Videocon MS901K-AP, Service Manual, Page: 13 / 43

Factory Test & Alignment Specification For MS801-AP Series (V1.0)
Page 4 of 17

All voltages have to be measured with respect to ground, unless otherwise stated

All final tests have to be done on a complete set including LCD panel in a room with temperature of
25+/-7°C

The Picture Performance assessment such as White Balance (luminance and colour temperature)
has to be performed into subdued lighted room after at least 60min of warm-up in order to avoid any
temperature drift influence ( colorimetry vs time).
1. PCB/SKD Assembly: Test & Alignment
1.1.
Pre-Conditions and DC/DC Check
Before power-on, please check the board according to the relevant block diagram and circuit
diagram, and make sure that no serious issue or mistake can destroy the board. For example, the
output of DC-DC and LDO should not be shorted to ground.
Supply a suited voltage and power-on, then check the voltage according to the relevant block
diagram, circuit diagram and voltage spec, the error should be less than 5%. For example, the
voltage for main chip(+3V3, +2.5V, VDDC1V15, 1V5_DDR, etc.), the voltage for TUNER(TU_3V3),
the voltage for amplifier (AMP_VCC), etc...
Unit Position Value Remark
Power board
input P001 (3.3V STB voltage) 3.3V
±
5% 3V3 STB
P001 (24V Main power voltage) 24V
±
5% 24V/12V
SOC U005 (For USB and other 5V) 5V
±
5%
5V
U003 (For 3.3V Normal) 3.3V
±
5% 3V3
U002 (For SOC U400 and other 2.5V ) 2.5V
±
5% 2V8
U004 (For DDR3) 1.5V
±
5% 1V5_DDR
U008 (For Core) 1.15V
±
5% VDDC1V15
U101 (For Tuner) 3.3V
±
5% TU_3V3
6M40SOC U1106 (For 6M40)
5V
±
5%
6M40_5V
U1102 (For 6M40) 3.3V
±
5%
6M40_3V3
U1103 (For 6M40) 2.5V
±
5% 6M40_2V5
U1102 (For 6M40 DDR3 and other 1.5V) 1.5V
±
5% DDR_1V5
U1106 (For 6M40 Core) 1.15V
±
5% VCORE
USB HUBSOC U1003 (For U1001USB HUB) 3.3V
±
5% USB_HUB_3V3
HDMI switch
soc U405 (For U403 SII9687) 3.3V
±
5% 3V3 SII
U404 (For U403 SII9687) 1V
±
5%
1V2
1.2.
Software upgrades
See Appendix

“How to upgrade Mboot”
See Appendix

“How to upgrade FLASH SW”
1.3. Project ID Modification
There are different IDs stored into the NVM depending on different Panels settings and Models
features, but there’s only one key br
anching Project ID that includes all.
So, it’s not recommended to
modify Panel ID with Hyper terminal as other ID features may not change!