Aiwa AM-HX70 Service Manual page 30

2) Checking the EF balance value
Press the "DISP" key in the [Focus ON!] state, and check the EF balance DC offset value.
Focus ON!
SE $ **
Center value
SE $80
3) Checking the error rate
Press the "DISP" key in the [All servo ON] state to display the error rate.
The error rate of the recorded disk provides a guideline as to whether the recording state of the disk is good or bad.
**** c ** s
**** c
Jitter
***
Address display
a. Checking the error rate using the PIT disk (TGYS-1)
1. Turn on the "KEY HOLD" switch. [Pi H] appears.
2. Move the pickup to the position right outside the innermost circumference.
3. Press the keys in order of "PLAY"
4. Press the "DISP" key to confirm that the error rate is [0050] or less.
b. Checking the error rate using the MO disk (MDW-74)
1. Turn off the "KEY HOLD" switch. [Gr L] appears.
2. Set [All servo ON] and change the address to near 600c 00s.
3. Confirm that the error rate is [0050] or less.
SLED ERROR
(EF balance)
Address display
Address and error rate display
**** c: Address,
Jitter display
Address and error rate display
"MODE" to set [All servo ON] and change the address to near 600c 00s.
EF balance value
: Error rate
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Jitter display