JVC HM-HDS1EK Service Manual page 3

2. In Case of an HDD Failure
When a HDD/VHS DUAL RECORDER AC cord is plugged into a power outlet, the boot loader is read from the
IC8204 (8M FLASH ROM), which activates the HDD and reads the system files in the HDD before getting ready
for operation. In consequence, the HDD/VHS DUAL RECORDER cannot be turned on if the HDD fails.
In case a failure of the HDD is in doubt, use the following procedure to switch the main power of the set ON using
the VHS section alone, by bypassing the HDD operation check.
(1) With the HDD/VHS DUAL RECORDER in the remote control
standby status, transmit code AE from the remote jig for more
than 2 seconds.
(2) The REC LINK button on the HDD/VHS DUAL RECORDER
blinks, indicating that the power supply can be switched ON.
(3) When the code AE is transmitted again from the remote jig,
the button stops blinking and its function is canceled.
<Reference>
VHS
SYSCON
E:08 is displayed in the
case of a
communication error
with the VHS SYSCON
2
40GB
HDD
Firmware
HDD driver
Navigation information
IDE 40PIN
DVD 0_:7_
IC8001 AD 0:31
ASIC_IF
Custom code
43: A code
52: B code
6F: C code
7F: D code
Data code
POWER
HM-HDS1
AD 4:19
IC8204
IC8206
8M FLASH
LADO
AD 0:15
4:11
boot loader
VHS Navi
back up
LADO
AD 16:31
12:19
OPEN
IC8207
IC8205
IC8201
MPEG_DEC
VIO 0:7
Initial mode
Blinks.
BS DIGIATL
HDD
OK
CHANNEL
AD 4:11
AD 12:19