Pioneer TS4, Service Manual, Page: 45 / 71

TS4
45
[Enter checking around IC2001 (OMEGA)
or Memory devices]
[Add solder to Resistor-Arrays around IC2001]
[Add solder to IC3001]: FLASH ROM (I)
[Add solder to IC3003]: DRAM
[Add solder to IC3002]: FLASH ROM (II)
[Replace IC3001]: FLASH ROM (I)
[Replace IC3003]: DRAM
[Replace IC3002]: FLASH ROM (II)
[Replace the MAIN Ass’y]
↓
[Push all the keys, one by one.]
<LED (88:88) lights up>
<K6001:3.3V/K6002:5V
Both correct?>
<IC6001 Pin53 (IRQ_Teiden) High?>
<IC6001 Pin54 (IRQ_key) Low?>
<K2001 27MHz oscillation correct?>
<R3005 (XRESETO High)>
<IC6001 Pin63(SDA)/Pin64 (SCL)
both High?>
[Replace R2098]
(See the bottom side of IC2001)
[Replace IC6001]
[Replace parts around VCXO]
(For example: crystal resonator,
IC2003...)
[Replace R3005]
<After replacing C6013, OK?>
YES
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
(b) (See page 46)
NO
<IC6001 Pin5 (XSTBY) High?>
↓
[Replace parts around Q6017/Q6018]
YES
<Replace the FRONT Ass’y>
NO
[Enter I2C (IIC) check]
↓
((B))
NO
(See page 47)
YES
(a) (From page 44)