Denon AVR-1404 User manual

SERVICE MANUAL
AV SURROUND RECEIVER
MODEL AVR-1404/484
For U.S.A., Canada, Europe,
Asia, China, Taiwan R.O.C.
& Korea model
16-11, YUSHIMA 3-CHOME, BUNKYOU-KU, TOKYO 113-0034 JAPAN
X0172V.01 DE/CDM 0306
Some illustrations using in this service manual are
slightly different from the actual set.
●
Please use this service manual with referring to the
operating instructions without fail.
●
For purposes of improvement, specifications and
design are subject to change without notice.
●
●
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。
●
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。
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。
注 意
Ver. 1

2
2AVR-1404/484
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.
(1)
(2)
500V
1M
(1)
(2)

3
3AVR-1404/484
DISASSEMBLY
(Follow the procedure below in reverse order when reassembling.)
1. Top Cover
(1) Remove 6 screws ①and 3 screws ②, detach the Top cover in the arrow direction.
2. Front Panel
(1) Remove 4 screws ③and 2 screws ④.
(2) Detach the Front Panel in the arrow direction.
3. Rear Panel
(1) Remove cord bushing ⑤from the Rear Panel.
(2) Remove 30 screws ⑥.
(3) Detach the Rear Panel in the arrow direction.
Top Cover
1
2
1
Front Panel
4
3
5
Rear Panel
6
6

4
4AVR-1404/484
LEVEL DIAGRAMS (1/2)
DIGITAL
40dB
30dB
20dB
6dB
10dB
40dB
30dB
20dB
10dB
0dB
- 10dB
- 12dB
- 18dB
- 18dB
- 35.5dB
15.5dB
25.5dB
25.5dB
15.5dB
SPK OUT
FRONT
2.83V
(1W
/ 8ohm)
SPK OUT
FRONT
H
/ P OUT
SPK OUT
2.83V
(1W
/ 8ohm)
SPK OUT
CENTER
SURROUND
MUTE
M62446
MUTE
DSP OUT
H
/ P OUT
47mV
(0.27W 8ohm)
- 20dBFS
- 10dBFS
0dBFS
A
/ D IN
REV AMP
A
/ D IN
REV AMP
A
/ DD
/ A
D
/ A OUT
LPF
DSP
HPF
REV AMP PRE AMP POWER AMP
M62446 MUTE
MUTE SUM S
/ W
ATT
SW SUM
REV AMP TONE ELECTRIC
VOLUME
DIR
INPUT
BUFFER
AMP
D
/ A
A
/ D
D
/ A
D
/ A OUT
100mV REF
D
/ A OUT
100mV REF
- 30dBFS
- 20dBFS
- 10dBFS
0dBFS
- 30dBFS
- 20dB
- 10dB
- 20dB
0dB
CD IN
FRONT
CENTER
SURROUND
6CH IN
6CH IN
6CH IN
6CH IN (200mV)
6dB
D
/ A
- 20dBFS
- 10dBFS
0dBFS
- 30dBFS
VOL 00
VOL 00
6CH IN
CD IN
(200mV)

5
5AVR-1404/484
LEVEL DIAGRAMS (2/2)
30dB
20dB
10dB
0dB
- 18dB 25.5
( 15.5 + 5 + 5 ) dB
SUB WOOFER
PRE OUT
150mV
SUB WOOFER
PRE OUT
M62446
MUTE MUTE
DSP OUT
D
/ A OUT
LPF REV AMP PRE AMP
SW SUM
REV AMP
ELECTRIC
VOLUME
D
/ A
- 10dB
- 5dB
- 20dB
- 30dB
SUB_WOOFER
6CH INPUT
6CH IN
(112mV)
6dB
6dB
5dB
TO FRONT CH
10.5dB
LFE
LFE
Front D
/ A Out
200mV ref
Config2
Config1
D
/ A
- 20dBFS
- 25dBFS
- 10dBFS
0dBFS
- 30dBFS
- 35dBFS
VOL 00
(200mV)

6
6AVR-1404/484
BLOCK DIAGRAM

7
7AVR-1404/484
ADJUSTMENT
FM ALIGNMENT
Input Output Adjustment
Step Alignment
Item
Tuning
Frequency
Setting Type Frequency Input
Level Modulation Coupling Type Connect to Points Adjust to
1Center
Adjustment
98.1MHz
(98.0MHz) FM SSG 98.1MHz 60dBPMono
1kHz 100%
Antenna
Terminal
Digital
Voltmeter R471 T402 r50mV
2 Distortion 98.1MHz
(98.0MHz) FM SSG 98.1MHz 60dBPMono
1kHz 100%
Antenna
Terminal
Distortion
Meter
Output
Terminal (L) T403 Minimum
Distortion
3 Repeat Steps 1 and 2
4 Signal Level 98.1MHz
(98.0MHz) FM SSG 98.1MHz 20dBPOFF Antenna
Terminal
Light “TUNED” on
FL Display VR402
Tuner Section
CONNECTION DIAGRAM OF MEASURING INSTRUMENTS


FM
STEREO
MODULATOR
FM SSG
Digital
Voltmeter
75ohm
T402 T403
IC402
VR402
TUNER B'D
R471
20 +14
−10 dB


AM
T402 T403
IC402
TUNER B’D
R471
VR401
AM ALIGNMENT
Output Adjustment
Step Alignment
Item Frequency Input Type Connect to Points Adjust to Remarks
1 Signal Level 999 (1000)
kHz AM SSG VR401 Light “TUNED” on
FL Display
SSG OUTPUT
74dBP(EMF)

8
8AVR-1404/484
Audio Section
Idling Current
Required measurement equipment : DC Voltmeter
Preparation
(1) Avoid direct blow from an air conditioner or an electric fan, and adjust the unit at normal room tempereture
15 °C ~ 30 °C (59 °F ~ 86 °F).
(2) Presetting
●POWER (Power sourse switch) →OFF
●SPEAKER (Speaker terminal) →No load (Do not connect speaker, dummy resistor, etc.)
Adjustment
(1) Remove top cover and set VR101, VR102, VR103, VR104, VR105 on Amp. Unit at full counterclockwise ( )
position.
(2) Connect DC Voltmeter to test points (FRONT-Lch: TP104, FRONT-Rch: TP105, CENTER ch: TP103,
SURROUND-Lch: TP101, SURROUND-Rch: TP102).
(3) Connect power cord to AC Line, and turn power switch "ON".
(4) Presetting. MASTER VOLUME : "---" counterclockwise ( min.)
MODE : 5CH STEREO
FUNCTION : CD
(5) Within 2 minutes after the power on, turn VR101 clockwise ( ) to adjust the TEST POINT voltage to 1.5 mV ±0.5 mV
DC.
(6) After 10 minutes from the preset above, turn VR101 to set the voltage to 2.5 mV ±0.5 mV DC.
(7) Adjust the Variable Resistors of other channels in the same way.

9
9AVR-1404/484
SEMICONDUCTORS
CXP740096 Terminal Function
Pin No. Pin Name I/O Function
1 9273 STB O TC9273 CONTROL
2 9273 9164 CLK O TC9273/TC9164 CONTROL
3 9273 9164 DAT O TC9273/TC9164 CONTROL
4 SW SUM O SW SUMMING CONTROL
5 SEL. CLK O SEL. CLK
6 ERR MUTE O ERR MUTE
7 89055 AUTO O LC89055 CONTROL
8 89055 AUDIO I LC89055 CONTROL
9 89055 EMPHA I LC89055 CONTROL
10 SRAM CE O SRAM (IC833) CONTROL
11 49326 ABOOT O CS49326 CONTROL
12 ROM 3 O ROM (IC807) CONTROL
13 ROM 30 O ROM (IC807) CONTROL
14 ROM 2 O ROM (IC807) CONTROL
15 49326 RST O CS94326 RESET
16 49326 CE O CS94326 CE
17 SCLK O LC89055/AK4527/CS49326 CLOCK
18 89055 CE O LC89055 CE
19 4527 CE O AK4527 CE
20 4527 RST O AK4527 RESET
21 9164 ST O TC9164 CONTROL
22 SW MUTE O SW MUTE
23 RELAY FRONT B O FRONT B RELAY


IC’s
CXP740096
(IC201)
PH7 PH6 PH5 PH4 PH3 PH2 PH1 PH0
PK7/TO1
RST
V
SS
XTAL
EXTAL
PK6/CS0
PK5/SI0
PK4/SO0
PK3/SCK0
PF7/AN11 PF6/AN10
PF5/AN9
PC6 PC7 PA0 PA1 PA2 PA3 PA4 PA5 PA6 PA7 NC V
DD
V
SS
PK1/TX PK2/TEX PI1/RMC PI2/NMI PI3/TO0/ADJ PI4/INT1/CS1 PI5/SCK1
PC5
PC4
PC3
PC2
PC1
PC0
PB7/SI2
PB6/SO2
PB5/SCK2
PB4/TO2
PB3
PB2
PB1
PB0
PJ7
PJ6
PJ5
PJ4
PJ3
PJ2
PJ1
PJ0
PD7
PD6
PD5
PD4
PD3
PD2
PD1
PD0
PI6/SO1
PI7/SI1
PE0/INT0
PE1/INT2
PE2/PWM0
PE3/PWM1
PE4
PE5
PE6
PE7
PG0/TxD
PG1/RxD
PG2/EC0
PG3/EC1
PG4/EC2
PG5/INT3
PG6/INT4
PG7/CINT
AN0
AN1
AN2
AN3
PF0/AN4
PF1/AN5
PF2/AN6
PF3/AN7
AV
DD
AV REF
AV SS
PF4/AN8
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
31
32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
100
99 98 97 96 95 94 93 92 91
90 89 88 87 86 85 84 83 82 81
21
22
23
24
25
26
27
28
29
30
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
TOP VIEW

10
10AVR-1404/484
24 RELAY FRONT A O FRONT A RELAY
25 RELAY SURR O SURROUND RELAY
26 RELAY CNT O CENTER RELAY
27 RELAY H/P O H/P RELAY
28 RELAY POWER O POWER RELAY
29 CNT MUTE O CENTER MUTE
30 FRONT MUTE O FRONT MUTE
31 VIDEO MUTE O VIDEO MUTE
32 SURR MUTE O SURROUND MUTE
33 NC
-
34 FL DRV RST O LC75721NE RESET
35 NC
-
36 NC -
37 NC -
38 SW ATT CTRL O SW. ATT. CONTROL
39 CINE EQ CTRL O CINEMA EQ. CONTROL
40 RESET I RESET
41 GND I
42 XTAL
-
43 EXTAL -
44 FL DRV CE O LC75721NE CE
45 FL DRV DATA O LC75721NE DATA
46 FL DRV/2090 CLK O CONTROL CLOCK
47 2090 DATA O BU2090F DATA
48 VOL DOWN I ENCODER INPUT (VOLUME)
49 VOL UP I ENCODER INPUT (VOLUME)
50 SEL DOWN I ENCODER INPUT (SELECT)
51 SEL UP I ENCODER INPUT (SELECT)
52 AVSS
-
53 VREF -
54 AVDD -
55 NC -
56 GND -
57 STEP OPT I AREA SELECT
58 SET OPT I MODEL SELECT
59 GND
-
60 KEY IN3 I KEY INPUT
61 KEY IN2 I KEY INPUT
62 KEY IN1 I KEY INPUT
63 9K/10K STEP I TUNER STEP SELECT
64 PROTECT I PROTECTION
65 89055 RST O LC89055 RESET
66 SDIN I LC89055/AK4527/CS49326 DATA INPUT
67 SDIO O LC89055/AK4527/CS49326 SDIO
68 ROM CE O ROM (IC807) CONTROL
69 FUNC DOWN I ENCODER INPUT (FUNCTION)
70 FUNC UP I ENCODER INPUT (FUNCTION)
71 NC
-
72 NC -
73 NC -
74 NC -
75 NC -
76 NC -
77 PWR DOWN I POWER DOWN DETECT
78 RDS CLK I TDA7330 CONTROL CLOCK
79 RDS DATA I TDA7330 CONTROL DATA
Pin No. Pin Name I/O Function