Sharp CD-MPS777H User manual

CD-MPS777H
SERVICE MANUAL
In the interests of user-safety the set should be restored to its
original condition and only parts identical to those specified be
used.
No. S4416CDMP777H
SHARP CORPORATION
CONTENTS
Parts marked with " " are important for maintaining the safety of the set. Be sure to replace these parts with specified ones for
maintaining the safety and performance of the set.
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
CHAPTER 1. GENERAL DESCRIPTION
[1] Specifications ................................................ 1-1
[2] Names of parts .............................................. 1-2
CHAPTER 2. ADJUSTMENTS
[1] Mechanism section........................................ 2-1
[2] Tuner section................................................. 2-1
[3] CD section ..................................................... 2-1
[4] TEST MODE ................................................. 2-2
[5] CD section ..................................................... 2-4
[6] CD Changer mechanism section................... 2-5
CHAPTER 3. MECHANISM BLOCKS
[1] Caution on diassembly .................................. 3-1
[2] Removing and reinstalling the main parts........ 3-4
CHAPTER 4. DIAGRAMS
[1] Block diagrams .............................................. 4-1
CHAPTER 5. CIRCUIT DESCRIPTION
[1] Notes on schematic diagram ......................... 5-1
[2] Types of transistor and LED........................... 5-1
[3] Waveforms of CD circuit ................................ 5-2
[4] Voltage ........................................................... 5-3
CHAPTER 6. CIRCUIT SCHEMATICS AND PARTS
LAYOUT
[1] Schematic diagram ........................................ 6-1
[2] Wiring side of PWB .......................................6-11
CHAPTER 7. FLOWCHART
[1] Troubleshooting ............................................. 7-1
CHAPTER 8. OTHERS
[1] Function table of IC........................................ 8-1
[2] FL Display .................................................... 8-10
Parts Guide
CD-MPS777H
MODEL
CD-MPS777H Mini Component System consisting of CD-MPS777H
(main unit) and CP-MPS777H (speaker system).
MINI COMPONENT SYSTEM

CD-MPS777H
– i –
<Standard>—←
SAFETY PRECAUTION FOR SERVICE MANUAL
Precaution to be taken when replacing and servicing the Laser Pickup.
The AEL (Accessible Emission Level) of Laser Power Output for this model is specified to be lower than Class 1 Requirements.
However, the following precautions must be observed during servicing to protect your eyes against exposure to the Laser beam.
(1) When the cabinet has been removed, the power is turned on without a compact disc, and the Pickup is on a position outer than
the lead-in position, the Laser will light for several seconds to detect a disc. Do not look into the Pickup Lens.
(2) The Laser Power Output of the Pickup inside the unit and replacement service parts have already been adjusted prior to shipping.
(3) No adjustment to the Laser Power should be attempted when replacing or servicing the Pickup.
(4) Under no circumstances look directly into the Pickup Lens at any time.
(5) CAUTION - Use of controls or adjustments, or performance of procedures other than those specified herein may result in
hazardous radiation exposure.

CD-MPS777H
1 – 1
AudioCD-MPS777HService ManualCD-MPS777HMarketE
CHAPTER 1. GENERAL DESCRIPTION
[1] Specifications
General
Amplifier
Power source AC 230 V, 50 Hz
Power
consumption
Power on: 140 W
Power stand-by: 0.6 W
Dimensions Width: 260 mm (10-1/4")
Height: 330 mm (13")
Depth: 326 mm (12-7/8")
Weight 9.1 kg (20.1 lbs.)
Output power PMPO: 1100 W
MPO: 550 W (275 W + 275 W) (DIN 45 324)
RMS: 300 W (150 W + 150 W) (DIN 45 324)
RMS: 140 W (70 W + 70 W) (DIN 45 500)
Output terminals Speakers: 6 ohms
Headphones: 16 - 50 ohms
(recommended: 32 ohms)
Video output: 1Vp-p
Input terminals Game/ Auxiliary (audio signal):
500 mV/ 47 k ohms
Game/Video: 1Vp-p
CD player
Tuner
Cassette deck
Type 5-disc multi-play compact disc player
Signal readout Non-contact, 3-beam semiconductor laser
pickup
D/A converter 1-bit D/A converter
Frequency
response
20 - 20,000 Hz
Dynamic range 90 dB (1 kHz)
Frequency range FM: 87.5 - 108.0 MHz
AM: 522 - 1,620 kHz
Frequency
response
50 - 14,000 Hz (normal tape)
Signal/noise ratio 55 dB (TAPE 1, playback)
50 dB (TAPE 2, recording/playback)
Wow and flutter 0.35 % (DIN 45 511)
Type 3-way type speaker system with passive ra-
diator
Super tweeter 2
5 cm (2") tweeter 1
16 cm (6-1/2") woofer 1
10 cm (4") passive radiator
Maximum input
power
300 W
Rated input power 150 W
Impedance 6 ohms
Dimensions Width: 277 mm (10-7/8")
Height: 330 mm (13")
Depth: 279 mm (11")
Weight 3.9 kg (8.6 lbs.)/each
CD-MPS777H
Specifications for this model are subject to change without
prior notice.
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER
TO THE OPERATION MANUAL.
CP-MPS777H

CD-MPS777H
1 – 2
[2] Names of parts
Front panel
1. Disc Trays
2. Timer Indicator
3. RDS ASPM (Auto Station Programme Memory) Button
4. On/Stand-by Button
5. RDS Programme Type/
Traffic Information Search Button
6. RDS Display Mode Select Button
7. Disc Track Up or Fast Forward, Tape 2 Fast Forward,
Tuner Preset Up, Time Up Button
8. Clock/Timer Button
9. Tuning Up Button
10. Tuning Down Button
11. Disc Track Down or Fast Reverse, Tape 2 Rewind,
Tuner Preset Down, Time Down Button
12. Equalizer Mode Select Button
13. Tape 1 Cassette Compartment
14. Headphone Socket
15. Game/Video Input Sockets
16. Disc Number Select Buttons
17. Disc Direct Play Button
18. Disc Tray Open/Close Button
19. Character Button
20. Enter Button
21. Disc Play or Repeat, Tape Play Button
22. Memory/Set Button
23. Tape 2 Record Pause Button
24. MP3 Disc Navigation Mode Select Button
25. Disc or Tape Stop Button
26. Cursor Buttons
27. Extra Bass/Demo Mode Button
28. Volume Control
29. Tape 2 Cassette Compartment
30. Tuner (Band) Button
31. CD Button
32. Tape (1 2) Button
33. Game/Video Button
16
18
28
20
22
26
27
2
8
9
4
3
1
19
25
24
29
17
23
14
15
13
10
11
12
31 32 3330
21
6
7
5
CD-MPS777H
Display
1. Disc Number Indicators
2. MP3 Folder Indicator
3. MP3 Title Indicators
4. RDS Indicator
5. Traffic Announcement Indicator
6. Dynamic PTY Indicator
7. Traffic Programme Indicator
8. MP3 Total Indicator
9. Sleep Indicator
10. Timer Play Indicator
11. Timer Recording Indicator
12. Tape 2 Record Indicator
13. Daily Timer Indicator
14. FM Stereo Mode Indicator
15. FM Stereo Receiving Indicator
16. Tape Play Indicator
17. Memory Indicator
18. MP3 Disc Indicator
19. Extra Bass Indicator
20. Disc Repeat Play Indicator
21. Disc Pause Indicator
22. Disc Play Indicator
8 93211011764 125
18 19 20
21 22
13
16
1514
17
Rear panel
1. Cooling Fan
2. AC Power Lead
3. FM 75 Ohms Aerial Socket
4. AM Loop Aerial Socket
5. Video Output Socket
6. Speaker Terminals
1
4
5
3
6
2

CD-MPS777H
1 – 3
-
Remote control
1. Remote Control Transmitter
2. Disc Number Select Buttons
3. Clock/Timer Button
4. Character Input/Disc Direct Search Buttons
5. MP3 Disc Navigation Mode Select Button
6. Enter Button
7. Memory/Set Button
8. Tape 2 Record Pause Button
9. Disc Track Down or Fast Reverse, Tape 2 Rewind,
Tuner Preset Down, Time Down Button
10. Disc or Tape Stop Button
11. CD Button
12. Tuner (Band) Button
13. Equalizer Mode Select Button
14. Extra Bass Button
15. On/Stand-by Button
16. Disc Random Button
17. Character Button
18. Cursor Buttons
19. Disc Clear/Dimmer Button
20. Disc Pause Button
21. Disc Track Up or Fast Forward, Tape 2 Fast Forward,
Tuner Preset Up, Time Up Button
22. Disc Play or Repeat, Tape Play Button
23. Tape (1 2) Button
24. Game/Video Button
25. MP3 Disc Display Button
26. Volume Up and Down Buttons
1
2
3
4
5
7
9
15
16
17
18
19
24
25
26
12
13
10
21
22
23
20
14
6
8
11
CD-MPS777H
1. Tweeter
2. Passive Radiator
3. Woofer
4. Super Tweeters
5. Speaker Wire
1
2
3
5
4
CP-MPS777H

CD-MPS777H
2 – 1
AudioCD-MPS777HService ManualCD-MPS777HMarketE
CHAPTER 2. ADJUSTMENTS
[1] Mechanism section
• Driving Force Check
• Torque Check
• Tape Speed
[2] Tuner section
fL: Low-range frequency
fH: High-range frequency
• AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
•FMIF
Notes:
1. Description of the "FM IF Adjustment" is not carried on this Man-
ual. It is because the IF coil in the FM front end section has been
best adjusted in the factory so that its further adjustment is not
needed at the field. When replacing the FM front end assembly, no
adjustment is needed either.
2. The parts in the FM front end section are prepared in a complete
unit, so you can't obtain each part individually.
[3] CD section
CD Error code description
* 'CHECKING'
If Error is detected, 'CHECKING' will be displayed instead of 'ER-
CD**'. 'ER-CD**' display will only be displayed when error had been
detected for the 5th times.
Torque Meter Specified Value
Play: TW-2111 Tape 1: Over 80 g
Tape 2: Over 80 g
Torque Meter Specified Value
Tape 1 Tape 2
Play: TW-2111 30 to 80 g.cm 30 to 80 g.cm
Fast forward: TW-2231 — 70 to 180 g.cm
— 70 to 180 g.cm
Test Tape Adjust-
ing Point
Specified
Value
Instrument
Connection
Normal
speed
MTT-111 Variable
Resistor in
motor.
3,000 ±30 Hz
Speaker
Speaker Ter-
minal (Load
resistance: 6
ohms)
Figure 2-1
Test Stage Frequency Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
AM IF 450 kHz 1,620 kHz T351 *1
AM Band
Coverage
— 522 kHz (fL): T306
1.1 ±0.1 V
*2
AM
Tracking
990 kHz 990 kHz (fL): T303 *1
*1. Input: Antenna Output: TP302
*2. Input: Antenna Output: TP301
TAPE MECHANISM
Tape
Motor
Variable Resistor in motor
Figure 2-2 Adjustment Points
Error Explanation
01 When Pickup set inner position, inner switch cannot detect
'ON' level for 10 secs.
10* CAM error. Can't detect CAM switch when CAM is moving.
11* When it detect cam operation error during initialize pro-
cess.
20* TRAY error. Can't detect TRAY switch when TRAY is mov-
ing.
21* When it detect TRAY operation error during initialize pro-
cess.
31 When it change to CD function, DSP cannot read initial
data.
SO302
FM ANTENNA
TERMINAL
AM IF
TP301
TP302
R356
R380
T303
T306
L354
FE301
T351
CNP301
AM LOOP
ANTENNA
AM BAND
COVERAGE fL
AM TRACKING
fL
MAIN PWB
1

CD-MPS777H
2 – 2
[4] TEST MODE
•Setting the test mode
During stand-by mode, press ON/STAND-BY button while pressing
down the button and X-BASS/DEMO button. then, press the CD
button to enter the test mode.
IL isn’t done
OPEN/CLOSE operation is using manual. IL isn’t done
<< >>,<< >>buttons make pick's slide possible. IL isn’t done
to page 2-3
<<PLAY>> key input.
C D T E S T
A
Do TOC IL. Do normal play.
When these following key is input into PLAY key, track num-
ber can be appoint directly.
<<MEMORY>>
key input.
<< 1>> key: Track 4
<< 2>> key: Track 9
<< 3>> key: Track 15
Adjustment result automatically will
display as below for each 2 sec:
a) "FOF_XXXX"
b) "TOF_XXXX"
c) "TBAL_XX"
d) "TGAN_XX"
f) "FGAN_XX"
g) "RFLS_XX"
––––––––
<<STOP>> key input.
STOP
explanation:
a) Focus off set = "FOF_XXXX"
b)Tracking off set = "TOF_XXXX"
c)Tracking balance = "TBAL_XX"
d)Tracking Gain = "TGAN_XX"
f) Focus Gain = "FGAN_XX"
g) RF level shift = "RFLS_XX"
VOL — Last memory
P.GEQ — FLAT
X-BASS — OFF
To cancel : Power OFF

CD-MPS777H
2 – 3
Sliding the PICKUP with<< >>, << >> button must only be
in STOP mode.
<<MEMORY>> key input.
Laser ON.
<<MEMORY>> key input.
Tracking OFF play at that specific point.
<<MEMORY>> key input.
Tracking ON play from that specific point.
<<MEMORY>> key input.
Adjustment result automatically will display as below for each 2 sec :
a) "FOF_XXXX"
b) "TOF_XXXX"
c) "TBAL_XX"
d) "TGAN_XX"
f) "FGAN_XX"
g) "RFLS_XX"
<<STOP>> key input.
STOP
explanation:
a) Focus off set = "FOF_XXXX"
b)Tracking off set = "TOF_XXXX"
c)Tracking balance = "TBAL_XX"
d)Tracking Gain = "TGAN_XX"
f) Focus Gain = "FGAN_XX"
g) RF level shift = "RFLS_XX"
VOL — Last memory
P.GEQ — FLAT
X-BASS — OFF
To cancel : Power OFF
A

CD-MPS777H
2 – 4
[5] CD section
CD Error code description
* 'CHECKING'
If Error is detected, 'CHECKING' will be displayed instead of 'ER-
CD**'. 'ER-CD**' display will only be displayed when error had been
detected for the 5th times.
Standard Specification of Stereo System Error Message Display Contents
(*) CHECKING:
If CD changer mechanism error is detected, 'CHECKING' will be dis-
play instead of 'ER-CD**'. 'ER-CD**' display will only be display when
error had been detected for the 5 th times.
Speaker abnormal detection and +B PROTECTION display
In case speaker abnormal detection or +B PROTECTION had
occurred, it can be check by pressing 'POWER', ' ' and 'X-BASS'
button. MicroComputer version number will displayed as "XM******".
Press ‘VIDEO/AUX’ button during version number display and then
press ‘POWER’, ‘MEMORY/SET’ and ‘VIDEO/AUX’ button. Display
will show "S** B**". S is referring to speaker abnormal detection and B
is referring to +B PROTECTION. ** is in hex valve.
+B PROTECTION is condition when irregular process occur on power
supply line.
BEFORE TRANSPORTING THE UNIT
The following process need to be taken after set tapering/parts
replacement.
1. Press the ON/STAND-BY button to enter stand-by mode.
2. While pressing down the button and the X-BASS/DEMO but-
ton, press the ON/STAND-BY button. The Micro Computer version
number will be displayed as "XM******".
3. Press OPEN/CLOSE button until "WAIT"→"FINISHED" appears.
4. Unplug the AC cord and the unit is ready for transporting.
Error Explanation
01 When Pickup set inner position, inner switch cannot detect
'ON' level for 10 secs.
10* CAM error. Can't detect CAM switch when CAM is moving.
11* When it detect cam operation error during initialize pro-
cess.
20* TRAY error. Can't detect TRAY switch when TRAY is mov-
ing.
21* When it detect TRAY operation error during initialize pro-
cess.
31 When it change to CD function, DSP cannot read initial
data.
Error Contents Display Notes
CD Pickup Mechanism Error. 'ER-CD01' PU-IN SW Detection NG.
CD Changer Mechanism Error. 'ER-CD**' (*) 10: CAM SW Detection NG during normal operation
11: CAM SW Detection NG during initialize process
20:TRAY SW Detection NG during normal operation
21:TRAY SW Detection NG during initialize process
CD DSP Communication Error. 'ER-CD31' DSP COMMUNICATION ERROR.
Focus Not Match/IL Time Over. 'NO DISC'
TUNER PLL Unlock. PLL Unlock.
F
M 87.5 MH
z

CD-MPS777H
2 – 5
[6] CD Changer mechanism section
• A number in the drawing sheet is the number of the parts guide
(CHANGER MECHANISM PARTS).
140
141
HALF GEAR
MUST ARRANGE AS SHOWN
1

CD-MPS777H
2 – 6
139
2
APPLY SANKOL BEFORE FIX
FIX ITEM 1 ACCORDING TO THE
SHOWN PICTURE ABOVE
ROTATE MODE BIG GEAR UNTIL REACH AS SHOWN IN PICTURE

CD-MPS777H
2 – 7
APPLY GREASE
PULL THE LEVER UNITIL
REACH THE ARROW MARK
143
112
3

CD-MPS777H
2 – 8
FIGURE 1
FIGURE 2
APPLY GREASE SLOT CLAMP SW ARM INSIDE BASE SLOT
152
142
118
4

CD-MPS777H
2 – 9
127
128
5
APPLY GREASE AT BOTTOM SIDE
OF GEAR FOLLOW MARKING
NO NEED APPLY GREASE AT BOTTOM
SIDE
O.K
BLACK MARK
FIGURE 1
N.G
OTHER THAN FIGURE 1 DIRECTION ALL N.G
APPLY GREASE AT
TOP SIDE OF GEAR
FOLLOW MARKING

CD-MPS777H
2 – 10
APPLY GREASE AT
HALF GEAR AREA
ROTATE CLOCKWISE UNTIL REACH HERE (MAXIMUM)
6
129

CD-MPS777H
2 – 11
CHANGE COLOR TO BLACK
150151148
7

CD-MPS777H
2 – 12
124
131
TRAY BIG GEAR
CHANGE COLOR
TO BLACK
TRAY BIG GEAR
CHANGE COLOR
TO BLACK
GREASE APPLICATION LENGTH
GREASE APPLICATION PORTION
MUST FREE FROM GREASE THE SHOWN AREA
O.K
N.G
SHOWN HOLE MUST FACING ARROW DIRECTION
8

CD-MPS777H
2 – 13
TR-RE JOINT GEAR C
APPLY GREASE AT
BOTTOM SIDE ONLY
APPLY GREASE ONLY AT TOP SIDE GEAR
MUST FIX ACCORDING TO THE HOLE'S
138 126 125
9

CD-MPS777H
2 – 14
10
148 147 146 145

CD-MPS777H
2 – 15
APPLY GREASE
WHEN FIXING ITEM 2 MUST FOLLOW AS SHOWN
121
144
130
11