Philips LX9000R Service Manual page 217

Abbreviations and acronyms
Name Direction
7206 →
- 12V_A
7208 →
- 5V
7205 →
- 5V_STBY
7211 → Power Amplifier board
- A
7202 →
+12V_A
7212 → Key board left (via ASP- and Control board)
+12V_AM
7212 → AV board
+12V_M
7222 → 3260
+12V_OCD
7200 →
+12V_STBY
6211 → 7204
+20V_IN
7204 →
+3V3
6217 →
+4V4
7213 →
+5V
7203 →
+5V_A
7201 →
+5V_STBY
7521 (ASP board) → 7500, 7604, 7654 (ASP board)
+9V2
7281 → AV board (via Power second.- and ASP board)
+33V_STBY
7210 → Power amplifier board
+A
3640 (ASP board) → 7600, 7650 (ASP board)
+C_OPAMP
3211 → 7210
+FET
3555 (ASP board) → 7502 (ASP board)
+HP
7520 (ASP board) → Audio Tuner
9V_TUNER
Front µP → ASP board 7500
AF_I2C_SCL1
Front µP → ASP board 7654
AF_I2C_SCL2
Front µP → ASP board 7604
AF_I2C_SCL3
AF_I2C_SDA Front µP ´ ASP board 7500, 7604, 7654
Front µP → Auxiliary board (via ASP board)
AF_MUX1
Front µP → Auxiliary board (via ASP board)
AF_MUX2
ASP board 2667 → 1302 (Power Amplifier board)
AMP_CENTRE
AMP_LEFT/RIGHT ASP board 3567/3577 → 1302 (Power Amplifier board)
ASP board 2627 (2647) → 1303 (Power Amplifier board)
AMP_SL (SR)
ASP board 2687 → 1303 (Power Amplifier board)
AMP_SUB
3505 (Front/Control) → Display
BL_DISP
Front µP → 3438
BL_DISPLAY_HI
BL_DISPLAY_LO Front µP → 3437
3402 (Front/Control) → 6404 (Key board left via Key board right)
BL_ROT_S
Front µP → 3407
BL_ROT_S_HI
Front µP → 3408
BL_ROT_S_LO
3411 (Front/Control) → 6402 (Key board right)
BL_ROT_V
Front µP → 3403
BL_ROT_V_HI
Front µP → 3412
BL_ROT_V_LO
ASP board junction 3641/3642 → 3665, 3685 (ASP board)
C_REF
CECO -
Front µP → CECO
CECO_RST
CLK -
Front µP → Display and EEPROM 7408
DI_I2C_SDA
Front µP → Display and EEPROM 7408
DI_I2C_CLK
DOWNMIX_L (R) MDM board 1803 → 1603 (ASP board)
DVD_FAN_CTRL junction 3515/3517/3518 (Front/Control) → 7610 (DVD Fan Control on Control line, sum of DvdFan1+DvdFan2, controls speed of the fan
ASP board)
Front µP → 3517
DvdFan1
Front µP → 3518
DvdFan2
7710 → 1302 (Power Amplifier board) → ASP board
ERR
Front µP → 2606__Clock generator on Power Amplifier board)
FREQU_HOP
GND -
Circuit-, IC descriptions and list of abbreviations
set related
LX9000R
Description
- 12V supply derived from - A supply
- 5V supply switched by +12V_M supply
- 5V supply also available in Standby mode
Negative power supply for power amplifiers
+12V supply
+12V supply for set fan, display motor and backlight of rotary encoders
Switched +12V supply, switched by INV_ON from CECO
Control line, Overcurrent protection for +12V_A, activates
power off via Overvoltage protection and NTC_trafo line
+12V supply also available in Standby mode
Supply for 7204 (SMPS IC) which delivers +3V3 with
high current capability
+3,3V supply created by a Switched Mode Power Supply IC
to enable high output current
+4,4V supply derived from +5V supply
+5V supply switched by +12V_M supply
+5V supply
+5V supply also available in Standby mode
Supply voltage for sound processor ICs
+33V supply also available in Standby mode
Positive power supply for power amplifiers
Supply voltage for buffer amplifier ICs 7600 and 7650
Bias voltage for FET 7210
Supply voltage for buffer amplifier IC7502
+9V supply for Audio Tuner
I2C bus Serial Clock to sound processor IC 7500
I2C bus Serial Clock to sound processor IC 7654
I2C bus Serial Clock to sound processor IC 7604
I2C bus Serial Data to sound processor ICs
Control line for Source Selector IC 7901 (multiplexer)
Control line for Source Selector IC 7901 (multiplexer)
Signal line, AF signal for center loudspeaker (amplifier)
Signal line, left/right AF signal for front loudspeaker (amplifier)
Signal line, left/right AF signal for surround loudspeaker (amplifier)
Signal line, AF signal for sub-woofer (amplifier)
Connection line, switches backlight of the display
Control line, switches Display backlight bright
Control line, switches Display backlight to low intensity
Connection line, switches backlight rotary encoder "Source".
Control line, switches backlight rotary encoder "Source" bright
Control line, switches backlight rotary encoder "Source" to
low intensity
Connection line, switches backlight rotary encoder "Volume".
Control line, switches backlight rotary encoder "Volume" bright
Control line, switches backlight rotary encoder "Volume" to
low intensity
Reference voltage for buffer amplifier IC 7650
CEntral COntroller
Control line, resets the CECO after startup to enable simulation
of key combinations for service tests. Low level=reset
7416 serves as inverter.
Clock
I2C bus Serial Data, communication to display driver and EEPROM 7408
I2C bus Serial Clock, communication to display driver and
EEPROM 7408
Signal line, digital multi-channel signal converted to stereo Left/Right
for the Basic Engine. Prepared for AV3 DVD module only.
Control line, forms with DvdFan2 summary signal DVD_FAN_CTRL
Control line, forms with DvdFan1 summary signal DVD_FAN_CTRL
Control line, error signal for detection of DC on one of the amplifier
outputs. Low level=error. On ASP board short circuited with "TEMP"
to the combined control line "NTC_Amp".
Control line, shifts the "tact frequency" of the power amp. to avoid
radio interferences during AM reception. High level=on
7412 serves as impedance converter.
Ground connection. Added letters indicate different common GND
9. EN 217