BBK BBK931S User manual

SERVICE MANUAL
BBK931S

CONTENTS
1. SAFETY PRECAUTIONS
1.1 GENENRAL GUIDELINES
2. PREVENTION OF ELECTRO STATIC DISCHARGE(ESD)TO ELECTROSTATICALLY
SENSITIVE(ES) DEVICES
3. PRECAUTION OF LASTER DIODE
4. GENERAL DESCRIPTION
5. PREVENTION OF STATIC ELECTRICITY DISCHARGE
5.1 GROUNDING FOR ELECTROSTATIC BREAKDOWN PREVENTION
5.1.1 WORKTABLE GROUNDING
5.1.2 HUMAN BODY GROUNDING
5.1.3 HANDING OF OPTICAL PICKUP
5.2 HANDING PRECAUTIONS FOR TRAVERSE UNIT(OPTICAL PICKUP)
6. ASSENBLING AND DISASSEMBLING THE MECHANISM UNIT
6.1 DISASSEMBLY PROCEDURE
6.2 TERMINAL PCB
6.3 CLAMP PLATE UNIT
6.4 TRAY
6.5 TRAVERSE BLOCK
6.6 TRAVERSE GEAR
6.7 OPTICAL PICKUP UNIT
6.7.1 PRECAUTIONS IN OPTICAL PICKUP REPLACEMENT
6.8 DISASSEMBLING THE MIDDLE CHASSIS
6.9 DISASSENBLING THE TRAVERSE GRAR A
6.10 DISASSEMBLING THE SPINDLE MOTOR UNIT
7. ELECTRICAL CONFIRMATION
7.1 VIDEO OUTPUT(LUMINANCE SIGNAL)CONFIRMATION
7.2 VIDEO OUTPUT(CHROMINANCE SIGNAL)CONFIRMATION
8. MPEG CHECK WAVEFORM
9. IC BLOCK DIAGRAM & DESCRIPTION
10. SCHEMATIC & PCB WIRING DIAGRAM
11. SPARE PARTS LIST
9
2
2
2
3
4
6
6
6
6
6
7
7
7
8
8
9
10
10
12
12
13
13
13
15
14
18
35
50
6
1

1.SAFETY PRICAUTIONS
1.1 GENERAL GUIDELINES
1.When servicing,observe the original lead dress.ifa short circuit is found,replace all parts which have
been overheated or damaged by the short circuit.
2.After servicing,see to it that all the protective devices such as insulation bamiers,insulation papers
shields are properly installed.
3.After servicing,make the following leakage current checks to prevent the customer from being exposed
to thock hazards.
2.PREVENTION OF ELECTRO STATIC DISCHARGE(ESD) TO ELECTROSTATECALLY
SENSITIVE(ES) DEVICES
Some semiconductor(solid state)devices can be damaged easily by static electricity.Such components
commonly are called Electrostatically Sensitive(ES)Devices.Examples of typical ES devices are integrated
circuits and some field-effect transistorsand semiconductor chip components.The following techniques
should be used to help reduce the incidence of component damage caused by electro static discharge(ESD).
1.Immediately before handling any semiconductor component or semiconductor-equipped assembly,drain
off any ESDon your body by touching a known earth ground.Alteatively,obtain and wear a commercially
availabel discharging ESD wrist strap,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 ES devices,place the assembly on a conductive
surface such as alminum foil,to prevent electrostatic charge buildup or exposure of the assembly.
3.Use only a grounded-tip soldering iron to solder or unsolder ES devices.
4.Use only an anti-static solder removal device.Some solder removal devices not classified as anti-static
(ESD protected)can generate electrical charge sufficient to damage ES devices.
5.Do not use freon-propelled chemicals.These can generate electrical charges sufficient to damage ES
devices.
6.Do not remove a replacement ES device from its protective package until immediately before you are
ready to install if.(Most replacement ES devices are packaged with leads electrically shorted together by
conductive foam,alminum foil or comparable conductive material).
7.Immediately before removing the protective material from the leads of a aeplacement ES device,touch
the protective material to the chassis or circuit assembly into which the device will be installed.
Caution
Be sure no power is applied to the chassis or circuit,and observe all other safety precautions.
8.Minimize bodily motions when handling unpackaged replacement ES devices.(Otherwise hamless motion
such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can
generate static electricity(ESD)
2
notice (1885x323x2 tiff)

3. Precaution of L aster Diode
3

5.PREVERTION OF STATIC ELECTRICITY DISCHARGE
The laser diode in the traverse unit (optical pickup)may brake down due to static electricity of clothes or human
body.Use due caution to electrostatic breakdown when servicing and handling the laser diode.
5.1.Grounding for electrostatic breakdown prevention
Some devices such as the DVD player use the optical pickup(laser diode)and the optical pickup will be damaged
by static electricity in the working environment.Proceed servicing works under the working environment where
grounding works is completed.
5.1.1. Worktable grounding
1.Put a conductive material(sheet)or iron sheet on the area where the optical pickup is placed,and ground thesheet.
5.1.2.Human body grounding
1 Use the anti-static wrist strap to discharge the static electricity form your body.
5.1.3.Handing of optical pickup
1.To keep the good quality of the optical pickup maintenance parts during transportation and before
installation,the both ends of the laser diode are short-circuited.After replacing the parts with new ones,
remove the short circuit according to the correct procedure.(See this Technical Guide).
2.Do not use a tester to check the laser diode for the optical pickup .Failure to do so willdamage the laser
diode due to the power supply in the tester.
5.2.Handing precautions for Traverse Unit (Optical Pickup)
1.Do not give a considerable shock to the traverse unit(optical pickup)as it has an extremely high-precise
structure.
2.When replacing the optical pickup,install the flexible cable and cut is short land with a nipper.See the
optical pickup replacement procedure in this Technical Guide.Before replacing the traverse unit,remove
the short pin for preventingstatic electricity and install a new unit.Connect the connector as short times as
possible.
3.The flexible cable may be cut off if an excessive force is applied to it.Use caution when handling the cable.
4.The half-fixed resistor for laser power adjustment cannot be adjusted.Do not turn the resistor.
safety_3 (1577x409x2 tiff)

6.ASSEMBLING AND DISASSENBLING THE MECHANISM UNIT
6.1Disassembly Procedure
6.2 Terminal P.C.B.
1.Unscrew the screws.
2.Remove the solders.
3.Remove the connectors
５

6.3 Clamp Plate Unit
1.Spread the stopper with hand to silde the tabs and remove the clamp plate unit.
6.4 Tray
1.Lift the tray.
６

6.5 Traverse Block
1.Lift the traverse block while spreading the hook of the mechanical chassis chassis unit.
2.Disengage the tabs from the holes of the mechanical chassis unit.
6.6. Traverse Gear
1.Disengage the tabs from the traverse gear
2.Remove the traverse gears B and C.
７

5.6 Mechanism Unit
1.Unscrew the screws.
2.Remove the connectors.
5.7 Terninal P.C.B.
1.Unscrew the screws
2.Remove the solders.
3.Remove the connectors.
6.7. Optical Pickup Unit
1. Unscrew the screws.
2.Remove the spring holders and the springs.
3.Pull out of the drive shaft and guide shaft.

The optical pickup can be damaged by static electricity from you body.Be sure to take static electricity countermeasures
when working around the optical pickup.(Refer to the related page in this Manual about the countermeasures.
1.Do not touch laser diode,actuator and their peripheries.
2.Do not use tester to check laser diode.(Laser diode can be damaged easily.)
3.The use of soldering iron with anti-static feature is recommended when providing short-circuit to laser diode or when
-When using the soldering iron without anti-static feature,short-circuit the flexible cable terminal with a clip before
removing it.
4.Solder the land on flexible cable of optical pickup unit.

6.8. Disassenbling the Middle Chassis
1.Remove the holders pins.
2.Remove the tab.
3.It lifts while pulling it in the direction of the arrow.
6.9. Disassenbling the Traverse Gear A
1.Remove the traverse gear A.

7. Electrical Confirmation
7.1. Video Output (Luminance Signal) Confirmation
DO this confirmation after replacing a P.C.B.
Purpose:To maintain video signal output compatibility.
1.Connect the oscilloscope to the video output terminal and terminate at 75 ohms.
2.Confirm that luminance signal(Y+S)level is 1000mVp-p±30mV
Measurement point
Video output terminal Color bar 75% PLAY(Title 46):DVDT-S15
PLAY(Title 12):DVDT-S01
DVDT-S15
or
DVDT-S01
Mode Disc
Measuring equipment,tools
200mV/dir,10 sec/dir 1000mVp-p±30mV
Confirmation value

7.2. Video Output (Chrominance Signal) Confirmation
Do the confirmation after replacing P.C.B.
Purpose:To maintain video signal output compatibility.
1.Connect the oscilloscope to the video output terminal and terminate at 75 ohme.
2.Confirm that the chrominance signal(C)level is 621 mVp-p±30mV
Measurement point
Video output terminal Color bar 75% PLAY(Title 46):DVDT-S15
PLAY(Title 12):DVDT-S01
DVDT-S15
or
DVDT-S01
Mode Disc
Measuring equipment,tools Confirmation value
Screwdriver,Oscilloscope
200mV/dir,10 sec/dir 621mVp-p±30mV

SAM0357-070600 ESS Technology,Inc.
ES4428 PINOUT
Figure 1 ES4428 Pinout
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
LCS1#
LOE#
LD0
VSS
LCS3#
LCS2#
AUX0
LA21 LA20
RESET#
VC33
TSD3
HIOCS16#/EAUX3[4] HA1/EAUX4[3] VSS HA0/EAUX4[2] HWR#/DCI_CLK#/EAUX4[5] HRD#/DCI_ACK#/EAUX4[6] HD4/DCI[4]/EAUX[4] HD5/DCI[5]/EAUX[5] HD6/DCI[6]/EAUX[6] HD2/DCI[2]/EAUX[2] HD3/DCI[3]/EAUX[3] VC33
VC25
DB8
VC25
DB5
DB9
DCS0#
VC25
VSS
TSD0/SEL_PLL0 TSD1/SEL_PLL1
TDMFS
TDMCLK
TDMDR
TDMTSC#
TWS/SEL_PLL2
VC33
LA4 LA5 LA6 LA7 LA8 LA9
VSS
VC25
LA10
LA11
LA12 LA13 LA14 LA15 LA16
VSS
VC33
LA17 LA18 LA19
TDMDX/RSEL
VSS
TSD2
SPDIF/SEL_PLL3
NC
VSS
MCLK
TBCK
VC33
VC33
VSS
VSS
DQM
RSD
RWS
RBCK
APLLCAP
XIN
XOUT
AVCC (APLL)
DSCK
VSS
DB15
DB13
DB11
DB1
VSS
DRAS2#/DBANKSEL1
DRAS0#
DOE#/DSCK_EN
VC33
DMA9
DMA7
VSS
DMA5
DMA3
VC33
DCS1#
DB14
DB12
DB10
DB0
VC33
DRAS1#/DBANKSEL0
DWE#
DCAS#
VSS
DMA8
DMA6
VC33
DMA4
DMA2
VSS
DB7
DB6
VSS
DB4
DB3
DB2
DMA11
DMA10
DMA1
DMA0
HCS3FX#/EAUX3[6] HCS1FX#/EAUX3[7] VSS HIORDY/EAUX3[3] VSS HD13/EAUX2[5] HD12/EAUX2[4] HD11/EAUX2[3] HD10/EAUX2[2] HD9/EAUX2[1] HD8/DCI_FDS/EAUX2[0] VSS HIRQ/DCI_ERR#/EAUX4[7] HRST#/EAUX3[5] HRDQ#/EAUX4[0] HWRQ#/DCI_REQ#/EAUX4[1] HD15/EAUX2[7] HD14/EAUX2[6] VC25 HD7/DCI[7]/EAUX[7] HD1/DCI[1]/EAUX[1] HD0/DCI[0]/EAUX[0] VC25 VSS HSYNC#/CAMYUV7/EAUX3[0] PCLK2XSCN/CAMYUV4 YUV7/CAMYUV0 YUV6/VDAC PCLKQSCN/CAMYUV5/AUX3[2] VSYNC#/CAMYUV6/EAUX3[1] YUV5/YDAC VSS AVCC (VDAC) YUV4/RSET YUV3/COMP YUV2/CDAC YUV1/VREF YUV0CAMYUV2 CLK VC33
AUX7
AUX6
VC33
LD1
LD2
LA3
LD12
VC33
EAUX4[4]/HA2
VPP
VC33
LD3
LD5
LD9
LD13
LWRHL#
CAMYUV1
AUX1
IOR#/AUX3
LD4
LD6
LD10
LD14
VSS
LA0
IOW#/AUX2
AUX4
VC33
LD7
LD11
LD15
VC33
LA1
VSS
AUX5
VSS
LD8
VSS
LWRLL#
CAMYUV0
LA2
VSS
VC25
LCS0#
208-Pin PQFP Package
ES4428
VSS
104

ESS Technology,Inc.SAM0357-070600
ES4428/ES4427 DATA SHEET PRELIMINARY
ES4428 PIN DESCRIPTION
Name Number I/O Definition
VC33 1, 18, 27, 59, 68, 75, 92, 99,
104, 130, 148, 157, 159,
164, 183, 193, 201
P 3.3V digital power supply.
VC25 9, 35, 44, 83, 121, 139, 172 P 2.5V digital power supply.
LA[21:0] 23:19, 16:10, 7 :2, 207:204 I/O Flash and Read-Only memory device address bus.
VSS 8, 17, 26, 34, 43, 60, 67, 76,
84, 91, 98, 103, 120, 129,
138, 147, 156, 163, 171,
177, 184, 192, 200, 208
G Digital ground.
RESET# 24 I Reset input (active-low).
TDMDX
25
O TDM transmit data output.
RSEL I ROM Select
TDMDR 28 I TDM receive data input.
TDMCLK 29 I TDM clock input.
TDMFS 30 I TDM frame sync input.
TDMTSC# 31 O TDM output enable (active-low).
TWS 32 O Audio transmit frame sync output.
SEL_PLL1 I Select PLL1 input. See the table
TSD0
33
O Audio transmit serial data output 0.
SEL_PLL0 I Select PLL0.
TSD1 36 O Audio transmit serial data output 1.
SEL_PLL2 I Select PLL2 See the table for pin number 33.
TSD2 37 O Audio transmit serial data output 2.
TSD3 38 O Audio transmit serial data output 3.
MCLK 39 I/O Audio master clock for audio DAC.
TBCK 40 I/O Audio transmit bit clock.
SPDIF
41
I Sony/Philips Digital Interface audio input.
SEL_PLL3
RSD 45 I Audio receive serial data.
RWS 46 I Audio receive frame sync.
RBCK 47 I Audio receive bit clock.
APLLCAP 48 I Analog PLL capacitor.
XIN 49 I Crystal input.
XOUT 50 O Crystal output.
AVCC (PLL) 51 P Audio PLL analog power supply.
RSEL Selection
0 16-bit ROM
1 8-bit ROM
SEL_PLL2 SEL_PLL1 SEL_PLL0 Notes
000 VCOOFF
0 0 1 27.0 MHz
0 1 0 BYPASS
0 1 1 54.0 MHz
1 0 0 121.5 MHz
1 0 1 81.0 MHz
1 1 0 94.5 MHz
1 1 1 108.0 MHz
SEL_PLL3 Clock Source
0 Crystal oscillator
1 DCLK input for test mode