Roadstar DVR-9100 User manual

Service Manual - DVR-9100
R
DVR-9100
Service Manual - DVR-9100

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caution
Many electrical and mechanical parts in this chassis have special safety characteristics. These safety
characteristics often pass unnoticed and the protection afforded by them can not necessarily be obtained b
y
using replacement components rated for higher voltage, wattage, etc. Replacement parts that have these
special safety characteristics are identified in this manual and its supplements; electrical components
having such features are identified by in the schematic diagram and the parts list.
Before replacing any of these components, read the parts list in this manual carefully. The use of substitute
replacement parts that do not have the same safety characteristics asspecified in the parts list may create
shock fire or other hazards

1
CONTENTS
SPECIFICATIONS ........................................................................................
ADVANTAGES OF THISRODUCT....................................................................
TROUBLE SHOOTING ...................................................................................
WAVEFORMS ...............................................................................................
VOLTAGE CHARTS........................................................................................
CIRCUIT DIAGRAM.......................................................................................
BLOCK DIAGRAM..........................................................................................
PCB CIRCUIT BOARD....................................................................................
INSTRUMENT DISASSEMBLY........................................................................
02
03
04
25
28
32
46
47
72

2
SPECIFICATIONS
Power Supply AC 110V~230V / 50~60Hz
Power Consumption 15~40W
TV Signal System Standard PAL System
Laser Semiconductor Laser,650nm
Operating Temperature 41~95
Operating Humidity 5%~85%
OperatingAltitude -305~3048m
Video Output Level 1V±0.2Vpp
DVD Record Media DVD+RW,DVD-R
DVD Playback DVD+RW , DVD+R , DVD-R Video Mode ,
DVD-RW Video , CD , CD-R , CD-RW , VCD ,
CD-DA(CD-Digital Audio) , SVCD(Super Video CD)
Signal Source TV / CVBS / S-Video
Chapter Creation Manually /Automatically
Audio Format 2 ch
Aspect Ratio 4:3 / 16:9 / Full Screen
Luminance Nonlinearity Distortion ≤5%
Luminance Wave Distortion (Pulse,Bar) ≤10%
Luminance S/N Ratio ≥60
Chrominance S/N Ratio AM ≥60 , PM ≥55
Chrom Lum Time Delay (Pulse,Bar) ≤60ns
DGDP ≤5%
Video Recording Grade 1.691 / 2.537 / 3.382 / 5.073 / 9.716 Mbs

3
ADVANTAGESOFTHISPRODUCT
Playable Disc Formats
 DVD-Video
(single-sided/single-layer,single-sided/double-layer,double-sided/single-layer,double-sided/double-layer)
 DVD+RW , DVD+R , DVD-RW , DVD-R
 Video-CD (1.0,1.1&2.0) SVCD , CD-DA , Mixed CD-DA (which is mixed data and audio)
 DTS encoded Audio CD
 MP3 Audio CD (generated by CD-R or CD-RW)
 WMAAudio CD (generated by CD-R or CD-RW)
 JPEG file disc
 Kodak Picture disc
 DVCD disc
Feature
 Support upgrading mpeg f/w via CD-R/CD-RW
Recordable Disc
 DVD+RW , DVD+R
Playback Functions
 Normal Playback
 Pause/Step Forward(VCD,SVCD,DVD)
 Slow Forward/Reverse(VCD,SVCD,DVD)
Recording Function
 Real-time recording of live TV input
 Recording TV input at a given time and date
 Recording audio/video material from camcorder, analog VCR or other A/V source
 Simple video editing
 Create home-based DVD discs that can be played on existing DVD players
Search Functions
 Scan Forward/Reverse
 Skip Forward/Reverse
Navigation Functions
 Title Menu
 DVD Menu
 Changeable multilingual audio track
 Changeable multilingual subtitle and subtitle toggle
 Changeable multi-story, multi-angle, parental control
Program Playback Functions
 VCD 1.0, 1.1 &2.0 without PBC, SVCD & CD-DA
 Maximum of 99 programmable tracks

4
TROUBLESHOOTING
1. POWER TEST
A. Power Board Test
N
o Power
Measure if 5V is
correct ? Change Power Board
Measure if 3.3V
is correct ? Change Power Board
Measure if AC3.9
is correct ? Change Power Board
Measure if -27V
is correct ? Change Power Board
Measure if 12V
is correct ? Change Power Board
OK
N
o
Yes
Yes
Yes
Yes
Yes
N
o
N
o
N
o
N
o

5
TROUBLESHOOTING
B. Power LED or VFD panel error
Front board LED
b
roken or contrary
polar ?
No LED display
Change LED
Change
VFD panel
VFD panel broken
or pin shot ?
12 pins cable between
front board and main
board is connected well.
F/B IC U1
#27 is –27v? #17,38 is 5v?
#40 is low voltage?
Are there signals
outputting form IC U1
#15~26,28,29
on F/B?
Are there singles
outputting form IC U34
#195~197
on M/B?
OK
Are there signals
inputting to IC U1
#5,6,8,9
on F/B?
Change F/B IC U1
Change M/B IC U25
else change M/B
Yes
N
o
N
o
Yes
N
o
Yes
N
o
Yes
N
o
Yes
N
o
Yes

6
TROUBLESHOOTING
2. PLAYBACK TEST
A. Loading Time Too Long
Loading error
40 pins
cable between M/B
and DVD loader is
connected well?
Change M/B
IC U25
Check resisters had contact
that near M/B IC
U8,U9,U25,U34.
If loading error.
Change M/B IC U25
or
Change M/B
OK
OK
N
o
Yes
Yes

7
TROUBLESHOOTING
B. Remote Control Not Working Properly
C. System hangs when power on or during playback
Remote Control
erro
r
Check batteries of remote
control are good.
If M/B IC U34
#4 is 5V Change M/B IC U34
If
F/B IR receiver
U3 #1 is 5V & #3 is
outputting
signal
Change F/B U3
else chan
g
e F/B
OK
System unstable
Check all cables are
in correct position.
Change M/B IC U25
else chan
g
e M/B
OK
N
o
Yes
N
o
Yes

8
TROUBLESHOOTING
D. Power on noise or noisy loader
E. Reading DVD test discs N.G. or loader doesn’t function, scratches disc or bad
readability.
System noise
Check noise source
If noise is from
loade
r
Change loader
Change M/B OK
The loader
can’t wor
k
Check all cables are
in correct position.
If
M/B IC U25’s
firmware is the newest
version
Update M/B’s
firmware
else change M/B
Check resisters had contact
that near M/B IC
U8,U9,U25,U34 & J29.
If
Loader’s
firmware is the newest
version
Update loader’s
firmware
else change loader
OK
N
o
Yes
N
o
Yes
N
o
Yes

9
TROUBLESHOOTING
3. VIDEO TEST
A. No signal input
N
o signal input
Check all cables are
in correct position.
Check M/B J3
& J29 for proper
soldering.
Check M/B IC U34
#151,154,157,160~162,205,208,211
whose 2 parts RLC for proper soldering
nd
If M/B IC U19
#5 is 27MHz Change U19
Check connectors J4,J7 & J37 on the I/O
board or any resistors, capacitors, & filter
beat near these connectors for short
circuits and bad solderin
g
. OK
N
o
Yes

10
TROUBLESHOOTING
B. AV input signal-no video output images or abnormal video output
AV input signal
erro
r
Check all cables are
in correct position.
Check
J45 or U2
on the main board or any
resistors for
short circuit
Inspect the whole process
again according to procedure
B on Item 3
If the above actions
don’t wor
k
Check pin 76 & pin 78~80
on U101 for short circuits.
OK
N
o
Yes
N
o
Yes

11
TROUBLESHOOTING
C. TV tuner input-no video output images or abnormal video output
TV input signal
erro
r
Use TV cable or
signal generator to
input TV signals.
Measure
the voltage on pin5
and pin6 on U103 with a
multimeter if it’s 5v or
32v
There’s a 5v
but no a 32v
Check the resistors,
capacitors and inductors
near U103 for short circuits
or bad sol
d
erin
g
.
Check positions U3, U2 or U7
on the main board or any
resistors near the IC for short
circuit or bad soldering
Inspect the whole process
again according to
procedure B on item 3. OK
N
o
Yes

12
TROUBLESHOOTING
D. S-video input-no video output or abnormal video output or black and white video
E. Abnormal VCD/DVD/NF-200 image or abnormal display of subtitle or abnormal menu
selections display.
S-video signal
erro
r
Check the S-video input/output cable to
see if it’s in the right position and secured
to the socket. Black and white images may
b
e caused be caused to the socket.
Check positions J37 & U2 on
the main board or any
resistors near the IC for short
circuit or bad soldering
Inspect the whole process
again according to
procedure B on item 3.
OK
Display error
Check
positions U8, U9 &U34
or any resistors & capacitors near
the IC for short circuit or
bad soldering.
Check positions J3 &
J29 for bad soldering
and short circuits.
OK
Repair
N
o
Yes

13
TROUBLESHOOTING
4. AUDIO TEST
A. Left and Right channel not functioning normally
Left & Right channel
error
Check positions J3, U12~U15 on the main
board or any resistors and capacitors near
the IC for short circuits and bad soldering.
If the main
board & I/O board
are properly connected
to
g
ethe
r
Check
positions J1 & J36 on
the I/O board or any resistors
or capacitors nearby for short
circuit or bad
soldering.
OK
Change main board
Change I/O board
N
o
Yes
N
o
Yes

14
TROUBLESHOOTING
B. The sound of AC-3 or SPDIF not functionally normally
Sound ofAC-3
or SPDIF error
Check positions J3, U12~U15 on the main
board or any resistors and capacitors near
the IC for short circuits and bad soldering.
Check
positions J1 & J36 on
the I/O board or any resistors
or capacitors nearby for short
circuit or bad
soldering.
Check
If settings of an
Amplifier are correct? Check line
between amplifier and the
unit are connected
properly.
OK
Change I/O board
Replace the connection
or setup the amplifier
correctly.
N
o
Yes
N
o
Yes

15
TROUBLESHOOTING
C. No sound in R/L audio inputs or abnormal sound.
R/L audio error
Check the flat cable
connected to the main
board to see if it’s secured
to the right socket.
Check
positions J3,J45,
U12~U15,U20,U21,U24
on the main board or any resistors
or capacitors nearby for short
circuit or bad
soldering.
Check if the main board and I/O board are
p
roperly connected together (check if the
pin assignments are correctly connected.)
Check
positions J1 & J36 on
the I/O board or any resistors
or capacitors nearby for short
circuit or bad soldering
or damage.
OK
Change I/O board
Change main board
N
o
Yes
N
o
Yes

16
TROUBLESHOOTING
D. The sound of TV-tuner audio L/R channel not functionally normally
R/L audio error
Check the flat cable
connected to the main
board to see if it’s secured
to the right socket.
Use TV cable or signal
generator to input TV
signal.
Measure
the voltage on pin5
and pin6 on U103 with a
multimeter if it’s 5v or
32v
Check the resistors,
capacitors and inductors
near U103 for short circuits
or bad solderin
g
.
Check positions U3 and JP1
on the main board or any
resistors near the IC for short
circuit or bad soldering.
Use the oscilloscope to measure the voltage
output on pin6 &pin7 on JP1. The range o
f
the voltage is between 2~2.3V.(This is the
standard value; need to compare the value
with the customer’s request. So far, there’s
another value about 1V.
Check
positions J3,J45,
U12~U15,U20,U21,U24
the main board or any resistors
or capacitors nearby for short
circuit or bad
soldering.
Change U103
Change the TV-tuner board on JP1
N
o
Yes
Yes

17
TROUBLESHOOTING
Check if the main board and I/O board are
properly connected together (check if the
pin assignments are correctly connected.)
Check
positions J1 & J36 on
the I/O board or any resistors
or capacitors nearby for short
circuit or bad
soldering.
Repair
Change I/O board
OK
N
o
Yes

18
TROUBLESHOOTING
E. TCD-731 or SBC444A or CBS or MP3 not sounding normally
Audio error
Check the flat cable
connected to the main
board to see if it’s secured
to the right socket.
Check
if the frequency
of pin5 on U19 located
on the main board
27 MHz
Change U19
Check
if the frequency
of pin64 on U34 located
on the main board
120MHz
Change U34
Check
if the frequency
of pinA19 & pinc17 on
U90 located on the
main board
108MHz
Change U90
Check
positions J12, J13, U34
and any resistors
or capacitors near the IC
for bad
soldering.
Repair
Check
positions J1 & J36 on
the I/O board or any resistors
or capacitors nearby for short
circuit or bad soldering
or damage.
OK
Repair
Change main board
Change I/O board
N
o
Yes
N
o
Yes
N
o
Yes
N
o
Yes
N
o
Yes