Rotel RDV-985 Service manual
Quality Uncompromised
®
Technical
DVD PLAYER
RDV-985
Manual
Table of Contents
Specification......................................1
Information........................................2~17
Block Diagrams.................................18~22
Schematic Diagram ..........................23~33
PCB Assembly..................................34~36
Parts List...........................................37~47
Specifications
General
Readable Discs: DVD VIDEO, Audio CD, VIDE CD, SUPER VIDEO CD
Video Fomat: PAL or NTSC selectable
Video Output
VIDEO OUT (pin jack): 1.0 Vp-p (75 ohms)
S-VIDEO OUT (S jack):
Y Output: 1.0 Vp-p (75 ohms)
C Output: 286 mVp-p (75 ohms)
Horizontal Resolution: 500 Lines
Signal to Noise Ratio: 65 dB
Audio Output
ANALOG OUT (pin jack): 2.0 Vrms (10 kohms)
DIGITAL OUT (optical): - 21 to -15 dBm (peak)
Audio Characteristics
Frequency Response:
CD: (sampling frequency 44.1 kHz): 2 Hz to 20 kHz
DVD (sampling frequency 48 kHz): 2 Hz to 22 kHz
DVD (sampling frequency 96 kHz): 2 Hz to 44 kHz
Dynamic Range:
16 bit: More than 100 dB
20 bit: More than 108 dB
24 bit: More than 108 dB
Wow and Flutter: Unmeasurable (less than
Total Harmonics Distortion: Less than 0.002%
Physical
Power Requirements:
USA Version: AC 120V, 60 Hz
European Version: AC 230V, 50 Hz
Power Consumption: 23 W (POWER ON), 2 W (STANBY mode)
Weight: 4.7 kg (10.4 lbs)
Dimensions (W x H x D): 445 x 112 x 338 mm
1/2 x 47/16 x 135/16 inch
17
±
0.002%)
THE ROTEL CO., LTD.
SHINSEN-BLD. 4F 10-10 SHINSEN-CHO, SHIBUYA-KU,
TOKYO 150-0045, JAPAN
Serial. NO.
Beginning
Y-356A-0109/W
Appearance
2
Main Adjustment
3
Adjustment and confirmation matter
(1) Auto adjustment method
If microprocessor (IC401, IC402, IC714, IC716) or servo board (LEA10047) is replaced, initialize
the D VD player in the following matter:
ref. separate sheet.
(2) Confirmation of DVD RF level
1.The oscilloscope is connected between "1"(RFOP) of
CN104 and "2"(GND).
2.Reproduction of the test disc ( VT-502)
made by JVC.
3.It is confirmed that RF LEVEL is 350mVp-p 150mVp-p.
4.When there is disorder in the waveform road cuts etc,
test disk is exchanged and measured.
+
-
(3) Confirmation of CD jitter level and RF level
1. The CD jitter meter is connected between "11"(GND)
of CN104 and "12"(FLTOUT).
The RF level is observed at the same time.
2.The first test disk(CTS-1000) made of JVC is reproduced.
3.It is confirmed that RF LEVEL is 360 100mVp-p.
5. When there is disorder in the waveform road cuts
etc, test disk is exchanged and measured.
+
-
GNDGNDFLTOUT
12 ~ 1
CN104
Servo control P.C.B
LEA20001
DVD SERVO CONTROL PWB
"1""2""11""12"
RFOP
FRONT SIDE
(4)Flap adjustment of the Pick-up guide shaft
4
Attention !!
RDV-985 is adjusted from issue machine because of the FL display on the way.
Please go in the adjustment method before changes according to the following procedures.
Measurement
CN104 pin"1"
GND:CN104 pin"2"
Measurement machine
Oscilloscope
General tool : Hex-head wrench(2mm)
Adjustment point
Refer to Fig.2
connections
Refer to Fig.1
Mode
Reproduction
part
Extension cord No.
QUQ110-3740AM
Disc
VT-502
Extension Cord
DVD Mechanism A'ssy
CN11 of
Stand
Connection PWB
CN101 of DVD Servo Control PWB
RDV-985
Stand
200mm
Fig.1
Confirmation after adjustment.
5
Confirm to reproduce video CD and CD after
the DVD test disc is adjusted and to find abnormality.
B
Fig.2
A
A
(5) About keeping the disc
As for the DVD test disc, plane accuracy is demanded.Please note the keeping place on the disc.
1. Please do not put the disc directly on the work desk etc. after uses .
2.T o keep the planarity of the disc, politely handle ,and please put in a special case and keep
the disc v ertically after uses .
Please k eep keeping the disc in a cool place where direct sunshine and the air-conditioning
wind do not dr ive.
3.When the disc cur ves,an accurate adjustment cannot be done.
Please e xchange for a new test disc and adjust optics.
4Other discs might not be ab le to be reproduced when adjusting on a curved disc.
Point of adjustment
* Please execute the static electricity protection measures before starting the
adjustment.
* When the following parts are exchanged,optical adjustment "Adjust the flap of the disc motor"
is necessary.
1.The disc motor w as exchanged.
2.The laser pic k up was exchanged.
3.The tr averse motor unit was exchanged.
Note
Additionally , please adjust the flap of the disc motor when the picture quality deterioration is
seen .The basic adjustment though, is unnecessar y for part exchange in the traverse.
An optical adjustment in the laser pick up cannot be done.
Please adjust the flap of the disc motor after e xchanging the laser pick up.
* When the traverse unit is exchanged, the adjustment is basically unnecessary.
Check points for each error
6
(1) Spindle start error
*Defective spindle motor
Are there 10ohms resistance between each pin of CN101 "29~31"?
(The power supply is turned off and measured.)
*Hall element: Is sine wave output between CN101 "23" and "24", between "25" and "26",
and between "27" and "28" during rotation?
In either case, replace the mechanical unit.
*Defective spindle driver (IC251)
Is a driving wave output from CN101 "29~31" ?
During
rotation
Is IC251 "9" at "H" level (START)?
Servo IC --- Is control signal sent to the motor driver ?
IC201 "95" : Duty is 50% during stop, but varies during rotation (greatly varies at start).
--- If not sent, pattern or servo IC (IC201) is defective.
R259 : approx 2.5V during stop, but varies during rotation (greatly varies at start).
--- of not sent, pattern or servo IC (IC201) is defective.
Is FG input to servo IC ?
Observe FG wave from IC201 "89". --- If not output, pattern, IC251 or IC201 is defective.
(2) Disc Detection, Distinction error (no disc, no REFNV)
* Laser is defective.
* Front End Processor is defective (IC101).
* APC circuit is defective. --- Q101.
* Pattern is defective. --- Lines for CN101 "15" and "17".
Lines for between IC201 "2" and IC101 "2"(LDONA),
between IC201 "3" and IC101 "1" (LDONB).
* Servo IC is defective (IC201).
* Is signal sent to IC201(servo)"71" AS2 ?
* IC101 --- For signal from IC101 to IC301, is signal output from IC101 "88" (RFAS1) and
IC101 "69" REENV ?
(3) Traverse movement NG
7
* For automatic adjustment, traverse movement occurs only when the position is changed to retry
judging the disc type after the 1st judgment resulted in an error. Therefore, traverse movement
rarely occurs because, in most cases, disc judgment at the current position (1st time judgment)
is executed successfully. (Of course, NG rarely occurs in this step.)
Note: 1st time judgment of disc type resulted in NG. --- The re-judgment of disc type may not be
successful. Therefore, after removing the cause of traverse movement, re-execute automatic
adjustment and confirm that no problem exists.
* Check point
a)During stop
Whether 50% duty pulse is output to R273
Whether between R274 and C271 is at approx. 2.5VDC
Offset voltage between CN101 "34" and "35" (scores mV if exists)
b)When tray is opened or closed
Check by oscilloscope whether a rectangular wave signal is output from CN101 "34" or "35".
50msec
2.5V
Approx.
500mV
GND
If checking a) or b) resulted in NG, IC201 maybe defective.
(4) Focus ON NG
* Is FE output ? --- Pattern, IC101
* Is FCDRV signal sent ? (R286) --- Pattern, IC301
* Is driving voltage sent ?
CN101 "20", "21" --- If NG, pattern, driver, mechanical unit (with the power turned off, measure the
resistance between CN101 "20" and "21").
* Does CN101 "7"(SRF1) become "H" and is the focus drawing in done?
--- Mechanical unit (laser power too low), IC101(defective gain)
--- Moreover, It is thought that abnormality is found in the disk.
* Mechanical unit is defective.
(5) Tracking ON NG
* When the tracking loop cannot be drawn in, IC201 "39" (/TRON) does not become "L".
* Mechanical unit is defective.
Because the under mentioned adjustment value is abnormal, it is not possible to draw in normally.
* Periphery of driver (IC271)
Constant or IC it self is def ective.
(When passing without becoming abnor mal while adjusting the following.)
* Servo IC (IC201)
When improper ly adjusted due to defective IC.
[F ocus position rough adjustment]
[Phase diff erence cancellation rough adjustment]
[T racking balance adjustment]
(6) Spindle CLV NG
8
* When the spindle cannot be shifted to CLV Servo, does not become "H" between IC301 "69"
and IC201"37".
* IC201 Is signal output from CN103 "1" (RFOP)?
* IC201 Is signal output from CN103 "11" (DSLIP)?
* IC201 Is signal output from CN103 "6" to "9" (binary-coded clock and data)?
* IC201 Is "39" (/TRON) at "L" level ?
* IC301 "74" to "76" --- Is signal output to IC201 "24", "25", "28" (In case of only CD).
(Serial communication of rotation information)
* Spindle motor driver is defective.
Even when one of the three phases is defective, item (1) may be passed.
--- Check the second item in (1) above.
* C260 to C263 Defective soldering
If noise eliminating capacitors are not properly soldered, noise may ride on the waveform.
* Besides, the undermentioned cause is thought though specific of the cause is difficult because various
factors are thought.
Mechanism is defective.(jitter)
IC101, IC201.
(7) Address read NG
* Besides, the undermentioned cause is thought though specific of the cause is difficult because various
factors are thought.
Mechanism is defective. (jitter)
IC201, IC301, IC401.
The disc is dirty or the wound has adhered.
(8) Between layers jump NG (double-layer disc only)
* When the focus flight is generated when jumps between layers.
Because all adjustments for L1 layer must be successful, this error may rarely be due to a
circuit defect.
* Crosstalk might occur from tracking to focus system. (See (11) ) --- Replace the mechanical unit.
* Driver surroundings.
* Defect of constant and IC.
* For double-layer discs, after checking CLV on layer L1, jumps to layer L0 after mode changes to FG.
Then tracking is turned off, and adjustments are executed from the focus position coarse adjustment
in order.
* When the jump between layers is done on the single-layer disk, the disk distinction error is thought.
--- The laser power is low (RF level is confirmed by CN102 "1" (RFOP)).
--- AS1, AS2, REFNV Is the signal sent to between IC101 and IC201 ?
(9) Neither picture nor sound is output
9
* Cannot search
a) Can the feed system be driven?
Chec k the waveform of TRSDRV signal (R273). --- Waveform between R274 and C271.
Search results in a change of duty
(three v alues with 2.5V at the center)
(The figure is e xaggerated.)
Chec k the waveform of CN101 "1" and "2". --- After the driver (IC271)
Approx.
2.5V
For short-distance search, the waveform
becomes roundish, not trapezoidal, and
voltage is low.
b) Is kick available?
Chec k the TRDRV signal waveform from R289.
Chec k the waveform of CN101 "22" and "23" --- After the driver (IC271)
Although diff ers in amplitude and DC offset, the waveform is similar to that of R289
Long-distance seek
Feed
Tracking
Kick pulse (fine seek) is
inserted after longdistance seek.
(Not one)
Kick pulse
Acceleration pulse at start;
deceleration pulse at stop
(each one)
(In the direction of search,
opposite to this figure)
Hold (DC) during feed
(10) Picture is distorted or abnormal sound occurs at intervals of several seconds.
10
Does JITOUT
change periodically?
(2V or more in peak
value, except
during kick)
YES
Feed system is defective (drive gain is defective: too large).
Check the waveform according to a) in (9).
Play back a simple disc with no angle change.
OK when the following waveform appears at intervals
of several seconds.
5~10Sec.
1~1.2V
Some system other
NO
than servo may be
defective.
If this voltage is too
high (2V or more, for
example), feed motor
may be defective, or
the mechanical unit
has seized.
(11) Others (unusual events experienced to date)
* Problem occurs with double-layer discs although no problem occurs with single-layer DVD.
(Error occurs, or search becomes unstable and takes longer.)
Crosstalk might occur from tracking to focus system.
--- When FE was observed during search (skip, etc.), it was found that a wave resembling TE
with an amplitude of 200mVp-p was riding on FE.
--- Mechanical unit was replaced.
* Error frequently occurred in the outer part of discs although no error occurred in the inner part.
--- Mechanical unit was replaced because tilt seemed to be defective.
(12) CD During normal playback operation
a) Is TOC reading normal?
NO
Please refer to "Servo Volume" flow.
Displays total time
for CD-DA.
Shifts to double-speed
mode for V-CD.
b)Playback possible?
YES
NO
*--:-- is displayed during FL serch.
According to [*Cannot serch ] for DVD(9), check the feed
and tracking systems.
*No sound is output although the time is displayed.(CA-DA)
*DAC, etc, other than servo.
*The passage of time is not stable, or picture is abnormal.(V-CD)
*The wound of the disc and dirt are confirmed.
(13) Others
V-CD : Frequent occurrence of error in inside and outer.
(Even the disk without the wound : when generated.)
Waveform observation
--- Is the oscillation frequency of about 700~900Hz output?
(Borrow a pertinent disk for the complaint for the combination with the disk.)
--- Exchanges mechanism for the mechanism resonance.
Precautions for Service
11
Handling of Traverse Unit and Laser Pickup
1. Do not touch any peripheral element of the pickup or the actuator.
2. The traverse unit and the pickup are precision devices and therefore must not be subjected to
strong shoc k.
3. Do not use a tester to examine the laser diode. (The diode can easily be destroyed by the
inter nal power supply of the tester.)
4. To replace the traverse unit, pull out the metal short pin for protection from charging.
5. When replacing the pickup, after mounting a new pickup, remove the solder on the short land
which is pro vided at the center of the flexible wire to open the circuit.
6. Half-fixed resistors for laser power adjustment are adjusted in pairs at shipment to match the
char acteristics of the optical block.
Do not change the setting of these half-fix ed resistors for laser power adjustment.
Destruction of Traverse Unit and Laser Pickup by Static Electricity
Laser diodes are easily destroyed by static electricity charged on clothing
or the human body . Before repairing peripheral elements of the traverse
unit or pic kup, be sure to take the following electrostatic protection:
1. Wear an antistatic wrist wrap.
2. With a conductive sheet or a steel plate on the workbench on which
the traverse unit or the pick up is to be repaired, ground the sheet
or the plate.
3. After removing the flexible wire from the connector (CN101),
short-circuit the flexible wire by the metal clip.
4. Short-circuit the laser diode by soldering the land which is provided
at the center of the flexible wire for the pickup.
After completing the repair , remove the solder
to open the circuit.
Short-circuit
Troubleshooting
1.Power-on processing
12
Connect to outlet.
A
to
Micro-
computer
Volume.
NO
POWER switch of
processing is OK.
to Power Supply
Does
the lamp
goes out when
remote control
box is turned
ON?
YES
Check S867
(power switch)
and the line
to IC714.
Power-on
Volume.
P.STAND-BY
indicating lamp
Press POWER switch.
NO
indicating lamp
YES
NO
voltage applied at each
lights up?
YES
STANDBY
goes out?
Does FL
light up?
NO
Correct
lead
of FL?
YES
NO YES
fuse is blown
IC953"1" at
approx.5.6V?
YES
B
F901
Voltage of
YES
Replace
F901.
NO
NO
wave detected on
the anode side of
Does the
oscillation wave
come out to
IC901"3"?
NO
Does the
DC voltage(input
AC 1.4V) come out to
D901 output side
NO
Replace
D901.
Return to A
and recheck.
Is the AC
D953?
NO
YES
YES
Return to A
and recheck.
YES
Connecting wires
to the soldered
part of the pins of
T902(transformer)
and anode of T902
is examined.
Replace
Return to A
and recheck.
Is energizing
of "cathode of D953"
and "pin1 of IC953"
YES
Replace
D953.
Return to A
and recheck.
IC901.
normal?
NO
Repair the
wiring.
Return to A
and recheck.
Return to A
and recheck.
to Power Supply
Return to B
and recheck.
Repair the wiring.
To Microcomputer
Volume.
Volume.
Check
IC831,R843
and C833.
between IC831"13"
and IC714"76" OK?
NO
NO
NO
Is connection
YES
Voltage
of CN831"19"
at +5V?
YES
Replace IC831.
Return to B
and recheck
Correct voltage
applied to IC831
(FL driver)?
YES
Oscillating
wave output from
IC831"20"?
YES
NONO
of IC831"14"-"16" and
IC714"2" to "4" OK?
To Microcomputer Volume.
of IC953"3"
computer
Voltage
of IC831"13"
(P.ON RESET)
at +5V?
YES
Is connection
YES
Voltage
at 5 V?
to
Micro-
Volume.
YES
NO
NO
OK between IC953"3"
Repair the
wiring.
Return to B
and recheck.
Is IC953
hot?
YES
Continuity
and IC714"16",
"62" and "99"?
OK
To Microcomputer
Volume.
NO
NG
Replace
IC953.
Return to A
and recheck.
Repair the
wiring.
Return to A
and recheck.
2. Power Supply Volume
13
With all the wiring removed, check unit power board.
(1) Remove all flat wires and wire assemblies which are connected to CN801, CN805, CN806.
(2) Short -circuit CN805"4" (POWER ON:B168) and "5" (B5V:B167). (Set each regulator to ON.)
(3)
The load resistance is connected between CN805"5"(B5V:B167) and "8,9"(D.GND:B164).
(4) Connect to the outlet and check the voltage at each part.
(For the voltage specification, see the wiring diagram.)
* If the load resistance is not connected, the voltage is not output to "B167".
Then restore the connection of CN801, CN805, CN806 and check voltage.
(1) Remove the wire short -circuiting CN805"4" and "5".
(2) Remove the load resistance.
(3) Restore the connection of CN801, CN805, CN806.
(4) Connect to the outlet.
(5) Turn the POWER switch on and check the voltage at each part.
If voltage abnormally drops when CN801, CN805, CN806 are connected (load is connected) though the voltage
was at the normal level when CN801, CN805, CN806 were disconnected(load is connected), or if the protective
element (fuse, etc.) is opened, the load which is supplied power may be defective or the wiring may be
short-circuited.
3. Open/Close Operation
Press OPEN/CLOSE key
Does the tray
smoothly open?
YES
Press in by hand
when fully opened.
Ejected
Does the tray
retreat?
YES
Voltage
between CN102"4"
and "5" at 0V when
tray ends
retreating?
OPEN/CLOSE
operation is OK.
NO
NO
Check S835 (OPEN/
CLOSE) and the
wiring to IC714.
YES
of
the remote control
box functions
normally?
CN102"1" at 0V when
tray opening operation
Check the connection between
CN102 and mechanical unit.
Check the mechanical unit.
CN102"3" at 0V when
Check the connection between
CN102 and mechanical unit.
Check the mechanical unit.
NO
Voltage of
ends?
NO
Voltage of
tray closing
ends?
NO
To Microcomputer
Volume.
NO
Voltage
of IC401"52"
at 0V?
YES
YES
IC401"52" at 0V when
tray opening operation
Check IC251 and
the periphery.
YES
Voltage of
Replace IC401.
IC401"51" at 0V when
tray closing
Replace IC401
voltage applied
between CN102"4"
and "5"?
ends?
YES
Voltage of
ends?
YESYES
Any
NO
NO
YES
Check the
connection
of CN102"1"
and
IC401"52"
NO
Check the
connection
between CN102
and mechanical
unit. Check the
mechanical unit.
Check the
connection of
CN102"3" and
IC401"51".
4. Microcomputer Volume
14
Processing of Each Microcomputer
* IC714 System microcomputer (sub-microcomputer)
After powering on, this microcomputer is continuously activated to control keys and remote control
signals.
According to key operations or remote control signals, it controls (turns on/off) the power for
LSIs including IC401 (main microcomputer) and the audio/video output circuit.
It also controls the resetting of the main microcomputer, FL driver IC (IC831) for FL display, and
various LED displays.
* IC401 Main microcomputer
This microcomputer controls a group of LSIs of servo and signal processing sections according to
commands from the system microcomputer.
After receiving time information from the signal processing section, it transmits the information
together with the status to the system microcomputer.
It controls the resetting of the LSIs of the servo and signal processing sections.
It has IC402 (16Mbit ROM) as an external ROM.
Normal Starting Conditions
* IC714 System microcomputer
(1) +5V must be applied to "16" and "62".
(2) Oscillators of "13" and "15" must be oscillating correctly.
(3) Input to "12" (RESET) must be at +5V (reset cancel).
If above (1) to (3) are not satisfied when the P.STANDBY indicating lamp does not light at
power-on, IC714 may be defective.
* IC401 Main microcomputer
(1) +5V must be applied to "17","22","34","54","66"
(2) Clock signal (13.5MHz) must be input to "23" from IC301 (ODC LSI).
(3) Input to "82" (RST) must be at +5V (reset cancel).
(4) Communication line with IC714 ("57","58,"67"~"69") and that with IC402 (external ROM)
("13"~"16","26"~"33","35"~"42","44","93"~"100") must work normally.
If above (1) to (3) are not satisfied when the P.STANDBY indicating lamp goes out but FL does not
light when the POWER switch is turned on, IC401, IC714 or IC402 may be defective.
5. Audio Volume
15
CN704 is
checked
IC850
Q851,Q852
is checked
YES
Is sound
output from
headphone?
YES
OK
The position of
the screw
fastening the
front panel is
confirmed.
This screw : because
there is working
of the ground.
Power
supplied correctly
to each IC?
YES
Is sound
signal output
from J702 (pin
jack)?
NO
Is sound
output from
headphone?
YES
Check Q711,
Q712 and J702
(soldered part).
NO
*
NO NONO
to Power Supply
Volume
IC702 are supplied
power from IC718.
Check I/O voltage of IC718.
Approx
. 5V
Voltage of
Q708 collector at
-12V?
YES
IC714 is
checked
Is
digital signal
output from
IC702"7"?
YES
Is
digital signal output
from IC701"20"?
YES
Is digital
signal output from
IC702"10", "13", "16"
and "19"?
YES
Check IC703, IC704
and their periphery.
NO
NO
NO
Check IC702
and PLL.
Replace
IC701.
Replace
IC702.
* PLL normal lock voltage
Between TP701 and TP702.
When fs=44.1kHz
When fs=48kHz
When fs=96kHz
0.6V
0.9V
2.6V
* Changing over the cutoff frequency of analog LPF
When fs=44.1kHz or 48kHz,
Microcomputer port FS2 is at the "L" level,
and Q703 and Q704 are turned ON.
When fs=96kHz,
Microcomputer port FS2 is at the "H" level,
and Q703 and Q704 are turned OFF.
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