DMC-J7R(K)
DMC-J7R
8
COVER1,1P(
It is advisable to use the TEST mode (refer to Error Data Display Mode, P15) indicating the causes of troubles beforeY Abnormal display
starting repair. Causes of operation errors (up to 10 errors) are recorded as error codes. This information is useful
for repair.
Is waveform output from CNS 482 pins 1 to 3?Is waveform output from IC 401 pins 45 to 47?
When does not functionAre the pin7 (VCC) and pin 6 (GND) normal?No98.11.30
When the CD section does not operate When the objective lens of the optical pickup is dirty,this section may not operate.CleanYesNo
the objective lens,and check the playback operation.When this section does not operate even after the above step is taken,check
Check the periphery of IC401.
the following items.Check between IC401 and
CNS482.
Remove the cabinet and follow the troubleshooting instructions.
"Track skipping and/or no TOC(Table Of Contents) may be caused by build up of dust other foreign matter on the laser pickup lens.Yes1:44
Before attempting any adjustment make certain that the lens is clean. If not, clean it as mentioned below."
Check for pattern breakage of flexible PWB, check for
PM
Turn the power off.defects of display microcomputer (replace the display unit).
Gently clean the lens with a lens cleaning tissue and a small amount of isopropyl alcohol. y[W
Do not touch the lens with the bare hand.
Y Playback state cannot be set
Is the power supply turned on when the remote controlPerform the check stated in item "Power is not turned on
button or main unit button is pressed?Nowhen the PLAY button is pressed".When it has been ascertained that the address up to cluster address is normal in the TEST mode.15
YesIs initialization performed normally in case of high- reflectionDoes the playback time display advance?
disc playback?YesTROUBLE SHOOTING
Does the display operate normally?Perform the check stated in item "Abnormal display".No
No
No
Yes
Check IC201 and IC202 connection line.
Is playback state set?Perform the check stated in item "Playback state connot be
Noset".
Yes
Check the lead-in photointerrupter, mechanical flex
Is the lead-in photointerrupter set to OFF when the opticalPWB soldering and CNS601 connection.
Is audio output normal?Perform the check stated in item "Audio playback circuit".pickup moves to the innermost periphery in NORMAL mode?No
No
(Is TP660 in H level?).
Yes
Yes
Is recording/playback operation normal?Perform the check stated in item "Recording/playback
Nooperation".Ia an attempt to repeat repeatedly the TOC part performed
Replace the disc.
on the low-reflection disc?No
Yes
Y Power is not turned on when the / button
is pressed.Position check in INNER mode
Is power turned on when the remote control button is
pressed?Y Audio playback clrcult
Although the playback time display is acting., no sound is given during playback in the normal mode.
No
Check IC201 pins 70 to 72, pin 74 and IC501 pins 9, 10, 11,
Is audio wavefrom output from IC501 pins 19 and 20?
No15
Is operation normal when the main body button is pressed? Check the periphery of remote controller and main unit
YesYesheadphone terminal (J703) and IC401.
NoIs audio wavefrom output from IC703 pins 18 and 19.Check the pins 5 and 6 of IC703.
No
Yes
Is the pin 57 of IC401 in H state?Check the position of Hold switch.
NoCheck whether there is defective solder joint of audio signal
Is audio wavefrom output from J703 pins 3 and 4.
YesNoline between IC703 and J703
Check the DISC IN (SW901) switch of mechanism PWB.YesAre IC401 pin 97 set to "L"?
No
YesCheck headphones jack,and periphery of headphone.
Is clock supplied to the pins 11 and 14 of IC401?Check that voltage is applied to the periphery of IC403.
No
Yes
Is 2.5V applied to TP811?Check whether there is solder touch of part connected to
Nothe +2.5V line. |
ACEC
KENWOOD
