LG DR1F9H User manual

DVD RECORDER
SERVICE MANUAL
MODEL : DR1F9H
CAUTION
BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS”
IN THIS MANUAL.
MODEL : DR1F9HSERVICE MANUAL
P/NO : 3829RHN005L FEBRUARY,2006

CONTENTS
SECTION 1 . . . . SUMMARY
SECTION 2 . . . . CABINET & MAIN CHASSIS
SECTION 3 . . . . ELECTRICAL
SECTION 4 . . . . RS-01A LOADER PART
SECTION 5 . . . . REPLACEMENT PARTS LIST

1-1
SECTION 1
SUMMARY
CONTENTS
PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS.............. 1-2
SERVICING PRECAUTIONS .................................................................................................. 1-3
• General Servicing Precautions
• Insulation Checking Prodedure
• Electrostatically Sensitive Devices
SERVICE INFORMATION FOR EEPROM IC SETTING.................................................. 1-4
FLASH UPGRADE...................................................................................................................... 1-5
LOADER UPGRADE.................................................................................................................. 1-7
SPECIFICATIONS ...................................................................................................................... 1-9

1-21-2
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
triangle is intended to alert the service personnel to the presence
of noninsulated “dangerous voltage”that may be of sufficient
magnitude 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 THISTEST. 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 DVD Recorder covered by
this service data and its supplements and addends, read and
follow the SAFETY PRECAUTIONS. NOTE : if unforeseen
circumstances create conflict between the following servic-
ing precautions and any of the safety precautions in this pub-
lications, always follow the safety precautions.
Remembers Safety First:
General Servicing Precautions
1. Always unplug the DVD RecorderAC power cord from the
AC power source before:
(1)Removing or reinstalling any component, circuit board,
module, or any other assembly.
(2)Disconnection 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 DVD Recorder 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 DVD Recorder and/or any
of its electrical assemblies unless all solid-state device
heat sinks are cerrectly installed.
6. Always connect test instrument ground lead to the
appropriate ground before connection 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 including Metal pan-
els, 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 grouned-tip soldering iron to solder or unsolder
ES devices.
4. Use only an anti-static solder removal device. Some
solder removal devices not classified a “anti-static”can
generate electrical charges sufficient to damage ES
devices.
5. Do not use freon-propelled chemicals. These can
generate 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.)

1-4
SERVICE INFORMATION FOR EEPROM IC SETTING
MICOM START
Press the "CLEAR" key on the
Remote controller and the
"PROG. - " key one the Front Panel
the same time, then it goes in to
Tracking initial mode.
EEPROM ID CHECK
2 BYTE(B3,248,249) NAME HEX BINARY
OPT1 91 00000000
OPT2 20 00000000
OPT3 00 00000000
OPT4 49 00000000
OPT5 8F 00000000
OPT6 9E 00000000
OPT7 15 00000000
OPT8 13 00000000
WRITE : OK EXIT : MP
MOVE : < > EDIT :
MASK : 00 , EEP : FF(0R), D17
(Each mask ,eeprom, It shows a
development release version.)
*** EEPROM INITIAL ***
- SETUP is displayed in the field if pressing the Front PROG. - & + Key with the Remote Control number "clear" key pressed in the status of
powering on.
- AUTO SEARCH is done since the initial screen of ACMS is serviced if powering on.
DETECT NEW EEPROM (OPTION EDIT SCREEN)
OPTION condition of Present time the
CHECK There is a Possibility of doing and
the OPTION the REWRITE it is possible.
OPTION DATA READ
5TIME & COMPARE
MICOM NORMAL
OPERATION START
ID OK?
OPTION CONFIRMATION MODE
Yes
Yes
No
No

1-5
FLASH UPGRADE
1. MAKING UPGRADE DISC
1) Physical format must be ISO9660 or JOLIET file system.
2) CD Volume label is unimportant.
3) Write DR100 BE Upgrade File on Root.
2. UPGRADE FLASH
1) Put Flash Upgrade Disc in the DVD Player.
2) After Disc Reading, you can see below screen.
3) Press REC KEY 3 times. It will start Inspection.
* OPTIONAL PARTS
•DR100 8601 64M NTSC) :
LG_DR100_8601NT64_UPDATE.590
•DR100 860164M (PAL ) :
LG_DR100_8601PAL64_UPDATE.590
•DR100 860132M (NTSC) :
LG_DR100_8601NT_UPDATE.590
•DR100 860132M (PAL ) :
LG_DR100_8601PAL_UPDATE.590
•DR100 8603 64M (NTSC) :
LG_DR100_8603NT_UPDATE.590
•DR100 8603 64M (PAL ) :
LG_DR100_8603PAL_UPDATE.590
< example- Nero Burning Rom >

1-6
4) You can see both current and upgrade version.
Press REC KEY.
5) Upgrading.
6) After Upgrading, you can see the below screen. And automatically open tray.
Remove the Disc. Reboot the set.

1-7
LOADER UPGRADE
1.MAKING UPGRADE DISC
1) Physical format must be ISO9660 or JOLIET file system
2) Name the Volume label as “DRIVE_UP”.
3) Write DvdSLxx.rs1, YASMSLxx.BIN on Root like below.(xx is Version)
2. LOADER UPGRADE
1) Put Loader Upgrade Disc in the DVD Player.
2) After Disc Reading, you can see the below screen.
3) Press REC KEY 3 times.
< example- Nero Burning Rom >

1-8
4) After Tray open, remove the disc and close the tray.
5) It shows both the current version and upgrade version.
Press REC KEY.
6) Upgrading.
7) After finishing Upgrade, it shows the below screen and powers off

1-9
SPECIFICATIONS
•GENERAL
Power requirements AC 120V, 60 Hz
Power consumption 22W
Dimensions (approx.) 430 X 54 X 275 mm (w x h x d) without feet
Mass (approx.) 4.1 kg
Operating temperature 5°C to 35°C
Operating humidity 5 % to 90 %
Television system PAL I, B/G, I/I, SECAM D/K, K1 color system
Recording format PAL
•RECORDING
Recording format DVD Video Recording, DVD-VIDEO
Recordable media DVD-ReWritable, DVD-Recordable, DVD+ReWritable,
DVD+Recordable, DVD+Recordable (Double Layer), DVD-RAM
Recordable time DVD (4.7GB): Approx. 1 hour (XP mode), 2 hours (SP mode),
4 hours (LP mode), 6 hours (EP mode)
DVD+R DL (8.5GB): Approx. 3 hour (XP mode),
3 hours 40 minutes (SP mode),
7 hours 10 minutes (LP mode),
10 hours 30 minutes (EP mode)
Video recording format
Sampling frequency 27MHz
Compression format MPEG 2 (VBR support)
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
ANTENNA IN Antenna/Cable input, 75 ohms
VIDEO IN 1.0 Vp-p 75 ohms, sync negative, RCA jack x 2 / SCART x 2
AUDIO IN 2.0 Vrms more than 47 kohms, RCA jack (L, R) x 2 / SCART x 2
S-VIDEO IN (Y) 1.0 V (p-p), 75 Ω, sync negative, Mini DIN 4-pin x 1
(C) 0.3 V (p-p) 75 Ω
DV IN 4 pin (IEEE 1394 standard)
•OUTPUTS
VIDEO OUT 1 Vp-p 75 Ω, sync negative, RCA jack x 1 / SCART x 2
S-VIDEO OUT (Y) 1.0 V (p-p), 75 Ω, sync negative, 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, sync negative, RCA jack x 1
(Pb)/(Pr) 0.7 V (p-p), 75 Ω, RCA jack x 2
HDMI video/audio output 19 pin (HDMI standard, Type A)
(DR197H only)
Audio output (digital audio) 0.5 V (p-p), 75 Ω, RCA jack x 1
Audio output (optical audio) 3 V (p-p), Optical connector x 1
Audio output (analog audio) 2.0 Vrms (1 KHz, 0 dB), 600 Ω, RCA jack (L, R) x 1 / SCART x 2

2-1
SECTION 2
CABINET & MAIN CHASSIS
CONTENTS
EXPLODED VIEWS ....................................................................................................................2-2
1. Cabinet and Main Frame Section ..........................................................................................2-2
2. Deck Mechanism Section(RS-01A) .......................................................................................2-3
3. Packing Accessory Section ...................................................................................................2-4

2-2
EXPLODED VIEWS
1. Cabinet and Main Frame Section
C
D
463
468
463
251
275
275 452
452
452
251
A60
A43
A50
CABLE9
CABLE5
CABLE3
CABLE1
JUNCTION
A55
468
273
A
B
A
C
D
A54
A46
471
300
A47
468
A56
A44
A52
253
463
463
250
463
OPTIONAL PART HDMI MODEL ONLY
OPTIONAL PART HDMI MODEL ONLY
OPTIONAL PART MEMORY
HDMI BOARD
MAIN BOARD
SMPS
I/O BOARD
CABLE3
272
274
265
465
320
264
260
261
261
261
465
267
268
467
468
468
468
468
OPTIONAL PART
OPTIONAL PART
B
280
465
OPTIONAL PART
TU701
A
5
4
3
2
1
BCD

2-32-3
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
808 Battery
Cable, Coaxial
Plug Ass'y, 1Way
Plug Ass'y, 2Way
Bag
Packing
Remote Control
Owner's Manual
Packing
Box
806
804
803
811
Plug Ass'y, 1Way
814
812
801
900
802
803
810 CABLE ASS'Y
FLAT CABLE
822
OPTIONAL PARTS
3. Packing Accessory Section
832 DISC

3-1
SECTION 3
ELECTRICAL
CONTENTS
VDR PART
ELECTRICAL TROUBLESHOOTING GUIDE...................................................................................3-2
1. POWER SUPPLY ON SMPS BOARD........................................................................................3-2
2. POWER SUPPLY ON I/O BOARD..............................................................................................3-4
3. SYSTEM CIRCUIT PART..........................................................................................................3-11
4. DISC NOT RECOGNIZED ........................................................................................................3-11
5. WHEN PLAYING DISC, NO AUDIO OUTPUT..........................................................................3-12
6. NO OPTICAL / DIGITAL OUTPUT............................................................................................3-13
7. NO TUNER AUDIO OUTPUT ...................................................................................................3-14
8. NO EXTERNAL AUDIO INPUT.................................................................................................3-15
9. NO RGB / COMPONENT VIDEO SIGNAL WHEN PLAY DISC ...............................................3-16
10. NO COMPOSITE / S-VIDEO SIGNAL WHEN PLAY DISC ....................................................3-17
11. NO TV, EXTERNAL INPUT VIDEO SIGNAL...........................................................................3-18
12. NO DV(IEEE 1394) INPUT (VIDEO/AUDIO) SIGNAL............................................................3-19
BLOCK DIAGRAMS........................................................................................................................3-20
1. POWER BLOCK DIAGRAM......................................................................................................3-20
2. MAIN POWER BLOCK DIAGRAM ...........................................................................................3-22
3. VIDEO IN BLOCK DIAGRAM ...................................................................................................3-24
4. VIDEO OUT BLOCK DIAGRAM ...............................................................................................3-26
5. AUDIO IN BLOCK DIAGRAM ...................................................................................................3-28
6. AUDIO OUT BLOCK DIAGRAM ...............................................................................................3-30
7. SYSTEM MAIN BLOCK DIAGRAM ..........................................................................................3-32
8. I/O µ-COM BLOCK DIAGRAM................................................................................................. 3-34
9. SCART BLOCK DIAGRAM(SCART MODEL ONLY)................................................................3-36
10. HDMI BLOCK DIAGRAM (HDMI MODEL ONLY)...................................................................3-38
11. MEMORY BLOCK DIAGRAM (MEMORY SLOT MODEL ONLY)...........................................3-40
CIRCUIT DIAGRAMS ......................................................................................................................3-42
1. SMPS CIRCUIT DIAGRAM.......................................................................................................3-42
2. MAIN POWER CIRCUIT DIAGRAM.........................................................................................3-44
3. MPEG CIRCUIT DIAGRAM......................................................................................................3-46
4. A.LATCH/FLASH/DDR CIRCUIT DIAGRAM.............................................................................3-48
5. LOADER/DV CIRCUIT DIAGRAM............................................................................................3-50
6. I/O µ-COM CIRCUIT DIAGRAM ...............................................................................................3-52
7. TUNER/MPX/ADC/DAC/JACK CIRCUIT DIAGRAM ................................................................3-54
8. DECODER CIRCUIT DIAGRAM...............................................................................................3-56
9. HDMI CIRCUIT DIAGRAM........................................................................................................3-58
10. TIMER CIRCUIT DIAGRAM....................................................................................................3-60
11. KEY CIRCUIT DIAGRAM........................................................................................................3-62
•WAVEFORMS.............................................................................................................................3-64
•CIRCUIT VOLTAGE CHART.......................................................................................................3-66
PRINTED CIRCUIT DIAGRAMS......................................................................................................3-72
1. MAIN P.C.BOARD(TOP SIDE) .................................................................................................3-72
2. MAIN P.C.BOARD(BOTTOM SIDE)..........................................................................................3-74
3. I/O P.C.BOARD.........................................................................................................................3-76
4. HDMI P.C.BOARD(OPTIONAL PARTS)....................................................................................3-76
5. KEY P.C.BOARD.......................................................................................................................3-78
6. TIMER P.C.BOARD...................................................................................................................3-78
7. POWER P.C.BOARD ................................................................................................................3-79

3-2
ELECTRICAL TROUBLESHOOTING GUIDE
VDR PART
Replace BD101
Replace F101
(Use the same Fuse)
No .5.3VA
Is the F101 Good?
Is R101 Good?
Is BD101
Good?
NO
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
NOYES
YES
YES
YES
YES
YES
Replace R101
Is D102 Good?
Check or Replace
D102
Replace D123
Replace IC103
Replace IC102
Is D121 Good?
Is 2.5V present
at IC103 Pin1?
Is IC102 Good?
Replace D124
Replace D125
Is D124 Good?
Is D125 Good?
NO
YES
YES
Replace D127
Is the D127 Good?
Power Line of I/O
PCB is shorted
Is Vcc (10V - 16V)
supplied to IC101 Pin7?
1. POWER SUPPLY ON SMPS BOARD

3-3
No 12V
Is Vcc(14.0V) supplied to IC131 pin 1?
YES
Check or Replace D127
NO
Is IC131 pin4 ‘H’?
YES
Check the PWR CTL “H”signal
from µ-com
NO
Check or Replace IC131
YES
No 5V
Is Vcc(5.5V) supplied to IC132 pin 1?
YES
Check or Replace D125
NO
Is IC132 pin4 ‘H’?
YES
Check the PWR CTL “H”signal
from µ-com
NO
Check or Replace IC132
YES

3-4
2. POWER SUPPLY ON I/O BOARD
No 12V
Is VCC (14V) supplied to Q164
Collector?
YES
Check D124 on SMPS Board and
Replace
NO
Is 12.5V present at ZD151 & Q164
Base ?
YES
Check Q164 and Replace
NO
Check D126 on SMPS Board and
Replace
NO
Check Q162 and Replace
NO
Check the ‘PWR CTL H’signal from
µ-COM
NO
Is VCC (33V) supplied to Q162
Emitor ?
YES
Is 0V at Q162 Base ?
YES
Is there 5V at R171 and 0.7V at
Q156 Base?
YES
Check Q156 and Replace
YES

3-5
No 5.2V
Is VCC (5.3V) supplied to Q151
Emitor ?
YES
Check 5.3VA on SMPS Board
NO
Is there 0V at D153 and Q156
Collector ?
YES
Check Q151 and Replace
NO
Check the ‘PWR CTL H’signal from
µ-COM
NO
Is there 5V at R171 and 0.7V at
Q156 Base ?
YES
Check Q156 and Replace
YES
No 5VT
Is VCC (5.3V) supplied to Q155
Emitor ?
YES
Check 5.3VA on SMPS Board
NO
Is there 0V at D152 and Q152
Collector?
YES
Check Q155 and Replace
NO
Check the ‘TIMER H’signal from µ-COM
NO
Is there 5V at R180 and 0.7V at
Q152 Base?
YES
Check Q152 and Replace
YES