Denon DRA-CX3 Service Manual
Denon Brand Company, D&M Holdings lnc.
e
●
For purposes of improvement, specifications and
design are subject to change without notice.
●
Please use this service manual with referring to the
operating instructions without fail.
●
Some illustrations using in this service manual are
slightly different from the actual set.
注 意
サービスをおこなう前に、このサービスマニュアルを
必ずお読みください。本機は、火災、感電、けがなど
に対する安全性を確保するために、さまざまな配慮を
おこなっており、また法的には「電気用品安全法」に
もとづき、所定の許可を得て製造されております。
従ってサービスをおこなう際は、これらの安全性が維
持されるよう、このサービスマニュアルに記載されて
いる注意事項を必ずお守りください。
●
本機の仕様は性能改良のため、予告なく変更すること
があります。
●
補修用性能部品の保有期間は、製造打切後 8 年です。
●
修理の際は、必ず取扱説明書を参照の上、作業を行っ
てください。
●
本文中に使用しているイラストは、説明の都合上現物
と多少異なる場合があります。
Ver. 4
d
Please refer to the
MODIFICATION NOTICE.
SERVICE MANUAL
MODEL JP E3 E2 EK E2A E1C E1K EUT
DRA-CX3
33
AM-FM STEREO RECEIVER
X0314V.04 DE/CDM 0811
SAFETY PRECAUTIONS
The following check should be performed for the continued protection of the customer and service technician.
LEAKAGE CURRENT CHECK
Before returning the unit to the customer, make sure you make either (1) a leakage current check or (2) a line to chassis
resistance check. If the leakage current exceeds 0.5 milliamps, or if the resistance from chassis to either side of the
power cord is less than 460 kohms, the unit is defective.
CAUTION
Please heed the points listed below during servicing and inspection.
◎ Heed the cautions!
Spots requiring particular attention when servicing, such
as the cabinet, parts, chassis, etc., have cautions indicated
on labels or seals. Be sure to heed these cautions and the
cautions indicated in the handling instructions.
◎ Caution concerning electric shock!
(1) An AC voltage is impressed on this set, so touching in-
ternal metal parts when the set is energized could
cause electric shock. Take care to avoid electric shock,
by for example using an isolating transformer and
gloves when servicing while the set is energized, unplugging the power cord when replacing parts, etc.
(2)There are high voltage parts inside. Handle with extra
care when the set is energized.
◎ Caution concerning disassembly and
assembly!
Though great care is taken when manufacturing parts from
sheet metal, there may in some rare cases be burrs on the
edges of parts which could cause injury if fingers are
moved across them. Use gloves to protect your hands.
◎ Inspect for safety after servicing!
Check that all screws, parts and wires removed or disconnected for servicing have been put back in their original positions, inspect that no parts around the area that has been
serviced have been negatively affected, conduct an insulation check on the external metal connectors and between
the blades of the power plug, and otherwise check that
safety is ensured.
(Insulation check procedure)
Unplug the power cord from the power outlet, disconnect
the antenna, plugs, etc., and turn the power switch on. Using a 500V insulation resistance tester, check that the insulation resistance between the terminals of the power
plug and the externally exposed metal parts (antenna terminal, headphones terminal, microphone terminal, input
terminal, etc.) is 1MΩ or greater. If it is less, the set must
be inspected and repaired.
CAUTION
Concerning important safety
parts
◎ Only use designated parts!
The set's parts have specific safety properties (fire resistance, voltage resistance, etc.). For replacement parts, be
sure to use parts which have the same properties. In particular, for the important safety parts that are marked z on
wiring diagrams and parts lists, be sure to use the designated parts.
◎ Be sure to mount parts and arrange
the wires as they were originally!
For safety reasons, some parts use tape, tubes or other insulating materials, and some parts are mounted away from
the surface of printed circuit boards. Care is also taken with
the positions of the wires inside and clamps are used to
keep wires away from heating and high voltage parts, so
be sure to set everything back as it was originally.
Many of the electric and structural parts used in the set
have special safety properties. In most cases these properties are difficult to distinguish by sight, and using replacement parts with higher ratings (rated power and
withstand voltage) does not necessarily guarantee that
safety performance will be preserved. Parts with safety
properties are indicated as shown below on the wiring diagrams and parts lists is this service manual. Be sure to replace them with parts with the designated part number.
(1) Schematic diagrams ... Indicated by the z mark.
(2) Parts lists ... Indicated by the z mark.
Using parts other than the designated
parts could result in electric shock, fires or
other dangerous situations.
2
DRA-CX3
注 意
サービス、点検時にはつぎのことにご注意願います。
◎注意事項をお守りください！
サービスのとき特に注意を必要とする個所については
キャビネット、部品、シャーシなどにラベルや捺印で注意
事項を表示しています。これらの注意書きおよび取扱説明
書などの注意事項を必ずお守りください。
◎感電に注意！
(1) このセットは、交流電圧が印加されていますので通電
時に内部金属部に触れると感電することがあります。
従って通電サービス時には、絶縁トランスの使用や手
袋の着用、部品交換には、電源プラグを抜くなどして
感電にご注意ください。
(2) 内部には高電圧の部分がありますので、通電時の取扱
には十分ご注意ください。
◎分解、組み立て作業時のご注意！
板金部品の端面の『バリ』は、部品製造時に充分管理をし
ておりますが、板金端面は鋭利となっている箇所が有りま
すので、部品端面に触れたまま指を動かすとまれに怪我を
する場合がありますので十分注意して作業して下さい。手
の保護のために手袋を着用してください。
◎指定部品の使用！
セットの部品は難燃性や耐電圧など安全上の特性を持っ
たものとなっています。従って交換部品は、使用されてい
たものと同じ特性の部品を使用してください。特に配線
図、部品表にz印で指定されている安全上重要な部品は
必ず指定のものをご使用ください。
◎部品の取付けや配線の引きまわしは、
元どおりに！
安全上、テープやチューブなどの絶縁材料を使用したり、
プリント基板から浮かして取付けた部品があります。また
内部配線は引きまわしやクランパーによって発熱部品や
高圧部品に接近しないように配慮されていますので、これ
らは必ず元どおりにしてください。
◎サービス後は安全点検を！
サービスのために取り外したねじ、部品、配線などが元ど
おりになっているか、またサービスした個所の周辺を劣化
させてしまったところがないかなどを点検し、外部金属端
子部と、電源プラグの刃の間の絶縁チェックをおこなうな
ど、安全性が確保されていることを確認してください。
（絶縁チェックの方法）
電源コンセントから電源プラグを抜き、アンテナやプラグ
などを外し、電源スイッチを入れます。500V 絶縁抵抗計
を用いて、電源プラグのそれぞれの端子と外部露出金属部
［アンテナ端子、ヘッドホン端子、マイク端子、入力端子
など］との間で、絶縁抵抗値が１ MΩ 以上であることを
確認してください。この値以下のときはセットの点検修理
が必要です。
注 意
本機に使用している多くの電気部品、および機構部品は安
全上、特別な特性を持っています。この特性はほとんどの
場合、外観では判別つきにくく、またもとの部品より高い
定格（定格電力、耐圧）を持ったものを使用しても安全性
が維持されるとは、限りません。安全上の特性を持った部
品は、このサービスマニュアルの配線図、部品表につぎの
ように表示していますので必ず指定されている部品番号
のものを使用願います。
(1) 配線図…zマークで表示しています。
(2) 部品表…zマークで表示しています。
安全上重要な部品について
指定された部品と異なるものを使用した場
合には、感電、火災などの危険を生じる恐
れがあります。
3
DRA-CX3
CAUTION IN SERVICING
サービス時の注意事項
Initializing AM-FM RECEIVER
AM-FM RECEIVER initialization should be performed when
the µcom and peripheral parts of µcom are replaced.
1. Switch off the unit using the Main unit’s power operation
switch.
2. Hold the following the “CD” button and the “PRESET+”
button, and turn the Main unit’s power operation switch
on.
3. Check that the entire display is flashing with an interval of
about 1 second, and release your fingers from the 2 buttons and the microprocessor will be initialized.
Note:・If step 3 does not work, start over from step 1.
・ All user settings will be lost and this factory setting
will be recovered when this initialization mode.
So make sure to memorize your setting for restoring after the initialization.
AM-FM レシーバーの初期化について
マイコンやマイコン周辺部品等を交換した場合は、AM-FM
レシーバーの初期化を行って下さい。
1. 電源スイッチを OFF にします。
2. "CD" ボタンと "PRESET+" ボタンを同時に押しながら、
電源スイッチを ON にします。
3. ディスプレイ表示が約1秒間隔で点滅するのを確認後、
2つのボタンから指を離します。
＊マイコンが初期化されます。
注意 :・上記 3 の状態にならない場合は、もう一度操作 1
からやり直してください。
・初期化を行うとお客様が設定した内容が工場出
荷状態に戻りますので、あらかじめ設定内容を
控えておき初期化後再設定してください。
4
DRA-CX3
TROUBLESHOOTING
5
DRA-CX3
BLOCK & LEVEL DIAGRAM
6
DRA-CX3
WIRING DIAGRAM
7
DRA-CX3
SEMICONDUCTORS / 半導体一覧表
Only major semiconductors are shown, general semiconductors etc. are omitted to list.
主な半導体を記載しています。汎用の半導体は記載を省略しています。
IC's
M3062LFGPGP (IC501)
3
T
/IN
2
11
1
13
/D
/D
/D
3
4
5
1
P1
P
P1
REF
76
10
77
9
78
8
79
7
80
6
81
5
82
4
83
3
84
2
85
1
0
86
87
3
88
2
89
1
90
0
91
3
92
2
93
1
94
SS
95
0
96
97
98
4
99
4
00
1
1 2 3 4 5 6 7 8 9 10111213141516171819202122232425
P12/D
P11/D
P10/D
P07/AN07/D
P06/AN06/D
P05/AN05/D
P04/AN04/D
P03/AN03/D
P02/AN02/D
P01/AN01/D
P00/AN00/D
P107/AN7/KI
P106/AN6/KI
P105/AN5/KI
P104/AN4/KI
P103/AN
P102/AN
P101/AN
AV
P100/AN
V
AVcc
P97/AD
TRG/SIN
6
/ANEX1/S
P9
P95/ANEX0/CLK4
OUT
)
)
)
)
)
0
1
2
3
4
/D
/D
/-)
/D
/D
/D
1
2
0
3
4
5
(/D
(/D
(/D
(/D
(/D
1
/A
1
2
/AN
1
2
P
2
/A
22
/AN
2
P2
3
/A
23
/AN
3
P2
4
/A
4
2
/AN
4
2
P
(/D
5
/A
25
/AN
5
P2
4
5
0
T
T
/A
/IN
/IN
20
14
15
/AN
/D
/D
0
6
7
1
P2
P
P1
M16C/62P Group
)
5
/D
6
(/D
6
/A
26
/AN
6
2
P
)
6
/D
7
(/D
7
/A
7
2
/AN
7
P2
)
7
5
1
2
(/-/D
8
/A
0
CC2
SS
3
V
V
P
3
4
1
16
9
10
1
1
/A
/A
/A
/A
1
2
3
4
P3
P3
P3
P3
57585960616263646566676869707172737475
17
1
1
/A
/A
/A
/A
/A
7
0
1
5
6
P3
P4
P4
P3
P3
515253545556
50
P42/A
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
18
P43/A
19
P44/CS0
P45/CS1
P46/CS2
P47/CS3
P50/WRL/WR
P51/WRH/BHE
P5
2
/RD
P53/BCLK
P54/HLDA
P55/HOLD
P56/ALE
P57/RDY/CLK
P60/CTS0/RTS
P61/CLK
P62/RxD0/SCL
P63/TXD0/SDA
P64/CTS1/RTS1/CTS0/CLKS
P65/CLK
P66/RxD1/SCL
P67/TXD1/SDA
P7
P7
P72/CLK2/TA1
OUT
0
0
0
0
1
1
1
0/TXD2
/SDA2/TA0
OUT
OUT
(Note)
/V
1
/RxD2/SCL2/TA0IN/TB5IN(Note)
1
BLOCK DIAGRAM
Port P08Port P18Port P28Port P38Port P48Port P58Port P6
Internal peripheral functions
Timer (16-bit)
Output (timer A): 5
Input (timer B): 6
Three-phase motor
control circuit
Watchdog timer
(15 bits)
DMAC
(2 channels)
D-A converter
(8bitsX2channels)
3
3
IN
/TB4
1
/DA
4
P9
IN
/TB3
0
/DA
3
9
P
OUT
/S
IN
/TB2
2
P9
<V
CIN
IN
/S
IN
/TB1
1
P9
CC2
Expandable up to 26 channels)
CRC arithmetic circuit (CCITT )
COUT
/X
BYTE
7
/CLK3
/X
CNVss
RESET
6
IN
P8
P8
/TB0
0
P9
ports>
A-D converter
(10 bitsX8 channels
UART or
clock synchronous serial I/O
(8 bitsX3 channels)
(Polynomial : X
16+X12+X5
M16C/60 series16-bit CPU core
R0LR0H
R1H R1L
R2
R3
A0
A1
FB
OUT
X
IN
SS
X
CC1
V
/NMI
V
/INT
5
4
P8
P8
/INT
3
P8
/INT
2
8
P
IN
/TA3
7
P7
OUT
/TA3
6
7
P
/W
IN
/TA2
5
P7
/W
OUT
/TA2
4
P7
/V
IN
/TA1
2
/RTS
2
/CTS
3
P7
/U
/U
IN
4
OUT
/TA
1
/TA4
0
P8
P8
0
1
2
8
<V
CC1
ports>
Port P7
8
System clock generator
X
PLL frequency synthesizer
Clock synchronous serial I/O
+1)
IN-XOUT
X
CIN-XCOUT
Ring oscillator
(8 bitsX2 channels)
<V
CC1
ports>
Port P8
7
Port P8
5
Memory
Port P9
8
Port P10
8
INTB
PC
SB
USP
ISP
FLG
ROM
(Note 1)
RAM
(Note 2)
Multiplier
<V
CC1
ports> <V
Port P118Port P14
(Note 3) (Note 3)
2
CC2
ports>
Port P128Port P13
(Note 3)
(Note 3)
8
Note 1: ROM size depends on microcomputer type.
Note 2: RAM size depends on microcomputer type.
Note 3: Ports P11 to P14 exist only in 128-pin version.
8
DRA-CX3
Terminal Function
Pin No. Port Name I/O Initial Function
1 NC O - Not Used.
2 FL_RESET O L Reset output to driver built into FL display tube.
3 TONE_DATA O L Data output to TC9184AP. (20bit)
4 TONE_STROBE O L Strobe output to TC9184AP.
5 TONE_CLOCK O L Clock output to TC9184AP. (below 500kHz)
6 BYTE I - External data bus width switching input. (GND : Single chip mode)
7 CNVSS I - Processor mode switching input. (GND : Single chip mode, PULL DOWN)
8 NC O L Not Used.
9 NC O L Not Used.
10 RESET I - Reset input.
11 XOUT O - Oscillator output. (16 MHz)
12 VSS I - GND.
13 XIN I - Oscillator output. (16 MHz)
14 VCC1 I - Power supply.
15 NC I - Not used. (PULL UP)
16 O.CURRENT/
O.VOLTAGE
17 AC OFF I - Power failure detection input.
18 DBRXD I - Not used. (GND)
19 OSC O L Oscillation frequency control output of power supply unit.
20 H/P_SW I - Headphones connected/disconnected detection input.
21 ENC_B I - Rotary encoder B terminal input.
22 ENC_A I - Rotary encoder A terminal input.
23 FL_CS O L Chip selection output to driver built into FL display tube.
24 LED_O O L Power LED control signal output. ( Orange, STANDBY, H:turn on)
25 LED_R O L Power LED control signal output. (Red, POWER ON, H:turn on)
26 DABCLK O L Not used.
27 DABRXD I - Not used. (GND)
28 DABTXD O L Not used.
29 IPOD_TX O L Data output to i-Pod. (Use even when updating program.)
30 IPOD_RX I - Data input from i-Pod. (Use even when updating program.)
31 NC O L Not used.
32 NC O L Not used. (Terminal for RDS test)
33 S1_DIN I - GND. (DAB ready communication input)
34 S1_DOUT O L Not used. (DAB ready communication output)
35 NC O L Not used.
36 NC O L Not used.
37 NC O L Not used.
38 NC O L Not used.
39 EPM O L Use for updating program.
40 E2P_CLK O L Clock output to EEPROM.
41 E2P_DO I - Data input from EEPROM.
42 E2P_DI O L Data output to EEPROM.
43 E2P_CS O L Chip selection output to EEPROM.
44 CE O L Use for updating program.
45 NC O L Not used.
46 NC O L Not used.
47 PWB_CHECK I - PWB checking mode input.
48 PWB_CHECK I - PWB checking mode input.
49 PWB_CHECK I - PWB checking mode input.
50 PWB_CHECK I - PWB checking mode input.
51 NC O L Not used.
52 NC O L Not used.
53 NC O L Not used.
54 PHONO O L Output for input selection relay. (H : select PHONE)
55 CD O L Output for input selection relay. (H : select CD)
56 LINE1 O L Output for input selection relay. (H : select LINE1)
57 LINE2 O L Output for input selection relay. (H : select LINE2)
I - Overcurrent / overvoltage detection input of power supply unit.
(Low pulse of a microsecond or more .)
(Use for updating program.)
(Active : Low edge)
9
DRA-CX3
Pin No. Port Name I/O Initial Function
58 LINE3 O L Output for input selection relay. (H : select LINE3)
59 TU_POWER O L Tuner power ON/OFF control. (H : Tuner ON)
60 VCC I - Power supply.
61 TUNER O L Output for input selection relay. (H : select TUNER)
62 VSS I - GND.
63 RDS_RST O L Reset output to RDS IC.
64 STEREO I - Tuner stereo signal detection input.
65 TUNED I - Tuner reception detection input.
66 T.MUTE O L Tuner MUTE output.
67 RDS_CE O L Chip enable output to tuner RDS IC.
68 RDS_DATA O L Data output to tuner RDS IC.
69 RDS_CLK O L Clock output to tuner RDS IC.
70 RDS_DO I - Data input from tuner RDS IC.
71 Not used I - GND. (Not used)
72 PROTECT I - Power Amp. Error detection input.
73 REMOTE I - IR remote controller input.
74 IPOD_CONNECT I - i-Pod connected/disconnected detection input. (H : Connected)
75 IPOD_POWER O L i-Pod power supply ON/OFF control output.
76 ENA O L Signal output to stop oscillator of Power Amp.
77 SP_MUTE O L SP MUTE output. (H: MUTE ON)
78 DIRECT O L SOURCE DIRECT RELAY control output.
79 H/P_MUTE O L Headphone MUTE output. (H: MUTE ON)
80 AC_RELAY O L Power ON/OFF control. (H : Tuner ON)
81 NC O L Not used.
82 REC O L REC MUTE output. (H: MUTE ON)
83 VOL_DATA O L Data output to TC94A32FG. (24bit)
84 VOL_CLOCK O L Clock output to TC94A32FG. (below 1MHz)
85 VOL_STROBE O L Strobe output to TC94A32FG.
86 NC O L Not used.
87 THERMO I - Power Amp. Overheating detection input.
88 USA O L Not Used.
89 EURO I - Product destination selection input. (JAPAN : L, EURO : H)
90 TEMP I - Power unit overheating detection input.
91 FREQ I - TUNER's skip frequency switching input.
92 RDS I - RDS YES/NO selection input. (H : YES, L : NO)
93 KEY0 I(AD) - Main unit's operating button detection input.
94 AVSS I - GND for AD converter.
95 KEY1 I(AD) - Main unit's operating button detection input.
96 VREF I - Reference voltage input for AD converter and DA converter.
97 AVCC I - Power supply of AD converter.
98 NC O L Not used.
99 FL_DA O L Serial data output to driver built into FL display tube.
100 FL_CLK O L Serial clock output to driver built into FL display tube.
10
DRA-CX3
DA428440E-E (IC702)
d
BLOCK DIAGRAM
Control chip
OCM 6
VDCK 10
VSCK 8
DCG 7
ENA 4
TEST 19
IN1- 17
AGND1- 16
Non-inverting
IN2+ 15
AGND2+ 14
VDD 22
AGND
1,9,12,21
VSS 2,11,20
SYN 5
Inverting
Current Prot / HF Prot
Voltage
check
Rec.
Soft
Limit
Rec.
Soft
Limit
COM/MECC
Control ch1
COM/MECC
Control ch2
Shnchro
Circuit
Comp
arator
Comp
arator
Driver chip1
Level
shift
Reciever
DeadTime
Level
shift
Reciever
DeadTime
Driver chip2
Current
etect
Current
detect
Current
detect
Current
detect
High
drive
Low
drive
High
drive
Low
drive
25 ZB1
23 FB1
32 PWMFB1
27 VD1
28 VD1
31 PWM1
26 VDR1
29 VS1
30 VS1
33 SUB
34 VS
36 VD2
37 VD2
40 PWM2
38 VS2
39 VS2
35 VDR2
THM 3
NC
13,18,24,43
Thermal
Warning
Current Prot / HF Prot
NTC
41 PWMFB2
44 FB2
42 ZB2
11
DRA-CX3
Terminl Function
Pin No. Pin Name Function
1 AGND Analog ground for control chip power supply.
2 VSS Negative power supply for control chip (-5V).
3 THM Thermal Monitor
Error signal of open collector output “L” for two conditions.
1. Over temperature limitation.
2. Over temperature warning. By connecting to the ENA pin, thermal shutdown is set.
4 ENA Bi-direction input/output.
The input “H” enables to start switching and the input “L” disables.
Input is including hysteresis for glitch free enable of the system.
When the protection circuit detects the over voltage condition, the open collector output turns on.
5 SYN The switching frequency can be synchronized with frequency of this pin signal to avoid the influence
6 OCM Over Current Monitor
7 DCG This high impedance output generates a current in case of over voltage condition on the power stage
8 VSCK This high impedance input for monitoring negative power stage.
9 AGND Analog ground for control chip power supply.
10 VDCK This high impedance input for monitoring positive power stage.
11 VSS Negative power supply for control chip (-5V).
12 AGND Analog ground for control chip power supply.
13 NC
14 AGND2 Input reference for channel 2.
15 IN2+ High impedance audio input for channel 2.
16 AGND1 Input reference for channel 1.
17 IN1- High impedance audio input for channel 1.
18 NC
19 TEST Test terminal connect to VSS.
20 VSS Negative power supply for control chip (-5V).
21 AGND Analog ground for control chip power supply.
22 VDD Positive power supply for control chip (+5V).
23 FB1 Feedback for global loop of channel 1.
24 NC
25 ZB1 For estimating the power dissipation in the zobel resister,
26 VDR1 Positive supply for driver chip of channel 1 with respect to VS1; (VS1+10V).
27 VD1 Positive supply for power stage of channel 1.
28 VD1 Positive supply for power stage of channel 1.
29 VS1 Negative supply for power stage of channel 1.
30 VS1 Negative supply for power stage of channel 1.
31 PWM1 PWM output of channel 1.
32 PWMFB1 Feedback for inner loop of channel 1.
33 SUB Substrate of IMST.
34 VS Negative supply for power stage.
35 VDR2 Positive supply for driver chip of channel 2 with respect to VS2;(VS2+10V).
36 VD2 Positive supply for power stage of channel 2.
37 VD2 Positive supply for power stage of channel 2.
38 VS2 Negative supply for power stage of channel 2.
39 VS2 Negative supply for power stage of channel 2.
40 PWM2 PWM output of channel 2.
41 PWMFB2 Feedback for inner loop of channel 2.
42 ZB2 For estimating the power dissipation in the zobel resister,
43 NC
44 FB2 Feedback for global loop of channel 2.
for AM radio tuner.
Normal condition is “L”.
Error signal of open collector output “L” for two conditions.
1. Over current limitation.
2. For monitoring the state of control and average voltage across the zobel resistor in case of of-limit
conditions.
voltage (VD/VS).
This current is designed to turn-on a set of discharge transistors.
This monitoring controls the soft clipping circuit and the over voltage shutdown.
This monitoring controls the soft clipping circuit and the over voltage shutdown.
This is true inverting low impedance (1kohm) input for avoiding ground loop noise.
This input is non-inverting.
This is true non-inverting low impedance (2kohm) input for avoiding ground loop noise.
This input is inverting.
this input is sensing the zobel voltage via a resistive network of channel 1.
this input is sensing the zobel voltage via a resistive network of channel 2.
12
DRA-CX3
TC9184AP (IC307)
PIN CONNECTION
BLOCK DIAGRAM
13
DRA-CX3
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