LG RC-185 User manual

SERVICE MANUAL
LG RC-185
MODEL

1-1
SECTION 1
SUMMARY
CONTENTS
PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS ............. 1-2
SERVICING PRECAUTIONS .................................................................................................. 1-3
THE STEPS FOR CHANGE THE OPTION CODE ........................................................... 1-4
UP-DATING PROGRAM ........................................................................................................... 1-5
SPECIFICATIONS ...................................................................................................................... 1-7

1-2
IMPORTANT SAFETY NOTICE
This manual was prepared for use only by properly trained audio-video service
technicians.
When servicing this product, under no circumstances should the original
design be modified or altered without permission from LG Electronics
Corporation. All components should be replaced only with types identical to
those in the original circuit and their physical location, wiring and lead dress
must conform to original layout upon completion of repairs.
Special components are also used to prevent x-radiation, shock and fire haz-
ard. These components are indicated by the letter “x” included in their compo-
nent designators and are required to maintain safe performance. No deviations
are allowed without prior approval by LG Electronics Corporation.
Circuit diagrams may occasionally differ from the actual circuit used. This way,
implementation of the latest safety and performance improvement changes
into the set is not delayed until the new service literature is printed.
CAUTION: Do not attempt to modify this product in any way. Never perform
customized installations without manufacturer’s approval. Unauthorized modi-
fications will not only void the warranty, but may lead to property damage or
user injury.
Service work should be performed only after you are thoroughly familiar with
these safety checks and servicing guidelines.
GRAPHIC SYMBOLS
The exclamation point within an equilateral triangle is intended to
alert the service personnel to important safety information in the
service literature.
The lightning flash with arrowhead symbol within an equilateral tri-
angle is intended to alert the service personnel to the presence of
noninsulated “dangerous voltage”that may be of sufficient magni-
tude to constitute a risk of electric shock.
The pictorial representation of a fuse and its rating within an equi-
lateral triangle is intended to convey to the service personnel the
following fuse replacement caution notice:
CAUTION: FOR CONTINUED PROTECTION AGAINST RISK
OF FIRE, REPLACE ALL FUSES WITH THE SAME TYPE AND
RATING AS MARKED NEAR EACH FUSE.
SERVICE INFORMATION
While servicing, use an isolation transformer for protection fromAC line shock.
After the original service problem has been corrected, make a check of the fol-
lowing:
FIRE AND SHOCK HAZARD
1. Be sure that all components are positioned to avoid a possibility of adjacent
component shorts. This is especially important on items trans-ported to and
from the repair shop.
2. Verify that all protective devices such as insulators, barriers, covers, shields,
strain reliefs, power supply cords, and other hardware have been reinstalled
per the original design. Be sure that the safety purpose of the polarized line
plug has not been defeated.
3. Soldering must be inspected to discover possible cold solder joints, solder
splashes, or sharp solder points. Be certain to remove all loose foreign par-
ticles.
4. Check for physical evidence of damage or deterioration to parts and compo-
nents, for frayed leads or damaged insulation (including the AC cord), and
replace if necessary.
5. No lead or component should touch a high current device or a resistor rated
at 1 watt or more. Lead tension around protruding metal surfaces must be
avoided.
6. After reassembly of the set, always perform an AC leakage test on all
exposed metallic parts of the cabinet (the channel selector knobs, antenna
terminals, handle and screws) to be sure that set is safe to operate without
danger of electrical shock. DO NOT USE A LINE ISOLATION TRANS-
FORMER DURING THIS TEST. Use anAC voltmeter having 5000 ohms per
volt or more sensitivity in the following manner: Connect a 1500 ohm, 10
watt resistor, paralleled by a .15 mfd 150V AC type capacitor between a
known good earth ground water pipe, conduit, etc.) and the exposed metal-
lic parts, one at a time. Measure the AC voltage across the combination of
1500 ohm resistor and .15 mfd capacitor. Reverse the AC plug by using a
non-polarized adaptor and repeat AC voltage measurements for each
exposed metallic part. Voltage measured must not exceed 0.75 volts RMS.
This corresponds to 0.5 milliamp AC. Any value exceeding this limit consti-
tutes a potential shock hazard and must be corrected immediately.
TIPS ON PROPER INSTALLATION
1. Never install any receiver in a closed-in recess, cubbyhole, or closely fitting
shelf space over, or close to, a heat duct, or in the path of heated air flow.
2. Avoid conditions of high humidity such as: outdoor patio installations where
dew is a factor, near steam radiators where steam leakage is a factor, etc.
3. Avoid placement where draperies may obstruct venting. The customer
should also avoid the use of decorative scarves or other coverings that
might obstruct ventilation.
4. Wall- and shelf-mounted installations using a commercial mounting kit must
follow the factory-approved mounting instructions. A product mounted to a
shelf or platform must retain its original feet (or the equivalent thickness in
spacers) to provide adequate air flow across the bottom. Bolts or screws
used for fasteners must not touch any parts or wiring. Perform leakage tests
on customized installations.
5. Caution customers against mounting a product on a sloping shelf or in a tilt-
ed position, unless the receiver is properly secured.
6. A product on a roll-about cart should be stable in its mounting to the cart.
Caution the customer on the hazards of trying to roll a cart with small cast-
ers across thresholds or deep pile carpets.
7. Caution customers against using extension cords. Explain that a forest of
extensions, sprouting from a single outlet, can lead to disastrous conse-
quences to home and family.
A.C. Voltmeter
1500 OHM
10 WATT
Place this probe
on each exposed
metal part.
Good Earth Ground
such as the Water
Pipe, Conduit, etc.
0.15uF
PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS

1-3
SERVICING PRECAUTIONS
CAUTION: Before servicing the VCR + DVD RECODER cov-
ered by this service data and its supplements and addends,
read and follow the SAFETY PRECAUTIONS. NOTE: if
unforeseen circumstances create conflict between the fol-
lowing servicing precautions and any of the safety precau-
tions in this publications, always follow the safety precau-
tions.
Remember Safety First:
General Servicing Precautions
1. Always unplug the VCR + DVD RECODERAC power cord
from the AC power source before:
(1) Removing or reinstalling any component, circuit board,
module, or any other assembly.
(2) Disconnecting or reconnecting any internal electrical
plug or other electrical connection.
(3) Connecting a test substitute in parallel with an elec-
trolytic capacitor.
Caution: A wrong part substitution or incorrect
polarity installation of electrolytic capacitors may result
in an explosion hazard.
2. Do not spray chemicals on or near this VCR + DVD
RECODER or any of its assemblies.
3. Unless specified otherwise in this service data, clean
electrical contacts by applying an appropriate contact
cleaning solution to the contacts with a pipe cleaner,
cotton-tipped swab, or comparable soft applicator.
Unless specified otherwise in this service data, lubrication
of contacts is not required.
4. Do not defeat any plug/socket B+ voltage interlocks with
whitch instruments covered by this service manual might
be equipped.
5. Do not apply AC power to this VCR + DVD RECODER
and / or any of its electrical assemblies unless all solid-
state device heat sinks are correctly installed.
6. Always connect the test instrument ground lead to an
appropriate ground before connecting the test instrument
positive lead. Always remove the test instrument ground
lead last.
Insulation Checking Procedure
Disconnect the attachment plug from the AC outlet and turn
the power on. Connect an insulation resistance meter (500V)
to the blades of the attachment plug. The insulation resis-
tance between each blade of the attachment plug and acces-
sible conductive parts (Note 1) should be more than 1M-
ohm.
Note 1: Accessible Conductive Parts include Metal panels,
Input terminals, Earphone jacks,etc.
Electrostatically 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 transistors and semiconductor chip components.
The following techniques should be used to help reduce the
incidence of component damage caused by static electricity.
1. Immediately before handling any semiconductor compo-
nent or semiconductor-equipped assembly, drain off any
electrostatic charge on your body by touching a known
earth ground. Alternatively, obtain and wear a commer-
cially available discharging wrist strap device, 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 aluminum 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”can
generate electrical charges sufficient to damage ES
devices.
5. Do not use freon-propelled chemicals. These can
generate an electrical charge sufficient to damage ES
devices.
6. Do not remove a replacement ES device from its protec-
tive package until immediately before you are ready to
install it. (Most replacement ES devices are packaged with
leads electrically shorted together by conductive foam,
aluminum foil,or comparable conductive material).
7. Immediately before removing the protective material from
the leads of a replacement 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. (Normally harmless motion such
as the brushing together of your clothes fabric or the lifting
of your foot from a carpeted floor can generate static elec-
tricity sufficient to damage an ES device.)

BURNING DISC
•For up-dating the DVD program using the disc, it must burning the disc which include the DVD software.
•For recorder combi set which using the disc downloader program are DVD Program and Loader Program.
•In 2nd generation for recorder combi can download the DVD program and Loader program one by one, or all
together.
•If you format like number 1 you’ll see capture like (figure 1)
•And you have three choice:
1. Main. It’s mean if you chose this it’ll up-dating only DVD prgram.
2. Loader.It’s mean if you chose this it’ll up-dating only Loader program.
3. ALL. It’s mean if you chose this it’ll up-dating DVD and Loader program.
•If you format like number 2 you’ll not see capture like figure 1 that give you choices, you have no choice only
update DVD program
1-5
UP-DATING PROGRAM
* There is two way to format disc DVD Program
1. DVD and LOADER program format in one
disc
2. Only DVD program format in one disc
(Figure 1)
Number 1
Number 2

1-6
DVD UPGRADE INSTRUCTION
FORMAT NO 1
1. Press POWER KEY to turn on.
2. After booting, insert the upgrade disc, and you will see massage like [FIGURE 1]
3. Press “REC”key (front or remote) 3 times and you will see as [FIGURE 2] with remote Chose one of them
then Press enter
4. For update both of them [MAIN & LOADER] we chose “ALL”and first you will see [FIGURE 3] DVD update
→Check the “Current Version”and “New CD Write Version”and press “REC”key.
5. The DVD update will be on progress.And when finish update MAIN Version it’s automatically continue to
Update Loader Version and You will see [FIGURE 4]
→Check the “Current Version”and “New CD Write Version “and Press “REC”key once more
6. The LOADER update will be on progress. And tray will open.
7. Remove the disc and wait until finish
8. The tray will be close and open automatically after completing “UNDER UPDATE”100%
9. Turn off the unit
10. Turn on again the unit is operation with new software
FORMAT NO 2
1. Press POWER KEY to turn on.
2. After booting, insert the upgrade disc, and you will see massage like [FIGURE 1]
3. Press “REC”key (front or remote) 3 times
4. The DVD update will be on progress.
→Check the “Current Version”and “New CD Write Version “and Press “REC”key once more
5. The tray will be open automatically after completing “UNDER UPDATE”100%
6. Remove the disc andTurn off the unit
7. Turn on again the unit is operation with new software
[FIGURE 1] [FIGURE 2] [FIGURE 3] [FIGURE 4]
[FIGURE 1] [FIGURE 2]

1-7
SPECIFICATIONS
General
Power requirements AC 200-240V, 50/60 Hz
Power consumption 27W
Dimensions (approx.) 430 X 78.5 X 310 mm (w x h x d)
Mass (approx.) 5.2 kg
Operating temperature 5°C to 35°C
Operating humidity 5 % to 90 %
Television system PAL B/G, PAL I/I, SECAM D/K colour system
Recording format PAL
SYSREM
Laser Semiconductor laser, wavelength 650 nm
Video head system Double azimuth 4 heads, helical scanning
Signal system PAL
Recording
Recording format VD VideoRecording, DVD-VIDEO
Recordable discs DVD-ReWritable, DVD-Recordable, DVD+ReWritable, DVD+Recordable
Recordable time Approx. 1 hour 20 minutes (XP mode), 2 hours (SP mode),
4 hours (LP mode), 6 hours (EP mode)
Video recording format
Sampling frequency 27MHz
Compression format MPEG 2
Audio recording format
Sampling frequency 48kHz
Compression format Dolby Digital
Playback
Frequency response DVD (PCM 48 kHz): 8 Hz to 22 kHz, CD: 8 Hz to 20 kHz
DVD (PCM 96 kHz): 8 Hz to 44 kHz
Signal-to-noise ratio More than 100 dB (AUDIO OUT connector)
Harmonic distortion Less than 0.008% (AUDIO OUT connector)
Dynamic range More than 95 dB (AUDIO OUT connector)
Inputs
AERIAL IN Aerial input, 75 ohms
VIDEO IN 1.0 Vp-p 75 ohms, sync negative, RCA jack x 1 / SCART x 2
AUDIO IN 0 dBm more than 47 kohms, RCA jack (L, R) x 1 / SCART x 2
DV IN 4 pin (IEEE 1394 standard)
S-VIDEO IN (Y) 1.0 V (p-p), 75 Ω, negative sync, Mini DIN 4-pin x 1
(C) 0.3 V (p-p) 75 Ω
Outputs
VIDEO OUT 1.0 Vp-p 75 ohms, sync negative, SCART x 2
S-VIDEO OUT (Y) 1.0 V (p-p), 75 Ω, negative sync, Mini DIN 4-pin x 1
(C) 0.3 V (p-p) 75 Ω
COMPONENT VIDEO OUT (Y) 1.0 V (p-p), 75 Ω, negative sync, RCA jack x 1
(Pb)/(Pr) 0.7 V (p-p), 75 Ω, RCA jack x 2
Audio output (digital audio) 0.5 V (p-p), 75 Ω, RCA jack x 1
Audio output (optical audio) 3 V (p-p), 75 Ω, Optical connector x 1
Audio output (analog audio) 2.0 Vrms (1 KHz, 0 dB), 600 Ω, RCA jack (L, R) x 1 / SCART

2-1
SECTION 2
EXPLODED VIEWS
CONTENTS
EXPLODED VIEWS.....................................................................................................................2-2
1. CABINET AND MAIN FRAME SECTION.................................................................................2-2
2. DECK MECHANISM SECTION(RS-01A) ................................................................................2-3
3. DECK MECHANISM SECTION(D37(N)) .................................................................................2-4
4. PACKING ACCESSORY SECTION..........................................................................................2-7

2-2
EXPLODED VIEWS
1. CABINET AND MAIN FRAME SECTION
OPTIONAL PART
A
AF
D
BB
D
C
E
E
C
280
285 286
283
469 284
281
463
321
260 322
267
320
330
261
261
452
A44
261
466
469
A41
A46
CABLE3
CABLE8
CABLE7
CABLE6
CABLE2
CABLE1
CABLE4
CABLE5
CABLE9
A53
A47
A52
274
469
323
321
324
324
A54
A00
300
250
272
463
463
463
470
457
465
465
268
A60
A43
468
452
452
452
OPTIONAL PART OPTIONAL
PART
KARAOKE OPTIONAL
PART
KARAOKE ONLY
OPTIONAL PART
OPTIONAL PART
OPTIONAL PART
MEMORY
SMPS
JUNCTION
HDMI
DVD
VCR
F
A50
OPTIONAL PART
RC19'S
A55
OPTIONAL PART
OPTIONAL PART
RC17/18'S
A50

2-3
2. DECK MECHANISM SECTION(RS-01A)
1034
1030
1025
1041
1432
1437
1434
1032
1033
1038
1011
1432
1020
1036
1432
Main C.B.A
1001
1431
1003 1002
1026
A001
A60
A002
1016
1433
1017
1013
1015
1012
1439
1047
1048
1046
1014
1018
1019 1043 1045
1044
1042
A005

2-4
3. DECK MECHANISM SECTION(D37(N))
1) FRONT LOADING MECHANISM SECTION
100
A21
A23
A24
032
109
A22
054A
054
115
116
110
112 113 114
103 105
102
106
107

2-5
3. DECK MECHANISM SECTION(D37(N))
2) MOVING MECHANISM SECTION (1)
008
011
031
079
017
032 024 406
031
021
028
029
026
A03
027
022
003
004
006
007
014
015
009
409
013
016
012
OPTIONAL PART
A01
405

2-6
3. DECK MECHANISM SECTION(D37(N))
3) MOVING MECHANISM SECTION (2)
052
517
061
056
518 052A
055
410
032
077
076
078
060
051
064
A11 A12
067 066
065
068
069
070
023
080
058

2-7
4. PACKING ACCESSORY SECTION
BATTERY
808
BAG
804
PACKING
803
806
INSTRUCTION ASSEMBLY
CABLE(COAXIAL)
810 CABLE ASS'Y RF
801
REMOCON
900
BOX CARTON
802
PACKING
803
811
812
PLUG ASS'Y 1WAY
PLUG ASS'Y 2WAY
OPTIONAL PARTS
821 SCART CABLE

3-1
SECTION 3
ELECTRICAL
CONTENTS
OVERALL WIRING DIAGRAM..............................3-2
VCR PART
ELECTRICAL ADJUSTMENT
PROCEDURES............................................................3-3
VCR ELECTRICAL TROUBLESHOOTING
GUIDE.............................................................................3-4
1. POWER(SMPS) CIRCUIT.......................................3-4
2. SYSTEM/KEY CIRCUIT ..........................................3-7
3. SERVO CIRCUIT.....................................................3-8
4. Y/C CIRCUIT..........................................................3-11
5. HI-FI CIRCUIT.......................................................3-15
6. TUNER/IF CIRCUIT...............................................3-18
BLOCK DIAGRAMS................................................3-20
1. POWER(SMPS) BLOCK DIAGRAM......................3-20
2. TU/IF BLOCK DIAGRAM.......................................3-22
3. VPS BLOCK DIAGRAM ........................................3-23
4. Y/C BLOCK DIAGRAM..........................................3-24
5. HI-FI BLOCK DIAGRAM........................................3-26
6. SYSTEM BLOCK DIAGRAM.................................3-28
7. SCART & SWICH BLOCK DIAGRAM...................3-30
CIRCUIT DIAGRAMS..............................................3-32
1. POWER(SMPS) CIRCUIT DIAGRAM...................3-32
2. TUNER CIRCUIT DIAGRAM.................................3-34
3. A/V CIRCUIT DIAGRAM........................................3-36
4. HI-FI CIRCUIT DIAGRAM .....................................3-38
5. SYSTEM CIRCUIT DIAGRAM...............................3-40
6. SCART CIRCUIT DIAGRAM
(SCART MODEL ONLY).........................................3-42
7. KEY CIRCUIT DIAGRAM ......................................3-44
8. KARAOKE CIRCUIT IAGRAM
( KARAOKE MODEL ONLY ).................................3-46
9. HDMI CIRCUIT DIAGRAM
( HDMI MODEL ONLY ).........................................3-48
•WAVEFORMS .........................................................3-50
•CIRCUIT VOLTAGE CHART...................................3-52
PRINTED CIRCUIT DIAGRAMS.........................3-56
1. VCR P.C.BOARD(TOP VIEW)...............................3-56
2. VCR P.C.BOARD(BOTTOM VIEW).......................3-58
3. SMPS P.C.BOARD ................................................3-60
4. HDMI P.C.BOARD(HDMI MODEL ONLY) .............3-62
5. KARAOKE P.C.BOARD
(KARAOKE MODEL ONLY)...................................3-62
6. KEY P.C.BOARD ...................................................3-64
VDR PART
VDR ELECTRICAL TROUBLESHOOTING
GUIDE...........................................................................3-66
1. POWER(SMPS) CIRCUIT.....................................3-66
2. NO COMPONENT VIDEO SIGNAL WHEN
PLAYING DISC......................................................3-69
3. NO COMPOSITE / S-VIDEO SIGNAL WHEN
PLAYING DISC......................................................3-70
4. NO TV, EXTERNAL INPUT VIDEO SIGNAL.........3-71
5. WHEN PLAYING DISC, NO AUDIO OUTPUT......3-72
6. NO OPTICAL / DIGITAL OUTPUT ........................3-73
7. NO TUNER AUDIO OUTPUT................................3-74
8. NO EXTERNAL INPUT 1, 2, 3 AUDIO..................3-75
BLOCK DIAGRAMS................................................3-76
1. VDR SET TOTAL BLOCK DIAGRAM....................3-76
2. VDR MAIN H/ W BLOCK DIAGRAM.....................3-77
3. POWER BLOCK DIAGRAM..................................3-78
4. AUDIO IN/OUT BLOCK DIAGRAM .......................3-79
5. CPU & CONTROL REGISTER &
MEMORY SLOT BLOCK DIAGRAM.....................3-80
6. VIDEO IN/OUT BLOCK DIAGRAM.......................3-81
7. DV1394 IN/OUT BLOCK DIAGRAM .....................3-82
8. MEMORY CARD IN/OUT BLOCK DIAGRAM.......3-83
CIRCUIT DIAGRAMS..............................................3-84
1. BGA 308P CIRCUIT DIAGRAM.............................3-84
2. DDR & B TO B CONNECTOR
CIRCUIT DIAGRAM ..............................................3-86
3. POWER, FLASH, CONNECTOR CIRCUIT
DIAGRAM..............................................................3-88
4. RST, CONTROL/STATUS_REG., ATAPI,
HOST_CPLD, LATCH CIRCUIT DIAGRAM..........3-90
5. VIDEO/AUDIO CODEC, MSP
CIRCUIT DIAGRAM ..............................................3-92
6. DV1394, MEMORY, HDMI CIRCUIT DIAGRAM...3-94
•WAVEFORMS .........................................................3-96
•CIRCUIT VOLTAGE CHART...................................3-98
PRINTED CIRCUIT DIAGRAMS.......................3-100
1. VDR P.C.BOARD(TOP VIEW).............................3-100
2. VDR P.C.BOARD(BOTTOM VIEW).....................3-102

3-2
OVERALL WIRING DIAGRAMS
VCR BOARD
40393837363534333231302928272625242322212019181716151413121110987654321
TU_A_L_OUT
38
GND
39
TU_A_R_OUT
40
E5 _B/Pb_OUT
26
GND
27
E5_R/Pr_OUT
28
GND
29
VCR_A_L_OUT
30
GND
31
VCR_A_R_OUT
32
GND
33
DVD_A_L_OUT
34
GND
35
DVD_A_R_OUT
36
GND
37
PMV02
GND
E5 _G/Y_OUT
GND
E5 _C_OUT
GND
E5 _Y_OUT
GND
VCR_V_IN
GND
E5_DVD_V_OUT
GND
MIXED_V_OUT
GND
SIF
SIF
GND
Z_MUTE_R
Z_MUTE_L
RGB_SYNC
GND
B_IN
GND
G_IN
GND
R_IN
25
2423
2221
2019
1817
1615
1413
1211
109
87
65
43
21 PMV02
2019181716151413121110987654321 PMV01
MIC_IN_R
GND
MIC_IN_L
GND
MIC_DET_L
SUPER_C
GND
SUPER_Y
GND
TPA+
TPA-
TPB+
TPB-
GND
SPI_CS
SPI_MISO
SPI_MOSI
SPI_CLK
VDR_RESET
IEC958
2019
1817
1615
1413
1211
109
87
65
43
21 PMV01
PMP01 121110987654321
GND
DVD PWR+H
PWR+H
GND
PML0133V
REG12V
GND
13.5VA
CapVcc
GND
5V
5.3VA
12
11
109
87
65
43
21 P101
PD301 987654321
HIFI B PB
HIFI REC
HIFI A PB
LP A PB
LP REC
LP B PB
SP B PB
SP REC
SP A PB
9
87
65
43
21 PD301
PD30
3
21
F/E (+)
F/E (-)
21
PD30
3
PD302 654321
A. PB
A. REC
CTL (-)
CTL (+)
6
5
43
21 PD302
DECK
PMC01 121110987654321
DRUM CTL
DPG/DFG
L/M CTL
CAP CTL
DRUMVCC 13.5VA
S. GND
MOTOR GND
I-LIMIT
CAP REV ëHí
SERVO VCC
CAP VCC
CFG
12
11
109
87
65
43
21 PMC01
PMP0
1
21
FAN
GND
21
P101
FAN
105V10 95V98GND873.3V763.3V65GND542.5V432.5V32GND2
PMS01
1
REG12
V
1
P102
VDR BOARD
40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
9 8 7 6 5 4 3 2 1
GND15 IORDY14 GND13 DMACK12 GND11 INT_ATA10 NC9ATA_A18NC7ATA_A06ATA_A25CS1FX4CS3FX3NC2
J2
GND1
PMC01
HD_ATA330 HD_ATA1229 HD_ATA228 HD_ATA1327 HD_ATA126 HD_ATA1425 HD_ATA024 HD_ATA1523 GND22 NC21 DMARQ20 GND19 DIOW18 GND17 DIOR16
RSTATA40 GND39 HD_ATA738 HD_ATA837 HD_ATA636 HD_ATA935 HD_ATA534 HD_ATA1033 HD_ATA432 HD_ATA1131
40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
9 8 7 6 5 4 3 2 1
VO_D415 VO_D314 VO_D213 VO_D112 VO_D011 GND10 VO_CLK9GND8GND7AO_MCLKO6GND5AO_IEC9584NC35VD2
PMH01
5VD1
PMH01
SDA30 HDMI_IRQ29 GND28 GND27 VO_D1526 VO_D1425 VO_D1324 VO_D1223 VO_D1122 VO_D1021 VO_D920 VO_D819 VO_D718 VO_D617 VO_D516
1V840 1V839 1V838 NC37 3V3D36 3V3D35 GND34 GND33 SCL32 HDMI_RST31
LOADER
HDMI MEMORY CARD
40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
9 8 7 6 5 4 3 2 1
GND15 IORDY14 GND13 DMACK12 GND11 INT_ATA10 NC9ATA_A18NC7ATA_A06ATA_A25CS1FX4CS3FX3NC2
PML01
GND1
PML01
HD_ATA330 HD_ATA1229 HD_ATA228 HD_ATA1327 HD_ATA126 HD_ATA1425 HD_ATA024 HD_ATA1523 GND22 NC21 DMARQ20 GND19 DIOW18 GND17 DIOR16
RSTATA40 GND39 HD_ATA738 HD_ATA837 HD_ATA636 HD_ATA935 HD_ATA534 HD_ATA1033 HD_ATA432 HD_ATA1131
P103 4321
5V
GND
GND
12V
43
21 P103
SMPS
KEY
TIMER
5GND545.0V43DUB-LED-H32KEY-RTN-22
PM602
1KEY-RTN-11
PV601

3-3
ELECTRICAL ADJUSTMENT PROCEDURES
1. Servo Adjustment
1) PG Adjustment
•Adjustment And Specification
•Test Equipment
a) OSCILLOSCOPE : PAL SP TEST TAPE
MODE
PLAY
• Adjustment Procedure
a) Insert the SP Test Tape and play.
b) Connect the CH1 of the oscilloscope to the H/SW and CH2 to the “VCR VIDEO”TP for the VCR.
c) Trigger the mixed Combo Video Signal of CH2 to the CH1 H/SW, and then check the distance (time dif-
ference), which is from the selected A(B) Head point of the H/SW signal to the starting point of the ver-
tical synchronized signal, to 6.5H ± 0.5H (416µs, 1H=64µs).
•PG Adjustment Method
a-1) Playback the SP standard tape
b-2) Wait for 3seconds with F/P “REC”key and “PLAY”key presseed at the same time. < Digitron[ - - ] >
c-3) Repeat the above step(No.b-2), then it finishes the PG adjusting automatically. < Digitron[ PG ] >
d-4) Stop the playback, then it goes out of PG adjusting mode after mony the PG data.
•CONNECTION
•WAVEFORM
V.Out
H/SW(TP) R/C TRK JIG KEY 6.5 ± 0.5H
MEASUREMENT POINT ADJUSTMENT POINT SPECIFICATION
H/SW
(TP)
TP
(VCR
VIDEO)
(CH2)
(CH1)
OSCILLOSCOPE
CH1 CH2
R/C KEY
H/SW
(TP)
VCR BOARDVDR BOARD
"VCR VIDEO" TP
VCR PART
H/SW
Composite
VIDEO
6.5H(416µs)

3-4
VCR ELECTRICAL TROUBLESHOOTING GUIDE
1. Power(SMPS) CIRCUIT
NO 5.3VA.
Replace the F101
(Use the same Fuse)
Is the F101 normal?
Is the TH01
Normal?
Is the BD101
Normal?
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
Replace the BD101
Replace the TH01
Is the D102
normal?
Check or Replace
the D102
Replace the D121
Replace the IC103
Replace the D126
Replace the D129
Replace the D130
Replace the D127
Replace the D128
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
Is the Vcc (11V - 18V)
supplied to IC101 Pin2?
NO
Is the D121
normal?
Is there about 2.5V
at the IC103 Pin1?
Is the D126
normal?
Is the D129
normal?
Is the D130
normal?
Is the D127
normal?
Is the D128
normal?
YES
Power Line of Main
PCB(VCR) is short

3-5
VCR ELECTRICAL TROUBLESHOOTING GUIDE
No 12VA
Check or Replace
the D126
Is the Vcc(13V)
supplied to C130?
Check or Replace
the Cap / Drum
Is the D132
Normal?
NO
NO Replace the D132
YES
YES
(To Cap, Drum Motor ) No REG 12V
Check or Replace
the D126
Check the ‘PWR CTL
“H”’signal from µ-com
Check the 33V Line
Replace the Q126
Is the Vcc(13V) sup-
plied to Q126Collector?
Is the Vcc(33V) sup-
plied to Q126 Base?
Is the Q126 Nomal?
Check or Replace
the D126
NO
NO
NO
YES
YES
YES
NO VFD
Check or Replace
the R107
Is the R107
Normal?
Is the D128
Normal?
NO
Check or Replace
the D128
Check or Replace
the ZD151
NO
NO
YES
Is the ZD151
Normal?
Check or Replace
the D127
YES
YES
No 33V
Check or Replace
the D130
Is the Vcc(33V) sup-
plied to Q123 Emittor?
Is the Q123 Base
‘H’?
NO
Check the ‘PWR CTL
“H”’signal from µ-com
NO
YES
Check or Replace
the Q123
YES

3-6
VCR ELECTRICAL TROUBLESHOOTING GUIDE
No 28V (HSR)
Check or Replace
the D129
Is the Vcc(30V) supplied
to Q120 Collector?
Is the Vcc(33V) supplied
to Q121 Collector?
Is the Vcc(30V) sup-
plied to Q120 Base?
NO
NO Check or Replace
the ZD153
NO
Check the ‘HSR “H”
signal from µ-com
Check or Replace the
Q121/Q122 & 33V line
YES
YES
Check or Replace
the Q120
YES