DMC-J7R(K)
COVER1,1P(
Y The spindle motor fails to run.Does the head move Test disc
MD adjustment needs two types of disc, namely recording disc (low reflection disc) and playback-only disc (high
reflection disc). 98.11.30
Does the waveform appear on the IC201 pins 24 and 25 afterCheck the IC201 periphery.TypeTest discNo
TEST mode AUTO2 completion and in this state?
1High reflection disc TG YS-1 (SONY)
Yes2Low reflection disc Recording minidisc
Note: Use the low reflection disc on which music has been recorded.1:45
Does waveform appear on the IC601 pin 13?Replace. IC601
No Extension Cable (See Fig.10)
Yes
TypeParts No.PM
1Flat Cable for servicing 16PinQCNWK0110AFZZ y[W
Does waveform appear on IC901 pins 1, 19 and 20?L608, IC201, IC901, CN601 and flex, etc. soldering check
No2Extension Connector for Service 16PinRUNTK0460AFZZ
PWB sideCN60116 pinMecha Flexible PWB
Yes
QCNWK0110AFZZ16 PIn26
Replace the spindle motor.16pin Flat Cable
RUNTK0460AFZZ
Extension PWB for servicing 16pin
Entering the TEST modeFigure 10
1. Setting at port (in standby state, disc-free state or power nonconnected state)
(1) Set the port as follows.TROUBLE SHOOTING
Y Recording/playback operation TEST1 : "Low"
TEST0 : "High"
Insert a low reflection disc, and ascertain audio output by normal playback, and then set TEST REC mode.(2) Press the PLAY button in the standby state (it is allowed to insert the disc or to connect the power supply).
(3) Test Mode STOP [ _ T E S T _ ]
Does the head move down, failing to start record evenCheck voltage of pins 52 and 53 of IC201, pins 2, 4, 7, and 9 of2. Setting by special button operation (in standby state)
Yes
when the continuous record mode is set after address? IC651, pins 3 and 4 of CNS601. Check whether disc is record- (1) Holding down the DISP button and ENTER button, press the PLAY button.
inhibited.
(2) Normal mode setting initialization (BASS setting, VOL setting, etc.)
No
(3) Indication of microcomputer version for one second [ ]
Yes
Does the RF waveform of TP201 appear when playback isDestination
Microcomputer versionEEPROM version
No
(4) Whole LCD lighting for 2 seconds
(5) Test Mode STOP [ _ T E S T _ ]
*When the PLAY button is pressed during indication (3) and (4), the process proceeds to (5).
Does level of pins 34 of IC401 and pin 17 of IC101 change Leaving the TEST mode
Check periphery of IC401 and IC101.
depending on record and playback?No(1) Press the STOP button in the TEST mode stop state or version indicating state or whole LCD lighting state.
(2) EEPROM rewrite-enable area updating, adjustment error setting (so as to adjust all the items when the power supply is turned
on in the normal mode)
Yes(3) Change to standby state
Test Mode
Check for soldering failure of IC201 .
Is RF pattern output from IC201 pin 50?1. AUTO 1 ModeY Perform preliminary automatic adjustment.NoY If the combination of mechanism and pickup8. TEST-REC ModeY Continuous record from the specified address is performed.
Yes PWB has been changed, be sure to start from AUTO1.Y Change of record laser output(servo gain is also changed according to laser output).
2. AUTO 2 ModeY Perform ATT (attenuator) automatic adjustment.Y The temperature correction is performed only
Y Perform continuous playback (error rate display, when servo start is performed, but the posture
Check whether there is any damage in IC101, periphery of jump test) correction is not performed during continuous
recording.
laser diode.3. MANUAL 1 ModeY Temperature is displayed. (Updating in realtime)
Check for defects of IC351 in head drive flexible PWB,[Y Seeing the displayed adjustment value, perform preliminary manual adjustment.9. NORMAL ModeY The mode is changed from the TEST mode to the normal mode without adjustment.
Q351 to 354, head, flexible PWB. (Error rate indication, jump test)[Y In the normal mode the internal operation mode,
memory capacity, etc. areindicated.
4. MANUAL 2 ModeY Temperature is displayed. (Updating in realtime)Y In the normal mode both temperature correction
Y Seeing the displayed adjustment value and posture correction are perfomed.
perform manfully the preliminary adjustment.
(Error rate indication, jump test)[10. DIGITAL INPUT modeY Digital input information is displayed.
Is audio monitor output given in normal mode LINE INCheck waveforms of pins 9 to 12 of IC501, pins 70 to 73 ofY Continuous playback is performed11. ERROR INFORMATIONY Error information is displayed.DMC-J7R
Yes
record?IC201. (error rate display, jump test). ModeY Error information is initialized
5. RESULT 1 ModeY The value adjusted in AUTO1 or MANUAL1 is12. E2-PROM ModeY Factors of digital servo are changed manually.
No[ indicated. (Each servo is turned on individually.)
Y (Execution in servo "OFF" state").Y Cut-off frequency of BASS1, BASS2 and BASS3
6. RESULT 2 ModeY The value adjusted in AUTO 2 or MANUAL 2 is[ is selected manually.
Check whether the pin 7 of IC501 and the pin 59 of IC201 are in indicated.Y Temperature detection terminal voltage is
Is waveform obtained on IC501 pins 3 and 6?[H state.Y Adjustment value is changed manually. measured, and the reference value is set.
YesY Defaults are selected and set.
(error rate display, jump test).
No7. TEST-PLAY ModeY Continuous playback from the specified addressY Setting of EEPROM protect area is updated. (In case of protect releasing)
is performed.
Y 1 line, 10 lines or 400 lines manual jump is13. INNER ModeY Determine the position where the INNER switch
Is audio waveform observed on the pins 18 and 19 ofDoes voltage on the IC701 pins 13 to 15 change in case of performed.[ is turned on. (only high reflection disc).
NoIC703?record VOLUME UP/DWN?Y C1 error rate display (pit section), ADIP error rate display (groove section)Y The temperature correction is performed only when servo start is performed, but the posture
correction is not performed.
Yes when servo start is performed, but the posture[Y The temperature correction is performed only
These modes are not used for service.
correction is not performed duringcontinuous
playback.
Check whether input waveform is observed on the pins 5
and 6 of IC703.
9 |
ACEC
KENWOOD
