42PQ301R-ZB (CHASSIS:PP91B) — LG TV Service Manual (repair manual). Page 8

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1. Application Range
This spec sheet is applied to all of the PP91A/B chassis. 
2. Specification
(1) Because this is not a hot chassis, it is not necessary to use
an  isolation  transformer.  However,  the  use  of  isolation
transformer will help protect test instrument.
(2) Adjustment must be done in the correct order.
(3) The adjustment must be performed in the circumstance of
25±5°C  of  temperature  and  65±10%  of  relative  humidity  if
there is no specific designation.
(4)  The  input  voltage  of  the  receiver  must  keep  100~240V,
(5) The receiver must be operated for about 5 minutes prior to
the adjustment when module is in the circumstance of over
- In case of keeping module is in the circumstance of 0°C,
it should be placed in the circumstance of above 15°C for
2 hours
- In case of keeping module is in the circumstance of below
-20°C,  it  should  be  placed  in  the  circumstance  of  above
15°C for 3 hours,.
3. S/W Program Download
3-1. Profile
This  is  for  downloading  the  s/w  to  the  flash  memory  of  the
3-2. Equipment 
(1) PC
(2) ISP_tool program
(3) Download jig
3-3. Connection Structure
3-4. Connection Condition
(1) IC name and circuit number : Flash Memory and IC603
(2) Use voltage : 3.3V (5 pin)
(3) SCL : 15 pin
(4) SDA : 12 pin
(5) Tact time : about 2min and 30seconds
3-5. Download Method (By using MSTAR JIG)
(1) Preliminary Steps
1) Connect the download jig to D-sub jack
2) Connect the PC to USB jack
(2) Download Steps
1) Execute ‘ISP Tool’ program in PC, then a main window will
be opened
Double click
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