Hitachi HTD-K185UK User manual

CAUTION:
Before servicing this chassis, it is important that the service technician read the “Safety
Precautions”and“ProductSafetyNotices”inthisservicemanual.
ATTENTION:
Avant d’effectuer l’entretien du châassis, le technicien doit lire les «Précautions de sécurité»
etles«Noticesdesécurité du produit» présentés dans le présent manuel.
VORSICHT:
Vor Öffnen des Gehäuses hat der Service-Ingenieur die „Sicherheitshinweise“ und „Hinweise
zurProduktsicherheit“indiesemWartungshandbuchzulesen.
SERVICE MANUAL
MANUEL D'ENTRETIEN
WARTUNGSHANDBUCH
Data contained within this Service
manual is subject to alteration for
improvement.
Les données fournies dans le présent
manuel d’entretien peuvent faire l’objet
de modifications en vue de perfectionner
leproduit.
Die in diesem Wartungshandbuch
enthaltenen Spezifikationen können sich
zwecksVerbesserungenändern.
SPECIFICATIONSAND PARTS ARE SUBJECTTO CHANGE FOR IMPROVEMENT
DVD AV Receiver and Digital Terrestrial TV Receiver
October 2004
SM0154
HTD-K185UK

A) HARDWARE
1. GENERAL DESCRIPTION
1.1 MT1379
The MT1379 Progressive Scan DVD-Player Combo Chip is a single-chip MPEG video
decoding chip that integrates audio/video stream data processing, TV encoder, four video
DACs with Macrovision, copy protection, DVD system navigation, system control and
housekeeping functions.
The features of this chip can be listed as follows;
General Features:
*Progressive scan DVD-player combo chip
*Integrated NTSC/PAL encoder,
*Built-in progressive video output
*DVD-Video, VCD 1.1, 2.0, and SVCD,
*Unified track buffer and A/V decoding buffer,
*Direct interface of 32-bit SDRAM,
*Servo controller and data channel processing.
Video Related Features:
*Macrovision 7.1 for NTSC/PAL interlaced video,
*Simultaneous composite video and S-video outputs, or composite and YUV outputs,
or composite and RGB outputs.
*8-bit CCIR 601 YUV 4:2:2 output.
* Decodes MPEG video and MPEG2 main profile at main level.
* Maximum input bit rate of 15Mbits/sec.
Audio Related Features:
*Dolby Digital (AC-3) and Dolby Pro Logic
*Dolby Digital S/PDIF digital audio output
*High-Definition Compatible Digital. (HDCD) decoding
*Dolby Digital Class A and HDCD certified
*SRS True Surround
*CD-DA
*MP3

1.2 Memory
SDRAM Memory Interface
The MT1379 provides a glueless 16-bit interface to DRAM memory devices used as
OSD, MPEG stream and video buffer memory for a DVD player. The maximum amount of
memory support is 16 MB of Synchronous DRAM (SDRAM). The memory interface is
configurable in depth to support 128-Mb addressing. The memory interface controls
access to both external SDRAM memories, which can be the sole unified external
read/write memory acting as program and data memory as well as various decoding and
display buffers.
1.3 Drive Interfaces
The MT1379 supports the DV34 interface, and other RF and servo interfaces used
by many types of DVD loaders. These interfaces meet the specifications of many DVD
loader manufacturers.
1.4Front Panel
The front panel is based around a Futaba VFD and a common NEC front panel
controller chip, (uPD16311). The MT1379 controls the uPD16311 using several control
signals, (clock, data, chip select). The infrared remote control signal is passed directly to
the MT1379 for decoding.
1.5 Rear Panel
A typical rear panel is included in the reference design. This rear panel supports:
•Six channel or two channel audio outputs,
•Optical and coax SPDIF outputs,
•Composite, S-Video, and SCART outputs.
The six-video signals used to provide CVBS, S-Video, and RGB are generated by the
MT1379's internal video DAC, The video signals are buffered by external circuitry.
Six channel audio output by the MT1379 in the form of three I2S (or similar) data
streams. The S/PDIF serial stream is also generated by the MT1379 output by the rear
panel. The six channel audio DACs (AK4356, PCM1606) are used for six channel audio
output with MT1379, and similarly AK4382A, CS4392 Audio DACs are used for two
channel audio output with MT1379.
12-pin DDX board output jack gives out the amplified audio. Digital Audio is processed
in the DDX-8228 IC and then amplified in the DDX-2050 Power Amplifier ICs.

2. SYSTEM BLOCK DIAGRAM AND MT1379 PIN DECRIPTION
2.1 MT1379 Pin Description
Pin Number Symbol Type Description
1 IREF Analog Input Current reference input. It generates reference current for data PLL. Connect
an external 100K resistor to this pin and PLLVSS.
2 PLLVSS Ground Ground pin for data PLL and related analog circuitry
3 LPIOP Analog Output Positive output of the low pass filter
4 LPION Analog Output Negative output of the low pass filter
5 LPFON Analog output Negative output of loop filter amplifier
6 LPFIP Analog Input Positive input of loop filter amplifier
7 LPFIN Analog Input Negative input of loop filter amplifier
8 LPFOP Analog Output Positive output of loop filter amplifier
9 JITFO Analog Output RF jitter meter output
10 JITFN Analog Input Negative input of the operation amplifier for RF jigger meter
11 PLLVDD3 Power 3.3V power pin for data PLL and related analog circuitry
12 FOO Analog Output Focus servo output. PDM output of focus servo compensator
13 TRO Analog Output Tracking servo output. PDM output of tracking servo compensator
14 TROPENPWM Analog Output Tray open output, controlled by microcontroller. This is PWM output
for TRWMEN27hRW2=1 or is digital output for TRWMEN27hRW2=0
15 PWMOUT1 Analog Output The 1st general PWM output
16 PWMOUT2 Analog Output The 2nd general PWM output
17 DVDD2 Power 2.5V power pin for internal fully digital circuitry
18 DMO Analog Output Disk motor control output. PWM output
19 FMO Analog Output Feed motor control. PWM output
20 DVSS Ground Ground pin for internal fully digital circuitry
21 FG Input ^1 Motor Hall sensor input
22 HIGHAO Inout 2-16 MA,
SR PU
Microcontroller address 8
23 HIGHA1 Inout 2-16
MA, SR PU
Microcontroller address 9
24 HIGHA2 Inout 2-1 6MA,
SR PU
Microcontroller address 10
25 HIGHA3 Inout 2-16MA,
SR PU
Microcontroller address 11
26 HIGHA4 Inout 2-16MA,
SR PU
Microcontroller address 12
27 HIGHA5 Inout 2-16MA,
SR PU
Microcontroller address 13
28 DVSS Ground Ground pin for internal digital circuitry
29 HIGHA6 Inout 2-16MA,
SR PU
Microcontroller address 14
30 HIGHA7 Inout 2-16MA,
SR PU
Microcontroller address 15

31 AD7 Inout 2-16MA,
SR
Microcontroller address/data 7
32 AD6 Inout 2-16MA,
SR
Microcontroller address/data 6
33 ADS Inout 2-16MA,
SR
Microcontroller address/data 5
34 AD4 Inout 2-16MA,
SR
Microcontroller address/data 4
35 DVDD3 Power 3.3V power pin for internal digital circuitry
36 ADS Inout 2-16MA,
SR
Microcontroller address/data 3
37 AD2 Inout 2-16MA,
SR
Microcontroller address/data 2
38 AD1 Inout 2-16MA,
SR
Microcontroller address/data 1
39 ADO Inout 2-16MA,
SR
Microcontroller address/data 0
40 IOAO Inout 2-16MA,
SR PU
Microcontroller address 0 / IO
41 IOA1 Inout 2-16MA,
SR PU
Microcontroller address 1 / IO
42 DVDD2 Power 2.5V power pin for internal digital circuitry
43 IOA2 Inout 2-16MA,
SR PU
Microcontroller address 2 / IO
44 Inout 2-16 MA,
SR PU
Microcontroller address 3 / IO
45 IOA4 Inout 2-16MA,
SR PU
Microcontroller address 4 / IO
46 IOA5 Inout 2-16MA,
SR PU
Microcontroller address 5 / IO
47 IOA6 Inout 2-16MA,
SR PU
Microcontroller address 6 / IO
48 IOA7 Inout 2-16MA,
SR PU
Microcontroller address 7 / IO
49 A16 Output
2-16MA, SR
Flash address 16
50 A17 Output
2-16MA, SR
Flash address 17
51 IOA18 Inout 2-16MA,
SR SMT
Flash address 18 /IO
52 IOA19 Inout 2-16MA,
SR SMT
Flash address 19 /IO
53 IOA20 Inout 2-16MA,
SR SMT
Flash address 20 / IO OR
Video in Data PortB 0
54 APLLVSS Ground Ground pin for audio clock circuitry

55 APLLVDD3 Power 3.3V Power pin for audio clock circuitry
56 ALE Inout 2-16MA,
SR PU, SMT
Microcontroller address latch enable
57 IOOE# Inout 2-16MA,
SR SMT
Flash output enable, active low / IO
58 IOWR# Inout 2-16MA,
SR SMT
Flash write enable, active low / IO
59 IOCS# Inout 2-16MA,
SR PU, SMT
Flash chip select, active low / IO
60 DVSS Ground Ground pin for internal digital circuitry
61 UP1_2 Inout 4MA,
SR PU,
SMT
Microcontroller port 1-2
62 UP1_3 Inout 4MA,
SR PU, SMT
Microcontroller port 1-3
63 UP1_4 Inout 4MA,
SR PU,
SMT
Microcontroller port 1-4
64 UP1_5 Inout 4MA,
SR PU,
SMT
Microcontroller port 1-5
65 UP1_6 Inout 4MA,
SR PU,
SMT
Microcontroller port 1-6
66 DVDD3 Power 3.3V power pin for internal digital circuitry
67 UP1_7 Inout 4MA,
SR PU,
SMT
Microcontroller port 1-7
68 UP3_0 Inout 4MA,
SR PU,
SMT
Microcontroller port 3-0
69 UP3_1 Inout 4MA,
SR PU,
SMT
Microcontroller port 3-1
70 INTO# Inout 2-16MA,
SR PU, SMT
Microcontroller interrupt 0, active low
71 IR Input SMT IR control signal input
72 DVDD2 Power 2.5V power pin for internal digital circuitry
73 UPS 4 Inout Microcontroller port 3-4
74 UPS 5 Inout Microcontroller port 3-5
75 UWR# Inout 2-16MA,
SR PU, SMT
Microcontroller write strobe, active low
76 URD# Inout 2-16MA,
SR PU, SMT
Microcontroller read strobe, active low
77 DVSS Ground Ground pin for internal digital circuitry
78 RD7 Inout DRAM data 7
79 RD6 Inout DRAM data 6
80 RD5 Inout DRAM data 5
81 RD4 Inout DRAM data 4
82 DVDD2 Power 2.5V power pin for internal digital circuitry

83 RD3 Inout DRAM data 3
84 RD2 Inout DRAM data 2
85 RD1 Inout DRAM data 1
86 RDO Inout DRAM data 0
87
RWE# Output
2-16MA, SR
DRAM Write enable, active low
88 CAS# Output
2-16MA, SR
DRAM column address strobe, active low
89 RAS# Output
2-16MA, SR
DRAM row address strobe, active low
90 RCS# Output
2-16MA, SR
DRAM chip select, active low
91 BAO Output
2-1 6MA, SR
DRAM bank address 0
92 DVSS Ground Ground pin for internal digital circuitry
93 RD15 Inout 2-16MA,
SR PU/PD,
SMT
DRAM data 15
94 RD14 Inout 2-16MA,
SR PU/PD,
SMT
DRAM data 14
95 RD13 Inout 2-16MA,
SR PU/PD,
SMT
DRAM data 13
96 RD12 Inout 2-16MA,
SR PU/PD,
SMT
DRAM data 12
97 DVDD3 Power 3.3V power pin for internal digital circuitry
98 RD11 Inout 2-16MA,
SR PU/PD,
SMT
DRAM data 11
99 RD10 Inout 2-16MA,
SR PU/PD,
SMT
DRAM data 10
100 RD9 Inout 2-16MA,
SR PU/PD,
SMT
DRAM data 9
101 RD8 Inout 2-16MA,
SR PU/PD,
SMT
DRAM data 8
102 DVSS Ground Ground pin for internal digital circuitry
103 CLK Output
2-1 6MA, SR
DRAM clock
104 CLE Output
2-16MA, SR
DRAM clock enable
105 RA11 Output
2-16MA, SR
DRAM address bit 1 1 or audio serial data 3 (channel 7/8)
106 RA9 Output
2-16MA, SR
DRAM address 9
107 RA8 Output
2-16MA, SR
DRAM address 8
108 DMVDD3 Power 3.3V Power pin for DRAM clock circuitry
109 DMVSS Ground Ground pin for DRAM clock circuitry
110 RA7 Output
2-16MA, SR
DRAM address 7
111 DVDD3 Power I % 3.3V power pin for internal digital circuitry

112 RA6 Output
2-16MA, SR
DRAM address 6
113 RA5 Output
2-16MA, SR
DRAM address 5
114 RA4 Output
2-16MA, SR
DRAM address 4
115 DVSS Ground Ground pin for internal digital circuitry
116 DQM1 Output
2-16MA, SR
Mask for DRAM input/output byte 1
117 DQMO Output
2-16MA, SR
Mask for DRAM input/output byte 0
118 BA1 Output
2-16MA, SR
DRAM bank address 0
119 RA10 Output
2-16MA, SR
DRAM address lO
120 DVDD2 Power 2.5V power pin for internal digital circuitry
121 RAO Output
2-16MA, SR
DRAM address 0
122 RA1 Output
2-16MA, SR
DRAM address 1
123 RA2 Output
2-16MA, SR
DRAM address 2
124 RA3 Output
2-16MA, SR
DRAM address 3
125 DVSS Ground Ground pin for internal digital circuitry
126 RD31
Inout 2-16MA,
SR PU/PD,
SMT
DRAM data 31
127 RD30
Inout 2-16MA,
SR PU/PD,
SMT
DRAM data 30
128 RD29
Inout 2-16MA,
SR PU/PD,
SMT
DRAM data 29
129 RD28
Inout 2-16MA,
SR PU/PD,
SMT
DRAM data 28
130 DVDD3 Power 3.3V power pin for internal digital circuitry
131 RD27
Inout 2-16MA,
SR PU/PD,
SMT
DRAM data 27
132 RD26
Inout 2-16MA,
SR PU/PD,
SMT
DRAM data 26
133 RD25
Inout 2-16MA,
SR PU/PD,
SMT
DRAM data 25
134 RD24
Inout 2-16MA,
SR PU/PD,
SMT
DRAM data 24
135 DVSS Ground Ground pin for internal digital circuitry
136 DQM3
Output
2-1 6MA, SR
Mask for DRAM input/output byte 3
137 DQM2
Output
2-1 6MA, SR
Mask for DRAM input/output byte 2

138 RD23
Inout 2-16MA,
SR PU/PD,
SMT
DRAM data 23 / Videoin
Data PortA 7
139 RD22
Inout 2-16MA,
SR PU/PD,
SMT
DRAM data 22 / Videoin
Data PortA 6
140 DVDD2 Power 2.5V power pin for internal digital circuitry
141 RD21
Inout 2-16MA,
SR PU/PD,
SMT
DRAM data 21 / Videoin
Data PortA 5
142 RD20
Inout 2-16MA,
SR PU/PD,
SMT
DRAM data 20 / Videoin
Data PortA 4
143 RD19
Inout 2-16MA,
SR PU/PD,
SMT
DRAM data 19 /
Videoin Data PortA 3
144 RD18
Inout 2-16MA,
SR PU/PD,
SMT
DRAM data 18 /
Videoin Data PortA 2
145 DVSS Ground Ground pin for internal digital circuitry
146 RD17
Inout 2-16MA,
SR PU/PD,
SMT
DRAM data 17 /
Videoin Data PortA 1
147 RD16
Inout 2-16MA,
SR PU/PD,
SMT
DRAM data 16 /
Videoin Data PortA 0
148 ABCK Output
4MA
Audio bit clock
149 ALRCK Inout 4MA,
PD, SMT
(1 ) Audio left/right channel clock
(2) Trap value in power-on reset :
1 : use external 373 0: use internal 373
150 DVDD3 Power 3.3V power pin for internal digital circuitry
151 ACLK Inout
4MA
Audio DAC master clock (384/256 audio sample frequency)
152 MC DATA Input Microphone serial input
153 SPDIF Output 2-16MA,
SR : ON/OFF
SPDIF output
154 ASDATAO Inout 4MA
PDSMT
(1 ) Audio serial data 0 (left/right channel)
(2) Trap value in power-on reset :
1 : manufactory test mode 0 : normal operation
155 ASDATA1
Inout 4MA
PD SMT
(1) Audio serial data 1 (surround left/surround right channel)
(2) Trap value in power-on reset :
1 : manufactory test mode 0 : normal operation
156 ASDATA2 Inout 4MA
PD SMT
(1 ) Audio serial data 2 (center/left channel)
(2) Trap value in power-on reset :
1 : manufactory test mode 0 : normal operation
157 ASDATA3 Inout 4MA
PD SMT
(1 ) Audio serial data 3 (surround left/surround right channel)
(2) Trap value in power-on reset :
1 : manufactory test mode 0 : normal operation OR Videoin Data PortB 1
158 ASDATA4 Inout 4MA
PD SMT
(1 ) Audio serial data 4 (center/left channel)
(2) Trap value in power-on reset :
1 : manufactory test mode 0 : normal operation OR Videoin Data PortB 2
159 DACVDDC Power 3.3V power pin for VIDEO DAC circuitry
160 VREF Analog input Bandgap reference voltage
161 FS Analog output Full scale adjustment

162 YUVO/CIN Output
4MA, SR
Video data output bit 0 /
Compensation capacitor
163 DACVSSC Ground Ground pin for VIDEO DAC circuitry
164 YUV1/C Output
4MA, SR
Video data output bit 1 /
Analog chroma output
165 DACVDDB Power 3.3V power pin for VIDEO DAC circuitry
166 YUV2/Y Output
4MA, SR
Video data output bit 2 /
Analog Y output
167 DACVSSB Ground Ground pin for VIDEO DAC circuitry
168 YUV3/CVBS Output
4MA, SR
Video data output bit 3 /
Analog composite output
169 DACVDDA Power 3.3V power pin for VIDEO DAC circuitry
170 YUV4/G Output
4MA, SR
Video data output bit 4 /
Green or Y
171 DACVSSA Ground Ground pin for VIDEO DAC circuitry
172 YUV5/B Output
4MA, SR
Video data output bit 5 /
Blue or CB
173 YUV6/R Output
4MA, SR
Video data output bit 6 / Red
or CR
174 ICE Input PD,
SMT
Microcontroller ICE mode enable
175 BLANK# Inout 4MA,
SR SMT
Video blank area, active low /
Videoin Field_601
176 VSYN Inout 4MA,
SR SMT
Vertical sync / Videoin
Vsync_601
177 YUV7
Inout 4MA,
SR SMT
Video data output bit 7 / Videoin Data
PortB 3
178 DVSS Ground Ground pin for internal digital circuitry
179 HSYN
Inout I4MA,
SR SMT
Horizontal sync /
Videoin Hsync_601
180 SPMCLK Input Audio DAC master clock of SPDIF input /
Videoin Data PortB 4
181 SPDATA Input Audio data of SPDIF input /
Videoin Data PortB 5
182 DVDD2 Power 2.5V power pin for internal digital circuitry
183 SPLRCK Input Audio left/right channel clock of SPDIF input /
Videoin Data PortB 6
184 SPBCK Input Audio bit clock of SPDIF input /
Videoin Data PortB 7
185 DVDD3 Power 3.3V power pin for internal digital circuitry
186 XTALO Output Crystal output
187 XTALI Input Crystal input
188 PRST Input PD,
SMT
Power on reset input, active high
189 DVSS Ground Ground pin for internal digital circuitry
190 VFO13 Output The 1st, 3rd header VFO pulse output
191 IDGATE Output Header detect signal output
192 DVDD3 Power 3.3V power pin for internal digital circuitry
193 UDGATE Output DVD_RAM recording data gate signal output
194 WOBSI Input Wobble signal input
195 SDATA Output RF serial data output
196 SDEN Output RF serial data latch enable
197 SLCK Output RF serial clock output
198 EDO Input Flag of defect data input status
199 ADCVSS Ground Ground pin for ADC circuitry