LG CJ98 Referenzhandbuch
[Others][Apply the modified main board to improve Disk Open / Close malfunction.
(Measure and replace the main board)]
Service Bulletin
Applicable for Serial Number : ALL Serial
1. Repair Instruction
For repairing this issue, we need to change Main Board after checking resistor value.
1) Measurement and replacement of main board is applied to the use of long-term inventory and to all boards to be
received
from the field in the future
2) If issue is happened, Change from issue Main Board to improved Main Board after checking the resister value because it
has
no Part Number changing.
(Improved Main Board information : The Board that is produced after ‘19.3.27 / ‘19.3.29 / ‘19.4.8)
The Board after ‘19.3.27 : CJ98, CJ88, CJ87
The Board after ’19.3.29 : CJ45, CJ44, CJ65, CK57, CK56, CK43, CK99
The Board after ‘19.4.8 : OJ98, OK99, OM4560, OK45, OK55, OK75
※ Please refer
to next page for each model’s service method
Page 1
Applicable for models MINI / Onebody
- MINI *(CJ98,CJ88,CJ87,CJ65,CJ45,CJ44,CK99,CK57,CK56,CK43)
-Onebody *(OJ98, OK99, OM4560, OK45, OK55, OK75)
Bulletin Type : SVC Notice Parts Others Applicable only with symptoms with every
repair
Symptoms Disc Tray does not work when we push Disc
open or Disc close button
Picture
Cause Open or Close signal of the models that use
MCS DSP IC is affected to each set impedance
Product : Mini / Onebody / Louder
Bulletin # : PNZ201900013-01
Release Date : 2019.08.22
Service Bulletin
Page 2
Product : Mini / Onebody / Louder
Bulletin # : PNZ201900013-01
Release Date : 2019.08.22
* The picture that we check resistance value with multi meter
Measurement value of resistor for each model
- If it is about 4.7KΩ, Change Main Board.
Measurement value of resistor for each model
-If it is about 470Ω, we don’t need to change
Main Board.
4.669kΩ ≒ About 4.7kΩ
0.4668kΩ ≒ About 470Ω
1. Model : CJ98,CJ88,CJ87
Main PCB : EAX67173201 Only
관련 ECO NO : EKNJ300150
Change Details : R505, R506 : 0RJ4701C678(4.7KΩ, 1005, 5%, 1/16W) → 0RJ4700C678(470Ω, 1005, 5%, 1/16W)
* It should support only the model that produced before 2019.3.27
Page 3
EAX67173201 Main PCB (The Upper Surface)
Check the chip resister value
with Multi tester
After checking R505 or R506 resister value
-If it is about 4.7KΩ, Change Main board
-If it is about 470Ω,
We don’t need to change Main board
Service Bulletin Product : Mini / Onebody / Louder
Bulletin # : PNZ201900013-01
Release Date : 2019.08.22
2. Model : CJ45,CJ44
Main PCB : ~ EAX67136103
ECO NO : EKNJ300169
Change Details : R500, R502 : 0RJ4701C678(4.7KΩ, 1005, 5%, 1/16W) → 0RJ4700C678(470Ω, 1005, 5%, 1/16W)
* It should support only the model that produced before 2019.3.29
Page 4
EAX Main PCB (The bottom surface)
Check the chip resister value
with Multi tester
Service Bulletin Product : Mini / Onebody / Louder
Bulletin # : PNZ201900013-01
Release Date : 2019.08.22
After checking R500 or R502 resister value
-If it is about 4.7KΩ, Change Main board
-If it is about 470Ω,
We don’t need to change Main board
3. Model : CJ65
Main PCB : ~ EAX67154403
ECO NO : EKNJ300169
Change Details : R500, R502 : 0RJ4701C678(4.7KΩ, 1005, 5%, 1/16W) → 0RJ4700C678(470Ω, 1005, 5%, 1/16W)
* It should support only the model that produced before 2019.3.29
Page 5
EAX Main PCB (The bottom surface)
Check the chip resister value
with Multi tester
Service Bulletin Product : Mini / Onebody / Louder
Bulletin # : PNZ201900013-01
Release Date : 2019.08.22
After checking R500 or R502 resister value
-If it is about 4.7KΩ, Change Main board
-If it is about 470Ω,
We don’t need to change Main board
4. Model : CK57,CK56
Main PCB : ~ EAX67862202
ECO NO : EKNJ300169
Change Details : R500, R502 : 0RJ4701C678(4.7KΩ, 1005, 5%, 1/16W) → 0RJ4700C678(470Ω, 1005, 5%, 1/16W)
* It should support only the model that produced before 2019.3.29
Page 6
EAX Main PCB (The bottom surface)
Check the chip resister value
with Multi tester
Service Bulletin Product : Mini / Onebody / Louder
Bulletin # : PNZ201900013-01
Release Date : 2019.08.22
After checking R500 or R502 resister value
-If it is about 4.7KΩ, Change Main board
-If it is about 470Ω,
We don’t need to change Main board
5. Model : CK43
Main PCB : ~ EAX67920102
ECO NO : EKNJ300169
Change Details : R500, R502 : 0RJ4701C678(4.7KΩ, 1005, 5%, 1/16W) → 0RJ4700C678(470Ω, 1005, 5%, 1/16W)
* It should support only the model that produced before 2019.3.29
Page 7
EAX Main PCB (The bottom surface)
Check the chip resister value
with Multi tester
Service Bulletin Product : Mini / Onebody / Louder
Bulletin # : PNZ201900013-01
Release Date : 2019.08.22
After checking R500 or R502 resister value
-If it is about 4.7KΩ, Change Main board
-If it is about 470Ω,
We don’t need to change Main board
6. Model : CK99
Main PCB : EAX67876301
ECO NO : EKNJ300169
Change Details : R523, R524 : 0RJ4701C678(4.7KΩ, 1005, 5%, 1/16W) → 0RJ4700C678(470Ω, 1005, 5%, 1/16W)
* It should support only the model that produced before 2019.3.29
Page 8
EAX Main PCB (The upper surface)
Check the chip resister value
with Multi tester
Service Bulletin Product : Mini / Onebody / Louder
Bulletin # : PNZ201900013-01
Release Date : 2019.08.22
After checking R523 or R524 resister value
-If it is about 4.7KΩ, Change Main board
-If it is about 470Ω,
We don’t need to change Main board
7. Model : OJ98
Main PCB : EAX67206701
ECO NO : EKNJ400042
Change Details : R5B3, R5A8 : 0RJ4701C678(4.7KΩ, 1005, 5%, 1/16W) → 0RJ4700C678(470Ω, 1005, 5%, 1/16W)
* It should support only the model that produced before 2019.4.8
Page 9
EAX67206701 Main PCB (The Bottom surface)
Check the chip resister value
with Multi tester
After checking R5B3 or R5A8 resister value
-If it is about 4.7KΩ, Change Main board
-If it is about 470Ω,
We don’t need to change Main board
Service Bulletin Product : Mini / Onebody / Louder
Bulletin # : PNZ201900013-01
Release Date : 2019.08.22
8. Model : OK99
Main PCB : EAX67882701
ECO NO : EKNJ400042
Change Details : R5B3, R5A8 : 0RJ4701C678(4.7KΩ, 1005, 5%, 1/16W) → 0RJ4700C678(470Ω, 1005, 5%, 1/16W)
* It should support only the model that produced before 2019.4.8
Page 10
EAX67882701 Main PCB (The Bottom surface)
Check the chip resister value
with Multi tester
After checking R5B3 or R5A8 resister value
-If it is about 4.7KΩ, Change Main board
-If it is about 470Ω,
We don’t need to change Main board
Service Bulletin Product : Mini / Onebody / Louder
Bulletin # : PNZ201900013-01
Release Date : 2019.08.22
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