specification are subject to change without notice in the course of product improvement.
TUNER
Page 7
- 1-6 -
MEMO
Page 8
- 2-1 -
TAPE DECK ADJUSTMENT
1. AZIMUTH ADJUSTMENT
Figure 1. Azimuth Adjustment Connection Diagram
CH1 CH2
Speaker Out
Playback Mode
Head
Test Tape
MTT-114
L ch
R ch
GND
Dual-trace
synchroscope
Electronic
Voltmeter
L out
R out
Unit
SECTION 2. ELECTRICAL
ADJUSTMENTS
This set has been aligned at the factory and normally will not require further adjustment. As a result, it is not
recommended that any attempt is made to modificate any circuit. If any parts are replaced or if anyone tampers
with the adjustment, realignment may be necessary.
IMPORTANT
1. Check Power-source voltage.
2. Set the function switch to band being aligned.
3. Turn volume control to minimum unless otherwise noted.
4. Connect low side of signal source and output indicator to chassis ground unless otherwise specified.
5. Keep the signal input as low as possible to avoid AGC and AC action.
Deck Mode Test Tape Test Point Adjustment Adjust for
A Deck Playback MTT-114 Speaker Out
DECK Screw
Maximum
Azimuth Screw
B Deck Playback MTT-114 Speaker Out Azimuth Screw Maximum
2. MOTOR SPEED ADJUSTMENT
Figure 2. Motor Speed Adjustment Connection Diagram
Head
Playback Mode
Unit
Speaker Out
GND
L out
R out
Record/Playback
head
Test Tape
MTT-111
Frequency Counter
Deck Mode Test Tape Test Point Adjustment Adjust for Remark
Normal Speed MTT-111 Speaker Out VR201 3kHz ± 1% A Deck
HI-Speed MTT-111 Speaker Out more than 5.4kHz HI-Speed Dubbing Mode
Page 9
- 2-2 -
3. RECORD BIAS ADJUSTMENT
Head
Unit
PN202
GND
Record/Playback
head
Test Tape
MTT-5511
Record/Playback
and Pause Mode
Frequency Counter
Deck Mode Test Tape Test Point Adjustment Adjust for
Rec/Pause MTT-5511
ERASE HEAD
L203
60kHz±5kHz (Auto stop)
WIRE(PN202) 85kHz±5kHz(Auto Reverse)
Figure 3. Record Bias Adjustment Connection Diagram
4. TUNER ADJUSTMENT
Figure 4. Tuner(S curve) Adjustment Connection Diagram
Unit
Signal Generator
GND
Electronic
OSCILLOSCOPE
FM Antenna
Terminal
Speaker
Item Test Point Adjustment Adjust for
DC Voltage Checker IC Pin 26, 28 L106 0V±50mV
(FM)
Page 10
- 2-3 -
TROUBLESHOOTING
Turn power on.
Is power on?
Does initial read work?
Does it play?
Does it output audio?
Check power supply circuit.
PN807 PIN5, 6.2V
PN807 PIN7, 5V
IC803 PIN 2, 3.3V
Check the connector
PN801, PN802, PN809
Check the tracking servo circuit.
Check the PN807 PIN1, 3
OK
YES
YES
YES
YES
YES
YES
NO
NONO
Check the DISK turns
Check the Laser
Check the focus circuit
Check the TRAKING circuit
NO
NO
Page 11
- 2-4 -
Fails to initial read
A
B
2V
5V
0V
5V
0V
1V
0V
1.2V
0V
0.8V
NO NO
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
Disc motor turns
Does RF waveform appear?
IC801 Pin3
Check the Data transmission from
PN809 pin11 to CD DSP
Check the Data transmission from
PN809 pin13 to MICOM
Check the change of SLDO
Voltage(IC801 pin23)
Check the change of SL +,
SL - Voltage
(IC802 pin 18, 19)
Check the Voltage change of PN 809
PIN20(OPEN, CLOSE)
Defective connector
PN809
Defective connector
PN809, Defective
MICOM
Defective connector
PN809, Defective
IC801
Defective IC801
Defective IC802
Defective contact PN802
Defective PICK-UP
Does laser light?
focus coil drive wareform.
TRACKING ERROR wareform
Is rotation normal?
Defective IC801
Defective PICK-UP
Is there no dropout of RF signal?
Does FA+ waveform appear at
IC802 pin13?
Does TE waveform appear at
801 pin 15?
Page 12
- 2-5 -
NO
NO
NO
NO
NO
NO
Laser does not light.
Is “3.5V” applied to pin of IC 801?
Is power supplied to laser Q801?
(Q 801 collector: about 1.8V)
Does laser current flow?
1.0V across R808
Is data transferred from
MICOM IC ?
Does voltage appear at IC
802 pin 17, 18?
Defective MICOM.
Defective MICOM.
Defective connector.
Defective IC 801, 802
Defective slide motor and/or
connector.
Defective LMT SW and/or
connector.
Defective Q 801 and/or laser.
Defective laser and/or
connector.
Did pickup return to
innermost circular?
Does it stop at inner pick
circular after shift?
Is defect output from LM
SW applied to pin 2 of
PN802?
R808»1.0V
R808«1.0V
YES
YES
YES
YES
OPEN
CLOSE
YES
YES
YES
YES
YES
YES
70
Page 13
- 2-6 -
B
NO
NO
NO
NO
NO
YES
YES
YES
YES
Laser lights
Does lens move up/down?
Check the signal of
FOCUS SEARCH
(IC801 Pin 21)
Chekc the signal of PN802
pin 13, 14
Does FE signal appear?
(IC801 pin 13)
Does DRF signal appear? (IC 801 pin67)
Defective IC801
Defective IC802
Open activator and/or connector
Defective IC801
Degraded laser diode
Defective PICK-UP
Page 14
- 2-7 -
(CH1)
(CH2)
1. HF signal (RF signal ) waveform
(IC801 pin 3) during normal play
2. EFM signal (IC801 pin 3)waveform
during Normal Play
3. Focus coil drive waveform(IC802 pin13)
• When focus search failed or there is no disc on the tray
• Focus coil drive waveform(FDO: IC801 pin21) and
DRF(IC801 pin67) when focus search is accomplished
4. Tracking coil drive waveform and TE during track
traverse
(1) When time division is 20mS/Div.1V/Div.
(2) When time division 1mS/Div, 1V/Div
(During forward track traverse)
(3) When time division is 0.5nS/div.
(During backward Track Traverse)
5. Feed motor drive waveform(IC 802 pin18)
During normal play
CH1 : FOCUS COIL DRIVE
SIGNAL 2V/Div.
CH2 : DRF
CH1 : TRACKING COIL DRIVE
SIGNAL 2V/Div. (IC802 pin27)
CH2 : TRACKING ERROR(TE: IC801 pin15)
1V/Div.
(
(
(
CH2 : TRACKING COIL DRIVE (IC802 pin27)
SIGNAL 2V/Div.
CH2 : TRACKING ERROR (TE: IC801 pin15)
1V/Div.
(
CH1 : TRACKING COIL DRIVE (IC802 pin27)
CH2 : TRACKING ERROR (TE: IC801 pin15)
(
0.5V/Div.
500nS/Div.
(
1S/Div.
1V/Div.
(
1mS/Div.
1V/Div.
(
0.5V/Div.
5µS/Div.
(
2S/Div.
0.5V/Div.
OV
OV
OV
(CH1)
(CH2)
(CH1)
(CH2)
(CH2)
OV
OV
OV
OV
OV
OV
OV
OV
OV
WAVEFORMS OF MAJOR CHECK POINT
Page 15
- 2-8 -
VKK PART
Does DC - 33V appear at
CN302 Pin .
Check the Voltage of
IC301 PIN .
Dose -33V appear at
ZD704(-)
Check the Q715
TURN ON
Check the PATTERN
Replace the Q715
Refer to power circuit
END
Check the -33V(LOW)
of C704
Replace the
ZD704(-33V)
Replace the D714,
D718, D715
YES
YES
NO
NO
P-SENS PART
Does +5V appear at ZD701?
Check the pattern of
IC301 Pin .
Check the waveform
of D713(Cathod).
Check the 5.6K of R714 and
replace ZD703(5.1V)
Replace the D713
YES
YES
NO
NO
14
28
51
Page 16
- 2-9 -
Power Circuit
Check the Fuse
Check the DC output
C736
Check the DC Output of C738
Check the output of
IC703, IC782, IC783
Check the 5V of CN513
Pin 7 (CD FUNCTION)
END
Replace the Fuse
Check the AC output of
CN701 Pin4, 5
Check the AC Output of
CN701 PIN 1, 3
Replace the IC782
Replace the D745, D746,
D747, D748
Check the D741, D742,
D744, D734 or Replace.
Check the IC703, IC782,
IC783 or Replace.
Check the Q713 “B”:HIGH,
Q711 “B”:LOW
Check the High of
Q713 “B” or Replace
Check the IC301
or Replace
Replace the Q713, Q711
Check the power Ass’y or
Replace the Transformer
Check the power Ass’y or
Replace the Transformer
Check the 5V of IC301
PIN 17,46,72,90
Check the High of
IC301 Pin 3.
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
Page 17
- 2-10 -
Audio abnormal
Check the output of
IC701 Pin 26, 27
Refer to “IC701
Troubleshooting”
Refer to “Muting
Troubleshooting”
Check the “High” of IC702 Pin 5.
Check the Voltage of IC702 Pin 7.
Check the power circuit.
Check the input of
IC702 Pin 2,4 (L-CH/R-CH)
Check the Output of IC702
Pin 12, 8 (L-CH/R-CH)
END
YES
YES
YES
NO
NO
NO
Muting circuit (MUTE)
Dose “High” appear at
Q712 “E”
check the “High”
Q721, Q771, “B”
MUTE
Check the “High” of Q712 “C”
Replace the TR
YES
YES
NO
Page 18
- 2-11 -
FUNCTION MODE Audio abnormal
TAPE
Check the signal input of IC401 pin 28, 37
Refer to “IC202 Troubleshooting”
AUX
Chekc the signal input of IC401, pin 29, 36
Check the signal input of JK401
Check the signal input of IC401 pin 31, 34
Check the signal of CN513 Pin 1, 3 or
Refer to “CD Troubleshooting”
Check the signal input of IC401 pin 30, 35
Refer to “IC102 Troubleshooting”
CD Tuner
Check the “LOW” of Q205 “B”
Refer to “IC504 Troubleshooting”
MIC
Page 19
- 2-12 -
Refer to “IC301
Troubleshooting”
IC301 Troubleshooting
IC203 Troubleshooting
Check the power supplying IC301 Pin 17, 46, 90?
Refer to “Power Circuit Troubleshooting”
Check the P-SENS
Replace the X301
Check the RESET circuit
Refer to “Power Circuit Troubleshooting”
Check the Data of IC301 Pin 3, 4,
(CD ➞ TAPE FUNCTION)
Replace the
IC203
Check the pattern
of (IC301, IC203)
Check the 5V of IC301 pin26
Check the oscillation of X301
When power supplying to IC301 pin17.
(High ➞ Low ➞ High)
Replace the IC301
Check the power supplying to IC203 pin 16
Check the CLK Data of IC203 pin 2, 3
Check the CONTROLL function
END
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
Page 20
- 2-13 -
IC401 Troubleshooting
Check the IC301 Pin85,86,75,76
Refer to “IC301
Troubleshooting”
Replace the IC401
Check the PATTERN of MICOM (85,86)
IC401 Pin 21,22
Replace the IC401
Check the power of IC401 Pin29.
Check the Pulse of IC401 Pin21,22
Check the signal output of IC401 Pin 32,33
Check the Signal output of pin25, 24
OK
YES
YES
YES
YES
YES
NO
NO
NO
NO
FM (TUN101)
Check the 10V input of TUN101 B+ 6
Check the “High” Voltage of TUN101 VT(5PIN)
Check the OSC waveform of TUN101 Pin 8
Refer to “IC102 Troubleshooting”
Check the 12V of Q102 “E”
Refer to “Power
Circuit Trouble-
shooting”
Check the “LOW” of IC103 Pin 7
Refer to “IC103
Troubleshooting”
Replace the Q102
Replace the TUN101
Replace the TUN101
YES
YES
YES
YES
YES
NO
NO
Page 21
- 2-14 -
IC102 Troubleshooting
Is power supplied to pin8(10V)
Check the waveform of Pin 20, 21
Check the output of Pin 16, 17
END
Refer to “Power Circuit
Troubleshooting”
Check the FM(TUN101) & AM(L107)
Replace the IC102
Replace the IC102
Check the “Low” of Pin 13
Refer to “IC103
Troubleshooting”
YES
YES
YES
YES
NO
NO
NO
NO
NO
IC103 Troubleshooting
Check the power supplying to pin 17
Check the oscillation of X104
Check the waveform of CE, DI, DO, CLK
Is the normal ?
END
Refer to “Power Circuit
Troubleshooting”
Replace the X104
Check the line or refer to “IC 301
Troubleshooting”
CE: Chip Enable
DI: Data Input(from u-com)
DO: Data Output(to u-com)
CLK: Tuner mode clock
Replace the IC103
YES
YES
YES
YES
NO
NO
NO
NO
Page 22
- 2-15 -
AM•COIL Troubleshooting
Check the “High” of L107 Pin 2
Refer to “IC103 Troubleshooting”
Replace the L107
Check the oscillation of L107 Pin 13
Refer to “IC102 Troubleshooting”
YES
YES
NO
NO
Play
Check the VCC supplying to IC202 pin 18
Refer to “Power Circuit Troubleshooting”
Check the Deck Mecha
Replace the Deck
Mecha.
Replace the IC202
Check the signal output of IC202 pin 5, 20
Check the Muting Circuit
YES
YES
YES
NO
NO
NO
YES
YES
NO
Dubbing(“NORMAL or REC “//“HIGH”)
Q252, 202 “OFF”//“ON” : R273, 223
“LOW”//“HIGH
Q253, 203 “ON”//“OFF” Refer to “IC203 Troubleshooting”
Refer to “REC Troubleshooting”
Page 23
- 2-16 -
REC (Q252, Q202 ON / R273, R223 High)
Check signal supplied to IC202 pin 11, 14?
Check the output of IC202 Pin9, 16
Check the IC201 pin6 : 12V and pin 4 : High
Check the power or Refer to “IC203
Troubleshooting”
Check the power
supplying to C236(+)
Check the 0.6V of Q208
“B”
Check the “Low” of
Q208 “C”
Replace the Q207
END
Check the Vcc power of IC202 Pin18
Check the oscillation of L203 pin 2, 3
Replace the DECK
Check the “Low” of Q253,
Q203 “B”
Replace the Q253, Q203
Refer to “IC203
Troubleshooting”
Refer to “Power Circuit
Troubleshooting”
Refer to “IC203
trouleshooting”
Replace the Q208
Replace the L203
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
NO
NO
Page 24
2-17 2-18
BLOCK DIAGRAM
NOTE: Warning
Parts that are shaded are critical With respect
to risk of fire or electrical shock.
NOTE:
1. Shaded(■) parts are critical for safety.Replace only
with specified part number.
2. Voltages are DC-measured with a digital voltmefer
during Play mode.
Page 25
SCHEMATIC DIAGRAMS
• MAIN SCHEMATIC DIAGRAM
2-19 2-20
NOTE: Warning
Parts that are shaded are critical With respect
to risk of fire or electrical shock.
NOTE:
1. Shaded(■) parts are critical for safety.Replace only
with specified part number.
2. Voltages are DC-measured with a digital voltmefer
during Play mode.
Page 26
2-21 2-22
• FRONT SCHEMATIC DIAGRAM
Page 27
2-23 2-24
• TUNER/DECK SCHEMATIC DIAGRAM
Page 28
2-25 2-26
• CDP SCHEMATIC DIAGRAM
Page 29
2-27 2-28
WIRING DIAGRAM
NOTE: Warning
Parts that are shaded are critical With respect
to risk of fire or electrical shock.
Page 30
2-29 2-30
PRINTED CIRCUIT DIAGRAMS
• MAIN P.C. BOARD (SOLDER SIDE)
Page 31
2-31 2-32
• MAIN P.C. BOARD (COMPONENT SIDE)
Page 32
2-33 2-34
• FRONT P.C. BOARD(COMPONENT SIDE)
Page 33
2-35 2-36
• FRONT P.C. BOARD(SOLDER SIDE)
Page 34
- 2-37 -
• CD MAIN P.C. BOARD
• AMP & POWER P.C. BOARD
NOTE: Warning
Parts that are shaded are critical With
respect to risk of fire or electrical shock.
Page 35
- 2-38 -
INTERNAL BLOCK DIAGRAM OF ICs
■ FAN8039BD3
5-CH Motor Diver
Description
The FAN8039BD3 is a monolithic integrated circuit suitable for a 5-CH motor driver which drives the
tracking actuator, focus actuator, sled motor, tray motor, spindle motor of the DVDP/CAR-CD systems.
28
2627
25 24 23 22
1 32 4 5 6 7
211920 18
17
16 15
8109
11
12
13 14
DO1-
DO
1+
IN1
REGVCC
REB
REO
RESX
GND1
FWD
IN2
DO2+
DO2-
GND2
REV
DO5+
DO 5-
DO3-
DO 3
+
IN3
CTL
VCC1
VCC
VREF
PS
IN4
DO 4+
DO4
-
GND3
TSD
10K
10K
10K
10K
2.5V
Regulator
Level
Shift
Level
Shift
COMP
2
2
2 2
2 2
FIN
(GND)
FIN
(GND)
Level
Shift
Level
Shift
10K
10K
Level
Shift
2
2
PS
RESX
FUNCTION
H
H
H
L
L
H
L
L
All Active
Reg. Only Deactive
Reg. Only Active
All Deactive
Pin Definitions
NO Symbol Description NO Symbol Description
1DO1-CH1 Drive Output (-) 15 GND2 Power Ground1 (CH 2,3,5)
2DO1+CH1 Drive Output (+) 16 DO5+ CH5 Drive Output (+)
3IN1 CH1 Drive Input 17 DO5- CH5 Drive Output(-)
4REGVCC Regulator Supply Voltage 18 DO3- CH3 Drive Output(-)
5REB Regulator Output 19 DO3+ CH3 Drive Output (+)
6REO Regulator Feedback Input 20 IN3 CH3 Drive Input
7RESX Regulator Reset 21 VCC1 Supply Voltage1(CH2,CH3,CH5)
8GND1 Signal Ground 22 PS Power Save
9CTL CH5 Motor Speed Control 23 VREF Bias Voltage
10 FWD CH5 Forward Input 24 VCC Supply Voltage(CH1,CH4)
11 REV CH5 Reverse Input 25 IN4 CH4 Drive Input
12 IN2 CH2 Drive Input 26 DO4+ CH4 Drive Output (+)
13 DO2+ CH2 Drive Output (+) 27 DO4- CH4 Drive Output (-)
14 DO2- CH2 Drive Output (-) 28 GND3 Power Ground2 (CH 1,4)
Page 36
- 2-39 -
■ KA78R33
Low Dropout Voltage Regulator
Description
The KA78R33 is a low-dropout voltage regulator suitable for various electronic equipments. It provides
constant voltage power source with TO-220 4 lead full mold package. Dropout voltage of KA78R33 is
below 0.5V in full rated current(1A). This regulator has various function such as peak current protection,
thermal shut down, overvoltage protection and output disable function.
Internal Block Diagram
THERMAL SHUTDOWN
BANDGAP REFERENCE
OVERVOLTAGE
PROTECTION
SOA PROTECTION
SHORTCIRCUIT
PROTECTION
1
4
3
2
Vin
Vdis
Vo
GND
HIGH / LOW
OUTPUT
ON / OFF
Q1
R1
R2
-
+
+
1.4V
-
CIRCUIT
■ LC72131
AM/FM PLL Frequency Synthesizer
Page 37
- 2-40 -
B01 B02 B03 B04 I01 I02
XIN
PD
AIN
AOUT
IFIN
XOUT
FMIN
AMIN
CE
DI
CL
D0
VDD
VSS
REFERENCE
DIVIDER
PHASE DETECTOR
CHARGE PUMP
UNLOCK
DETECTOR
UNIVERSAL
COUNTER
DATA SHIFT REGISTER
LATCH
12bits PROGRAMMABLE
DIVIDER
SWALLOW COUNTER
1/16. 1/17 4bits
POWER
ON
RESET
CCB
I/F
1
2
Block Diagram
■ LA1837
Single-Chip Home stereo IC with Electronic Tuning Support
The LA1837 is a single-chip AM/FM IF and MPX IC that supports electronic tuning and was developed for
use in home stereo systems. It is optimal for use in automatic station selection systems that use the SD and
IF counting techniques.
Block Diagram
FM SD
ADJ
3 rd 5 th
DECODER
ANTI-BIRDIE
FM
Page 38
- 2-41 -
■ KIA 78R12 PI
4 TERMINAL LOW DROP VOLTAGE REGULATOR
The KIA78RXX Series are Low Drop Voltage Regulator suitable for various electronic equipments. It
provides constant voltage power source with TO-220 4 termainal lead full molded PKG. The Regulator has
multi function such as over current protection, overheat protection and ON/OFF control.
Page 39
- 2-42 -
■ KIA7805AP/API
THREE TERMINAL POSITIVE VOLTAGE REGULATORS 5V, 6V, 8V, 9V, 10V, 12, 15V, 18V, 24V.
EQUIVALENT CIRCUIT
Block Diagram
Page 40
- 2-43 -
■ BA3126N
2-channel head switch for radio cassette recorders
Page 41
- 2-44 -
Control circuit
12-bit shift register
Latch
Output buffer
(open drain)
1Vss
2DATA
3CLOCK
4Q0
5Q1
6 Q2
7Q3
8Q4
16 VDD
15 Q11
14 Q10
13 Q9
12 Q8
11 Q7
10 Q6
9 Q5
Pin No.
Pin name Function
BU2090/F/FS BU2092/F BU2092/FV
111Vss GND
222DATA Serial data input
333CLOCK Data shift clock input
-44LCK Data latch clock input
455Q0parallel data output
566Q1parallel data output
677Q2parallel data output
788Q3parallel data output
899Q4parallel data output
91010Q5parallel data output
10 11 11 Q6 parallel data output
--12 N.C. Not connected
--13 N.C. Not connected
11 12 14 Q7 parallel data output
12 13 15 Q8 parallel data output
13 14 16 Q9 parallel data output
14 15 17 Q10 parallel data output
15 16 18 Q11 parallel data output
-1719OEOutput Enable
16 18 20 V
DD Power supply
PIN DESCRIPTION
■ BU2090F
12-bit, Serial IN, Parallel OUT driver
Block diagram
Page 42
- 2-45 -
REPAIRS REGARDING CD MECHANISM
IMPROVED METHOD - WHEN THE TRAY GEARS WERE DISTORTED
1. How to open the tray.
In case of not suppling power push two hooks (H) of the base, and them open the tray.
2. How to improve the distorted gears.
(1) Do the hole "C" of the cam gear to face forward the pick-up so the pick-up is down like figure.
(2) Do the hole "B" of main gear to face forward pick-up, too.
(3) Set the last part of main gear to point "A".
(4) Push the tray to end.
Page 43
- 2-46 -
MEMO
Page 44
3-1 3-2
SECTION 3. EXPLODED VIEWS
• CABINET AND MAIN FRAME SECTION
454
354
351
A26
A41
305
302
354
454
454
454
A00
A43
454
353
454
454
301
286
285
284
250
257
310
A46
303
261
291
292
293
294
(Option)
(Option)
286
278
280
279
277
264
260
NOTE) Refer to “SECTION 5 REPLACEMENT
PARTS LIST” in order to look for the
part number of each part.
Page 45
3-3 3-43-3 3-4
• TAPE DECK MECHANISM: AUTO STOP DECK(OPTIONAL)
400
011
503
401
401
009
010
501
502
013
406
409
408
407
032
031
030
029
028
401
027
026
014
015
403
504
024
025
023
405
A01
402
022
016
017
018
019
020
021
505
007
008
003
004
005
001
002
404
400
400
006
Page 46
3-5 3-6
• TAPE DECK MECHANISM: AUTO REVERSE DECK
400
011
503
401
401
009
010
501
502
507
508
013
406
409
410
036
032
038
034
035
039
029
040
031
028
027
026
014
015
403
504
024
025
023
405
A01
402
022
016
017
018
019
020
021
505
007
008
003
004
005
001
002
404
400
400
506
037
006
Page 47
3-7 3-8
• CD MECHANISM
416
151
156
418
169
173
171
170
419
163
422
165
159
164
417
417
416
166
167
177
175
172
184
421
162
153
168
155
421
421
184
417
417
184
A30
185
184
421
Page 48
- 4-1 -
SECTION 4. SPEAKER SECTION
MODEL: FE-286E
850
852
854
855
856
857
Page 49
- 4-2 -
MEMO
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