Service Check Procedures - Yamaha CDR-HD1000 Service Manual

QQ
3 7 63 1515 0

SERVICE CHECK PROCEDURES

When the main unit fails to operate
Check
connections NG
of all
cables.
OK
Check
NG
the power
supply.
OK
Does
the FL
NO
display light
up?
YES
* ATAPI device
or ACDR2
defective
* ATAPI device means HDD and CD-R/W drive.
TE
When MAIN P.C.B. is defective
L 13942296513
The MAIN P.C.B. consists of the following 3 blocks.
1) CPU, RAM and flash ROM
2) ACDR2 and DIR5
3) CODEC and analog
Check
the
RESET
signal.
OK
Check
the
CPU
clock.
OK
Is the ICS
terminal of the flash
memory at LOW and
accessed?
OK
www
Is the
DRAM
fresh function
at work?
.
OK
DRAM defective
http://www.xiaoyu163.com
Reconnect cables
and check again.
Check the condition
+5V, +12V, ±VA
of the power supply
section.
Does the
MAIN P.C.B.
NO
blue LED indicate
defective
power ON?
YES
FL driver or
FL display
failure
Refer to the
RESET circuit
NG
waveform at
defective
the point C
on p.34.
Refer to the
NG
waveform at
Crystal defective
the point A
on p.34.
NG
CPU defective
Flash memory failure
NG
x ao
y
or CPU defective
i
http://www.xiaoyu163.com
8
When ATAPI device is defective
Possible symptom varies depending on the
defective point.
• "HDD CHECK" appears on the FL display.
• Only the scale of the level meter appears on the FL display.
• Turning on the drive switch will result in hang-up.
• Abnormal mechanical noise is heard from the unit.
Is abnormal
mechanical noise
heard from
HDD?
Check the
IDE cable.
Check the
HDD operation
by using the *HDD
single mode.
CD-R/W drive
Q Q
defective
3 6 7 1 3
* For the HDD single mode, refer to the
description of the HDD single mode.
HDD single mode
By using the HDD single mode, it is possible to operate the
HDD alone.
Starting the HDD single mode
1) Turn off the power.
2) Disconnect the IDE cable connected to the CD-R/W
drive. (Refer to the figure 3 in p.6.)
3) While pressing the MENU key and
turn on the power and keep pressing these keys.
4) The program version is displayed first followed by the
HDD.
Functions of the HDD single mode
None of the CDR key, the COPY key and the
functions.
Other keys function just like in the normal mode.
HDD operation check
1) Record the music signals from the external equipment
connected to the main unit on to the HDD.
2) Reproduce the music signals recorded on to the HDD.
u163
Caution
As the audio circuit in this equipment uses a word clock
.
(44.1kHz) of the CD-R/W, do not disconnect the word
clock cable.
When the word clock cable is disconnected, this equipment
will fail to operate properly. (Refer to the figure 3 in p.6.)
2 9 9 4 2 8
YES
HDD defective
NO
IDE cable
NG
defective
OK
NG
HDD defective
OK
1 5 0 5 8 2 9 9 4
key simultaneously,
m
co
CDR-HD1000
9 9
2 8 9 9
key
8