Pioneer LD-700/KU User manual

(!,!) PIONEER
Service
cTWanual
CONTENTS
1. DISASSEMBLY 1-1
1.1 REMOVING THE EXTERNAL PARTS
AND CIRCUIT BOARDS 1-1
1.2 REMOVING THE PICKUP 1-1
2. MECHANISM ASSEMBLY AND
ADJUSTMENTS 2-1
2.1 PICKUP ASSEMBLY 2-7
2.2 PICKUP AND SLIDER ASSEMBLY 2-8
2.3 POSITIONING OF POTENTIOMETER
PINION GEAR 2-10
2.4 ADJUSTMENT OF CLAMP SWITCH . . .2-10
3. ELECTRICAL ADJUSTMENTS 3-1
4. SCHEMATIC DIAGRAM, PCB
PATTERN &PARTS LIST 4-1
4.1 OVERALL CONNECTION DIAGRAM. ... 4-1
4.2 LOCATION OF PCBs 4-3
4.3 FUSB, SFUB, RECB, DRVB, INTB,
CNNB &BLMB 4-5
4.4 PICKUP, PREB 4-9
4.5 LOLB, IRAB, DINB, KEYA, KEYB,
SRVB 1/3 (CONT) 4-13
4.6 SRVB 2/3 (FTS) 4-17
4.7 SRVB 3/3 (TBC) 4-21
4.8 DEMB 1/2 (VDEM) 4-25
4.9 DEMB 2/2 (ADEM) 4-29
4.10 REMOTE CONTROL UNIT (CU-700) ..4-33
4.11 PARTS LIST OF EACH PCBs 4-34
4.12 TR &ICs 4-39
4.13 WAVEFORMS 4-43
5. EXPLODED VIEW 5-1
5.1 EXTERNAL AND TOP VIEW 5-1
5.2 BOTTOM VIEW 5-4
5.3 MECHANISM 5-7
5.4 CU-700 5-10
5.5 PACKING MATERIAL 5-13
6. LABEL CHECK 6-1
7. SAFETY INFORMATION 7-1
8. SPECIFICATION 8-1
PIONEER ELECTRONIC CORPORATION *3-1,'Meguro 1-Chome, Meguro-ku, Tokyo 153. Japan
PIONEER ELECTRONICS (USA] INC. P.O. Box 1760. Long Beach. California SOBOI U.S.A.
TEL: [BOO] -421 -1 <304. [213] *320-531 *3
PIONEER ELECTRONIC (EUROPE] N.V. Keetberglaan 1. 27*30 Beveren, Belgium TEL: 03/775-2B0B
PIONEER ELECTRONICS AUSTRALIA PTY. LTD. 178-1B*3 Boundary Road. Braeside, Victoria 3135. Australia
TEL: [03] 5SO-3311

LD-7QO/KU
1. DISASSEMBLY
1.1 REMOVING THE EXTERNAL PARTS 1.2 REMOVING THE PICKUP
AND CIRCUIT BOARDS
Bottom cover
•Remove the 9screws (7)
•Remove the 2screws ©
|Bonnet
•Remove the 4screws (§)
•Remove the 6screws (4)
•Slide toward the back
to remove.
s
c
RVB, DEMB
rcuit boards
•Remove the 6screws (6)
|Slider |
•Remove the 2screws (8)
•Remove the 2 screws (§)
Pickup
Disc tray
•Turn the power on and depress
the REJECT button.
/•Or, after removing the SRVB \
and DEMB panel, adjust the \
position of the FL rack shown
in right figure. I
\•Release the latch. /
•Remove the 2screws (J)
|
Front panel
[
•Remove the 6screws (7)
Mechanism
chassis
•Remove the 3screws (f)
•Remove the Etype washer ®
•Remove the 4screws (l)
(2)
illustrated in (2).
1-1

<§ (2)
1-2
LO-700/KU

LD-7GO/KU
2. MECHANISM ASSEMBLY AND ADJUSTMENTS
2.1 PICKUP ASSEMBLY
Remove the backing and
attach the sheet.
2-1
2.2 PICKUP AND SLIDER ASSEMBLY
Assembly procedure:
1) Screw the tilt adjustment shaft into the pickup.
2) Place the pickup in the slider and attach the holder.
Note: Be careful not to apply pressure to the area
1around the objective lens or magnetic cir-
cuitry when doing this.
3) Attach the tilt adjustment shaft to the optical
body using the Etype washer.
4) Turn the slider upside down and attach limit gear.
Note: Be careful not to apply pressure to the area
around the objective lens or magnetic cir-
cuitry when doing this.
5) Rotate the worm gear until the pickup and
slider are parallel to each other (lines Aand B).
Aand B).
6) Attach the tilt motor and CTCB panel.
7) Properly route the wires around CTCB.
Attachment of limit gear B
Limit gear Bshaft
Attach limit gear C
with the U-shaped
section pointing
toward limit gear
Limit gear C
Attach so that there is no gap
between the pickup and
2-2
©

Tilt motor and CTCB panel attachment
2-3
©
LD-7QQ/KU
2.3 POSITIONING OF POTENTIOMETER PINION GEAR
•Adjust the projection of the pinion gear to •
the upper portion shown in the figure by idl-
ing the pinion gear when the pickup is
moved to the innermost position.
After positioning the pinion, turn the hexa-
gon socket setscrew clockwise until the end
of the screw lightly touches the potentiom-
eter holder. Then, turn back one full turn
and apply screw lock around the screw.
2.4 ADJUSTMENT OF CLAMP SWITCH
Adjustment should always
be done after replacing
the clamp switch.
1mm±0.5 mm
2-4
©

LD-700/KU
3. ELECTRICAL ADJUSTMENTS
Instruments and tools used:
•Color monitor TV
•Stereo system
•Dual trace oscilloscope (with time delay sweep,
DC-35MHz)
•Audio SG
•Frequency counter
•Shorting clips
•Test disc B1 (or FI
)
•CU-700
Precautions:
•Confirm that all power supply voltages are
correct.
©Confirm that there are no mechanical problems.
•Pinion adjustment of the slider potentiometer
must be completed.
•All parts of the pickup except the grating must
be correctly adjusted. Use FI test disc for the
grating adjustment.
•The oscilloscope range figures here assume the
use of a1:1 probe.
•Do not insert and remove discs when the player
is on its side up. (Do not press then /A button on
the player.)
Preparations:
•Connect amonitor TV and stereo amp to the
player.
•Remove the top and bottom panels.
•Insert atest disc.
•Perform PREB, SRVB and DEMB adjustments
with the player standing on its right side.
•Perform the PREB adjustment with the SRVB
and DEMB boards open (remove the SRVB and
DEMB board screws).
vr 1
VR 2
VR 3
VR4
VR 5
RF LEVEL
FOCS OFFSET
FOCS GAIN
TRKG BAL
TRKG GAIN
PREB adjustment points
TP 9
-11V
+1 ! V
GND
B1
B4
B2
B3
B1FB3
RF
FOCS A-
8
FOCS ERROR
TRKG GAIN MON.
TRKG OSC IN
+11 V
APC VCC
GNO
OSCILLOSCOPE TEST
POINT
ADJUST-
MENT
POINT
CHECK
POINT/
ADJUST-
MENT
STANDARD
ADJUSTMENT PROCEDURE
PREB ADJUSTMENT
On PREB
unless
otherwise
specified.
TP7
TP8
On PREB
unless
otherwise
specified.
0.25V -
0.5V
5mV/div
0.2V/div
O.lmS/div.
5mS/div
Positive
amplitude
=Negative
amplitude
Always perform the following adjustments after
replacing, repairing or adjusting the pickup or
replacing PREB.
CONFIRMATION OF THE LD POWER
•Measure the voltage between TP7 and TP8.
•Verify the voltage is in the range of 0.25V to 0.5V.
If not, replace the pickup.
FOCS OFFSET ADJUSTMENT
•Adjust the DC voltage of TP3 so that it is 0V±5mV
when the player is in the standby mode.
TRKG BALANCE ADJUSTMENT
•. Use search to locate frame #20,000.
•Open the TRKG loop. (Connect pins 20 and 22 of
SRVB Z401 PM4001 using the shorting clips.)
•Adjust so that the positive and negative sides of the
tracking error wave are equal.
3-2
©

LD-700/KU
NO.
OSCILLOSCOPE
VH
TEST
POINT
ADJUST-
MENT
POINT
CHECK
POINT/
ADJUST-
MENT
STANDARD
ADJUSTMENT PROCEDURE
TRKG LEVEL CHECK AND GRATING ADJUST-
MENT
X:
0.2V/div
Y:
0.2V/div
SRVB
TP-11
TP-12
Grating
Min. on X
axis
Max. on Y
axis
Max. on X
axis
MIN. on Y
axis
PRES
•Use testdisc Fj for grating adjustment.
•Use search to locate frame #15,000.
•Open the TRKG loop.
•Set the oscilloscope to the X-Y mode and observe
the tracking error (TP-1 1:X) and tracking A+B
(TP-12:Y) lissajous waveforms.
•Insert ascrewdriver in the PREB hole and slowly
rotate the grating until the amplitude of the lissajous
waveform is at its lowest point on the Xaxis and its
highest point on the Yaxis. The waveform should
also be smooth.
•Now rotate the screwdriver counterclockwise to
adjust the grating to the point where the amplitude
of the lissajous waveform is at its highest point on
the Xaxis and its lowest point on the Yaxis.
Note: If the lissajous waveform does not become
horizontal but remains slanted, the position
of the shaft holder may not be correct.
3-3
®

LD-7CJO/KU
NO.
OSCILLOSCOPE
VH
TEST
POINT
ADJUST-
MENT
POINT
CHECK
POINT/
ADJUST-
MENT
STANDARD
ADJUSTMENT PROCEDURE
RF LEVEL ADJUSTMENT
0.1 V/div ImS/div TP2 VR1 400mVp-p
•Close the TRKG loop.
•At about frame #18,000 adjust so that the TP2
output is 400mV p-p.
3-4

LD-700/KU
OSCILLOSCOPE
NO.
VH
TEST
POINT
ADJUST-
MENT
POINT
CHECK
POINT/
ADJUST-
MENT
STANDARD
ADJUSTMENT PROCEDURE
TRKG LOOP GAIN ADJUSTMENT
X:
0.5V/div
Y:
0.2V/div
X: TP6
Y: TP5 VR5
•Set the frequency of the FTG adjuster at 4kHz
(B1 disc) with Frequency-VR2. (3.7kHz: FI disc)
•Set the gain of the FTG adjuster at 4Vp-p with
Gain-VR2. Oscillator's output is available from
Yellow wire by turning the Switch to 2.
•Connect the Yellow wire of the FTG adjuster as
shown in the diagram.
•Connect red wire of the FTG adjuster as shown in
the diagram.
•Use search to locate frame #18,000.
»Adjust VR5 to turn J-LED on.
TRKG loop gain
(3.7kHz/4Vp-p: FI)
(4.0kHz/4Vp-p: B1)
REDWIRE YELLOWWIRE
3-5

LD-700/KU
OSCILLOSCOPE TEST
POINT
VH
X: X: TP4
0.2V/div Y: TP3
Y:
1V/div
ADJUST-
MENT
POINT
CHECK
POINT/
ADJUST-
MENT
STANDARD
ADJUSTMENT PROCEDURE
J-LED on
FOCS loop gain
BROWN WIRE
I
FOCS LOOP GAIN ADJUSTMENT
•Set frequency of the FTG adjuster at 1.8kHz (B1
disc) with Frequency-VRI. (2.1kHz: FI disc)
•Set the gain of the FTG adjuster at 1.2Vp-p with
Gain-VRI. Oscilator's output is available from
Orange wire by turning the Switch to 1.
•Connect the Orange wire of the FTG adjuster as
shown in the diagram.
•Connect the brown wire of the FTG adjuster as
shown in the diagram.
•Use search to locate frame #20,000.
•Adjust VR3 to turn on the green j(JUST) LED.
•Disconnect the FTG adjuster.
Oscilloscope
(2.1kHz/1.2Vp-p:
(1.8kHz/1.2Vp-p:
ORANGE WIRE
FI)
B1
)
3-6
®

STEP
NO.
OSCILLOSCOPE
RANGE TEST
POINT
ADJUST-
MENT
POINT
CHECK
ITEM/
ADJUST-
MENT
SPECIFI-
CATION
ADJUSTMENT PROCEDURE
VH
SRVB
TP1
PREB
TP5
Jig mirror
bias VR
Jig mirror
bias VR
Max.
TRKG
error
PICKUP OPTICAL AXIS CHECK
Always perform this procedure after replacing the
pickup and when it is suspected that the pickup is mal-
adjusted.
•Play adisc at about track number 15,000.
•Open the TRKG loop. (Connect SRVB, Z401,
PM4001 pins 20 and 22 with shorting clips.)
•Open the TANG loop. (Connect SRVB TP7 to
ground.)
CONFIRMATION OF OPTICAL AXIS IN
TRACKING DIRECTION
•Connect the bias voltage output terminal of the
optical axis checking jig (the current setting resistor
should be set to 200 ohms) to TP1 (TRKG RTN)
of SRVB.
•Measure the TRKG error level at TP5 of PREB.
Adjust the mirror bias VR of the jig so that the
error level is maximized and then record the peak-
to-peak value Eo and the voltage Vbm being
applied.
•Next, rotate the mirror bias VR all the way to the
+12V side and record the TRKG error p-p value Ep.
Then rotate the mirror bias VR all the way to the
—12V side and record the TRKG error p-p value En.
•If Vbm is within the range of ±2.4V:
EP>0.63Eo and En>0.63Eo
•If Vbm is outside the range of ±2.4V
:
Ep>0.70 Eo and En>0.70 Eo
•If the above conditions are not met, replace the
pickup.
TRKG +'2V
|J>—|MIRROR Q
i
—
b/T)(TANG) T
.R200P J
1VW 1OWVt*s
iTP 1J1
S(TP 3) Vb
—12V
3-7
LD-70Q/KU
STEP
NO.
OSCILLOSCOPE
RANGE
VH
TEST
POINT
ADJUST-
MENT
POINT
CHECK
ITEM/
ADJUST-
MENT
SPECIFI-
CATION
ADJUSTMENT PROCEDURE
CONFIRMATION OF OPTICAL AXIS IN TANG
DIRECTION
SRVB
TP3
PREB Jig mirror
TP5 bias VR Max.
TR KG
error
Jig mirror
bias VR
•Connect the bias voltage output terminal of the
optical axis checking jig to TP3 (TANG RTN) of
SRVB.
•Measure the TRKG error level at TP5 of PREB.
Adjust the mirror bias VR of the jig so that the
error level is maximized and then record the peak-
to-peak value Eo and the voltage Vbm being
applied.
•Rotate the mirror bias VRall the way to the +1 2V
side and record the TRKG error p-p value Ep.
Then rotate the mirror bias VR all the way to the
—12V side and record the TRKG error p-p value En.
•If Vbm is within the range of ±2.4 V:
Ep>0.63Eo and En>0.63Eo
•If Vbm is outside the range of ±2.4V:
EPX).70Eo and En>0.70Eo
•If the above conditions are not met.
replace the pickup.
3-8

LD-7DO/KU
SRVB, DEMB ADJUSTMENT POINTS
or -aQt oot ro
D
3
SRVB
T.VR203
TP1 TRKG RTN
TP2 FOCSDRV
TP3 TANG RTN
TP4 GND
TP5 SLDR SW
TP6 TRKG SW
TP7 TANG SW
TP8 HD1
TP9 REFH
TP10 FOCS A-B
TP1
1
TRKG ERROR
TP12 TRKG A+B
Q
c
3-9
NO.
OSCILLOSCOPE TEST
POINT
ADJUST-
MENT
POINT
CHECK
POINT/
ADJUST-
MENT
STANDARD
ADJUSTMENT PROCEDURE
On DEMB
unless
otherwise
specified.
On DEMB
unless
otherwise
specified.
DEMB
0.5V/div 1O/zs/div 2Vp-p
MAIN LINE VIDEO LEVEL 1ADJUSTMENT
•Use search to locate the composite test pattern of
chapter 15.
•Observe the video signal from the Q21 3emitter and
confirm that the level between the white peak and
synch tip is 2V. If the voltage is not correct, adjust
VR201.
0.5V/div 10/us/div Z201 (11) VR202 2Vp-p
1H DELAY VIDEO LEVEL ADJUSTMENT
•Play back the same test pattern in the still mode.
•Observe the video signal at pin 1 1 of PA301 8(Z201
)
and confirm that the level between the white peak
and synch tip is 2V. If the voltage is not correct,
adjust VR202.
3-10
©

LD-7QO/KU
IMO.
OSCILLOSCOPE
VH
TEST
POINT
ADJUST-
MENT
POINT
CHECK
POINT/
ADJUST-
MENT
STANDARD
ADJUSTMENT PROCEDURE
VIDEO LEVEL 2ADJUSTMENT
0.5V/div 10jus/div Q222
emitter
VR203 2Vp-p
•Observe the video signal from the Q222 emitter and
confirm that the level between the white peak and
synch tip is 2V. if the voltage is not correct, adjust
VR203.
0.5V/div
0.5V/div
10/is/di v0213(E)
0222(E)
Same
chroma
level
MIXING LEVEL ADJUSTMENT
•Use search to locate the magenta pattern of chapter
20.
•Adjust VR204 so that the Q213 emitter and Q222
chroma levels are the same.
1V/div 5/as/d ivZ203 (25) VR207 5/js
HD 1PULSE WIDTH ADJUSTMENT
•While playing adisc (with SPDL lock on), adjust so
that the HD1 signal pulse width at pin 25 of PA9001
is 5/as.
3-1 1
©

LD-700/KU
NO.
OSCILLOSCOPE
VH
TEST
POINT
ADJUST-
MENT
POINT
CHECK
POINT/
ADJUST-
MENT
STANDARD
ADJUSTMENT PROCEDURE
BURST GATE POSITION ADJUSTMENT
O.IV/div 1/is/div Z203 (10) VR205
•Use search to locate the composite test pattern of
chapter 15.
•Adjust so that the color burst signal is clearly gated
at pin 10 of PA9001.
1V/div ImS/div Z203{13) VR206
VI =V2
PLL LOOP OFFSET ADJUSTMENT
•Play the composite test pattern in the still mode.
Observe the DC level VI of pin 13 of PA9001
(Z203).
•Next, connect acapacitor of about 0.047/nF between
pin 9of the same 1C and ground and observe the DC
level V2 of pin 13.
VI should equal V2. If not, adjust VR206.
Screen VR208 Min. color
unevenness
PLL ERROR LEVEL ADJUSTMENT
•Use search to locate the magenta image of chapter
20 and adjust VR208 to the point where color
unevenness is minimized.
3-12

LD-7QO/KU
CHECK
OSCILLOSCOPE TEST ADJUST- POINT/
NO. MENT ADJUST- ADJUSTMENT PROCEDURE
POINT
VHPOINT MENT
STANDARD
AUDIO OUTPUT LEVEL ADJUSTMENT
•Play chapter 9, the 40% modulated 1kHz signal
(only in the left channel).
50mV/div Ims/div Z6(1 1) VR1 B1 •Measure the level of the 1kHz signal at pin 11 of Z6
65mVrms (HA1 2043) and adjust VR1 so the level is 65mV
FI rms (B1 ).
70mVrms •Play chapter 10, the 40% modulated 1kHz signal
(only in the right channel).
50mV/div Ims/div Z6(10) VR2 B1 •Measure the level of the 1kHz signal at pin 10of Z6
65mVrms (HA12043) and adjust VR2 so the level is 65mV
FI rms (B1).
72mVrms
OFFSET ADJUSTMENT
•Play the CX test signal in chapters 11 and 12.
0.5V/div O.lsec/div Z6(16) VR5 Min. 2/R •Observe both audio outputs.
lOmV/div Z6(14) waveform •When playing chapter 11,adjust VR5 so that the
level level of the waveform appearing in the right channel
each time the left channel output changes (at 8
second intervals) is as small as possible.
lOmV/div O.lsec/div Z6(16) VR6 Min. 1/L •When playing chapter 12, adjust VR6 so that the
0.5V/div Z6(14) waveform level of the waveform appearing in the left channel
level each time the right channel output changes (at 8
second intervals) is as small as possible.
3-13

LD-7QO/KU
NO.
OSCILLOSCOPE
VH
TEST
POINT
ADJUST-
MENT
POINT
CHECK
POINT/
ADJUST-
MENT
STANDARD
ADJUSTMENT PROCEDURE
1SRVB ADJUSTMENTS
On SRVB
unless
otherwise
specified.
On SRVB
unless
otherwise
specified.
REFI, HD 2ADJUSTMENTS
•Insert the disc and begin disc play.
•Verify the falling period of the trapezoid wave-
form is 10ms±1Ms. If not, adjust VR202 to satisty
5V/div 10Ms/div
the above.
•Verify the Lperiod of the PBH is 33/ns±2^s. If
not, adjust VR203 to satisfy the above.
5V/div Z202® VR202 10/is± 1ps
Z202 (D VR203 33/js±2^s
TRAPEZOID
Z202 ©
10/is±1jUs
PBH
Z202 ®—33/is±2/us
VC1 CLV search
—not more
than 1
2
seconds
Z4 CLOCK FREQUENCY CHECK
•Perform 0:10—>0:40 and 0:40->0: 10 search on the
CLV disc and confirm that in both cases search
takes no more than 12 seconds.
•If search takes too long or does not function
properly, adjust VC1.
3-1 A

NO.
OSCILLOSCOPE
VH
TEST
POINT
ADJUST-
MENT
POINT
CHECK
POINT/
ADJUST-
MENT
STANDARD
ADJUSTMENT PROCEDURE
On DRVB DRVB ADJUSTMENTS
unless
otherwise
specified.
VR1 Lead-ins
19-21
INSIDE LIMIT POSITION ADJUSTMENT
•Insert the test disc and begin disc play.
•Hold down X3 REV when the inside of the disc is
being played and confirm that it switches to the
inside limit at the lead-in sector 19-21 indication and
returns to the outside of the disc.
•If the player does not function properly, adjust VR1
and, after moving the pickup to within the program
territory, check the limit position again in the same
way. Repeat this process until the limit position is
correct.
VR2
VR3
12-INCH OUTSIDE LIMIT POSITION ADJUST-
MENT
Lead-outs
23-25
B1
#23,500
FI
#23,800
•Use search to locate frame #50,400, move the
pickup to the outside of the disc using X3 FWD
and confirm that it switches to the outside limit
and returns to the inside of the disc at the lead-out
sector 23-25 indication.
•If the player does not function properly, adjust VR2
and, after moving the pickup alittle bit toward the
inside of the disc, check the limit position again in
the same way. Repeat this process until the limit
position is correct.
8-INCH OUTSIDE ADJUSTMENT
•Connect a15kf2 resistor between TP2 and TP6.
•Adjust VR3 so that the player returns to frame
#23,500 (B! )when the pickup reaches the outside
limit on an 8-inch disc when moved toward the
outside of the disc using X3 FWD.
Note: The inside limit and 12-inch outside limit
are adjusted at the point where the
direction first changes, but for 8-inch disc
adjustments, the position where the limit
position is reached and the pickup returned
is adjusted.
DRVB ADJUSTMENT POINTS
TP6 INSIDE
TP5 OUTSIDE
TP4 VR1 center tap
TP3 VR2 center tap
TP2 Q22 base
TP1 SLDR pot
VR1: Inside limit
VR2: 12-inch outside limit
VR3: 8-inch outside
roi TP6
J;VR] VR2 VR3
^Jtpi ooo
<°
3-15
LD-7QO/KU
OSCILLOSCOPE TEST
POINT
ADJUST-
MENT
POINT
CHECK
POINT/
ADJUST-
MENT
STANDARD
ADJUSTMENT PROCEDURE
Minimum
crosstalk
If crosstalk is prominent with the CLV disc, perform
the following adjustment procedure.
PD BALANCE ADJUSTMENT
•Insert the test disc.
Use search to locate the vertical bar image (frame
#18,914) and play it in the still mode.
•Adjust VR1 so that the darkness of the vertical bars
that appear on the left and right sides of the screen
due to crosstalk is about the same and so that the
bars are as weak as possible.
®Replace the test disc with the CLV disc and confirm
that there is no crosstalk.
CTCB ADJUSTMENT POINTS
VR, O
PD BAL.
3-1 6

LD-700/KU 6
4. SCHEMATIC DIAGRAM, PCB PATTERN,
&
4.1 OVERALL CONNECTION DIAGRAM
3
PARTS LIST 45
A
B
C
D

4.2 LOCATION OF PCBs TRAY POWER
L-SET SW SW
>*
4-3
L0-700/KU
NOTES:
•Parts without part number cannot be supplied.
•The Amark found on some component parts indicates the importance of the safety
factor of the part. Therefore, when replacing, be sure to use parts of identical desig-
nation.
Part List
LD-700/KU Parts list 1
(MKHPart No.) (IT) (REF Nos. &DESCRIPTIONS)
VUR-052
VUR-032
VUR-051
VUR-050
VUG-113
VUS-038
VUY-054
VUV-053
VUS-037
VUG-116
VUG-088
VUG-115
FUSB
RECB
SFUS
DRVB
LOLB
INTB
CNNB
PREB
SRVB
KEYA
KEYB
IRAB
Abbreviation List of PCBs
FUSB
RECB
DRVB
LOLB
INTB
VUG-114
VUV-052 DINB
DEMB CNNB
VUS-039 CTCB PREB
VUY-059 Pickup SRVB
VUL-016 RF modulator CONT
VSA-007
(VSA-006) SU1 Power switch FTS
VDG-016
VCG-018 Power cord
Cl TBC
VTT-040 Power transformer
VEK-005 FU1 (
VEK-018
VXP-009 FU2- 5
Plunger KEYA
VXM-028 Loading motor KEYB
VXM-027 Sp indie motor IRAB
VXM-020 SI ider motor DINB
VXM-031
VCG-005 Tilt motor
C2 DEMB
VCS-005 Potentiometer VDEM
VSK-004 SU2- 4ADEM
VSF-009 SU5 SFUS
Fuse Board
Rectifier Board
Driver Board
Loading Logic Board
Interlock Board
Connector Board
Pre-processing Board
Servo Board
JSystem Control
JFocus, Tracking,
&SI ider servo
*Time Base Correction
>indle &Tangential servo)
Key Board A
Key Board B
Infrared Amplifier Board
DIN Connector Board
Demodulator Board
iVideo demodulator
:Audio demodulator
Sub Fuse Board
4-4

LD-700/KU 6
4.3 FUSB, SFUS, RECB, DRVB, INTB, CNNB &BLMB
B
D
1
B
D
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