Sharp CD-DP900 (serv.man27) Service Manual ▷ View online
– 17 –
CD-DP900H/E
Figure 17-2
CD ERROR CODE DESCRIPTION
Error
Explanation
01
When Pickup set inner position, inner switch
cannot detect 'ON' level for 10 secs.
cannot detect 'ON' level for 10 secs.
When tray moves to Open/Close, Open/Close switch
10*
cannot detect 'ON' level for 7 secs.
When disc table rotate to target position.
Clamp switch cannot detect 'ON' level for 7 secs.
When disc table rotate to target position.
Clamp switch cannot detect 'ON' level for 7 secs.
When disc table set to Disc1 position for 1 st time,
11*
"CLAMP SW", "DISC NO SW" and "OPEN/CLOSE"
cannot detect 'ON' level for 14 secs.
cannot detect 'ON' level for 14 secs.
31
When it changes to CD function, DSP cannot read
initial data.
initial data.
T
T
EFBL
FDO
TE
Stopped
CH1=500 mV
DC 10:1
CH2=200 mV
DC 10:1
CH3=1 V
DC 10:1
500 ms/div
(500 ms/div)
NORM:20 kS/s
1
2
3
=Record Length=
Smoothing : ON
CH1 : 0.000 V
CH2 : 0.000 V
CH2 : 0.000 V
Main : 100K
Zoom : 2k
Zoom : 2k
Mode : SINGLE
Type : EDGE CH1
Delay : 0.0 ns
Hold off : 0.2
Type : EDGE CH1
Delay : 0.0 ns
Hold off : 0.2
µ
s
CH3 : 0.00 V
CH4 : 0.00 V
CH4 : 0.00 V
BW : FULL
=Trigger=
=Filter=
=Offset=
CH2
v/DIV
200 mV
v/DIV
200 mV
1999/04/05 20:26:47
Test Stage
Frequency
Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
CD SECTION
•••••
AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
*1. Input: Antenna
Output: TP302
*2. Input: Antenna
Output: TP301
TUNER SECTION
fL: Low-range frequency
fH: High-range frequency
fH: High-range frequency
AM IF
450 kHz
1,702 kHz
T351
*1
AM Band
—
530 kHz
(fL): T306
*2
Coverage
1.1
±
0.1 V
AM Tracking 990 kHz
990 kHz
(fL): T303
*1
Figure 17-1 ADJUSTMENT POINTS
Items adjusted automatically
(1) Offset adjustment (The offset voltage between the head
amplifier output and the VREF reference voltage is
compensated inside the IC.)
compensated inside the IC.)
* Focus offset adjustment
* Tracking offset adjustment
* Tracking offset adjustment
(2) Tracking balance adjustment (waveform drawing
Fig.17-2 EFBL)
(3) Gain adjustment (The gain is compensated inside the IC
so that the loop gain at the gain crossover frequency will
be 0 dB.)
be 0 dB.)
* Focus gain adjustment
* Tracking gain adjustment
* Tracking gain adjustment
• Adjustment
Since this CD system incorporates the following automatic
adjustment functions, readjustment is not needed when
replacing the pickup. Therefore, different PWBs and pickups
can be combined freely.
Each time a disc is changed, these adjustments are
performed automatically. Therefore, playback of each disc
can be performed under optimum conditions.
adjustment functions, readjustment is not needed when
replacing the pickup. Therefore, different PWBs and pickups
can be combined freely.
Each time a disc is changed, these adjustments are
performed automatically. Therefore, playback of each disc
can be performed under optimum conditions.
T303
CF301
T351
CF352
CF351
CF302
R357
IC303
T306
IC302
FE301
CNP301
SO301
FM75 ohms
FM75 ohms
AM LOOP
ANTENNA
ANTENNA
MAIN PWB
AM Tracking
AM Band Coverage
AM IF
TP301
TP302
* 'CHECKING'
If Error is detected, 'CHECKING' will be display instead of 'ER-
CD**' display. 'ER-CD**' display will only be display when
error had been detected for the 5 th times.
If Error is detected, 'CHECKING' will be display instead of 'ER-
CD**' display. 'ER-CD**' display will only be display when
error had been detected for the 5 th times.
CD-DP900H/E
– 18 –
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.
• 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.
(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.
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).
(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.
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.
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
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
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.
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.
– 19 –
CD-DP900H/E
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] [VIDEO] + [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] [CLOCK] + [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
[ON/STAND-BY] [TUNER] + [ASPM]
TEST 10
RDS TEST
During POWER OFF mode, push below each 2 keys [ON/STAND-BY] key.
Then go to each TEST MODE.
Then go to each TEST MODE.
CD-DP900H/E
– 20 –
Yes
Yes
Hold down the ASPM button for 3 more second.
No operate. After displayed “END”. Return to
previous station.
previous station.
“ASPM” blinks in the display.
Begin to scan start 87.50
→
108.00 MHz
Preset CH memory full over?
SD (TUNE) DET out OK?
Yes
No
No
No
No
No
If count 1st OK?
Yes
If count 2nd OK?
Yes
RDS signal or not? PI—identify
Yes
Comparing PI cord
same or not?
between current receiving
PI and before PI which is
already memorized by
ASPM on this time.
same or not?
between current receiving
PI and before PI which is
already memorized by
ASPM on this time.
Yes
Yes
No
Comparing freg.
same or not?
between current receiving
frequency and (already)
previouslymemorized
frequency.
same or not?
between current receiving
frequency and (already)
previouslymemorized
frequency.
No
Memorized to the lowest vacant
preset channel.
preset channel.
No
Memorized to the lowest vacant
preset channel.
preset channel.
Compare the field
strength of current
receiving signal.
Is receiving signal stronger
than signal which has same PI
cord and is already
memorized to preset
memory ahead of this
receiving time?
strength of current
receiving signal.
Is receiving signal stronger
than signal which has same PI
cord and is already
memorized to preset
memory ahead of this
receiving time?
No effect
No effect
No effect
Effect
Pass
No effect
No effect
Pass
No effect
No effect
Pass
No effect
No effect
Pass
No effect
No effect
Displayed the TTL quantity of memorized
stations by ASPM operation on this time.
And return to the previous
receiving freq. automatically.
stations by ASPM operation on this time.
And return to the previous
receiving freq. automatically.
Begin to ASPM SCAN from the next
CH-SPAN again.
CH-SPAN again.
Repeat and continue with same format
ASPM operation untill 108 MHz.
After reached 108 MHz, displayed the TTL
quantity of memorized stations.
And return to the previous receiving freq.
automatically.
ASPM operation untill 108 MHz.
After reached 108 MHz, displayed the TTL
quantity of memorized stations.
And return to the previous receiving freq.
automatically.
Preset CH memory become full over?
Yes
No
Comparing freg.
same or not?
Between current receiving
frequency and (already)
previously memorized
frequency.
same or not?
Between current receiving
frequency and (already)
previously memorized
frequency.
ASPM, summary operation
RDS OPERATION (FOR CD-DP900H ONLY)
Click on the first or last page to see other CD-DP900 (serv.man27) service manuals if exist.