Integra DTR-5.9 Service Manual page 100

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OPERATION CHECK-2
SPEAKER PROTECT-2
DC Voltage detection check
[When]
1. Exchange power transistors (Q6050 - Q6056, Q6060 - Q6066).
2. Exchange amplifier PC board ass'y (NAAF-9424).
[Procedure]
Note : No load. No input.
1. Press and hold down CD button, then press On/Standby button while the unit is powered on.
" Test - _ " is displayed only for 5 seconds.
FL Display
2. Press Game/TV button while the characters of " Test - _ " are displayed.
The unit will be in the state of " Test-4-00 ".
3. Repeatedly press + (Tone) button until the characters of " Test-4-21 " are displayed.
Check whether the operation starts and continues automatically as follows.
TE
L 13942296513
If all channels are OK, the characters of " Test-4-35 " are displayed.
4. Press On/Standby button.
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T e s t - _
Blinks
T e s t - 4 - 0 0
T e s t - 4 - 2 1
T e s t - 4 - 2 1
Front L ch
Check
P r o te c t OK
T e s t - 4 - 2 2
Front R ch
Check
P r o te c t O K
T e s t - 4 - 2 3
Center ch
Check
P r o te c t O K
T e s t - 4 - 2 4
Surround L ch
Check
P r o te c t O K
T e s t - 4 - 3 5
C l e a r
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2 9
8
Q Q
T es t - 4-25
3 6 7 1 3 1 5
Prot e c t O K
T es t - 4-26
Prot ec t O K
T es t - 4-27
Prot ec t O K
Pro te c t
Turn off
co
.
9 4 2 8
0 5 8 2 9 9 4 2 8
Surround R ch
Check
Surround Back L ch
Check
Surround Back R ch
Check
m
DTR-5.9
9 9
9 9