CD-DP2400E (serv.man9). Explanation of Dolby surround and test mode - Sharp Audio Service Manual (repair manual)

cd-dp2400e (serv.man9) service manual
Model
CD-DP2400E (serv.man9)
Pages
2 Few pages! See other manuals at the bottom of the first or last page.
Size
16.46 KB
Type
PDF
Document
Service Manual
Brand
Device
Audio / System / Explanation of Dolby surround and test mode
File
cd-dp2400e-sm9.pdf
Date

Read Sharp CD-DP2400E (serv.man9) Service Manual online

CD-DP2400E
– 12 –
SP out
L-ch
Input signal is output.
(SO901)
R-ch
Input signal is output.
(SO901) SP out C-ch
SP cut, no output
(SO901) SP out S-ch
Almost no output (only omitting component)
SP out
L-ch
Almost no output (only omitting component)
(SO901)
R-ch
Almost no output (only omitting component)
(SO901) SP out C-ch Input signal is output.
(SO901) SP out S-ch
Almost no output (only omitting component)
               State of set Dolby Pro Logic
Dolby Pro Logic On mode
Output point
                  Bypass mode
Normal mode
Phantom mode
IC501
1 pin L-out
Output enabled state
Output enabled state
Output enabled state
2 pin R-out
Output enabled state
Output enabled state
Output enabled state
IC501
 3pin C-out
No output
Output enabled state
No output
IC501
9pin  S-out
No output
Output enabled state
Output enabled state
SP OUT
L-ch
Output enabled state
Output enabled state
Output enabled state
(SO901)
R-ch
Output enabled state
Output enabled state
Output enabled state
 SP OUT C-ch
No output in MUTE (Q501) state
Output enabled state
No output in MUTE (Q501) state
(SO901)
SP OUT S-ch
No output in MUTE (Q502) state
Output enabled state
Output enabled state
(SO901)
EXPLANATION OF DOLBY SURROUND PRO LOGIC AND EVALUATION METHOD
Test tone output
• Pro Logic ON Normal mode
   Press the remote control TEST TONE button.
      
 →
Output of only L-ch
 →
Output of only C-ch
   
 ↑
                                                                    ↓
          Output of only S-ch 
 Output of only R-ch
   The test tone (noise) is repeatedly output for output period
   (2 sec).
   In this case the following indication appears repeatedly.
      
 →
TEST
 →
L-ch
 →
C-ch
                
  ↑
                ↓
            
S-ch
 ←
 R-ch
• Pro Logic ON Phantom mode
   Press the remote control TEST TONE button.
      
 →
Output of only L-ch
 →
Output of only R-ch
                
                    ↑
                                    ↓
                                        
 Output of only S-ch
   The test tone (noise) is repeatedly output for output period
   (2 sec).
   In this case the following indication appears repeatedly.
    
TEST 
→ 
L-ch 
→ 
R-ch
                      
 
           
                       
 S-ch
Outline
• Namely, two speakers are connected in parallel to one
amplifier.
• In the Pro Logic BYPASS mode the amplifier for C-ch (center
channel) and the amplifier for S-ch (surround channel) are in
MUTE state. The SP output is cut.
• In the normal mode of Pro Logic ON mode the amplifiers for
C-ch and S-ch are in operative state, so that the SP output
appears.
• In the Phantom mode of Pro Logic ON mode the amplifier for
C-ch is in MUTE state, so that the SP output is cut. The
amplifier for S-ch (surround) is in operative state, so that the
SP output appears
     
State of element output and terminal output in specific mode
Relation between VIDEO IN input and output in Pro Logic
ON state
(1) L-ch/R-ch same phase input into VIDEO IN input jack in
VIDEO Function mode
Output point
Normal mode
Output point
Phantom mode
(2) L-ch/R-ch reverse phase input into VIDEO IN input jack in
VIDEO Function mode
(Reverse phase: Phase difference between L and R is 180
°
)
Output point
Normal mode
SP out
L-ch
Almost no output (only omitting component)
(SO901)
R-ch
Almost no output (only omitting component)
(SO901) SP out C-ch
Almost no output (only omitting component)
(SO901) SP out S-ch
Input signal is output.
Output point
Phantom mode
SP out
L-ch
Almost no output (only omitting component)
(SO901)
R-ch
Almost no output (only omitting component)
(SO901) SP out C-ch
SP cut, no output
(SO901) SP out S-ch
Input signal is output.
• Accordingly, if you want to output signal waveform to C-ch SP
out, give the same phase input into L-ch/R-ch INPUT in the
Pro Logic Normal mode.
   If one of channels receives input, C-ch does not output.  Only
L-ch or R-ch outputs.
• If you want to output signal waveform to S-ch SP out, you can
use either Normal mode or Phantom mode.  However, 180
°
reverse phase input must be given to L-ch/R-ch INPUT.
– 13 –
CD-DP2400E
TEST MODE
KEY
TEST MODE
CONTENTS
[ON/STAND-BY] [TUNER] + [X-BASS]
TEST 1
TUNER PRESET MEMORY CLEAR
[ON/STAND-BY] [MEMORY/SET] + [X-BASS]
TEST 2
TUNER PRESET FOR PRODUCTION
[ON/STAND-BY] [>>] + [X-BASS]
TEST 3
KEY AND DISPLAY TEST
[ON/STAND-BY] [CD] + [X-BASS]
TEST 4
CD TEST MODE
[ON/STAND-BY] [TAPE] + [X-BASS]
TEST 5
TAPE TEST MODE
[ON/STAND-BY] [>] + [X-BASS]
TEST 6
ALL CLEAR(RESET)
[ON/STAND-BY] [TUN UP] + [X-BASS]
TEST 7
AUDIO TEST
[ON/STAND-BY] [TUN DOWN] + [X-BASS]
TEST 8
PRODUCTION INITIALIZE FOR CHANGER
During POWER OFF mode,push below each 2 keys [ON/STAND-BY] key.
Then go to each TEST MODE.
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