62
12. Audio Block
Normal Signal Levels
Refer to chart 12-3 for the audio signal levels throughout the audio chain. The audio signal is taken from a B&K
1064 NTSC pattern generator with 1kHz audio modulation input to the sub tuner’s channel 3. The DTV audio
level is the average volume sampled from four DTV stations.
Chart 12-3 - Audio Signal Levels
Test Location
Signal
Left
Right
Level *
DTV Output
CN7402/pin A2 (QM
board)
CN7402/pin A3
0.4Vp-p (average)
Analog Tuner
Main or Sub Tuner pins
(A board)
Main or Sub Tuner pins
(A board)
1.4Vp-p (1kHz)
B Board Output
CN4401/pin 8 (S board)
CN4401/pin 9 (S board)
1.4Vp-p w 5Vdc
Mid & Tweeter out to Amp
**
CN4401/pin 1 (S board)
CN4401/pin 2 (S board)
0.1Vp-p at half volume **
0.6Vp-p = Max volume
Low freq Output to Amp
CN4401/pin 3 (S board)
CN4401/pin 4 (S board)
0.018Vp-p = half volume,
0.03Vp-p = Max volume
Variable / Fixed Output *** CN4401/pin 11 (S board) CN4401/pin 12 (S board)
0.22Vp-p = half volume,
2.0Vp-p = Max volume
1.5Vp-p = Fixed output
* All effects are turned OFF from the menu.
** Output level at half volume changes to 90mVp-p in Simulated Mode or 120mVp-p in TruSurround Mode.
*** Main Micro IC001 Mute control line “A Mute” at CN001/pin A1 either selects speakers (HIGH) or the rear panel
variable / fixed audio output (LOW).
Summary of Contents for KD-34XBR2 - 34" Hdtv Fd Trinitron Wega
Page 77: ...74 RA 5A Chassis Board Layout ...
Page 108: ...APPENDIX ...
