Cambridge Audio Azur 752BD User manual

Service Manual
Azur 752BD Universal Upsampling Blu-ray, DVD & CD player
Issue date: February 2013

2
TABLE OF CONTENTS
Chapter 1, About Maintenance 3
Chapter 2, Block Diagrams 4
Interior Image 6
Chapter 3, Function Module Schematics 7
Servo Circuit 8
Partial Introduction to Main Board System 9
Decoding Chip 10
Main Board Power Supply Circuit 11
Audio Processing Circuit 12
Video Processing Circuit 13
Other Control Circuits of Main Board 15
Panel and Button Control Circuits 16
Troubleshooting Flowcharts and Cases 17
Install Barcode 20
Precautions for Player Disassembly and Reassembly 24
Internal Structure of Unit 25
Remove the Audio Board 27
Replace the Main Board 29
Replace the Front Panel Assembly 31
Replace the Power Board 32
Circuit Diagrams 33
Parts Table 43
Packing Bill of Materials 44
Assembly Bill of Materials 45

Azur 752BDService Manual
3
Chapter One About Maintenance
1.1 Safety precautions
1.1.1 Power supply When maintenance personnel are repairing players ,he should pay special
attention to the power board with ~100V-240V and DC154V-300V which will cause hurt and damage to
persons!
1.1.2 When replacing accessories, please remove the power plug from socket to avoid any injures to
human body.
1.2 Precautions
1.2.1 Precautions for laser head
1ǃDo not stare at laser head directly for laser emission will occur when laser head is working
which will hurt your eyes!
2ǃDo not use wiping water or alcohol to clean laser head ,and you may use cotton swab.
1.2.2 About placement position
1ǃNever place player in positions with high temperature and humidity.
2ǃAvoid placing near high magnetic fields , such as loudspeaker or magnet .
3ǃPositions for placement should best able and secure.
1.2.3 Electro static precautions
1ǃMaintenance facility and working table must be earthed.
2ǃMaintenance man must wear electrostatic ring, and he can use antistatic gloves instead when
electrostatic ring is unavailable or inconvenient to use.
3ǃWhen repairing accessories, antistatic bag is required to pack the accessory.
1.2.4 Precautions for welding
1ǃThe soldering tin wire must satisfy the local environmental protection requirement.
2ǃWelding temperature must not above 350ć
1.3 Required device for maintenance
Digital oscillograph ( 100MHZ) ǃTV set(1080p)ˈreceiver˄support HDMI˅ǃSMD rework station
Multimeter ǃSoldering iron ǃPointed-pinchers ǃCutting nippers ǃForceps ǃElectric screw driver
Terminals connecting cord ǃTest disc etc.
-1-
Note: After replacing loader or main board,
please input BARCODE of the loader to main board again.
For input method, please refer to BARCODE input method on page 20.
-1-
-1-

4
7BDP752-0
Audio DAC Board
2BDP752-0 MAIN BOARD
2.1.1 752BD FRAME SCHEMATIC DIAGRAM
VCC
GND
AOMCLK
AOBCK
AOLRCK
GND
AOSDATA0
AOSDATA1
AOSDATA2
AOSDATA3
GND
AOSDATA4
AODATA5
SCL
SDA
DSD_PCM#
GND
GND
STBY_EN
AU_RESET
AU_AMUTE_MCU
VCC5_STB
TILT-
TILT+
TR-
TR+
FR-
FR+
CO_B+
CO_B-
CO_A+
CO_A-
VDACO#
AUX1
INH
INB
ING
INA
VCC_PDIC
IND
GND
DRFO+
DRFO-
GND
RFO+
RFO-
GND
INC
INE
VHAVC
INF
GND
GND
A3.3V
GND
VCC_LD
GND
VCC_BD_LD
GND
LDD_SDIO_OPU
LDD_CLK_OPU
LDD_SEN_OPU
GIO7
TEST_V
GIO4
GIO5
GIO6
GND
GND
TRAYIN
GND
TRAYOUT
LOAD+
LOAD-
A-
A+
B-
B+
GND
U
V
W
COMMON
5BDP751-0
Power Board
RELAY_ON
GND
+15V_IN
GND
GND
GND
+5V_STB
+5V_STB
-15V
GND GND +15V GND +12VF
BD LOADER KEM-480 (SONY)+TOHEI
Front Panel Board
3.3V_STB
IR_FP
STBY_KEY
OPEN/CLOSE_KEY
GND
PLAY_LEFT_RIGHT
UP_DOWN
3D INDICATE
GND
4K_2K INDICATE
VCC
VCC
VCC
GND
GND
VDATA
VSTB
VCLK
CN12
CN1
CN17 CN18
CN11
LAN
HDMI2
DIAG.
IR IN
USB1/2
HDMI IN
HDMI1
OPTCAL
RS-232C
Chapter Two Block diagram and version of player
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
15
14
13
12
11
10
9
..
1
MHL/HDMI
INPUT BOARD
MBDP752-0
GND
HDMI5V_IN_VBUS
GND
USBP1
USBM1
USB5V
MHL/HDMI IN
CN9
20PIN
CN26
CN2
Servo port
Mcu port
CN14 CN21
COAXIAL
NAND FLASH
port
CN6
OPTICAL/COAXIAL
INPUT BOARD
BBDP752-0
-2-

Azur 752BDService Manual
5
2.2.1 752BD OVERALL BLOCK DIAGRAM
MT8530
1st Digital Audio（I2S）
output
HDMI output
AOMCLK
I2S_BCLK_AOBCK
I2S_LRCK_AOLRCK
I2S_DATA_AOSDATAO
AOSDATA1# AOSDATA2# AOSDATA3#
I2S_DATA_AOSDATA4
AOSDATA5#
V_CBS
TXC- TXC+TX0- TX0+TX1- TX1+ TX2- TX2+
CN12
1st
I2S/DS
D
Audio
output
To DAC
HDMI
Terminal
Video filter
Q3 L16 etc
Diagnostic
port
Audio
Board
DAC board
Digital audio
Output
circuit
ASPDIF COXIAL
OPTICAL
Rear panel
USB Ports
Front panel
USB Ports
Sil1292
IR INPUT IR-IN
Module
MCU
PANEL KEY
LAN
RS232
ports
K4B1G1646G-BCH9
DDRⅡ1GX４
K9K8G08U0D-SCB0
NAND FLASH 1G
K4B1G1646
G-BCH9
DDR III
HDMI1
Terminal
TPIC
2050
50P
CN11
P9
CN18
SONY
Loader
KEM-
460 or
KEM-
480
P5
CN17 Loader
Frame
Marvell
88DE2755
HDMI output CVBS_OUT
COXIAL
ASPDIF
TO AUDIO
BOARD
TO BD loader
Spindle/sled motor
3 Axis actuator
Open/close
Driver
RF&Servo signal
RESET#
USBM1 USBP1USBM0 USBP0
USB
IR_MCU
IR_FP
IR_MCU
SDA SCL
Key in
UARXD UATXD
TD+ TD- RD+ RD-
12MHZ
Clock circuit
27MHZ
Clock circuit
25MHZ
Clock circuit
DDR_DATA
MEM_ADD
CCIR_OUT_C0~C7
CCIR_OUT_Y0~Y7
AO2I2SD0~D3
AO2I2S BCK MCLK LRCK
A
AOMCLK AOBCK
AOSDATA4 AOLRCK
Spindle/sled motor
Step motor
Sa-act BD
Servo driver signal
HDMI IN
RX2_0+/- RX2_1+/-
RX2-2+/- RX2_C+/-
ESD circuit HDMI
IN
ESD
Circuit
MHL/HDMI
IN
RX1_0+/- RX1_1+/-
RX1-2+/- RX1_C+/-
MHL/HDMI IN
MCU
Reset circuit
Reset circuit
ESD
Circuit LOAD+ LOAD-
TRAYIN# TRAYOUT#
LOADER
REAR PANEL
REAR PANEL
Front panel
FE_RESET Reset
circuit
Mt8580
-3-