LG 32GR93U LED Monitor User Guide
- June 12, 2024
- LG
Table of Contents
CONFIDENTIAL
SERVICE MANUAL
LED MONITOR
SERVICE MANUAL
CHASSIS : LM33A
MODEL : 32GR93U
CAUTION
BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
General Specification
- : Item to write directly.
- : Item you select from the list. (If the selected item is not on the list, ask the person in charge to add it and update the template)
– When adding a derivative model, change the name of the sheet after copying and adding the sheet. ex) 1. General Spec (derivative model name)
| No | Category | Item | Data | *Remark |
|---|---|---|---|---|
| 1 | General | *Customer | Brand | |
| *User Model Name | 32GR93U | |||
| *Sales region | Worldwide | |||
| *Chassis Name | LM33A | |||
| *Main PCB P/N | EAX70070301 | |||
| No | Category | Item | Data | *Remark |
| --- | --- | --- | --- | --- |
| 2 | Display | *Module List | EAJ65858001 | ME315QUM-NF1 / BOE |
| *Supply Type | Module | |||
| *Active Area diagonal | 32 | |||
| *Active Area Hor. Size(mm) | 698.112 | |||
| *Active Area Ver. Size(mm) | 392.688 | |||
| *Native Resolution | 3840×2160 | |||
| *Refresh Rate(Max) | 144Hz | |||
| *Refresh Rate (Recommeded) | 144Hz | |||
| *Variable Refresh Rate Range | 48~144Hz | |||
| *Panel Type. | AH-IPS | |||
| *Backlight Type | Edge | |||
| *Backlight Dimming | Global Dimming | |||
| *Aspect Ratio | 16:9 | |||
| *Brightness (Typ.)(cd/m²) | 400 | |||
| *Color Gamut(Typ.) | DCI-P3 95% | |||
| *Color Depth (Panel) | 1.07B | |||
| *Color Bit (Panel) | 10bit | 8bit + 2bit FRC | ||
| *Contast Ratio(Typ.) | 1000:1 | |||
| *Contast Ratio(Min.) | 700:1 | |||
| *Response Time(Off) | 5ms | Panel Spec | ||
| *Response Time(ms) | 1 / 3 / 4 | Faster / Fast / Normal | ||
| *Uniformity | 75% | |||
| *Curved | NO | |||
| *Multi EDID | NO | |||
| *PBP | NO | |||
| *PIP | NO | |||
| *HDR | Display HDR 400 | |||
| *Flicker Free | YES | |||
| *LBL | NO | |||
| *VESA ClearMR | NO | |||
| No | Category | Item | *Support | *Range |
| --- | --- | --- | --- | --- |
| Min | Max | |||
| 3 | Gaming Option | AMD FreeSync™ | YES | 48 |
| NVIDIA G-Sync® | YES | 48 | 144 | G-SYNC® Compatible |
| VESA AdaptiveSync | NO | |||
| *Motion Blur Reduction | NO | |||
| Lighting | YES | Hexagonal | ||
| No | Category | Interface | *Support | *Standard Version |
| *Position | *Port quantity | *Charging Spec (Max) | *Remark | |
| --- | --- | --- | --- | --- |
| 4 | Input Interface (Display) | HDMI | YES | DSC / 2.1 / 2.0 / |
| Rear | 2 | |||
| DP | YES | DSC / 1.4 / 1.2 | Rear | 1 |
| USB-C | NO | |||
| Thunerbolt | NO | |||
| DVI | NO | |||
| D-sub | NO | |||
| RJ45 | NO | |||
| 5 | Output Interface (Display) | HDMI | NO | |
| DP | NO | |||
| USB-C | NO | |||
| Thunderbolt | NO | |||
| 6 | USB Support (Peripheral) | USB-A (Downstream) | YES | USB3.2 Gen1 |
| Rear | 2 | 5V/0.9A | 5Gbps | |
| NO | ||||
| USB-B (Upstream) | YES | USB3.2 Gen1 | Rear | 1 |
| NO | ||||
| USB-C (Downstream) | NO | |||
| NO | ||||
| USB-C (Upstream) *w/o MFDP | NO | |||
| NO | ||||
| No | Category | Item | *Support | *Position |
| *Specification | *Remark | |||
| --- | --- | --- | --- | --- |
| 7 | Audio | Head Phone | YES | Bottom |
| DTS Headphone:X | YES | |||
| Speaker | NO | |||
| RichBass | NO | |||
| MAXX AUDIO | NO | |||
| Optical Digital Audio(Out) | NO | |||
| Line Out | NO | |||
| Audio In | NO | |||
| 8 | Local Key | Joystic | YES | Bottom |
| Tact | NO | |||
| Wheel | NO | |||
| LED Indicator | YES | Bottom | Red | |
| 9 | KVM | USB-B & USB-C | NO | |
| 10 | Auto Pivot | Auto Pivot | NO | |
| No | Category | Item | *Support | Applied Type |
*Remark
---|---|---|---|---|---
11| Sensor Option| ALS| NO| |
FAN| YES| Internal|
TEMP| NO| |
IR| NO| |
Webcam| NO| |
Gyro| NO| |
No| Category| Item*| Provide| Color| Length|
Weight| P/N| Remark
---|---|---|---|---|---|---|---|---
12| Accessory| AccessoryBox| NO| | | | |
Adapter| YES| Black| | | EAY63032212| 19Vdc 5.79A 50~60Hz ADS-120QL-19A-
| |
| |
| |
| |
PSU| NO| | | | |
|
|
Power Cord| YES| Black| 1.55M| | EAD62348835|
Power Extention| NO| | | | |
DP| YES| Black| 1.8M| | EAD65185308| Label : 5K
HDMI| YES| Black| 1.8M| | EAD65912803| HDMI 2.1 cable
USB-C to C| NO| | | | |
USB-A to B(2.0)| NO| | | | |
USB-A to B(3.0)| YES| Black| 1.8M| | EAD65573101|
Thunderbolt| NO| | | | |
DVI| NO| | | | |
D-Sub| NO| | | | |
Remote Control Reciever| NO| | | | |
Remote Controller| NO| | | | |
Webcam Assembly| NO| | | | |
Color Calibrator| NO| | | | |
USB-C to A Gender| NO| | | | |
No| Category| Type| Support| Data| Remark
---|---|---|---|---|---
13| Input Voltage| | | AC 100-240Vac~ 50/60Hz|
14| Power Rating| Adapter| YES| 19V 5A|
PSU| NO| |
No| Category| Item| Data**| *Remark
---|---|---|---|---
15| Reliability| MTBF| 30,000 HRS with 90% confidence level|
Using Altitude| 10,000 feet(3,048m) for Reliability 40,000 feet(12,192m) for
Storage / Shipment|
Environment Condition| Operating| Temperature : 0°C ~ 40°C
Humidity : Less than 80%|
Storage| Temperature : -20°C ~ 60°C Humidity : Less than 85%|
Signal Timing
↓↓↓ Place the cursor on the lower column (B4) and paste
1) HDMI
No.| Resolution| Horizontal Freqency(kHz)| Vertical
Frequency(Hz)| polarity(H/V)| Remark| section| Dot Clock
[MHz]| Total Period(E)| Display (A)| Front Porch(D)| Sync.
(C)| Back Porch(B)
---|---|---|---|---|---|---|---|---|---|---|---|---
1| 640 x 480| 31.469| 59.940| -/-| | H(Pixels)| 25.175| 800| 640| 16| 96| 48
V(Lines)| 525| 480| 10| 2| 33
2| 800 x 600| 37.879| 60.317| +/+| | H(Pixels)| 40.000| 1056| 800| 40| 128| 88
V(Lines)| 628| 600| 1| 4| 23
3| 1024 x 768| 48.363| 60.004| -/-| | H(Pixels)| 65.000| 1344| 1024| 24| 136|
160
V(Lines)| 806| 768| 3| 6| 29
4| 1280 x 720| 45.000| 60.000| +/+| | H(Pixels)| 64.000| 1440| 1280| 48| 32|
80
V(Lines)| 741| 720| 3| 5| 13
5| 1280 x 1024| 79.976| 75.025| +/+| | H(Pixels)| 135.000| 1688| 1280| 16|
144| 248
V(Lines)| 1066| 1024| 1| 3| 38
6| 1920 x 1080| 67.500| 60.000| +/+| | H(Pixels)| 148.500| 2200| 1920| 88| 44|
148
V(Lines)| 1125| 1080| 4| 5| 36
7| 1920 x 1080| 66.587| 59.934| +/-| | H(Pixels)| 138.500| 2080| 1920| 48| 32|
80
V(Lines)| 1111| 1080| 3| 5| 23
8| 3840 x 2160| 65.688| 29.981| +/-| Recommended Timing – Input Compatibility
Version : 1.4| H(Pixels)| 262.750| 4000| 3840| 48| 32| 80
V(Lines)| 2191| 2160| 3| 5| 23
9| 1920 x 1080| 166.668| 144.052| +/-| | H(Pixels)| 346.670| 2080| 1920| 8|
32| 120
V(Lines)| 1157| 1080| 63| 8| 6
10| 2560 x 1440| 182.996| 119.998| +/-| | H(Pixels)| 497.750| 2720| 2560| 48|
32| 80
V(Lines)| 1525| 1440| 3| 5| 77
11| 3840 x 2160| 133.313| 59.997| +/-| Recommend Timing – Input Compatibility
Version : 2.1 (AV)| H(Pixels)| 533.250| 4000| 3840| 48| 32| 80
V(Lines)| 2222| 2160| 3| 5| 54
12| 2560 x 1440| 222.268| 144.050| +/-| | H(Pixels)| 604.570| 2720| 2560| 8|
32| 120
V(Lines)| 1543| 1440| 89| 8| 6
13| 3840 x 2160| 333.333| 144.050| +/-| Recommend Timing – Input Compatibility
Version : 2.1 (PC)| H(Pixels)| 1333.330| 4000| 3840| 8| 32| 120
V(Lines)| 2314| 2160| 140| 8| 6
2) DP
No.| Resolution| Horizontal Freqency(kHz)| Vertical Frequency(Hz)| polarity(H/V)| Remark| section| Dot Clock [MHz]| Total Period(E)| Display (A)| Front
Porch(D)
| Sync. (C)| Back Porch(B)
---|---|---|---|---|---|---|---|---|---|---|---|---
1| 640 x 480| 31.469| 59.940| -/-| | H(Pixels)| 25.175| 800| 640| 16| 96| 48
V(Lines)| 525| 480| 10| 2| 33
2| 800 x 600| 37.879| 60.317| +/+| | H(Pixels)| 40.000| 1056| 800| 40| 128| 88
V(Lines)| 628| 600| 1| 4| 23
3| 1024 x 768| 48.363| 60.004| -/-| | H(Pixels)| 65.000| 1344| 1024| 24| 136|
160
V(Lines)| 806| 768| 3| 6| 29
4| 1280 x 720| 45.000| 60.000| +/+| | H(Pixels)| 64.000| 1440| 1280| 48| 32|
80
V(Lines)| 741| 720| 3| 5| 13
5| 1280 x 1024| 79.976| 75.025| +/+| | H(Pixels)| 135.000| 1688| 1280| 16|
144| 248
V(Lines)| 1066| 1024| 1| 3| 38
6| 1920 x 1080| 67.500| 60.000| +/+| | H(Pixels)| 148.500| 2200| 1920| 88| 44|
148
V(Lines)| 1125| 1080| 4| 5| 36
7| 1920 x 1080| 166.587| 143.981| +/-| | H(Pixels)| 346.500| 2080| 1920| 48|
32| 80
V(Lines)| 1157| 1080| 3| 5| 69
8| 3840 x 2160| 133.313| 59.997| +/-| Recommended Timing – Input Compatibility
Version : 1.2| H(Pixels)| 533.250| 4000| 3840| 48| 32| 80
V(Lines)| 2222| 2160| 3| 5| 54
9| 2560 x 1440| 222.151| 143.973| +/-| | H(Pixels)| 604.250| 2720| 2560| 48|
32| 80
V(Lines)| 1543| 1440| 3| 5| 95
10| 3840 x 2160| 214.680| 95.033| +/-| | H(Pixels)| 858.720| 4000| 3840| 8|
32| 120
V(Lines)| 2259| 2160| 85| 8| 6
11| 3840 x 2160| 268.438| 119.999| +/-| Recommended Timing
– Input Compatibility Version : 1.4| H(Pixels)| 1073.750| 4000| 3840| 8| 32|
120
V(Lines)| 2237| 2160| 3| 5| 69
12| 3840 x 2160| 333.333| 144.050| +/-| Recommended Timing
– Input Compatibility Version : 1.4(DSC)| H(Pixels)| 1333.330| 4000| 3840| 8|
32| 120
V(Lines)| 2314| 2160| 140| 8| 6
3) HDMI Video input (for Manual)
No.| Factory support mode (Preset Mode)| Horizontal
Freqency(kHz)| Vertical Frequency(Hz)| VIC| Remark
---|---|---|---|---|---
1| 480P| 31.5| 60| 0x01|
2| 720P| 45| 60| 0x04|
3| 1080P| 67.5| 60| 0x10|
4| 1080P| 135| 120| 0x3F|
5| 2160P| 135| 60| 0x61|
6| 2160P| 255| 120| 0x76|
SAFETY PRECAUTIONS
IMPORTANT SAFETY NOTICE
Many electrical and mechanical parts in this chassis have special safety-
related characteristics. These parts are identified by in the Exploded View.
It is essential that these special safety parts should be replaced with the
same components as recommended in this manual to prevent Shock, Fire, or other
Hazards.
Do not modify the original design without permission of manufacturer.
General Guidance
An isolation Transformer should always be used during the servicing of a
receiver whose chassis is not isolated from the AC power line. Use a
transformer of adequate power rating as this protects the technician from
accidents resulting in personal injury from electrical shocks.
It will also protect the receiver and it’s components from being damaged by
accidental shorts of the circuitry that may be inadvertently introduced during
the service operation.
If any fuse (or Fusible Resistor) in this TV receiver is blown, replace it
with the specified.
When replacing a high wattage resistor (Oxide Metal Film Resistor, over 1 W),
keep the resistor 10 mm away from PCB.
Keep wires away from high voltage or high temperature parts.
Before returning the receiver to the customer, always perform an AC leakage
current check on the exposed metallic parts of the cabinet, such as antennas,
terminals, etc., to be sure the set is safe to operate without damage of
electrical shock.
Leakage Current Cold Check(Antenna Cold Check)
With the instrument AC plug removed from AC source, connect an electrical
jumper across the two AC plug prongs. Place the AC switch in the on position,
connect one lead of ohm-meter to the AC plug prongs tied together and touch
other ohm-meter lead in turn to each exposed metallic parts such as antenna
terminals, phone jacks, etc.
If the exposed metallic part has a return path to the chassis, the measured
resistance should be between 1 MΩ and 5.2 MΩ.
When the exposed metal has no return path to the chassis the reading must be
infinite.
An other abnormality exists that must be corrected before the receiver is
returned to the customer.
Leakage Current Hot Check (See below Figure)
Plug the AC cord directly into the AC outlet.
Do not use a line Isolation Transformer during this check.
Connect 1.5 K / 10 watt resistor in parallel with a 0.15 uF capacitor between
a known good earth ground (Water Pipe, Conduit, etc.) and the exposed metallic
parts.
Measure the AC voltage across the resistor using AC voltmeter with 1000
ohms/volt or more sensitivity.
Reverse plug the AC cord into the AC outlet and repeat AC voltage measurements
for each exposed metallic part. Any voltage measured must not exceed 0.75 volt
RMS which is corresponds to 0.5 mA.
In case any measurement is out of the limits specified, there is possibility
of shock hazard and the set must be checked and repaired before it is returned
to the customer.
Leakage Current Hot Check circuit
When 25A is impressed between Earth and 2nd Ground for 1 second, Resistance must be less than 0.1 *Base on Adjustment standard
Block Diagram – 27GR93U/32GR93U
EXPLODED VIEW
IMPORTANT SAFETY NOTICE
Many electrical and mechanical parts in this chassis have special safety-
related characteristics. These parts are identified by in the EXPLODED VIEW.
It is essential that these special safety parts should be replaced with the
same components as recommended in this manual to prevent Shock, Fire, or other
Hazards.
Do not modify the original design without permission of manufacturer.
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