Sony HCD-EP505 Service Manual
HCD-EP505
SERVICE MANUAL
Ver 1.0 2002.03
HCD-EP505 is the amplifier, CD
player , tape deck and tuner section
in CMT-EP505.
CD
Section
TAPE
Section
SPECIFICATIONS
AEP Model
UK Model
Chinese Model
Model Name Using Similar Mechanism HCD-EP50
CD Mechanism Type CS-21SC-1280
Model Name Using Similar Mechanism HCD-EP50
Tape T ransport Mechanism T ype CRL3439
AUDIO POWER SPECIFICATIONS:
(US model only)
POWER OUTPUT AND TOTAL
HARMONIC DISTORTION:
with 8 Ω loads both channels driven, from 120
- 10,000 Hz; rates 14 W per channel minimum
RMS power, with no more than 10% total
harmonic distortion from 250 mW to rated
output.
Amplifier section
AEP, UK models :
DIN power output (rated) 11 + 11 W
Continuous RMS power output (reference)
Music power output (reference)
Other models :
The following measured at AC 230 V or AC 120 V,
50/60 Hz
DIN power output (rated) 11 + 11 W
Continuous RMS power output (reference)
Outputs
PHONES: Accepts headphones of
(stereo mini jack) 8 Ω or more
SPEAKER: Accepts impedance of 8 to
(8 Ω at 1 kHz, DIN)
14 + 14 W
(8 Ω at 1 kHz, 10% THD)
27 + 27 W
(8 Ω at 1 kHz, DIN)
14 + 14 W
(8 Ω at 1 kHz, 10% THD)
16 Ω
CD player section
System Compact disc and digital
Laser Semiconductor laser
Frequency response 20 Hz - 20 kHz (±0.5 dB)
Tape player section
Recording system 4-track 2-channel stereo
Frequency response 50 - 13 000 Hz (±3 dB),
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range
Antenna FM lead antenna
Antenna terminal
Intermediate frequency 10.7 MHz
AM tuner section
Tuning range
European model: 531 -1 602 kHz
Other models: 531 - 1 602 kHz
audio system
(λ=780 nm)
Emission duration:
continuous
using Sony TYPE I
cassette
87.5 - 108.0 MHz
75 Ω coaxial
(with the interval set at
9 kHz)
(with the interval set at
9 kHz)
530 - 1 710 kHz
(with the interval set at
10 kHz)
Antenna
Intermediate frequency
General
Power requirements
Power consumption
European model:
Other models:
Dimensions (w/h/d):
Mass:
Supplied accessories: AM loop antenna (1)
Design and specifications are subject to change
without notice.
Supplied AM loop
antenna
450 kHz
230 V AC, 50/60 Hz
40 W
0.5 W (in the standby
mode)
40 W
Approx. 145 × 240 × 252 mm
Approx. 3.5 kg
Remote Commander (1)
Batteries (2)
FM lead antenna (1)
9-873-673-01 Sony Corporation
2002C0500-1 Home Audio Company
C 2002.03 Published by Sony Engineering Corporation
COMPACT DISC DECK RECEIVER
HCD-EP505
Notes on chip component replacement
•Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be damaged by heat.
Flexible Circuit Board Repairing
•Keep the temperature of the soldering iron around 270 ˚C during repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering
or unsoldering.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation exposure.
This appliance is classified as
a CLASS 1 LASER product.
The CLASS 1 LASER
PRODUCT MARKING is
located on the bottom.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED
LINE WITH MARK 0 ON THE SCHEMATIC DIA GRAMS
AND IN THE PARTS LIST ARE CRITICAL TO SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
2
TABLE OF CONTENTS
1. SERVICING NOTES ................................................ 4
2. GENERAL ................................................................... 5
3. DISASSEMBLY
3-1. Disassembly Flow ........................................................... 7
3-2. Front Panel Section......................................................... 8
3-3. MAIN Board ................................................................... 8
3-4. CD Cabinet Section......................................................... 9
3-5. CD Mechanism Deck (CS-21SC-1280) ......................... 9
3-6. Tape Mechanism Deck (CRL3439) ................................ 10
3-7. Cassette Lid..................................................................... 10
4. MECHANICAL ADJUSTMENTS....................... 11
5. ELECTRICAL ADJUSTMENTS......................... 11
6. DIAGRAMS
6-1. Block Diagram – TUNER Section – ............................. 15
6-2. Block Diagram – TAPE DECK Section –..................... 16
6-3. Block Diagram – MAIN Section –................................ 17
6-4. Block Diagram
– DISPLAY/POWER SUPPLY Section – ...................... 18
6-5. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 19
6-6. Printed Wiring Boards – MAIN Section – .................... 20
6-7. Schematic Diagram – MAIN Section (1/3) –................ 21
6-8. Schematic Diagram – MAIN Section (2/3) –................ 22
6-9. Schematic Diagram – MAIN Section (3/3) –................ 23
6-10. Printed Wiring Board – DISPLAY Section – ................ 24
6-11. Schema tic Diagr am – DISPLAY Section –................... 25
6-12. Printed Wiring Board – POWER Section –................... 26
6-13. Schema tic Diagram – POWER Section – ..................... 27
6-14. IC Pin Function Description ........................................... 29
HCD-EP505
7. EXPLODED VIEWS
7-1. Cabinet Section ............................................................... 31
7-2. Front Panel Section-1...................................................... 32
7-3. Front Panel Section-2...................................................... 33
7-4. CD Cabinet Section......................................................... 34
8. ELECTRICAL PARTS LIST ............................... 35
3
HCD-EP505
SECTION 1
SERVICING NOTES
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic break-down because of the potential difference generated
by the charged electrostatic load, etc. on clothing and the human
body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.
NOTES ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so as to be focused
on the disc reflective surface by the objective lens in the optical
pick-up block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objectiv e lens.
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
1. Press the I/1 button to the power ON with no disc inserted
and press the [CD] button.
2. Open the lid for CD.
3. Turn on SW300 as following figure.
4. Confirm the laser diode emission while observing the objecting lens. When there is no emission, Auto Power Control circuit or Optical Pick-up is broken.
Objective lens moves up and down five times for the focus
search.
SW300
4
LOCATION OF CONTROLS
– Front Panel –
Main unit
SECTION 2
GENERAL
HCD-EP505
This section is extracted from
instruction manual.
A – M
Cassette compartment qg
CD 4
DIR qj
DISPLAY 2
Display Window 5
ENTER qh
MEGA BASS 8
MUSIC MENU 9
P – Z
PHONES jack qk
PLAY MODE qj
PRESET +/– qd
RDS (European model
only)/DIR qj
Remote sensor 0
TAPE 3
TIMER indicator 1
TUNER 6
TUNER MEM qh
TUNING +/– qa
VOLUME control qs
@/1 (power) wd
CD
. m (go back) qa
M > (go forward) qa
nN (play) w;
X (pause) ws
Z PUSH OPEN/CLOSE 7
x (stop) ql
TAPE
M > (fast forward) qa
X (pause) ws
nN (play) w;
z (recording) wa
. m (rewind) qa
Z PUSH OPEN/CLOSE qf
x (stop) ql
5
HCD-EP505
Remote control
A – M
CD wf (8, 9, 15)
CLOCK/TIMER +/– w;
CLOCK/TIMER ON/OFF 2
CLOCK/TIMER SET 3
DISPLAY qa
ENTER qf
MEGA BASS qd
MUSIC MENU +/– qh
MUTING qg
P – Z
PLAY MODE/RDS (European
model only)/DIR 7
PRESET +/– 9
REPEAT 8
SLEEP 1
TAPE wd
TUNER/BAND 5
TUNER MEMORY qj
TUNING + q;
TUNING – qk
VOL (volume) +/– qs
tape function.
m (rewind) M (fast forward)
ql
. (go back) > (go forward)
X (pause) ws
nN (play) wa
`/1 (power) 4
x (stop) 6
w;
Setting the clock
1
Turn on the system.
2
Press CLOCK/TIMER SET on the
remote.
3
Press . or > on the remote
repeatedly to set the hour.
4
Press ENTER.
Press . or > on the remote
5
repeatedly to set the minute.
6
Press ENTER.
The clock starts working.
To adjust the clock
1 Press CLOCK/TIMER SET on the remote.
2 Press . or > on the remote to select
“SET CLK”, then press ENTER.
3 Do the same procedures as step 3 to 6 above.
Note
The clock settings are canceled when you disconnect
the power cord or if a power failure occurs.
6
• This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
SET
3-2. FRONT PANEL SECTION
(Page 8)
HCD-EP505
SECTION 3
DISASSEMBLY
3-3. MAIN BOARD
(Page 8)
3-4. CD CABINET SECTION
(Page 9)
3-5. CD MECHANISM DECK
(CS-21SC-1280)
(Page 9)
3-6. TAPE MECHANISM DECK
(CRL3439)
(Page 10)
3-7. CASSETTE LID
(Page 10)
7
HCD-EP505
)
r
Note: Follow the disassembly procedure in the numerical order given.
3-2. FRONT PANEL SECTION
4
claw
3
two screws
×
5)
(K3
1
two screws
(BTP2.6
×
10)
2
two screws
(BVTP3
×
10
3-3. MAIN BOARD
7
screw
(BTP2.6
5
7
8
front panel section
8
×
8)
connector
(SW300)
3
two screws
(K3
1
connector
(CN601)
×
5)
6
connector
(CN505)
9
3
two screws
(K3
2
connector
(CN305)
main board
×
5)
3
connecto
(CN7)
4
6
connector
(CN302)
5
connector
(CN303)
connector
(CN307)
8
3-4. CD CABINET SECTION
)
2
CD cabinet section
1
two screws
(BTP2.6
HCD-EP505
×
8
3-5. CD MECHANISM DECK (CS-21SC-1280)
6
two spring clamps
7
vibration proof rubber
(pink)
4
four fiber washers
3
four pulley screws
7
vibration proof rubber
(ORG)
5
8
CD mechanism deck (CS-21SC-1280)
two spring clamps
6
7
vibration proof rubber
(ORG)
7
vibration proof rubber
(pink)
1
two screws
(BVTP3
×
10)
2
CD cover housing
9
HCD-EP505
)
3-6. TAPE MECHANISM DECK (CRL3439)
2
tape mechanism deck
(CRL3439)
1
two screws
(BVTP3 × 10)
1
two screws
(BVTP3 × 10
3-7. CASSETTE LID
1
Open the cassette lid.
3
cassette lid
2
claw
2
claw
10
SECTION 4
MECHANICAL ADJUSTMENTS
HCD-EP505
SECTION 5
ELECTRICAL ADJUSTMENTS
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened
swab :
record/playback head pinch roller
erase head rubber belts
capstan idlers
2. Demagnetize the record/playback head with a head demagnetizer. (Do not bring the head magnetizer close to the erase head.)
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to the
parts adjusted.
5. The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
•Torque Measurement
Mode Torque Meter Meter Reading
FWD CQ-102C (30 – 70 g•cm)
FWD
Back Tension
FF CQ-201B (more than 60 g•cm)
REW CQ-201B (more than 60 g•cm)
CQ-102C (1.5 – 5.5 g•cm)
•Tape Tension Measurement
Mode Tension Meter Meter Reading
FWD CQ-403A
2.95 – 6.86 mN•m
(0.42 – 0.97 oz•inch)
0.15 – 5.39 mN•m
(0.021 – 0.076 oz•inch)
more than 5.89 mN•m
(more than 0.83 oz•inch)
more than 5.89 mN•m
(more than 0.83 oz•inch)
more than 100 g
(more than 3.53 oz)
PRECAUTION
1. Setting
MEGA BASS switch : OFF
TAPE DECK SECTION 0 dB=0.775 V
Test tape
Type Signal Used for
WS-48B 3 kHz, 0 dB Tape Speed Adjustment
Tape Speed Adjustment
Setting:
Function: TAPE
test tape
WS-48B
(3 kHz, 0 dB)
set
Procedure:
1. Playback WS-48B (tape center) in the FWD state.
2. Adjsut the volume in CAPSTAN/REEL motor so that the frequency counter reading becomes 3,000 Hz.
Specified Value: 2,910 to 3,090 Hz
3. Confirm that the frequency at the beginning and that at the
end of tape winding are between 2,955 to 3,045 Hz.
frequency counter
47 kΩ
+
–
MAIN board
SPEAKER terminal (CN503)
Adjustment Location:
CAPSTAN/REEL
motor
Tape Speed
Adjustment
Sample Value of Wow and Flutter: 0.3% or less W. RMS (JIS)
(WS-48B)
11
HCD-EP505
)
TUNER SECTION 0 dB=1 µV
[AM]
Setting:
Function : TUNER
Band switch: AM
AM RF signal
generator
30% amplitude
modulation by
400 Hz signal
Output level: as low as possible
[FM]
Setting:
Function : TUNER
Band switch: FM
FM RF signal
generator
22.5 kHz frequency
deviation by 400 Hz
signal
Output level: as low as possible
Put the lead-wire
antenna close to
the set.
set
MAIN board
0.01 µF
TP (FM ANT)
set
level meter
32 Ω
+
–
MAIN board
SPEAKER terminal (CN503
level meter
32 Ω
+
–
MAIN board
SPEAKER terminal (CN503)
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter
T406 450 kHz
AM FREQUENCY COVERAGE ADJUSTMENT
Adjustment Part Frequency Display Reading on Dig ital Voltmeter
T402 531 kHz 1.3 ± 0.1 V
Confirmation 1,602 kHz 7.1 ± 0.5 V
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
T401 603 kHz
TC401 1,404 kHz
FM FREQUENCY COVERAGE ADJUSTMENT
Adjustment Part Frequency Display Reading on Digital Voltmeter
Confirmation 87.5 MHz 1.4 to 1.6 V
Confirmation 108 MHz 7.3 to 8.5 V
Adjustment Location: MAIN board (See page 13)
digital voltmeter
MAIN board
TP (FM VT)
TP (AM VT)
100 kΩ
•Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
12
Adjustment Location and Connecting Points
HCD-EP505
– MAIN BOARD (Component Side) –
T406
AM IF Adjustment
AM Tracking Adjustment
TC401
{
T401
T402
AM Frequency
Coverage Adjustment
– MAIN BOARD (Conductor Side) –
TP
(FM VT)
TP
(FM ANT)
TP
(AM VT)
13
HCD-EP505
MEMO
14
6-1. BLOCK DIAGRAM – TUNER Section –
HCD-EP505
SECTION 6
DIAGRAMS
CN401
FM ANT
75Ω
COAXIAL
CN402
AM ANT
RF IN
1
T401
AM RF
TC401
T401, TC401
AM TRACKING
U401
FM TUNER PACK
VT
5
IF OUT
OSC OUT
D405
8
6
T402
AM OSC
T402
AM FREQUENCY
COVERAGE
CF401
10.7MHz
29
AMRF
OSC
FM IF AMP
Q403
AM
RF AMP
AM
OSC
AM
MIX
OSC
OSC OUT
30
CF402
10.7MHz
AMMIX
2
CF403
10.7MHz
T406
AM IF
FM/AM IF AMP,
AM RF AMP/MIX/OSC,
FM/AM DET, MPX
U402
FM-IN
1 23
CF404
450kHz
FM IF
AM-IF
427
FM
DET
AGC
FMDET
DETAM IF
(AEP, UK)
FMDET
9
BUFFER
Q405
L. P. F.
T404
T407
FM DET
24
22
AM DET
4
EMP IN
4.332MHz
13
XI
ANTI-ALIASING
FILTER
DECODER
AM/FM
IF BUFFER
X304
14
XO
OSC CLOCK
COMPARATOR
EMP OUT L IN L OUT
EMP OUT
IF OUT
13 14
RDS DECODER
IC305
PLL
1187.5Hz
PLL 57kHz
RDS/ARI
21 19 17
20
FM/AM BAND
SELECT SWITCH
L. P. F.
R-CH
FM/AM
Q404
BIPHASE
DECODER
MUTING
DEFERENTIAL
TULED6STLED
7
DECODER
R-CH
RCLK
RDATMUX
TU-L
TU-R
RCLK
16
RDATA
2
A
B
(Page 18)
(Page 17)
• R-ch is omitted due to same as L-ch.
• SIGNAL PATH
: FM
: AM
FM/AM PLL
U403
14 13 18
FMIN
AMIN
1/2
AOUT
SWALLOW
COUNTER
L. P. F
CHARGE PUMP
CHARGE PUMP
PROGRAMMABLE
SHIFT REGISTER & LATCH
PD
AIN
PHASE
PHASE
DETECTOR/
DETECTOR/
12 BIT
DIVIDER
UNLOCK
DETECT
X401
7.2MHz
1
XIN
REFERENCE
DIVIDER
20
XOUT
11
IFIN
UNIVERSAL
COUNTER
IO1
61017 16
BO1
CCB
INTERFACE
FM ON/OFF
STEREO
STATION
DI
3
CL
4
CE
2
DO
5
DA IN
CLOCK
PLL CE
DA OUT
D
E
(Page 18)
(Page 17)
1515
6-2. BLOCK DIAGRAM – TAPE DECK Section –
HPRE101 (1/2)
(RECORD/PLAYBACK)
L-CH
R-CH
R-CH
R-CH
7 9
R-CH
8
R-CH
REC/PB SWITCHING
U601
BIAS
TRAP
REC/PB
SWITCH
Q605
AMP GAIN
CONTROL
ALC
ALC
CONST
2
ALC
CONTROL
Q619
Q603
OUT1
REC/PB
SWITCH
Q601
ALC
IN1
4
3
D603
MUTING
Q607
6
(CrO
2
DETECT)
(HEAD POSITION DETECT)
(TAPE DETECT)
(PROTECT (FWD) DETECT)
(PROTECT (REV) DETECT)
TROUT
AMS
U603
V.N
1
BUFFER
Q625
R-CH
6
NF1
IN1
7
R-CH
ALC,
REC/PB AMP
U602
Q618
4
REC AMP
Q611
TAPE TYPE
SELECT SWITCH
Q609
R-CH
D308
BUFFER
Q613
D306
D305
SEL10
66
SEL12
68
SEL14
70
SEL15
71
RL-CH
RR-CH
R-CH
TL-CH
TR-CH
R-CH
SWITCHING
SYSTEM CONTROLLER
IC301 (1/3)
G
F
(Page 17)
(Page 18)
HPRE101 (2/2)
(ERASE)
BIAS OSC
L603
• R-ch is omitted due to same as L-ch.
• SIGNAL PATH
: TAPE PLAY
: RECORD
D601
BIAS OSC
Q615
R-CH
REC BIAS
SWITCH
Q617, 618
TAPE PLAY/REC DETECT
SENSOR
(CAPSTAN/REEL)
9V
(TRIGGER PLUNGER)
D313
D312
TIMER
M
z
CAPSTAN/REEL
MOTOR DRIVE
Q620, 621
TRIGGER
PLUNGER DRIVE
Q622, 624
LED
DRIVE
Q305
LED
DRIVE
Q304
90
96
95
93
18
13
16
SENSORA
AMS
MOTOR-ON
SOL
REC-LED
TIME
REC-EN
CD-EN
TU-EN
CD-EN
92
TU-EN
94
I
(Page 18)
1616
6-3. BLOCK DIAGRAM – MAIN Section –
HCD-EP505
(Page 16)
(Page 15)
L1
12
L2
11
L4
9
L3
10
DI
15CL14
SWITCH
INPUT SELECT
CE
SELECT SWITCH
LT36LT27LT1
8
CDDATA
14
CDCLK
88
CDRESET
15
LTOUT
SWITCH
LT4
LTCOM
516
4
CONTROL
SYSTEM CONTROLLER
IC301 (2/3)
3
SOUND
CIRCUIT
INPUT SELECT SWITCH,
ELECTRICAL VOLUME
U501
INPINENA
17
MUTE
21
MEGA BASS
CONTROL SWITCH
Q504
R-CH
2
LVROUTLVRIN
RVROUT
1
R-CH
30
D505
MUTING
Q501
R-CH
D506
MUTING
Q505
R-CH
D507
POWER AMP
HEADPHONE
AMP
U503
U502
R-CH
R-CH
CN503
SPEAKER
IMPEDANCE
USE 8Ω
+
–
–
+
PHONES
L
R
+9V
H501
CD BLOCK
CD \RESET
RL-CH
RR-CH
TL-CH
TR-CH
TU-L
TU-R
CD-L-IN
CD-R-IN
CD DO
CD CLK
R-CH
R-CH
R-CH
R-CH
F
B
(Page 15)
X2
80
X1
SOUNDENA
19
E
DA IN
CLOCK
DA OUT
PLL CE
STEREO
STATION
73
74
72
20
76
6
DATAOUT
CLK
DATAIN
PLLENA
STEREO
STATION
CD DOOR SW
EEPROMDATA
EEPROMCLK
79
91
75
77
X301
4.194304MHz
5
6
EEPROM
SDA
SCL
SW300
Z PUSH
OPEN/CLOSE
IC302
• R-ch is omitted due to same as L-ch.
• SIGNAL PATH
: TUNER
: CD PLAY
: TAPE PLAY
: RECORD
1717
6-4. BLOCK DIAGRAM – DISPLAY/POWER SUPPLY Section –
(Page 16)
(Page 15)
I
D
CD-EN, TU-EN
FM ON/OFF
REMOTE CONTROL
RECEIVER
X302
X303
VOLUME
ENCODER
SW301 – 317
ROTARY
X303
SYSTEM CONTROLLER,
LIQUID CRYSTAL DISPLAY DRIVER
IC301 (3/3)
85
REMOTEIN
97
ENCODERA
ENCODERB
98
CD-EN
D901 – 903
(LCD BACK LIGHT)
(EXCEPTAEP, UK)
(AEP, UK)
TU-EN
TAPE DECK SECTION B+
CAPSTAN/REEL MOTOR B+
D802
FM/AM PLL B+
FM/AM PLL,
RDS DECODER B+
9V
M12V
VT12V
FM CIRCUIT B+
REGULATOR
CONTROL SWITCH
Q804
B+ SWITCH
Q406
B+ SWITCH
Q401, 402
8V (CD)
CD BLOCK B+
+9V
REGULATOR
U801
+12V
REGULATOR
Q805
+12V
REGULATOR
Q808
+8V
REGULATOR
Q802, 803
+5V
REGULATOR
Q801
B+ AMP
POWER AMP B+
RECT
D202, 204
RECT
D206, 208
POWER
TRANSFORMER
(MAIN)
T201
RE201
POWER ON/OFF
RELAY DRIVE
Q205, 206
D804
LINE
FILTER
L201
AC IN
(Page 16)
LIQUID CRYSTAL
DISPLAY
CN301
SWITCHING
G
D301
D302
D303
D307
100, 1 – 4
23 – 26
32 – 59
60
61
62
63
64
69
KEY1 – KEY5
COM0 – COM3
SEG0 – SEG27
SEG28
SEG29
SEG30
SEG31
SEG32
SEG37
PWRFAIL
RESET
POWER
RDSDATA
RDSCLK
D801
5V (CPU)
SYSTEM CONTROLLER,
EEPROM B+
86
RESET
84
22
7
87
SWITCH
Q306
SWITCHING
Q301
RESET SIGNAL
GENERATOR
IC304
(AEP, UK)
BUFFER
Q302
RDATA
RCLK
A
(Page 15)
RECT
D212, 213,
D216, 218
POWER
TRANSFORMER
(SUB)
T202
1818
HCD-EP505
6-5. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
Note on Printed Wiring Boards:
• X : parts extracted from the component side.
• W : indicates side identified with part number.
f
•
• : Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
: internal component.
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and 1/
specified.
f
•
• C : panel designation.
Note: The components identified b y mark 0 or dotted line
• A : B+ Line.
• B : B– Line.
•Voltages are taken with a V OM (Input impedance 10 MΩ).
•Waveforms are taken with a oscilloscope.
• Circled numbers refer to waveforms.
• Signal path.
: internal component.
with mark 0 are critical for safety.
Replace only with part number specified.
Voltage variations may be noted due to normal production tolerances.
Voltage variations may be noted due to normal production tolerances.
F : FM
f : AM
E : TAPE PLAY
a : RECORD
J : CD PLAY
4
W or less unless otherwise
• Waveforms
– MAIN Board –
1 U403 w; (XOUT) (TUNER mode)
140 ns
2 Q65 (Collector) (REC mode)
12.4 Vp-p
17.8 µs
3.0 Vp-p
– DISPLAY Board –
3 IC301 ul (X1)
5.1 Vp-p
240 ns
4 IC305 qf (XO) (AEP, UK model)
1.8 Vp-p
230 ns
1919
6-6. PRINTED WIRING BOARDS – MAIN Section –
• Semiconductor Location
Ref. No. LocationRef. No. Location
D401 F-4
D402 F-3
D403 F-4
D404 F-4
D405 F-7
D501 I-11
D502 J-6
D503 I-6
D505 K-10
D506 L-9
D507 L-7
D508 G-5
D601 E-16
D603 G-15
D604 G-14
D605 N-12
D801 N-11
D802 L-11
D803 O-5
D804 O-5
D806 L-10
D808 O-10
D904 K-5
D905 J-5
Q401 G-4
Q402 C-4
Q403 E-7
Q404 C-10
Q405 B-11
Q406 B-10
Q501 H-5
Q502 I-5
Q503 I-6
Q504 J-6
Q505 L-9
Q506 L-8
Q601 D-12
Q602 E-15
Q603 D-13
Q604 D-15
Q605 C-13
Q606 D-15
Q607 F-13
Q608 F-14
Q609 F-13
Q610 F-12
Q611 G-8
Q612 G-9
Q613 I-13
Q614 I-13
Q615 C-15
Q616 F-15
Q617 G-15
Q618 G-15
Q619 F-13
Q620 M-13
Q621 M-13
Q622 N-13
Q624 N-13
Q625 H-14
Q801 N-7
Q802 M-10
Q803 M-10
Q804 L-9
Q805 N-8
Q808 O-5
U402 E-9
U403 C-7
U501 I-8
U502 L-6
U503 H-4
U601 C-14
U602 E-14
U603 G-13
U801 N-9
Z801 N-7
Z802 M-9
Z803 O-8
Z804 O-7
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
HPRE101
REC/PB/ERACE
A
BCE
B
MAIN BOARD
BCE
HEAD
U601
1
3
(AEP, UK)
B
C
E
B
B
C
C
E
E
U602
E
C
E
B
C
B
E
C
B
ECB
E
C
B
U603
BCE
B
B
C
C
E
E
C
D
E
F
G
H
I
J
HEADPHONE
BOARD
1
23
5
46
789
H501
PHONES
51
CN402
ANT
B
C
E
CN401
FM ANT
75Ω
COAXIAL
2
1
AM
1
2
BCE
8
FM TUNER
PACK
1
TP
(FM VT)
TP
(FM ANT)
TP
(AM VT)
AM ANT
U403
AM IF
ECB
AKA
5
1
2
354
AM OSC
1
2
3
6
4
2
1
U402
453
FM DET
453
2
1
2
1
ECBECB
E
C
B
453
U503
ECB
B
C
E
C
B
E
U501
BCE
B
C
E
B
C
E
(Page 24)
B
C
E
DISPLAY
BOARD
B
C
E
BCE
B
C
E
C
123
654
A
DISPLAY
BOARD
(Page 24)
BIAS
OSC
E
C
B
K
L
M
N
O
CN503
SPEAKER
(IMPEDANCE USE 8Ω)
∗CD
+
L
–
U502
ECB
+
R
–
EBC
POWER
BOARD
E
CN505
J98
C
B
E
BC E
BCE
U801
B
C
E
B
C
E
B
C
132
E
D605
DISPLAY
B
BOARD
DISPLAY
D
BOARD
B
C
E
EBC
E
C
E
C
B
B
BLOCK
∗SUPPLIED AS THE
ASSEMBLED BLOCK
TAPE
MECHANISM
BLOCK
(Page 26) (Page 24) (Page 24)
2020
6-7. SCHEMATIC DIAGRAM – MAIN Section (1/3) – • See page 19 for Waveform. • See page 28 for IC Block Diagrams.
HCD-EP505
CN402
AM ANT
CN401
FM ANT
75Ω
COAXIAL
MAIN BOARD
(AM VT)
TP
(FM ANT)
16V
TP
12.5[0.1]
(1/3)
12.4
12.4[0]
0[0.7]
FM: 0, AM: 0.7
00
0[3.5]
4.1
4.8
0
0
(AEP, UK)
2
U403
FM/AM PLL
IC B/D
4.1 (0)<0>
B+ SWITCH
7.6
4.8 (0)<0>
CN305
11P
50V
T402
T401,TC401
AM TRACKING
AM RF
5
1
6
2
34
TP
(FM VT)
11.7
[0]
Q401, 402
B+ SWITCH
AM FREQUENCY
COVERAGE
5
1
2
43
U402
FM/AM IF AMP,
AM RF AMP/MIX/OSC,
FM/AM DET, DET, MPX
IC B/D
9[0]
3.5
[0]
2.7[0]
FM IF AMP
2.7k
50V
50V
6.6[0]
4.34.34.34.33.23.22.9
16V
50V
50V
BAND SELECT SWITCH
50V
50V
50V
2.2
[2]
3.6 3.6 5.7 5.7 1.2 0.1 0 0
3.6
7.7
[8]
50V
15
2
3
T406
AM IF
16V
50V
3.7
0
3.2
3.2
[3.5]
3.63.6
4
[1.9]
[0.7]0[0.7]
[3.5]
6.6
7.7
7.7
[8]
[8]
50V
6.6
[3.7]
[6.9]
Q404
FM/AM
0[0.6]
2.7k
2.6
1.4
BUFFER
0.7
0 [2]
50V
50V
50V
fmin-fmax
FM:1.7 − 8.4
AM:1.2 − 7.1
2 [0]
4.1
0.9
0.9
2
1
(Page 22)
(Page 22)
CD
BLOCK
SUPPLIED
WITH THE
ASSEMBLED
BLOCK
1
MAIN
BOARD
(2/3)
2
MAIN
BOARD
(2/3)
CN101
A
5600P
50V
0 (0)
9P
2.7k
50V
2.7k
0 4 3.7 3.7 4 4 4 4 4 4 4 4 4
0 8 3.7 3.7 4 4 4 4 4 4 4 40 (0)
4.8
50V
<3.7>
0 (3.7)
<3.7>
<0>
0 (3.7)
<0>
5700P
4.7k
4700P
4700P
4.7U
50V
4.7U
50V
2.2U
50V
2.2U
50V
2.2U
50V
4.7U
50V
2.2U
4.7U
50V
50V
U501
INPUT SELECT
SWITCH,
ELECTRICAL
VOLUME
IC B/D
0.47U
50V
0.47U
50V
0
DTC343
0
Q501, 502
MUTING
0
0
Q503, 504
MEGA BASS
CONTROL
0
133
133
0
50V
0
0
DTC343
50V
133
CN303
11P
DISPLAY
BOARD
(Page 25)
(Page 23)
3
4
(Page 22)
B
DISPLAY
BOARD
(Page 25)
(Page 23)
MAIN
BOARD
5
(3/3)
BOARD
6
(Page 23)
MAIN
BOARD
(3/3)
MAIN
BOARD
(2/3)
MAIN
(3/3)
•Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
[]: AM
(): CD PLAY
<>: TAPE PLAY
2121
6-8. SCHEMATIC DIAGRAM – MAIN Section (2/3) – • See page 19 for Waveforms. • See page 28 for IC Block Diagrams.
HRPE101
RECORD/PLAYBACK/
ERASE
L-CH
R-CH
ERASE
MAIN BOARD
CN601
7P
AC16.4
(REC MODE)
(2/3)
1
2
3
2
BIAS OSC
Q615
BIAS
OSC
6
5
4
<0.4>
{6.5}
{0.1}
1500P
REC/PB SWITCHING
<0>
<0>
<0>
<7.7>
<0>{8.9}
<0>
<0>
<0.4>
{-0.4}<0>
50V
U601
SW R2
GND
SW P2
VCC
GND
CONT
SW P1
GND
SW R1
IC B/D
1500P
<0>
{2.9}
<0>{8.9}
REC/PB
SWITCH
50V
<9>{8.3}
<0>{2.9}
<0>{3.5}
U602
ALC,
REC/PB AMP
IC B/D
<0>{3}
9.1
<9>{0}
Q602
REC/PB
SWITCH
Q616, 617
REC BIAS SWITCH
<0>{0.7}
{0.1}<0.7>
<0>
{3.6}
<0.1>
<0.1>
{3}<0>
AMP GAIN
SWITCH
IN1
IN2
<0.7>{0.1}
Q603
<1.3>
<1.3>
50V
<0>
{0.4}<0>
4700P
2200P
50V
50V
<0> <0>
<1.4>
<3.7>
IN1
PC1
ALC
FM1
NF2
<1.4>
ALC
OUT1
<3.7>
2200P
<0>
OUT2
<0>
<0>
{0.4}
ALC
IN2RFVCC
Q604
AMP GAIN
CONTROL
<7.3>
CONST
<7.3>
4700P
PC2
50V
Q619
ALC
CONTROL
<0>
GND
50V
<0>{0.7}
INVERTER
50V
50V
<8.4>{0.1}
Q605
REC/PB
SWICTH
{0.1}
<0.7>
50V
<0>
<0>
<0>
U603
11.8 (11.8)
AMS
V. N
C. RNFNC
GND
TROUT
DIOUTV8VCC
0
0
<7.7>{6.9}
0.6
0.6
IC B/D
0 (0)<4.3>
Q622, 624
TRIGGER
PLUNGER
DRIVE
4
BUFFER
<2>
<2>
<2.5>{0}
{0}<4.9>
50V
<0>
<0>{0.7}
MUTING
50V
<0>{0.7}
MUTING
<0>
<0>
<0>
{0.7}
16V
50V
Q606
REC/PB
SWITCH
<0>
50V
50V
Q609, 610
TAPE TYPE
SELECT SWITCH
133
12
<10.8>
4.5
0
2SD1616
5
0 (0)<11.6>
2SB926TP
11.8 (11.8)
<0.1>
0 (0)<11.5>
0
0
Q620, 621
CAPSTAN/REEL
MOTOR DRIVE
CN307
CN302
TAPE
MECHANISM
BLOCK
SUPPLIED
WITH THE
ASSEMBLED
BLOCK
3P
C
DISPLAY
BOARD
(Page 25)
7
MAIN BOARD
(3/3)
(Page 23)
D
DISPLAY
BOARD
(Page 25)
7P
(Page 21)
1
MAIN BOARD
(1/3)
4
MAIN BOARD
(1/3)
(Page 21)
2
MAIN
BOARD
(1/3)
(Page 21)
4.6
REC AMP
7.9
50V
4.1
REC AMP
4.6
7.9
2.4
4.1
50V
16V
BUFFER
1.6
1
50V
2.4
1
50V
1.6
BUFFER
•Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : TUNER
(): CD PLAY
<>: TAPE PLAY
{ } : RECORD
2222
6-9. SCHEMATIC DIAGRAM – MAIN (3/3) Section – • See page 19 for Waveforms. • See page 28 for IC Block Diagrams.
HCD-EP505
(Page 21)
5
MAIN
BOARD
(1/3)
3
MAIN
BOARD
(1/3)
(Page
21)
MAIN BOARD
5.5
2SD1616
+5V
REGULATOR
50V
(3/3)
Q505, 506
MUTING
0
0
DTC343
50V
Q802, 803
2 (9.1) <2>
133
U801
+9V REGULATOR
9.1
13.9
6.1
16V
15.1
O
I
G
+12V REGULATOR
50V
11.9
133
15.1
12.3
15.1
0 (9.4)<0>
+8V REGULATOR
0 (9.5)<0>
0 (0.7)<0>
15.1
15.1 (8.6)
<15.1>
14.8 (0.1)<14.8>
REGULATOR
CONTROL SWITCH
50V
50V
50V
0
DTC343
0
HEADPHONE AMP
0.6
0.6
50V
U503
0
0
U502
POWER AMP
0.7
1.1
1.1
1.1
0.7
50V
8.1
18.5
18
CN503
4P
+
−
−
+
18
37.5
3.6
3.6
CN504
5P
R
L
CN503
SPEAKER
IMPEDANCE
USE 8Ω
6
MAIN
BOARD
(1/3)
(Page
21)
133
E
POWER
BOARD
CN505
(Page 27)
133
2SD1616
12.6
50V
16V
14.7
13.3
Q808
+12V REGULATOR
•Voltages and waveforms are dc with respect to ground
HEADPHONE BOARD
7
8
9
4
5
6
1
2
3
H501
PHONES
7
MAIN
BOARD
(2/3)
(Page 22)
under no-signal (detuned) conditions.
no mark : TUNER
(): CD PLAY
<>: TAPE PLAY
The components identified by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part number specified.
2323
6-10. PRINTED WIRING BOARD – DISPLAY Section –
• Semiconductor
Location
Ref. No. Location
D301 A-2
D302 A-2
D303 A-2
D305 A-1
D306 A-1
D307 A-2
D308 B-1
D309 C-5
D310 C-5
D311 D-2
D312 A-6
D313 C-4
D316 C-2
D317 C-2
D901 E-6
D902 E-6
D903 E-6
IC301 B-4
IC302 C-2
IC304 C-2
IC305 E-2
Q301 D-2
Q302 D-3
Q304 A-6
Q305 C-5
Q306 C-3
X302 B-2
A
B
C
SW315
MUSIC MENU
D
MAIN BOARD
CN302
(Page 20)
SW300
PUSH
OPEN/CLOSE
1 2 3 4 5 6
DISPLAY BOARD
LIQUID CRYSTAL DISPLAY
TIMER
51 50
MEGA BASS
IC302
1
7
31
X302
1
4
1
2
1
5
IC304
1
+
+
+
+
E
C
B
12 3
TUNER
75
76
75
IC301
100
1
CD
26
25
+
11
1
TAPE
2
DISPLAY
1
E
C
B
BC E
A
MAIN
BOARD
CN305
(Page 20)
D
E
B
MAIN BOARD
CN303
(Page 20)
11
13
C
MAIN BOARD
CN307
(Page 20)
4
3521
+
X303
ROTARY ENCODER
VOLUME
+
1
8
IC305
C
B
E
16
9
BC E
+
(AEP, UK)
SW311 SW310
+ −
SW314 SW313
+ −
PRESET
TUNING
2424
TUNER MEM
ENTER
SW301 − 312, 315 − 317
D303, SW317
PLAY MODE
DIR
SW305SW305
PLAY MODE
RDS/DIR
(AEP, UK)(EXCEPT AEP, UK)
+
12
INCLUDED IN
DISPLAY BOARD
D901 - 903
(LCD BACK LIGHT)
6-11. SCHEMATIC DIAGRAM – DISPLAY Section – • See page 19 for Waveforms. • See page 28 for IC Block Diagram.
DISPLAY BOARD
HCD-EP505
(AEP, UK) (EXCEPT AEP, UK)
SW305 SW305
PLAY MODE
PLAY MODE
RDS/DIR
DIR
SEL2215S-CD
TIMER
10V
Q306
50V
RESET
SWITCH
0
A0
A1
A2
A3
IC302
TUNER MEM/ENTER
TUNER MEM/ENTER
4
LED DRIVE
0
0
4.8
VCC
TEST
SCL
SDA
4.8
0
ROTARY
ENCODER
VOLUME
CN301
LIQUID CRYSTAL DISPLAY
TUNER/BAND
MUSIC MENU
0
TAPE
DISPLAY
50V
IC304
RESET SIGNAL
GENERATOR
X302
REMOTE CONTROL
RECEIVER
PRESET +
TUNING + TUNING −
MEGA BASS
33p
4.8
SUPPLY
GND
IN
GND
OUT
RPM7138-V4
OUT
5.2
5.4
5.8
PRESET −
J306
0
4.1
(0)
0
4.8
<4.1>
4.3
(4.3)
000
0
4.8
5.4
4.8
2.5
2.3
4.8
<0>
2.4
3
4.8
5.4
5.4
2 (0)
4.8
4.9
0
0
4.8 (0)
0
4.8
0
4.9
4.9
10V
4.9
4.9
4.9
0 (4.8)
4.9
5.4∗4.8
IC301
SYSTEM CONTROLLER,
LIQUID CRYSTAL
DISPLAY DRIVER
µPD780306GC-A68-8EU
4.9
0
1.5 (5.1) <1.5>
4.8
<0> {4.8}0<0> {4.8}
000
2.4
1.6
3.2
4.8
4.8
2.4
2.4
4.8
2.4
2.4
CD
4.8
4.8
23456789101113 12141516171819202122232425262728293031323334353637 1
SEL2910D SEL2910D SEL2910D
D901 − 903
LCD BACK LIGHT
0
∗
SWITCHING
IC305
RDS DECODER
50V
∗
4.2
∗
(AEP, UK)
4.2
10V
BUFFER
QUAL
∗
RDAT
2.1
VREF
2.1
MUX
4
VDD1
VSS1
0
VSS3
CMP
2.1
RCLK
VDD2
VSS2
NC
XO
T1
T2
XI
2
2
1.5
4
IC B/D
4
6.3V
SEL2215S-CD
<0> {0.7}
<4.3>
{0.2}
LED
D
MAIN BOARD
CN302
C
MAIN BOARD
CN307
(Page 22) (Page 22)
SW300
MAIN BOARD
A
CN305
(Page 21) (Page 21)
PUSH
OPEN/CLOSE
B
MAIN BOARD
CN303
•Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : TUNER
(): CD PLAY
<>: TAPE PLAY
: Impossible to measure
∗
2525
• Semiconductor
Location
Ref. No. Location
D201 B-5
D202 A-5
D203 B-5
D204 B-5
D205 C-5
D206 C-5
D207 C-5
D208 C-5
D212 A-3
D213 A-3
D215 A-3
D216 B-3
D217 A-3
D218 B-3
D221 B-3
Q205 C-3
Q206 C-3
6-12. PRINTED WIRING BOARD – POWER Section –
1 2 3 4 5
POWER BOARD
A
1234
Z201 C-4
B
C
POWER
TRANSFORMER
(SUB)
ECB
ECB
+
+
+
+
7
+
+
1
E
MAIN
BOARD
(Page 20)
D
AC IN
T201
POWER
TRANSFORMER
(MAIN)
4
3
2
1
2626
6-13. SCHEMA TIC DIAGRAM – POWER Section –
POWER BOARD
POWER
TRANSFORMER
(MAIN)
HCD-EP505
400µH
250V
AC IN
43
E
MAIN
BOARD
(Page 23)
CN505
7P
50V
21
6.1
5.3
0.7
6
Q205, 206
POWER ON/OFF
0.1
RELAY DRIVE
POWER
TRANSFORMER
(SUB)
25V
•Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : TUNER
The components identified by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part number specified.
2727
• IC Block Diagrams
– MAIN Board –
U402 LA1837L
U501 LC75392
U602 AN7312
OSC.BUFF
FM-SD.ADJ
AM-OSC
ALC
BUFF
FM
S-METER
FM
IF
1
FM-IN
SD
COMP
AM
OSC
S-CURVE
FM
DET
REG
28
AM
MIX
AM-RF-IN
REG
AM
RF. AMP
AM
AM/FM
IF-
BUFF
2 3 4 5 6 7 98
FM-IF
AM-MIX
U403 LC72131M-TL-M
VSS
AOUT
XOUT
1920
AIN
17
18
16
IF
S-METER
AM-IF
PD
FM-AFC
AGC
AM
TUNING
DRIVE
GND
AGC
GND
DET
FM-DET OUT
AM-DET OUT
TUNED
STEREO
VCC
VCC
15
VDD
MPX-IN
FM DET
AM. SD
FMIN
14
OUT L
OUT R
20 19 18 17 16
212223242527 262930
DECODER
ANT 1-BIRDIE
STEREO
VCO
FF
PHASE
FM. SD
STEREO
DRIVE
FF FF
DET
12
AMIN
13
PILOT
AM. SD ADJ
IO2
12
SW
DET
13
IF-BUFF
11
MUTE
IFIN
AMP-IN L
AM/FM
AMP-IN R
AMP OUT L
MUTE
AMP OUT R
15141110
VCO-STOP
LVROUT
LVRIN
LTOUT
LTCOM
LT4
LT3
LT2
LT1
VDD
1
–
+
2
3
4
5
6
7
8
L4
9
L3
10
L2
11
L1
12
13
CL
14
15
DI
+–+
–
LATCH
DECODER
SHIFT
REGISTER
CONTROL
+
–
30
RVROUT
–
+
29
RVRIN
28
RTOUT
27
RTCOM
RT4
26
25
RT3
RT2
24
RT1
23
R4
22
R3
21
R2
20
R1
19
VREF
18
VSS
17
16
CE
VCC
RF
14 13 12
RIPPLE FILTER
ALC
1 2 3
GND
ALC CONST
U603 BA335
COMPARATOR
AF AMP
ALC IN2
OUT2
11 10 9
AMP. CH2
AMP. CH1
4 5 6 7
OUT1
ALC IN1
PC2
PC1
NF2
NF1
IN2
8
IN1
REFERENCE
DIVIDER
CCB
INTERFACE
2
4
3
1
XIN
5
DI
CE
CL
DO
U601 µPC1330HA
PHASE
DETECTOR
CHARGE PUMP
UNLOCK
DETECTOR
SWALLOW COUNTER
1/16, 1/17 4BITS
12BITS
PROGRAMMABLE
DRIVER
DATA SHIFT REGISTER LATCH
9
6
8
7
BO4
BO2
BO1
BO3
INVERTER
10
POWER
RESET
IO1
1 2 3 4 5 6 7 8 9
NF
V. N
C. R.
1/2
ON
NC
GND
TROUT
DIOUT
V8
VCC
– DISPLAY Board –
IC305 BU1924F-E2 (AEP, UK)
VDD2
VSS2
XI
DIGITAL
T1
TEST
T2
UNIVERSAL
COUNTER
RCLK
PLL
1187.5Hz
BIPHASE
DECODER
DEFFERENTIAL
DECODER
1 43 65 872
NC
PLL 57kHz
RDS/ARI
COMPARATOR
8th SWITCHED
CAPACITOR
FILTER
ANTI-ALIASING
FILTER
XO
141516 13 121110 9
CLOCK
ANALOG
2
1
SW R1 GND SW P1
3
4
CONT
COMPARATER
5
VCC
GND
6
SW P2 GND
7 8 9
SW R2
QUAL
RDAT
VREF
MUX
VDD1
VSS1
VSS3
CMP
2828
HCD-EP505
6-14. IC PIN FUNCTION DESCRIPTION
• DISPLAY BOARD IC301 µPD780306GC-A68-8EU (SYSTEM CONTROLLER, LIQUID CRYSTAL DISPLAY DRIVER)
Pin No. Pin Name I/O Description
1 to 4 KEY2 to KEY5 I Key input terminal (A/D input)
5ANALYZER I Analyzer level detection signal input terminal (A/D input) Not used
6 STATION I Tuning detection signal input terminal
7RDSDATA I Serial data input from the RDS decoder (Used for the AEP, UK models)
8 AVDD — Power supply terminal
9AVREF I Reference voltage input terminal
10, 11
12 VSS — Ground terminal
13 TIME O LED drive signal output terminal
14 CDDATA I/O Two-way data bus with the CD block
15 CDRESET O Reset signal output to the CD block “L”: reset
16
17 INPINENA O Mega bass on/off selection signal output terminal “H”: mega bass on
18 REC-LED O LED drive signal output terminal
19 SOUNDENA O chip enable signal output foe the LC75392
20 PLLENA O PLL chip enable signal output to the FM/AM PLL “H” active
21 MUTE O Audio line muting on/off control signal output terminal “H”: muting on
22 POWER O System power on/off control signal output terminal “H”: power on
23 to 26 COM0 to COM3 O Common drive signal output to the liquid crystal display
27 BIAS O Bias output for the liquid crystal display drive
28 to 30 VLC0 to VLC2 I
31 VSS — Ground terminal
32 to 64 SEG0 to SEG32 O Segment drive signal output to the liquid crystal display
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
CDOUT1, CDOUT2
REC-EN
SEG33 O Segment drive signal output to the liquid crystal display Not used
SEL10 I Head position detect switch input terminal “L”: reverse direction, “H”: forward direction
SEG35 O Segment drive signal output to the liquid crystal display Not used
SEL12 I Cassette tape detect switch input terminal “L”: no cassette, “H”: cassette in
SEG37 O Segment drive signal output to the liquid crystal display Not used
SEL14 I
SEL15 I
DATAIN I Serial data input from the FM/AM PLL
DATAOUT
CLK O Serial data transfer clock signal output to the FM/AM PLL and LC75392
EEPROMDATA I/O Two-way data bus with the EEPROM
STEREO I FM stereo detection signal input terminal “L”: stereo
EEPROMCLK O Clock signal output to the EEPROM
VSS — Ground terminal
X2 O Main system clock output terminal (4.194304 MHz)
X1 I Main system clock input terminal (4.194304 MHz)
VDD — Power supply terminal
XT1 I Sub system clock input terminal (32.768 kHz) Not used
XT2 O Sub system clock output terminal (32.768 kHz) Not used
ONot used
O REC bias control signal output terminal
Input terminal for doubler circuit capacitor connection to develop liquid crystal display drive
voltage
Rec-proof claw (forward direction) detection signal input from the protect detect switch
“L”: recording possible, “H”: protect
Rec-proof claw (reverse direction) detection signal input from the protect detect switch
“L”: recording possible, “H”: protect
O Serial data output to the FM/AM PLL and LC75392
29
HCD-EP505
Pin No. Pin Name I/O Description
84
85
86
87
88
89
90
91 CD DOOR SW I
92
93
94
95 MOTOR-ON
96 AMS I
97 ENCODERA I Jog dial pulse input from the rotary encoder (VOLUME) (A phase input)
98 ENCODERB I Jog dial pulse input from the rotary encoder (VOLUME) (B phase input)
99 AVSS — Ground terminal
100 KEY1 I Key input terminal (A/D input)
RESET I
REMOTE I Remote control signal input from the remote control receiver
PWRFAIL I Power failure detection signal input terminal “L”: power failure, “H”: power on
RDSCLK I
CDCLK I Serial data transfer clock signal input from the CD block
SENSORB I Tape sensor input terminal Not used
SENSORA I Tape play/rec detect sensor input terminal “L” input when the tape play/rec detect
CD-EN O CD power on/off control signal output terminal
SOL O Trigger plunger drive signal output terminal “H”: trigger plunger on
TU-EN O Tuner power on/off control signal output terminal
System reset signal input from the reset signal generator “L”: reset
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”
Serial data transfer clock signal input from the RDS decoder
(Used for the AEP, UK models)
CD lid open/close detect switch (SW300) input terminal “L”: CD lid is closed
OMotor control signal output terminal
Whether a music is present or not from AMS is detected at auto music sensor
“L”: music is not present, “H”: music is present
30
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